ioeric added inline comments.

================
Comment at: lib/Tooling/Tooling.cpp:419
-  } else {
-    llvm::report_fatal_error("Cannot detect current path: " +
-                             Twine(CWD.getError().message()));
----------------
ilya-biryukov wrote:
> ioeric wrote:
> > Should we still check if `CWD` is correctly set?
> Not sure we know which CWD is correct at this point. Do you mean to check 
> that `getCurrentWorkingDirectory ` does not return an error?
Yes. 

Actually, after a closer look, I noticed `getAbsolutePath` below is just using 
the current working directory in real file system, which seems wrong. This is 
pre-existing but would be nice to fix since we are here :)


Repository:
  rC Clang

https://reviews.llvm.org/D51407



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