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7371ec7629
It can be tricky to troubleshoot why the crashlog script can't show inline sources. The two most common causes are that we couldn't find the dSYM or, if we find the dSYM, that the path remapping included in the dSYMForUUID output isn't accessible. The former is already easy to diagnose, but the latter is harder because you'd have to manually invoke dsymForUUID on the UUID and check the remapped path. This patch automates that process and prints a warning if the remapped path doesn't exist or is not accessible. Differential revision: https://reviews.llvm.org/D152886