[clang] [clang][Dependency Scanning] Fix the In-Memory Buffer Used for By-Name Scanning (PR #183396)

[Jan Svoboda via cfe-commits]

https://github.com/jansvoboda11 commented:

Can you explain the source location overflow mentioned in the PR description? IIRC you said that Clang handles source locations pointing past the end of the main input buffer fine.

https://github.com/llvm/llvm-project/pull/183396