After this change (commit b0c033bf3fae810b9e5a5c69f17bd4de63725691), the Git
for Windows setup (and future Cygwin setups) do not correctly configure bash
features because the post-install step for configuring the /dev directory does
not work any more. It used to be that "mkdir -m 755 /dev" would succeed, but
now it returns a "File exists" error, after which attempts to create the 'shm'
and 'mqueue' directories fail and the /dev/fd, /dev/std{in,out,err} links are
not created. This causes some bash features to not work. The fix (validated on
Git for Windows) would be for setups to pre-create this directory outside of
the Cygwin environment before running the post-install steps.
See https://github.com/git-for-windows/git/issues/2291#issuecomment-524433693
for the in-depth analysis. Note, this is not a current issue in Cygwin, but is
believed to become a FUTURE issue with the next release.
Thanks,
Stephen
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