[PATCH] D68164: [Commandline] Clear error on raw_ostream when there is parsing error.

[Fangrui Song via Phabricator via llvm-commits]

MaskRay added a comment.

POSIX has stated that file descriptors 0, 1 or 2 should not be closed. The is stated in many parts, e.g.

> Applications should not execute programs with file descriptor 0 not open for reading or with file descriptor 1 or 2 not open for writing, as this might cause the executed program to misbehave.  In order not to pass on these file descriptors to an executed program, applications should not just close them but should reopen them on, for example, /dev/null.

The change is justified if you can give an example of a different file descriptor.


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  https://reviews.llvm.org/D68164/new/

https://reviews.llvm.org/D68164