[PATCH] D116750: [clang][lex] Keep references to `DirectoryLookup` objects up-to-date

[Carlos Galvez via Phabricator via cfe-commits]

carlosgalvezp added a comment.

Hi @jansvoboda11 !

I believe this commit is the root cause of this issue: https://github.com/llvm/llvm-project/issues/53161

Believe it or not, I was lucky enough to run into it. I have bisected the repo and my tests indicate that this commit is the offender. Do you have any obvious idea what could be the problem?

To summarize, clang cannot find /usr/include only if I include exactly 511 directories via `-I`. If I include 510 or 512, then it works fine. I will test if the same happens with smaller powers of two. I have a test script that I can share if you want to test it yourself.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D116750/new/

https://reviews.llvm.org/D116750