412651 - "ASSERTION: Have parent context and shouldn't" changing stylesheet during onerror with <xul:tabs>

Status: RESOLVED WORKSFORME

(Core :: CSS Parsing and Computation, defect)

Description

[Jesse Ruderman]

Attachment: testcase

*Reloading* the testcase triggers:

###!!! ASSERTION: Have parent context and shouldn't: 'Error', file /Users/jruderman/trunk/mozilla/layout/base/nsFrameManager.cpp, line 834
frame: LeafBox(spacer)(-1) (0x408d7b74) style: 0x408d7ae8 {}
Has parent context:  style: 0x408d79c8 {}
Should be null

Leaving the testcase in other ways, such as loading another page or closing the window, does not trigger the assertion!  If you can come up with a saner testcase, please attach it!

Comment 1

[Boris Zbarsky [:bzbarsky]]

This worksforme on Linux (Firefox and Seamonkey, loading that attachment from eitehr Bugzilla or local disk).

Comment 2

[Jesse Ruderman]

WFM on Mac.  The onerror handler is called, but the assertion doesn't appear when I reload.

Comment 3

[Jesse Ruderman]

Attachment: Patch to add a crashtest (uses frames)

I haven't tested this in an old debug build to make sure it triggers the bug, but bz encouraged me to check in a test anyway.