[libc++] Fix error flags and exceptions propagated from input stream operations

Summary:
This is a re-application of r357533 and r357531. They had been reverted
because we thought the commits broke the LLDB data formatters, but it
turns out this was because only r357531 had been included in the CI
run.

Before this patch, we would only ever throw an exception if the badbit
was set on the stream. The Standard is currently very unclear on how
exceptions should be propagated and what error flags should be set by
the input stream operations. This commit changes libc++ to behave under
a different (but valid) interpretation of the Standard. This interpretation
of the Standard matches what other implementations are doing.

This effectively implements the wording in p1264r0. It hasn't been voted
into the Standard yet, however there is wide agreement that the fix is
correct and it's just a matter of time before the fix is standardized.

PR21586
PR15949
rdar://problem/15347558

Reviewers: mclow.lists, EricWF

Subscribers: christof, dexonsmith, cfe-commits

Differential Revision: https://reviews.llvm.org/D49863

llvm-svn: 357775

libcxx/include/ios

@@ -330,6 +330,15 @@ public:
     void __set_badbit_and_consider_rethrow();
     void __set_failbit_and_consider_rethrow();
 
+    _LIBCPP_INLINE_VISIBILITY
+    void __setstate_nothrow(iostate __state)
+    {
+        if (__rdbuf_)
+            __rdstate_ |= __state;
+        else
+            __rdstate_ |= __state | ios_base::badbit;
+    }
+
 protected:
     _LIBCPP_INLINE_VISIBILITY
     ios_base() {// purposefully does no initialization

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream.formatted.arithmetic/bool.pass.cpp

@@ -15,6 +15,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -75,6 +76,44 @@ int main(int, char**)
         assert(!is.eof());
         assert(!is.fail());
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            bool n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            bool n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream.formatted.arithmetic/double.pass.cpp

@@ -15,6 +15,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -75,6 +76,44 @@ int main(int, char**)
         assert(!is.eof());
         assert(!is.fail());
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            double n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            double n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream.formatted.arithmetic/float.pass.cpp

@@ -15,6 +15,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -75,6 +76,44 @@ int main(int, char**)
         assert(!is.eof());
         assert(!is.fail());
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            float n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            float n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream.formatted.arithmetic/int.pass.cpp

@@ -16,6 +16,7 @@
 #include <istream>
 #include <limits>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -76,6 +77,44 @@ int main(int, char**)
         assert(!is.eof());
         assert( is.fail());
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            int n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            int n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream.formatted.arithmetic/long.pass.cpp

@@ -15,6 +15,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -75,6 +76,44 @@ int main(int, char**)
         assert(!is.eof());
         assert(!is.fail());
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            long n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            long n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream.formatted.arithmetic/long_double.pass.cpp

@@ -15,6 +15,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -75,6 +76,44 @@ int main(int, char**)
         assert(!is.eof());
         assert(!is.fail());
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            long double n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            long double n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream.formatted.arithmetic/long_long.pass.cpp

@@ -15,6 +15,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -75,6 +76,44 @@ int main(int, char**)
         assert(!is.eof());
         assert(!is.fail());
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            long long n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            long long n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream.formatted.arithmetic/pointer.pass.cpp

@@ -19,6 +19,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -97,6 +98,44 @@ int main(int, char**)
         assert( is.eof());
         assert(!is.fail());
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            void* n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            void* n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream.formatted.arithmetic/short.pass.cpp

@@ -16,6 +16,7 @@
 #include <istream>
 #include <limits>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -76,6 +77,44 @@ int main(int, char**)
         assert(!is.eof());
         assert( is.fail());
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            short n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            short n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream.formatted.arithmetic/unsigned_int.pass.cpp

@@ -15,6 +15,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -75,6 +76,44 @@ int main(int, char**)
         assert(!is.eof());
         assert(!is.fail());
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            unsigned int n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            unsigned int n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream.formatted.arithmetic/unsigned_long.pass.cpp

@@ -15,6 +15,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -75,6 +76,44 @@ int main(int, char**)
         assert(!is.eof());
         assert(!is.fail());
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            unsigned long n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            unsigned long n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream.formatted.arithmetic/unsigned_long_long.pass.cpp

@@ -15,6 +15,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -75,6 +76,44 @@ int main(int, char**)
         assert(!is.eof());
         assert(!is.fail());
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            unsigned long long n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            unsigned long long n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream.formatted.arithmetic/unsigned_short.pass.cpp

@@ -15,6 +15,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -75,6 +76,44 @@ int main(int, char**)
         assert(!is.eof());
         assert(!is.fail());
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            unsigned short n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            unsigned short n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream_extractors/chart.pass.cpp

@@ -13,6 +13,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -83,6 +84,80 @@ int main(int, char**)
         assert(!is.fail());
         assert(c == L'c');
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            char n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<wchar_t> sb;
+        std::basic_istream<wchar_t> is(&sb);
+        is.exceptions(std::ios_base::failbit);
+
+        bool threw = false;
+        try {
+            wchar_t n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            char n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<wchar_t> sb;
+        std::basic_istream<wchar_t> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            wchar_t n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream_extractors/signed_char.pass.cpp

@@ -13,6 +13,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -66,6 +67,44 @@ int main(int, char**)
         assert(!is.fail());
         assert(c == 'c');
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            signed char n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            signed char n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream_extractors/signed_char_pointer.pass.cpp

@@ -13,6 +13,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -103,6 +104,46 @@ int main(int, char**)
         assert(std::string((char*)s) == "");
     }
 #endif
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            signed char s[20];
+            is.width(10);
+            is >> s;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            signed char s[20];
+            is.width(10);
+            is >> s;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream_extractors/streambuf.pass.cpp

@@ -11,11 +11,13 @@
 // template <class charT, class traits = char_traits<charT> >
 //   class basic_istream;
 
-// basic_istream<charT,traits>& operator<<(basic_streambuf<charT,traits>* sb);
+// basic_istream<charT,traits>& operator>>(basic_streambuf<charT,traits>* sb);
 
 #include <istream>
 #include <cassert>
 
+#include "test_macros.h"
+
 template <class CharT>
 class testbuf
     : public std::basic_streambuf<CharT>
@@ -65,6 +67,104 @@ int main(int, char**)
         assert(sb2.str() == "testing...");
         assert(is.gcount() == 10);
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb(" ");
+        std::basic_istream<char> is(&sb);
+        testbuf<char> sb2;
+        is.exceptions(std::istream::eofbit);
+        bool threw = false;
+        try {
+            is >> &sb2;
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert( is.eof());
+        assert(!is.fail());
+    }
+    {
+        testbuf<wchar_t> sb(L" ");
+        std::basic_istream<wchar_t> is(&sb);
+        testbuf<wchar_t> sb2;
+        is.exceptions(std::istream::eofbit);
+        bool threw = false;
+        try {
+            is >> &sb2;
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert( is.eof());
+        assert(!is.fail());
+    }
 
-  return 0;
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        testbuf<char> sb2;
+        is.exceptions(std::istream::failbit);
+        bool threw = false;
+        try {
+            is >> &sb2;
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert( is.eof());
+        assert( is.fail());
+    }
+    {
+        testbuf<wchar_t> sb;
+        std::basic_istream<wchar_t> is(&sb);
+        testbuf<wchar_t> sb2;
+        is.exceptions(std::istream::failbit);
+        bool threw = false;
+        try {
+            is >> &sb2;
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert( is.eof());
+        assert( is.fail());
+    }
+
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::istream::failbit);
+        bool threw = false;
+        try {
+            is >> static_cast<testbuf<char>*>(0);
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert(!is.eof());
+        assert( is.fail());
+    }
+    {
+        testbuf<wchar_t> sb;
+        std::basic_istream<wchar_t> is(&sb);
+        is.exceptions(std::istream::failbit);
+        bool threw = false;
+        try {
+            is >> static_cast<testbuf<wchar_t>*>(0);
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert(!is.eof());
+        assert( is.fail());
+    }
+#endif
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream_extractors/unsigned_char.pass.cpp

@@ -13,6 +13,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -66,6 +67,44 @@ int main(int, char**)
         assert(!is.fail());
         assert(c == 'c');
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            unsigned char n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            unsigned char n = 0;
+            is >> n;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream_extractors/unsigned_char_pointer.pass.cpp

@@ -13,6 +13,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -103,6 +104,46 @@ int main(int, char**)
         assert(std::string((char*)s) == "");
     }
 #endif
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            unsigned char s[20];
+            is.width(10);
+            is >> s;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            unsigned char s[20];
+            is.width(10);
+            is >> s;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream_extractors/wchar_t_pointer.pass.cpp

@@ -13,6 +13,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -114,6 +115,84 @@ int main(int, char**)
         assert(std::string(s) == "");
     }
 #endif
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            char s[20];
+            is.width(10);
+            is >> s;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<wchar_t> sb;
+        std::wistream is(&sb);
+        is.exceptions(std::ios_base::failbit);
+
+        bool threw = false;
+        try {
+            wchar_t s[20];
+            is.width(10);
+            is >> s;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            char s[20];
+            is.width(10);
+            is >> s;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<wchar_t> sb;
+        std::wistream is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            wchar_t s[20];
+            is.width(10);
+            is >> s;
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.manip/ws.pass.cpp

@@ -14,6 +14,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -75,6 +76,42 @@ int main(int, char**)
         assert(is.eof());
         assert(is.fail());
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb("  ");
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            std::ws(is);
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(!is.fail());
+        assert( is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<wchar_t> sb(L"  ");
+        std::basic_istream<wchar_t> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            std::ws(is);
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(!is.fail());
+        assert( is.eof());
+        assert(threw);
+    }
+#endif
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.unformatted/get.pass.cpp

@@ -12,6 +12,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -96,6 +97,50 @@ int main(int, char**)
         assert(c == L'c');
         assert(is.gcount() == 1);
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb("rrrrrrrrr");
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            while (true) {
+                is.get();
+                if (is.eof())
+                    break;
+            }
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert( is.fail());
+        assert( is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<wchar_t> sb(L"rrrrrrrrr");
+        std::basic_istream<wchar_t> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            while (true) {
+                is.get();
+                if (is.eof())
+                    break;
+            }
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert( is.fail());
+        assert( is.eof());
+        assert(threw);
+    }
+#endif
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.unformatted/get_chart.pass.cpp

@@ -12,6 +12,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -99,6 +100,52 @@ int main(int, char**)
         assert(c == L'c');
         assert(is.gcount() == 1);
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb("rrrrrrrrr");
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            while (true) {
+                char c;
+                is.get(c);
+                if (is.eof())
+                    break;
+            }
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert( is.fail());
+        assert( is.eof());
+        assert(threw);
+    }
+    {
+        testbuf<wchar_t> sb(L"rrrrrrrrr");
+        std::basic_istream<wchar_t> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        bool threw = false;
+        try {
+            while (true) {
+                wchar_t c;
+                is.get(c);
+                if (is.eof())
+                    break;
+            }
+        } catch (std::ios_base::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert( is.fail());
+        assert( is.eof());
+        assert(threw);
+    }
+#endif
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.unformatted/get_pointer_size.pass.cpp

@@ -84,26 +84,6 @@ int main(int, char**)
         assert(std::string(s) == "");
         assert(is.gcount() == 0);
     }
-#ifndef TEST_HAS_NO_EXCEPTIONS
-    {
-        testbuf<char> sb(" ");
-        std::istream is(&sb);
-        char s[5] = "test";
-        is.exceptions(std::istream::eofbit | std::istream::badbit);
-        try
-        {
-            is.get(s, 5);
-            assert(false);
-        }
-        catch (std::ios_base::failure&)
-        {
-        }
-        assert( is.eof());
-        assert( is.fail());
-        assert(std::string(s) == " ");
-        assert(is.gcount() == 1);
-    }
-#endif
     {
         testbuf<wchar_t> sb(L"  \n    \n ");
         std::wistream is(&sb);
@@ -140,23 +120,78 @@ int main(int, char**)
     }
 #ifndef TEST_HAS_NO_EXCEPTIONS
     {
-        testbuf<wchar_t> sb(L" ");
-        std::wistream is(&sb);
-        wchar_t s[5] = L"test";
-        is.exceptions(std::wistream::eofbit | std::wistream::badbit);
-        try
-        {
+        testbuf<char> sb(" ");
+        std::basic_istream<char> is(&sb);
+        char s[5] = "test";
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
             is.get(s, 5);
-            assert(false);
-        }
-        catch (std::ios_base::failure&)
-        {
+        } catch (std::ios_base::failure&) {
+            threw = true;
         }
+        assert(!is.bad());
         assert( is.eof());
-        assert( is.fail());
+        assert(!is.fail());
+        assert(threw);
+        assert(std::string(s) == " ");
+        assert(is.gcount() == 1);
+    }
+    {
+        testbuf<wchar_t> sb(L" ");
+        std::basic_istream<wchar_t> is(&sb);
+        wchar_t s[5] = L"test";
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.get(s, 5);
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(!is.bad());
+        assert( is.eof());
+        assert(!is.fail());
+        assert(threw);
         assert(std::wstring(s) == L" ");
         assert(is.gcount() == 1);
     }
+
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        char s[5] = "test";
+        is.exceptions(std::ios_base::failbit);
+        bool threw = false;
+        try {
+            is.get(s, 5);
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(!is.bad());
+        assert( is.eof());
+        assert( is.fail());
+        assert(threw);
+        assert(std::basic_string<char>(s) == "");
+        assert(is.gcount() == 0);
+    }
+    {
+        testbuf<wchar_t> sb;
+        std::basic_istream<wchar_t> is(&sb);
+        wchar_t s[5] = L"test";
+        is.exceptions(std::ios_base::failbit);
+        bool threw = false;
+        try {
+            is.get(s, 5);
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(!is.bad());
+        assert( is.eof());
+        assert( is.fail());
+        assert(threw);
+        assert(std::basic_string<wchar_t>(s) == L"");
+        assert(is.gcount() == 0);
+    }
 #endif
 
   return 0;

libcxx/test/std/input.output/iostream.format/input.streams/istream.unformatted/get_pointer_size_chart.pass.cpp

@@ -84,26 +84,6 @@ int main(int, char**)
         assert(std::string(s) == "");
         assert(is.gcount() == 0);
     }
-#ifndef TEST_HAS_NO_EXCEPTIONS
-    {
-        testbuf<char> sb(" ");
-        std::istream is(&sb);
-        char s[5] = "test";
-        is.exceptions(std::istream::eofbit | std::istream::badbit);
-        try
-        {
-            is.get(s, 5, '*');
-            assert(false);
-        }
-        catch (std::ios_base::failure&)
-        {
-        }
-        assert( is.eof());
-        assert( is.fail());
-        assert(std::string(s) == " ");
-        assert(is.gcount() == 1);
-    }
-#endif
     {
         testbuf<wchar_t> sb(L"  *    * ");
         std::wistream is(&sb);
@@ -139,23 +119,78 @@ int main(int, char**)
         assert(is.gcount() == 0);
     }
 #ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb(" ");
+        std::basic_istream<char> is(&sb);
+        char s[5] = "test";
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.get(s, 5, '*');
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(!is.bad());
+        assert( is.eof());
+        assert(!is.fail());
+        assert(threw);
+        assert(std::basic_string<char>(s) == " ");
+        assert(is.gcount() == 1);
+    }
     {
         testbuf<wchar_t> sb(L" ");
-        std::wistream is(&sb);
+        std::basic_istream<wchar_t> is(&sb);
         wchar_t s[5] = L"test";
-        is.exceptions(std::wistream::eofbit | std::wistream::badbit);
-        try
-        {
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
             is.get(s, 5, L'*');
-            assert(false);
+        } catch (std::ios_base::failure&) {
+            threw = true;
         }
-        catch (std::ios_base::failure&)
-        {
+        assert(!is.bad());
+        assert( is.eof());
+        assert(!is.fail());
+        assert(threw);
+        assert(std::basic_string<wchar_t>(s) == L" ");
+        assert(is.gcount() == 1);
+    }
+
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        char s[5] = "test";
+        is.exceptions(std::ios_base::failbit);
+        bool threw = false;
+        try {
+            is.get(s, 5, '*');
+        } catch (std::ios_base::failure&) {
+            threw = true;
         }
+        assert(!is.bad());
         assert( is.eof());
         assert( is.fail());
-        assert(std::wstring(s) == L" ");
-        assert(is.gcount() == 1);
+        assert(threw);
+        assert(std::basic_string<char>(s) == "");
+        assert(is.gcount() == 0);
+    }
+    {
+        testbuf<wchar_t> sb;
+        std::basic_istream<wchar_t> is(&sb);
+        wchar_t s[5] = L"test";
+        is.exceptions(std::ios_base::failbit);
+        bool threw = false;
+        try {
+            is.get(s, 5, L'*');
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(!is.bad());
+        assert( is.eof());
+        assert( is.fail());
+        assert(threw);
+        assert(std::basic_string<wchar_t>(s) == L"");
+        assert(is.gcount() == 0);
     }
 #endif
 

libcxx/test/std/input.output/iostream.format/input.streams/istream.unformatted/get_streambuf.pass.cpp

@@ -13,6 +13,8 @@
 #include <istream>
 #include <cassert>
 
+#include "test_macros.h"
+
 template <class CharT>
 class testbuf
     : public std::basic_streambuf<CharT>
@@ -84,6 +86,73 @@ int main(int, char**)
         assert(!is.fail());
         assert(is.gcount() == 3);
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb(" ");
+        std::basic_istream<char> is(&sb);
+        testbuf<char> sb2;
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.get(sb2);
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert( is.eof());
+        assert(!is.fail());
+    }
+    {
+        testbuf<wchar_t> sb(L" ");
+        std::basic_istream<wchar_t> is(&sb);
+        testbuf<wchar_t> sb2;
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.get(sb2);
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert( is.eof());
+        assert(!is.fail());
+    }
 
-  return 0;
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        testbuf<char> sb2;
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.get(sb2);
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert( is.eof());
+        assert( is.fail());
+    }
+    {
+        testbuf<wchar_t> sb;
+        std::basic_istream<wchar_t> is(&sb);
+        testbuf<wchar_t> sb2;
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.get(sb2);
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert( is.eof());
+        assert( is.fail());
+    }
+#endif
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.unformatted/get_streambuf_chart.pass.cpp

@@ -13,6 +13,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 class testbuf
@@ -85,6 +86,73 @@ int main(int, char**)
         assert(!is.fail());
         assert(is.gcount() == 3);
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb(" ");
+        std::basic_istream<char> is(&sb);
+        testbuf<char> sb2;
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.get(sb2, '*');
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert( is.eof());
+        assert(!is.fail());
+    }
+    {
+        testbuf<wchar_t> sb(L" ");
+        std::basic_istream<wchar_t> is(&sb);
+        testbuf<wchar_t> sb2;
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.get(sb2, L'*');
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert( is.eof());
+        assert(!is.fail());
+    }
 
-  return 0;
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        testbuf<char> sb2;
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.get(sb2, '*');
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert( is.eof());
+        assert( is.fail());
+    }
+    {
+        testbuf<wchar_t> sb;
+        std::basic_istream<wchar_t> is(&sb);
+        testbuf<wchar_t> sb2;
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.get(sb2, L'*');
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert( is.eof());
+        assert( is.fail());
+    }
+#endif
+
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.unformatted/getline_pointer_size.pass.cpp

@@ -76,26 +76,6 @@ int main(int, char**)
         assert(std::string(s) == "");
         assert(is.gcount() == 0);
     }
-#ifndef TEST_HAS_NO_EXCEPTIONS
-    {
-        testbuf<char> sb(" ");
-        std::istream is(&sb);
-        char s[5] = "test";
-        is.exceptions(std::istream::eofbit | std::istream::badbit);
-        try
-        {
-            is.getline(s, 5);
-            assert(false);
-        }
-        catch (std::ios_base::failure&)
-        {
-        }
-        assert( is.eof());
-        assert( is.fail());
-        assert(std::string(s) == " ");
-        assert(is.gcount() == 1);
-    }
-#endif
     {
         testbuf<wchar_t> sb(L"  \n    \n ");
         std::wistream is(&sb);
@@ -124,22 +104,77 @@ int main(int, char**)
     }
 #ifndef TEST_HAS_NO_EXCEPTIONS
     {
-        testbuf<wchar_t> sb(L" ");
-        std::wistream is(&sb);
-        wchar_t s[5] = L"test";
-        is.exceptions(std::wistream::eofbit | std::wistream::badbit);
-        try
-        {
+        testbuf<char> sb(" ");
+        std::basic_istream<char> is(&sb);
+        char s[5] = "test";
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
             is.getline(s, 5);
-            assert(false);
+        } catch (std::ios_base::failure&) {
+            threw = true;
         }
-        catch (std::ios_base::failure&)
-        {
+        assert(!is.bad());
+        assert( is.eof());
+        assert(!is.fail());
+        assert(threw);
+        assert(std::basic_string<char>(s) == " ");
+        assert(is.gcount() == 1);
+    }
+    {
+        testbuf<wchar_t> sb(L" ");
+        std::basic_istream<wchar_t> is(&sb);
+        wchar_t s[5] = L"test";
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.getline(s, 5);
+        } catch (std::ios_base::failure&) {
+            threw = true;
         }
+        assert(!is.bad());
+        assert( is.eof());
+        assert(!is.fail());
+        assert(threw);
+        assert(std::basic_string<wchar_t>(s) == L" ");
+        assert(is.gcount() == 1);
+    }
+
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        char s[5] = "test";
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.getline(s, 5);
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(!is.bad());
         assert( is.eof());
         assert( is.fail());
-        assert(std::wstring(s) == L" ");
-        assert(is.gcount() == 1);
+        assert(threw);
+        assert(std::basic_string<char>(s) == "");
+        assert(is.gcount() == 0);
+    }
+    {
+        testbuf<wchar_t> sb;
+        std::basic_istream<wchar_t> is(&sb);
+        wchar_t s[5] = L"test";
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.getline(s, 5);
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(!is.bad());
+        assert( is.eof());
+        assert( is.fail());
+        assert(threw);
+        assert(std::basic_string<wchar_t>(s) == L"");
+        assert(is.gcount() == 0);
     }
 #endif
 

libcxx/test/std/input.output/iostream.format/input.streams/istream.unformatted/getline_pointer_size_chart.pass.cpp

@@ -76,26 +76,6 @@ int main(int, char**)
         assert(std::string(s) == "");
         assert(is.gcount() == 0);
     }
-#ifndef TEST_HAS_NO_EXCEPTIONS
-    {
-        testbuf<char> sb(" ");
-        std::istream is(&sb);
-        char s[5] = "test";
-        is.exceptions(std::istream::eofbit | std::istream::badbit);
-        try
-        {
-            is.getline(s, 5, '*');
-            assert(false);
-        }
-        catch (std::ios_base::failure&)
-        {
-        }
-        assert( is.eof());
-        assert( is.fail());
-        assert(std::string(s) == " ");
-        assert(is.gcount() == 1);
-    }
-#endif
     {
         testbuf<wchar_t> sb(L"  *    * ");
         std::wistream is(&sb);
@@ -123,23 +103,78 @@ int main(int, char**)
         assert(is.gcount() == 0);
     }
 #ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb(" ");
+        std::basic_istream<char> is(&sb);
+        char s[5] = "test";
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.getline(s, 5, '*');
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(!is.bad());
+        assert( is.eof());
+        assert(!is.fail());
+        assert(threw);
+        assert(std::basic_string<char>(s) == " ");
+        assert(is.gcount() == 1);
+    }
     {
         testbuf<wchar_t> sb(L" ");
-        std::wistream is(&sb);
+        std::basic_istream<wchar_t> is(&sb);
         wchar_t s[5] = L"test";
-        is.exceptions(std::wistream::eofbit | std::wistream::badbit);
-        try
-        {
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
             is.getline(s, 5, L'*');
-            assert(false);
+        } catch (std::ios_base::failure&) {
+            threw = true;
         }
-        catch (std::ios_base::failure&)
-        {
+        assert(!is.bad());
+        assert( is.eof());
+        assert(!is.fail());
+        assert(threw);
+        assert(std::basic_string<wchar_t>(s) == L" ");
+        assert(is.gcount() == 1);
+    }
+
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        char s[5] = "test";
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.getline(s, 5, '*');
+        } catch (std::ios_base::failure&) {
+            threw = true;
         }
+        assert(!is.bad());
         assert( is.eof());
         assert( is.fail());
-        assert(std::wstring(s) == L" ");
-        assert(is.gcount() == 1);
+        assert(threw);
+        assert(std::basic_string<char>(s) == "");
+        assert(is.gcount() == 0);
+    }
+    {
+        testbuf<wchar_t> sb;
+        std::basic_istream<wchar_t> is(&sb);
+        wchar_t s[5] = L"test";
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.getline(s, 5, L'*');
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(!is.bad());
+        assert( is.eof());
+        assert( is.fail());
+        assert(threw);
+        assert(std::basic_string<wchar_t>(s) == L"");
+        assert(is.gcount() == 0);
     }
 #endif
 

libcxx/test/std/input.output/iostream.format/input.streams/istream.unformatted/ignore.pass.cpp

@@ -14,6 +14,8 @@
 #include <istream>
 #include <cassert>
 
+#include "test_macros.h"
+
 template <class CharT>
 struct testbuf
     : public std::basic_streambuf<CharT>
@@ -72,6 +74,38 @@ int main(int, char**)
         assert(!is.fail());
         assert(is.gcount() == 6);
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb(" ");
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.ignore(5);
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert( is.eof());
+        assert(!is.fail());
+    }
+    {
+        testbuf<wchar_t> sb(L" ");
+        std::basic_istream<wchar_t> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.ignore(5);
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert( is.eof());
+        assert(!is.fail());
+    }
+#endif
 
-  return 0;
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.unformatted/peek.pass.cpp

@@ -12,6 +12,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -65,6 +66,38 @@ int main(int, char**)
         assert(!is.fail());
         assert(is.gcount() == 0);
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.peek();
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert( is.eof());
+        assert(!is.fail());
+    }
+    {
+        testbuf<wchar_t> sb;
+        std::basic_istream<wchar_t> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+        bool threw = false;
+        try {
+            is.peek();
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert( is.eof());
+        assert(!is.fail());
+    }
+#endif
 
-  return 0;
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.unformatted/putback.pass.cpp

@@ -13,6 +13,8 @@
 #include <istream>
 #include <cassert>
 
+#include "test_macros.h"
+
 template <class CharT>
 struct testbuf
     : public std::basic_streambuf<CharT>
@@ -85,6 +87,38 @@ int main(int, char**)
         assert(is.bad());
         assert(is.gcount() == 0);
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::badbit);
+        bool threw = false;
+        try {
+            is.putback('x');
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert( is.bad());
+        assert(!is.eof());
+        assert( is.fail());
+    }
+    {
+        testbuf<wchar_t> sb;
+        std::basic_istream<wchar_t> is(&sb);
+        is.exceptions(std::ios_base::badbit);
+        bool threw = false;
+        try {
+            is.putback(L'x');
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert( is.bad());
+        assert(!is.eof());
+        assert( is.fail());
+    }
+#endif
 
-  return 0;
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.unformatted/read.pass.cpp

@@ -12,6 +12,7 @@
 
 #include <istream>
 #include <cassert>
+#include "test_macros.h"
 
 template <class CharT>
 struct testbuf
@@ -77,6 +78,40 @@ int main(int, char**)
         assert( is.fail());
         assert(is.gcount() == 0);
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+        char s[10];
+        bool threw = false;
+        try {
+            is.read(s, 5);
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert( is.eof());
+        assert( is.fail());
+    }
+    {
+        testbuf<wchar_t> sb;
+        std::basic_istream<wchar_t> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+        wchar_t s[10];
+        bool threw = false;
+        try {
+            is.read(s, 5);
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert(!is.bad());
+        assert( is.eof());
+        assert( is.fail());
+    }
+#endif
 
-  return 0;
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.unformatted/sync.pass.cpp

@@ -13,6 +13,8 @@
 #include <istream>
 #include <cassert>
 
+#include "test_macros.h"
+
 int sync_called = 0;
 
 template <class CharT>
@@ -46,6 +48,41 @@ protected:
     }
 };
 
+#ifndef TEST_HAS_NO_EXCEPTIONS
+struct testbuf_exception { };
+
+template <class CharT>
+struct throwing_testbuf
+    : public std::basic_streambuf<CharT>
+{
+    typedef std::basic_string<CharT> string_type;
+    typedef std::basic_streambuf<CharT> base;
+private:
+    string_type str_;
+public:
+
+    throwing_testbuf() {}
+    throwing_testbuf(const string_type& str)
+        : str_(str)
+    {
+        base::setg(const_cast<CharT*>(str_.data()),
+                   const_cast<CharT*>(str_.data()),
+                   const_cast<CharT*>(str_.data()) + str_.size());
+    }
+
+    CharT* eback() const {return base::eback();}
+    CharT* gptr() const {return base::gptr();}
+    CharT* egptr() const {return base::egptr();}
+
+protected:
+    virtual int sync()
+    {
+        throw testbuf_exception();
+        return 5;
+    }
+};
+#endif // TEST_HAS_NO_EXCEPTIONS
+
 int main(int, char**)
 {
     {
@@ -60,6 +97,36 @@ int main(int, char**)
         assert(is.sync() == 0);
         assert(sync_called == 2);
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        throwing_testbuf<char> sb(" 123456789");
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::badbit);
+        bool threw = false;
+        try {
+            is.sync();
+        } catch (testbuf_exception const&) {
+            threw = true;
+        }
+        assert( is.bad());
+        assert(!is.eof());
+        assert( is.fail());
+    }
+    {
+        throwing_testbuf<wchar_t> sb(L" 123456789");
+        std::basic_istream<wchar_t> is(&sb);
+        is.exceptions(std::ios_base::badbit);
+        bool threw = false;
+        try {
+            is.sync();
+        } catch (testbuf_exception const&) {
+            threw = true;
+        }
+        assert( is.bad());
+        assert(!is.eof());
+        assert( is.fail());
+    }
+#endif
 
-  return 0;
+    return 0;
 }

libcxx/test/std/input.output/iostream.format/input.streams/istream.unformatted/unget.pass.cpp

@@ -13,6 +13,8 @@
 #include <istream>
 #include <cassert>
 
+#include "test_macros.h"
+
 template <class CharT>
 struct testbuf
     : public std::basic_streambuf<CharT>
@@ -77,6 +79,38 @@ int main(int, char**)
         assert(is.bad());
         assert(is.gcount() == 0);
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        testbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::badbit);
+        bool threw = false;
+        try {
+            is.unget();
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert( is.bad());
+        assert(!is.eof());
+        assert( is.fail());
+    }
+    {
+        testbuf<wchar_t> sb;
+        std::basic_istream<wchar_t> is(&sb);
+        is.exceptions(std::ios_base::badbit);
+        bool threw = false;
+        try {
+            is.unget();
+        } catch (std::ios_base::failure&) {
+            threw = true;
+        }
+        assert(threw);
+        assert( is.bad());
+        assert(!is.eof());
+        assert( is.fail());
+    }
+#endif
 
-  return 0;
+    return 0;
 }

libcxx/test/std/strings/basic.string/string.nonmembers/string.io/get_line.pass.cpp

@@ -18,6 +18,7 @@
 #include <cassert>
 
 #include "min_allocator.h"
+#include "test_macros.h"
 
 int main(int, char**)
 {
@@ -77,6 +78,85 @@ int main(int, char**)
         assert(s == L"   ghij");
     }
 #endif
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        std::basic_stringbuf<char> sb("hello");
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
 
-  return 0;
+        std::basic_string<char> s;
+        bool threw = false;
+        try {
+            std::getline(is, s);
+        } catch (std::ios::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(!is.fail());
+        assert( is.eof());
+        assert(threw);
+        assert(s == "hello");
+    }
+    {
+        std::basic_stringbuf<wchar_t> sb(L"hello");
+        std::basic_istream<wchar_t> is(&sb);
+        is.exceptions(std::ios_base::eofbit);
+
+        std::basic_string<wchar_t> s;
+        bool threw = false;
+        try {
+            std::getline(is, s);
+        } catch (std::ios::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(!is.fail());
+        assert( is.eof());
+        assert(threw);
+        assert(s == L"hello");
+    }
+
+    {
+        std::basic_stringbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios_base::failbit);
+
+        std::basic_string<char> s;
+        bool threw = false;
+        try {
+            std::getline(is, s);
+        } catch (std::ios::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert( is.fail());
+        assert( is.eof());
+        assert(threw);
+        assert(s == "");
+    }
+    {
+        std::basic_stringbuf<wchar_t> sb;
+        std::basic_istream<wchar_t> is(&sb);
+        is.exceptions(std::ios_base::failbit);
+
+        std::basic_string<wchar_t> s;
+        bool threw = false;
+        try {
+            std::getline(is, s);
+        } catch (std::ios::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert( is.fail());
+        assert( is.eof());
+        assert(threw);
+        assert(s == L"");
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/strings/basic.string/string.nonmembers/string.io/get_line_delim.pass.cpp

@@ -18,6 +18,7 @@
 #include <cassert>
 
 #include "min_allocator.h"
+#include "test_macros.h"
 
 int main(int, char**)
 {
@@ -89,6 +90,84 @@ int main(int, char**)
         assert(s == L"   ghij");
     }
 #endif
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        std::basic_stringbuf<char> sb("hello");
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios::eofbit);
 
-  return 0;
+        std::basic_string<char> s;
+        bool threw = false;
+        try {
+            std::getline(is, s, '\n');
+        } catch (std::ios::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(!is.fail());
+        assert( is.eof());
+        assert(threw);
+        assert(s == "hello");
+    }
+    {
+        std::basic_stringbuf<wchar_t> sb(L"hello");
+        std::basic_istream<wchar_t> is(&sb);
+        is.exceptions(std::ios::eofbit);
+
+        std::basic_string<wchar_t> s;
+        bool threw = false;
+        try {
+            std::getline(is, s, L'\n');
+        } catch (std::ios::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(!is.fail());
+        assert( is.eof());
+        assert(threw);
+        assert(s == L"hello");
+    }
+    {
+        std::basic_stringbuf<char> sb;
+        std::basic_istream<char> is(&sb);
+        is.exceptions(std::ios::failbit);
+
+        std::basic_string<char> s;
+        bool threw = false;
+        try {
+            std::getline(is, s, '\n');
+        } catch (std::ios::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert( is.fail());
+        assert( is.eof());
+        assert(threw);
+        assert(s == "");
+    }
+    {
+        std::basic_stringbuf<wchar_t> sb;
+        std::basic_istream<wchar_t> is(&sb);
+        is.exceptions(std::ios::failbit);
+
+        std::basic_string<wchar_t> s;
+        bool threw = false;
+        try {
+            std::getline(is, s, L'\n');
+        } catch (std::ios::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert( is.fail());
+        assert( is.eof());
+        assert(threw);
+        assert(s == L"");
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/strings/basic.string/string.nonmembers/string.io/stream_extract.pass.cpp

@@ -18,6 +18,7 @@
 #include <cassert>
 
 #include "min_allocator.h"
+#include "test_macros.h"
 
 int main(int, char**)
 {
@@ -65,6 +66,44 @@ int main(int, char**)
         in >> s;
         assert(in.fail());
     }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        std::stringbuf sb;
+        std::istream is(&sb);
+        is.exceptions(std::ios::failbit);
+
+        bool threw = false;
+        try {
+            std::string s;
+            is >> s;
+        } catch (std::ios::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        std::stringbuf sb;
+        std::istream is(&sb);
+        is.exceptions(std::ios::eofbit);
+
+        bool threw = false;
+        try {
+            std::string s;
+            is >> s;
+        } catch (std::ios::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
 #if TEST_STD_VER >= 11
     {
         typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;

libcxx/test/std/utilities/template.bitset/bitset.operators/stream_in.pass.cpp

@@ -9,19 +9,60 @@
 // test:
 
 // template <class charT, class traits, size_t N>
-// basic_ostream<charT, traits>&
-// operator<<(basic_ostream<charT, traits>& os, const bitset<N>& x);
+// basic_istream<charT, traits>&
+// operator>>(basic_istream<charT, traits>& is, bitset<N>& x);
 
 #include <bitset>
 #include <sstream>
 #include <cassert>
+#include "test_macros.h"
 
 int main(int, char**)
 {
-    std::istringstream in("01011010");
-    std::bitset<8> b;
-    in >> b;
-    assert(b.to_ulong() == 0x5A);
+    {
+        std::istringstream in("01011010");
+        std::bitset<8> b;
+        in >> b;
+        assert(b.to_ulong() == 0x5A);
+    }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    {
+        std::stringbuf sb;
+        std::istream is(&sb);
+        is.exceptions(std::ios::failbit);
 
-  return 0;
+        bool threw = false;
+        try {
+            std::bitset<8> b;
+            is >> b;
+        } catch (std::ios::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+    {
+        std::stringbuf sb;
+        std::istream is(&sb);
+        is.exceptions(std::ios::eofbit);
+
+        bool threw = false;
+        try {
+            std::bitset<8> b;
+            is >> b;
+        } catch (std::ios::failure const&) {
+            threw = true;
+        }
+
+        assert(!is.bad());
+        assert(is.fail());
+        assert(is.eof());
+        assert(threw);
+    }
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+    return 0;
 }

libcxx/test/std/utilities/template.bitset/bitset.operators/stream_out.pass.cpp

@@ -9,8 +9,8 @@
 // test:
 
 // template <class charT, class traits, size_t N>
-// basic_istream<charT, traits>&
-// operator>>(basic_istream<charT, traits>& is, bitset<N>& x);
+// basic_ostream<charT, traits>&
+// operator<<(basic_ostream<charT, traits>& os, const bitset<N>& x);
 
 #include <bitset>
 #include <sstream>