Exclude RedirectingFileSystem with null OverlayFileDir in VFSUsage #10116
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This is to avoid assertion failures like the following when RedirectingFileSystem's are created and used outside createVFSFromOverlayFiles. ``` Assertion failed: VFSUsage.size() == getHeaderSearchOpts().VFSOverlayFiles.size() && "A different number of RedirectingFileSystem's were present than " "-ivfsoverlay options passed to Clang!", file S:\SourceCache\llvm-project\clang\lib\Lex\HeaderSearch.cpp, line 162 ``` Cherrypick commit llvm#128267
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@swift-ci please test |
compnerd
approved these changes
Feb 25, 2025
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This is to avoid assertion failures like the following when RedirectingFileSystem's are created and used outside createVFSFromOverlayFiles.
Cherrypick commit llvm#128267