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bug#40323: 28.0.50; error in process filter: Invalid search bound (wrong
From: |
Noam Postavsky |
Subject: |
bug#40323: 28.0.50; error in process filter: Invalid search bound (wrong side of point) |
Date: |
Mon, 20 Apr 2020 22:29:54 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.3 (windows-nt) |
Jacob Lagares Pozo <jlagarespo@iebesalu.cat> writes:
> I should probably make a simple program that prints a bunch of stuff
> and then hangs, so I can have predictable and reproducible output,
> that might help.
It occurs to me that you should see a "non-local exit" in the trace when
the error triggers, and the traces just before that should hopefully
show the swapping of marker positions occuring.
> So what do you exactly mean by that the process is ending normally?
Oh, hmm, I was still a bit confused. I thought the (:comint-pmark nil)
meant the marker was deleted, but actually it's just because around the
call to comint-output-filter a different buffer is current (which makes
the check in the tracing function fail). Maybe one more tweak to the
tracing function:
(defun bug-40323-get-comint-output-marker ()
(list :comint-pmark
(let ((buf (and (markerp comint-last-output-start)
(marker-buffer comint-last-output-start))))
(when (buffer-live-p buf)
(cons
comint-last-output-start
(process-mark (get-buffer-process buf)))))))