GNU bug report logs - #37006
27.0.50; garbage collection not happening after 26de2d42

Previous Next

Full log

View this message in rfc822 format

From: Eli Zaretskii <eliz <at> gnu.org>
To: Mattias Engdegård <mattiase <at> acm.org>
Cc: jrm <at> ftfl.ca, eggert <at> cs.ucla.edu, 37006 <at> debbugs.gnu.org
Subject: bug#37006: 27.0.50; garbage collection not happening after 26de2d42
Date: Sun, 11 Aug 2019 20:07:15 +0300

> From: Mattias Engdegård <mattiase <at> acm.org>
> Date: Sun, 11 Aug 2019 18:23:28 +0200
> Cc: Eli Zaretskii <eliz <at> gnu.org>, Paul Eggert <eggert <at> cs.ucla.edu>,
>         37006 <at> debbugs.gnu.org
> 
> Observed on macOS as well. Reason: free_cons has the condition
> 
>  if (INT_ADD_WRAPV (consing_until_gc, sizeof *ptr, &consing_until_gc))
> 
> which will return true (overflow) if consing_until_gc is negative, which is kind of defensible since sizeof is unsigned which causes the sum (consing_until_gc + sizeof *ptr) to be a large unsigned number that doesn't fit into consing_until_gc.
> 
> Clang 10 defines __GNUC__ to 4 which causes intprops.h to not use __builtin_add_overflow despite that being present and working.
> 
> Casting the sizeof should fix it; patch attached.

I believe it should be fixed now.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.