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

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Alan Mackenzie <acm <at> muc.de>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#40992: closed (27.0.90; Evaluating a function while using
 edebug breaks)
Date: Sun, 03 May 2020 12:14:02 +0000

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Your message dated Sun, 3 May 2020 12:13:31 +0000
with message-id <20200503121331.GD5721 <at> ACM>
and subject line Re: bug#40992: 27.0.90; Evaluating a function while using edebug breaks
has caused the debbugs.gnu.org bug report #40992,
regarding 27.0.90; Evaluating a function while using edebug breaks
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


-- 
40992: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=40992
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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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.

[Message part 3 (message/rfc822, inline)]

From: Alan Mackenzie <acm <at> muc.de>
To: 40992-done <at> debbugs.gnu.org
Subject: Re: bug#40992: 27.0.90; Evaluating a function while using edebug
 breaks
Date: Sun, 3 May 2020 12:13:31 +0000

Bug fixed in the emacs-27 branch by reverting commit

commit e8b3a15cb6ff187ce08afcb43bd9a0b7907268ca
Author: Lars Ingebrigtsen <larsi <at> gnus.org>
Date:   Sun Oct 20 12:07:42 2019 +0200

    Mark breakpoints in edebug with highlights

    * lisp/emacs-lisp/edebug.el (edebug--overlay-breakpoints)
    (edebug--overlay-breakpoints-remove): New functions (bug#23468).
    (edebug-modify-breakpoint): Use them to highlight breakpoints.
    (edebug--display-1): Restore breakpoint highlights.
    (edebug--recursive-edit): Remove highlights on exit.

-- 
Alan Mackenzie (Nuremberg, Germany).

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