1100336 - Startup hang under MOZ_RELEASE_ASSERT in XPCWrappedNativeScope::XPCWrappedNativeScope

Status: RESOLVED INCOMPLETE

(Core :: XPConnect, defect)

Description

[(not currently active) Ted Mielczarek]

Attachment: Stacks of all threads

My Windows Nightly is hanging consistently on startup in the MOZ_RELEASE_ASSERT here:
http://hg.mozilla.org/mozilla-central/annotate/a52bf59965a0/js/xpconnect/src/XPCWrappedNativeScope.cpp#l133

This is doubly bad in that it's hitting that assertion at all, and that it seems to be hanging trying to produce a stack. It gets as far as presenting a Firefox window, but hangs before any content displays. I haven't tried safe mode yet (which I suspect would fix this by disabling e10s) but it doesn't appear to be related to any web content, as it hangs even trying to display the about:sessionrestore page.

Attached are stack traces of all threads from WinDBG. I can't see anything obvious that would be causing a hang here.

Comment 1

[(not currently active) Ted Mielczarek]

bholley says the assertion here is bug 1095305, which was fixed by backout recently, and I just got unlucky with my nightly updates. The hang here worries me, since that would go undetected in our crash reporting.

Comment 2

[Bill McCloskey [inactive unless it's an emergency] (:billm)]

Was this a debug build? I don't know why it would try to walk the stack otherwise.

Comment 3

[(not currently active) Ted Mielczarek]

No, this was a normal nightly.

Comment 4

[Wayne Mery (:wsmwk)]

Still seeing this?

Comment 5

[(not currently active) Ted Mielczarek]

No, I haven't seen this in ages.