GNU bug report logs - #17168
24.3.50; Segfault at mark_object

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Package: emacs;

Reported by: Nicolas Richard <theonewiththeevillook <at> yahoo.fr>

Date: Wed, 2 Apr 2014 07:45:05 UTC

Severity: important

Tags: moreinfo

Merged with 15583, 15688, 15719, 15972, 16278, 16521, 17167, 17184

Found in version 24.3.50

Done: Stefan Monnier <monnier <at> IRO.UMontreal.CA>

Bug is archived. No further changes may be made.

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From: Stefan Monnier <monnier <at> IRO.UMontreal.CA>
To: Daniel Colascione <dancol <at> dancol.org>
Cc: Nicolas Richard <theonewiththeevillook <at> yahoo.fr>, Dmitry Antipov <dmantipov <at> yandex.ru>, 17168 <at> debbugs.gnu.org
Subject: bug#17168: 24.3.50; Segfault at mark_object
Date: Wed, 02 Apr 2014 19:24:30 -0400

> It's 32 bytes long, which means that we're trying to mark a pointer into
> the middle of the vector.
> The clear-transient-map symbol itself, of course, is live. It's
> perfectly normal and its value slot is set to Qunbound.

So, IIUC the symbol-function slot of the clear-transient-map symbol
points in the middle of a vector?

Since the symbol-function slot of the clear-transient-map symbol is only
set once, I think this means that the vector to which it pointed has
been somehow freed.

Of course that shouldn't be possible: at any previous GC, either the
clear-transient-map symbol was found live and traced (so the vector to
which it pointed shouldn't have been freed) or it wasn't found live, in
which case the symbol-function slot should have been set to the special
"dead" value.


        Stefan
This bug report was last modified 11 years and 47 days ago.

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