4da2b542b1
`EvaluateExpression` does not always create a new persistent result. If the expression is a bare persistent variable, then a new persistent result is not created. This means the caller can't assume a new persistent result is created for each evaluation. However, `dwim-print` was doing exactly that: assuming a new persistent result for each evaluation. This resulted in a bug: ``` (lldb) p int $j = 23 (lldb) p $j (lldb) p $j ``` The first `p $j` would not create a persistent result, and so `dwim-print` would inadvertently delete `$j`. The second `p $j` would fail. The fix is to try `expr` as a persistent variable, after trying `expr` as a frame variable. For persistent variables, this avoids calling `EvaluateExpression`. Resolves https://github.com/llvm/llvm-project/issues/84806 rdar://124688427
The LLVM Compiler Infrastructure
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