1333605 - Crash in IPCError-browser | ShutDownKill when GCing

Status: RESOLVED WORKSFORME

(Core :: JavaScript: GC, defect, P2)

Description

[(no longer active)]

This bug was filed from the Socorro interface and is 
report bp-6f88a133-6081-4955-96a3-a2f452170105.
=============================================================

I'm not sure why this crash happens, since I was under the impression that in release builds we avoid doing CC/GC during shutdown, and according to the crash report we are in the quit-application phase...

Comment 1

[Andrew McCreight [:mccr8]]

We don't do extra GCs, but this just looks like a regular GC (well, CC that triggers a GC) off a timer. If this is a common problem, we could kill the GC/CC timers when we're shutting down.

Comment 2

[Olli Pettay [:smaug][[e-mail]]]

We do kill CC/GC timers during shutdown in nsJSEnvironmentObserver::Observe

Comment 3

[(no longer active)]

(In reply to Olli Pettay [:smaug] from comment #2)
> We do kill CC/GC timers during shutdown in nsJSEnvironmentObserver::Observe

Hmm, you're right.  Which suggests to me that this crash shouldn't be happening.  Not sure what I'm missing.  :/

Comment 4

[bull500]

(In reply to :Ehsan Akhgari (needinfo please, extremely long backlog) from comment #3)
> (In reply to Olli Pettay [:smaug] from comment #2)
> > We do kill CC/GC timers during shutdown in nsJSEnvironmentObserver::Observe
> 
> Hmm, you're right.  Which suggests to me that this crash shouldn't be
> happening.  Not sure what I'm missing.  :/

I just had this happen to me so I'll post what i was doing  

I had a bunch of websites open   
2 tabs of reddit  
1 google search  
1 https://people-mozilla.org/~dteller/talks/Telemetry%20on%20Servo.pdf   
https://wiki.mozilla.org/Quantum/DOM
https://wiki.mozilla.org/Quantum/Flow
https://wiki.mozilla.org/Platform/GFX/Quantum_Render
https://wiki.mozilla.org/Quantum/Stylo
https://servo.org/  

Also i had servo running in the background + terminal(to run servo).  

Entire ubuntu system went into a lock up for a long time - completely frozen including the mouse  
What triggered the freeze was one of the pages on quantum(Flow) had a Huge list of bugs and i kept scrolling down and down till everything locked up  
The flow site is currently showing a database error -idk why. Its the one with the huge list of bugs still accessible via google search cache

Comment 5

[bull500]

https://crash-stats.mozilla.com/report/index/eaece7ed-b0e6-42c3-82c3-03bd30170610 
https://crash-stats.mozilla.com/report/index/616df173-3632-493f-8bf3-59fd60170611  

Sorry forgot to add in the crash reports for addl info

Comment 6

[Jagan]

I got a few crash reports from support question, https://support.mozilla.org/en-US/questions/1170884#answer-995685 that pointed to this bug. I am linking them here in case if it can be confirmed:

https://crash-stats.mozilla.com/report/index/bp-e0ebe04d-45f5-484f-aa35-edded0170811
https://crash-stats.mozilla.com/report/index/bp-b0708b67-7490-4f90-a1b4-cdc1c0170811
https://crash-stats.mozilla.com/report/index/bp-0cde1b16-50b5-475a-810b-79b7f0170811

Comment 7

[Tobias B. Besemer [:BesTo] (QA)]

Jagan, seems the crashes have noting to do with Garbage Collection - they have to do with Graphics.
Can the user reproduce the crashes?
Can you fill a new bug for it and post a link to the new bug here?

Comment 8

[Jagan]

I have filed it here, bug 1390031.

Comment 9

[BugBot [:suhaib / :marco/ :calixte]]

Closing because no crashes reported for 12 weeks.