VM

Comment 3 for bug 987549

Revision history for this message
Uday Reddy (reddyuday) wrote : [Bug 987549] Re: vm-pipe-message-to-command gives: Command 'foo' produced no output

It looks like the "produced no output" message was introduced in revision
454, way back when. See vm-save.el. It is likely that it didn't fire due
to some other bug and, when that was fixed, it started firing again.

In any case, why should this message be blocked?

Cheers,
Uday