Jan Svoboda f0691bcdf9 [clang][lex] Fix non-portability diagnostics with absolute path (#74782) ...

The existing code incorrectly assumes that `Path` can be empty. It
can't, it always contains at least `<` or `"`. On Unix, this patch fixes
an incorrect diagnostics that instead of `"/Users/blah"` suggested
`"Userss/blah"`. In assert builds, this would outright crash.

This patch also fixes a bug on Windows that would prevent the diagnostic
being triggered due to separator mismatch.

rdar://91172342

2023-12-18 12:11:27 -08:00

136 KiB

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