bug#30350: 27.0.50; Newest master can't run processes on macOS

[Philipp Stephani]

Philipp <p.stephani2@gmail.com> schrieb am So., 4. Feb. 2018 um 21:17 Uhr:

For some reason the newest master can't seem to start subprocesses on
macOS:

emacs -batch -Q --eval='(call-process "/usr/bin/true")'
Searching for program: Is a directory, /usr/bin/true

Needless to say, /usr/bin/true is a regular file.

According to 'git bisect', the problematic commit is

commit 327d251f8a857350a78029c31c7ab3f9797cc727

Author: Paul Eggert <eggert@cs.ucla.edu>

Date:   Sat Feb 3 12:10:19 2018 -0800

    Avoid EOVERFLOW problems with file-directory-p