270565 - crash if I try to create components one by one

Status: VERIFIED INVALID

(Core :: XPConnect, defect)

Description

[alexander :surkov (:asurkov)]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7) Gecko/20040616
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7) Gecko/20040616

for(var i in Components.classes){
	if(i=="@mozilla.org/generic-factory;1") continue;
//see the bug https://bugzilla.mozilla.org/show_bug.cgi?id=270562
	try{
		var q=Components.classes[i].createInstance();
	}catch(e){}
}

Reproducible: Always
Steps to Reproduce:

Comment 1

[David Bradley]

Is this really an XPConnect issue? There are many components that don't behave 
well when you use createInstance. I think the issue is they're expected to be 
constructed and handed out from other components and not constructed as free 
standing objects.

I imagine there's a slew of them, and if it's a real problem, file bugs on the 
individual components.

If there is a problem in iterating the classes collection or similar issue that 
points to XPConnect, please reopen this.

Comment 2

[timeless]

almost all of the bugs about crashers like this are filed by me (rginda filed a
few). i believe some bugs even have detailed blacklists.

arguably xpcom/xpconnect should have made it much easier for components to say
they wanted to be singletons so that people couldn't crash them like this, but
otherwise this is not a fault in xpcom/xpconnect (well, generic factory is a
fault in xpcom...)