[llvm-dev] Possible UB in reading coverage mapping with compressed function names

Igor Kudrin via llvm-dev llvm-dev at lists.llvm.org
Mon Apr 18 20:12:41 PDT 2016

Hi David, Vedant,

It looks like we might have UB somewhere connected with reading coverage 
mapping serialized in v2 format (with compressed function names).

I committed my patch, r266436, using the current format for .covmapping 
file, and then buildbots complained about it:

I tried to reproduce the issue locally, but didn't succeed. Anyway, I've 
reapplied my patch (r266620) using the old format
for .covmapping, and buildbots are happy now.

Could you take a look on that? Do you have any idea what might cause the 

Best regards,
Igor Kudrin

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