Bug 1325454

Summary:	Latest firefox package, firefox-45.0.1-6.fc25, in rawhide gets segmentation faults all the time.
Product:	[Fedora] Fedora	Reporter:	stan <gryt2>
Component:	firefox	Assignee:	Martin Stransky <stransky>
Status:	CLOSED WORKSFORME	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	rawhide	CC:	gecko-bugs-nobody, gryt2, jhorak, pjasicek, stransky
Target Milestone:	---
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Hardware:	Unspecified
OS:	Unspecified
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Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-04-11 16:51:13 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description stan 2016-04-08 21:00:17 UTC

Description of problem:
When running the latest firefox package in rawhide (fc25), the browser gets many segmentation faults. One of them occurred while I was not doing anything.

Version-Release number of selected component (if applicable):
firefox-45.0.1-6.fc25

How reproducible:
Seems to happen intermittently at anytime. I didn't notice any activity that caused it consistently.

Steps to Reproduce:
1. Install firefox-45.0.1-6.fc25 in rawhide
2. Run as browser
3.

Actual results:
Pretty regular segmentation faults. (Five or six in half an hour?)

Expected results:
Runs as normal.

Additional info:
I think this might have something to do with gcc6. I have been having problems compiling and running nightly with any optimization in rawhide since gcc6 became the default compiler version. If I compile without optimization, -O0, nightly runs fine and is stable, but is slow, and on some things, like dns resolution, or communication with websites, very slow. I have / had a bug open in the mozilla bugzilla, https://bugzilla.mozilla.org/show_bug.cgi?id=1256687. It's been duplicated to https://bugzilla.mozilla.org/show_bug.cgi?id=1245783. It seems there is an incompatibility between gcc6 optimization and mozilla firefox code. It will get resolved, but it is painful in the meantime.

I've reverted to firefox-45.0.1-4.fc25, which has been stable for me since it was installed.

There is no information with the segfaults. I run from a console so I can see error messages, and this is what prints.

$ /usr/bin/firefox
Segmentation fault (core dumped)

Comment 1 Martin Stransky 2016-04-11 11:25:07 UTC

Can you please attach a backtrace of the crash? You can diagnose the core dump or use ABRT to catch the crash.

Comment 2 stan 2016-04-11 16:51:13 UTC

This morning, I updated my system, and as part of that update, firefox updated to the -6 version again.  I have been running it since update, and there have been no seg faults.  In the time it has been running, there would have been at least three before.

So, I think something else in the update fixed whatever was causing the problem.  I noticed that gcc6 was updated.  Based on that, I am closing the bug.  If the problem recurs, I will re-open it, but I don't think that will happen.

And a good thing, because I didn't notice any abrt notices from the prior segfaults, and I'm not sure where to find core files.  I actually thought that they were being sent to /dev/null now.

Perhaps this implies that good things are going to happen in my nightly compiles in rawhide, also.  That would be great.