* bug#11144: bootstrap w/gcc-4.8.0 + nonzero MALLOC_PERTURB_ -> ./temacs segfault [not found] <87pqbre1gq.fsf@rho.meyering.net> @ 2012-04-03 16:27 ` Jim Meyering [not found] ` <87zkas232w.fsf@rho.meyering.net> 1 sibling, 0 replies; 5+ messages in thread From: Jim Meyering @ 2012-04-03 16:27 UTC (permalink / raw) To: Emacs development discussions; +Cc: 11144-done Jim Meyering wrote: > Just a heads-up, since release is so near: > > gcc-4.8.0 vs emacs+MALLOC_PERTURB_ = ./temacs segfault > http://debbugs.gnu.org/11144 > > It would be a shame if gcc-4.8.0 (even test a release) were to > fail to bootstrap emacs with MALLOC_PERTURB_ set to nonzero. This seems to have been fixed, since with the latest from gcc/svn, git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@186106 138bc75d-0d04-0410-961f-82ee72b054a4 I can now bootstrap the latest emacs. ^ permalink raw reply [flat|nested] 5+ messages in thread
[parent not found: <87zkas232w.fsf@rho.meyering.net>]
* bug#11144: bootstrap w/gcc-4.8.0 + nonzero MALLOC_PERTURB_ -> ./temacs segfault [not found] ` <87zkas232w.fsf@rho.meyering.net> @ 2012-04-10 9:13 ` Jim Meyering [not found] ` <87hawslzkm.fsf@rho.meyering.net> 1 sibling, 0 replies; 5+ messages in thread From: Jim Meyering @ 2012-04-10 9:13 UTC (permalink / raw) To: Emacs development discussions; +Cc: 11144 Jim Meyering wrote: > Jim Meyering wrote: >> Just a heads-up, since release is so near: >> >> gcc-4.8.0 vs emacs+MALLOC_PERTURB_ = ./temacs segfault >> http://debbugs.gnu.org/11144 >> >> It would be a shame if gcc-4.8.0 (even test a release) were to >> fail to bootstrap emacs with MALLOC_PERTURB_ set to nonzero. > > This seems to have been fixed, since with the latest from gcc/svn, > git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@186106 > 138bc75d-0d04-0410-961f-82ee72b054a4 > I can now bootstrap the latest emacs. This has struck again, now using gcc version 4.8.0 20120406 I've reopened the bug. ^ permalink raw reply [flat|nested] 5+ messages in thread
[parent not found: <87hawslzkm.fsf@rho.meyering.net>]
* bug#11144: bootstrap w/gcc-4.8.0 + nonzero MALLOC_PERTURB_ -> ./temacs segfault [not found] ` <87hawslzkm.fsf@rho.meyering.net> @ 2012-04-10 10:19 ` Eli Zaretskii 2012-04-10 11:07 ` Jim Meyering 2012-04-10 16:36 ` Paul Eggert 1 sibling, 1 reply; 5+ messages in thread From: Eli Zaretskii @ 2012-04-10 10:19 UTC (permalink / raw) To: Jim Meyering; +Cc: 11144 > From: Jim Meyering <jim@meyering.net> > Date: Tue, 10 Apr 2012 11:13:13 +0200 > Cc: 11144@debbugs.gnu.org > > Jim Meyering wrote: > > Jim Meyering wrote: > >> Just a heads-up, since release is so near: > >> > >> gcc-4.8.0 vs emacs+MALLOC_PERTURB_ = ./temacs segfault > >> http://debbugs.gnu.org/11144 > >> > >> It would be a shame if gcc-4.8.0 (even test a release) were to > >> fail to bootstrap emacs with MALLOC_PERTURB_ set to nonzero. > > > > This seems to have been fixed, since with the latest from gcc/svn, > > git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@186106 > > 138bc75d-0d04-0410-961f-82ee72b054a4 > > I can now bootstrap the latest emacs. > > This has struck again, now using gcc version 4.8.0 20120406 > I've reopened the bug. Why should we consider this an Emacs bug? Is there any evidence that it's not a GCC bug, especially since it is coming and going depending on GCC commits, and that you are using unreleased version of GCC? P.S. Please don't CC emacs-devel on bug reports, it causes problems with the bug tracker, which sometimes creates bogus new bugs. ^ permalink raw reply [flat|nested] 5+ messages in thread
* bug#11144: bootstrap w/gcc-4.8.0 + nonzero MALLOC_PERTURB_ -> ./temacs segfault 2012-04-10 10:19 ` Eli Zaretskii @ 2012-04-10 11:07 ` Jim Meyering 0 siblings, 0 replies; 5+ messages in thread From: Jim Meyering @ 2012-04-10 11:07 UTC (permalink / raw) To: Eli Zaretskii; +Cc: 11144 Eli Zaretskii wrote: >> From: Jim Meyering <jim@meyering.net> >> Date: Tue, 10 Apr 2012 11:13:13 +0200 >> Cc: 11144@debbugs.gnu.org >> >> Jim Meyering wrote: >> > Jim Meyering wrote: >> >> Just a heads-up, since release is so near: >> >> >> >> gcc-4.8.0 vs emacs+MALLOC_PERTURB_ = ./temacs segfault >> >> http://debbugs.gnu.org/11144 >> >> >> >> It would be a shame if gcc-4.8.0 (even test a release) were to >> >> fail to bootstrap emacs with MALLOC_PERTURB_ set to nonzero. >> > >> > This seems to have been fixed, since with the latest from gcc/svn, >> > git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@186106 >> > 138bc75d-0d04-0410-961f-82ee72b054a4 >> > I can now bootstrap the latest emacs. >> >> This has struck again, now using gcc version 4.8.0 20120406 >> I've reopened the bug. > > Why should we consider this an Emacs bug? Is there any evidence that > it's not a GCC bug, especially since it is coming and going depending > on GCC commits, and that you are using unreleased version of GCC? I do not know enough about this to claim it is due to a bug in gcc or in emacs. However, note that this report shows a probable use of freed memory in temacs, and that generally implicates the application, not the compiler. One additional data point: I've just built today's gcc version 4.8.0 20120410, and have used it to bootstrap emacs(trunk) four times with no such failure. ^ permalink raw reply [flat|nested] 5+ messages in thread
* bug#11144: bootstrap w/gcc-4.8.0 + nonzero MALLOC_PERTURB_ -> ./temacs segfault [not found] ` <87hawslzkm.fsf@rho.meyering.net> 2012-04-10 10:19 ` Eli Zaretskii @ 2012-04-10 16:36 ` Paul Eggert 1 sibling, 0 replies; 5+ messages in thread From: Paul Eggert @ 2012-04-10 16:36 UTC (permalink / raw) To: Jim Meyering; +Cc: 11144 On 04/10/2012 02:13 AM, Jim Meyering wrote: > This has struck again, now using gcc version 4.8.0 20120406 > I've reopened the bug. This is in an area of Emacs code that is sensitive to minor details in how the C compiler works, and it's quite possible that the bug is in Emacs, not in GCC. Certainly I've seen similar tracebacks which came from Emacs bugs. If you're bisecting, you might want to look at Emacs trunk bzr 107789, which I committed three days ago, and which affects this part of the code. I don't offhand see why it would cause the problem (though perhaps it might *fix* the problem :-). ^ permalink raw reply [flat|nested] 5+ messages in thread
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2012-04-03 16:27 ` bug#11144: bootstrap w/gcc-4.8.0 + nonzero MALLOC_PERTURB_ -> ./temacs segfault Jim Meyering
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2012-04-10 10:19 ` Eli Zaretskii
2012-04-10 11:07 ` Jim Meyering
2012-04-10 16:36 ` Paul Eggert
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