[PATCH] D121423: [VFS] OverlayFileSystem should consistently use the last-added FS first

[Ben Barham via Phabricator via llvm-commits]

bnbarham updated this revision to Diff 414733.
bnbarham added a comment.

Fix failing test

Adds an error to InMemoryFileSystem if attempting to set an empty CWD when no CWD has been set.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D121423/new/

https://reviews.llvm.org/D121423

Files:
  llvm/include/llvm/Support/VirtualFileSystem.h
  llvm/lib/Support/VirtualFileSystem.cpp
  llvm/unittests/Support/VirtualFileSystemTest.cpp

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