674007 - Crash @ nsExternalAppHandler::nsExternalAppHandler

Status: RESOLVED DUPLICATE of bug 703882

(Firefox :: General, defect)

Description

[Alex Pakhotin (:alexp)]

Recently Firefox has been crashing for me periodically, almost every day. Here is a couple of crash reports:
https://crash-stats.mozilla.com/report/index/bp-5263197d-aeef-468d-ac8c-edd5b2110724
https://crash-stats.mozilla.com/report/index/bp-a9ea1c62-b2f5-45e6-858b-e5b082110626

Unfortunately I could find specific steps to reproduce. Firefox works for hours and days without hiccups, and then suddenly crashes when I click on a link. Sometimes it's a file to download (.pdf, for example), but sometimes it's just a regular hyperlink.

Both my submitted crash reports show nsExternalAppHandler::nsExternalAppHandler (nsExternalHelperAppService.cpp:1276) at the top of the stack.

I'm not sure what exact revision is that (I have Ubuntu-specific version of Firefox), but it looks like it happens at this line:  gExtProtSvc->AddRef();
here: http://hg.mozilla.org/mozilla-central/file/e3f863f8bf4a/uriloader/exthandler/nsExternalHelperAppService.cpp#l1277

Seems like gExtProtSvc is NULL. Don't know why it happens and what would be a proper fix. A simple patch could be just to check gExtProtSvc for NULL before calling its methods, but it won't fix the real cause why the nsExternalHelperAppService is not available.

Comment 1

[Alex Pakhotin (:alexp)]

Err... I meant "Unfortunately I could NOT find specific steps to reproduce it".

Comment 2

[Makoto Kato [:m_kato]]

This was fixed by bug 703882.