GNU bug report logs - #40992
27.0.90; Evaluating a function while using edebug breaks

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Package: emacs;

Reported by: Phillip Lord <phillip.lord <at> russet.org.uk>

Date: Fri, 1 May 2020 08:30:02 UTC

Severity: normal

Found in version 27.0.90

Done: Alan Mackenzie <acm <at> muc.de>

Bug is archived. No further changes may be made.

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Phillip Lord <phillip.lord <at> russet.org.uk>
To: bug-gnu-emacs <at> gnu.org
Subject: 27.0.90; Evaluating a function while using edebug breaks
Date: Fri, 01 May 2020 09:26:44 +0100


Edebug fails while tracing a function, if that function is evaluated
during the edebug session. The error reported is:

Wrong type argument: listp, #<marker at 4045 in hanoi.el>
edebug--display-1: Wrong type argument: listp, #<marker at 4045 in hanoi.el>

This is a regression as it works in Emacs-26, but fails in Emacs-27.

Reproduction:

In clean emacs -q

M-x hanoi
jump to hanoi function
C-u C-M-x
M-x hanoi

After stepping through into hanoi with point still in

C-M-x

and step once more.


I use this workflow quite a lot when debugging. I may start to debug a
function, decided I have seen enough, to un-instrument so I don't see it
debugged again.
This bug report was last modified 5 years and 8 days ago.

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