Ben Dunbobbin 7ab6bc066c [ThinLTO] Preserve Unicode characters in module paths when writing the combined-index (#194320) ...

`IndexBitcodeWriter::writeModStrings()` serializes module path strings
into a `SmallVector<unsigned>` before emitting `MST_CODE_ENTRY` records.
When a path contains UTF-8 bytes with the high bit set, appending from
`StringRef::begin()/end()` can be incorrect. Instead, append the module
path through `bytes_begin()/bytes_end()`, so the bitcode writer always
serializes unsigned bytes.

Fixes: https://github.com/llvm/llvm-project/issues/194318 (#194318)

Based on work by @kbelochapka and @romanova-ekaterina.

2026-04-29 09:11:41 +01:00

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