There was some recent discussion on the vim_dev list of a failure to update a Vim package which was found to be due to an update of grep from 2.25 to 2.26. The details of the grep behavior are discussed here:
https://www.linuxquestions.org/questions/slackware-14/pkgtools-grep-bug-in-slackware[64]-current-4175593054/ In short, it seems to be due to the "grep: /dev/null output speedup" commit of 2016-05-01, af6af288eac28951b5eee1eaaf373e22b2193b7b. When grep terminates early, it closes the pipe it's reading stdin from, which terminates the program on the other side of that pipe early, before that program has completed its task. Oops. Regards, Gary
