xazax.hun added a comment.

In http://reviews.llvm.org/D12906#248418, @honggyu.kim wrote:

> (3) bug type (bug message)


As far as I remember the other version of this patch exclude any message that 
is displayed to the user deliberately, to make the hash more resilient to 
changes to those strings. As always, there is a trade off here, and in order to 
decide we need to have the exact scope of the hash. If we expect to only 
compare hashes that was generated with the same version of clang, it is great 
to include that in the hash. If we want to compare hashes that was generated by 
different versions of clang, this might not be a good idea, depending on how 
often are those messages changes. The original patch included the check_name in 
the hash. Unfortunately that might change too.


http://reviews.llvm.org/D12906



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