324151 - ASSERTION: getElementById(""), fix caller?: '!aId.IsEmpty()'

Status: RESOLVED DUPLICATE of bug 296237

(Core :: XUL, defect)

Description

[Martijn Wargers (dead)]

###!!! ASSERTION: getElementById(""), fix caller?: '!aId.IsEmpty()', file c:/moz
illa/mozilla/content/xul/document/src/nsXULDocument.cpp, line 1650

See testcase, you have to download the testcase locally to get the assertion.
You need to drag the left button.

Comment 1

[Martijn Wargers (dead)]

Attachment: testcase

The button doesn't have an id, when I add an id to the button, the assertion goes away.

Comment 2

[Nickolay_Ponomarev]

So.. in toolboxObserver.onDragStart you're calling 
  var item =document.getElementById(evt.target.id);
which causes the assertion. Is this basically bug 296237 or am I missing something?

Comment 3

[Martijn Wargers (dead)]

Oops! You're right, thanks. That's the problem when you see it happening with such a large testcase, it's not easy to see where the problem is coming from.

*** This bug has been marked as a duplicate of 296237 ***