pub fn report_failed_child(what: &str, e: &Error)Expand description
Report a child that could not be started, and hold the screen while it is read.
The caller has already left the alternate screen, so this lands where the
child would have drawn, and the pause is what stops resume() wiping it.
Without this the whole failure was invisible: the picker suspended, the
child never ran, the picker resumed, and the only evidence was a flicker.
Written to /dev/tty, never to stdout. Everything else in this file is
printed by a CHILD, whose stdout act_child has already pointed at the
terminal. This one runs in the PICKER, whose stdout carries exactly one
thing, the chosen pane id. Printing it cost the first attempt at this fix:
the report went down the pipe to whoever called the picker, the screen
stayed blank, and the test caught it.