User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.8.1.12) Gecko/20080207 Ubuntu/7.10 (gutsy) Firefox/2.0.0.12 Build Identifier: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9b4pre) Build has the extensions/python extensions enabled and debug enabled. Opening the pyxul test script "chrome://pyxultest/content/pyxultest.xul" window, I receive the following assertion error for every dom event Python handles: ###!!! ASSERTION: JSEventListener has wrong script context?: 'stack && NS_SUCCEEDED(stack->Peek(&cx)) && cx && GetScriptContextFromJSContext(cx) == mContext', file /home/toddw/src/mozilla/src/trunk_debug_2/mozilla/dom/src/events/nsJSEventListener.cpp, line 244 The actual event handling seems to work correctly, so I'm unsure if this is simply a logging error, or there is a real bug in there. Note: This is a follow-on from bug 419765. Reproducible: Always Steps to Reproduce: 1. 2. 3.

That assertion was added in bug 347480. Probably should check mContext->GetScriptTypeID for JS before asserting. And we really should rename nsJSEventListener now that it can be used for more than JS.