Comment 6 for bug 243520

Here's a traceback from placing a call to Debugger where I was returning if a plugin instance existed.

Breakpoint 1, 0x95c7d86d in Debugger ()
(gdb) bt
#0 0x95c7d86d in Debugger ()
#1 0x09e6b54b in nsObjectLoadingContent::Instantiate ()
#2 0x09e6b79e in nsAsyncInstantiateEvent::Run ()
#3 0x001bd6da in nsThread::ProcessNextEvent ()
#4 0x0017dcb7 in NS_ProcessPendingEvents_P ()
#5 0x007bbd22 in nsBaseAppShell::NativeEventCallback ()
#6 0x0078c99a in nsAppShell::ProcessGeckoEvents ()
#7 0x930a462e in CFRunLoopRunSpecific ()
#8 0x930a4d18 in CFRunLoopRunInMode ()
#9 0x961976a0 in RunCurrentEventLoopInMode ()
#10 0x961973f2 in ReceiveNextEventCommon ()
#11 0x9619732d in BlockUntilNextEventMatchingListInMode ()
#12 0x920ae7d9 in _DPSNextEvent ()
#13 0x920ae08e in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] ()
#14 0x920a70c5 in -[NSApplication run] ()
#15 0x0078bcfa in nsAppShell::Run ()
#16 0x005c8367 in nsAppStartup::Run ()
#17 0x0004ce15 in XRE_main ()
#18 0x00005c04 in main ()