282104 - BoxObject's InvalidatePresentationStuff needs ability to tell document to remove it from its boxobject table

Status: VERIFIED DUPLICATE of bug 282105

(Core :: XUL, defect)

Description

[Ben Goodger (use ben at mozilla dot org for email)]

We can get into situations where an element's box object becomes useless because
of some sequence of events like this: frames are destroyed (e.g. in response to
opacity changes (?)), InvalidatePresentationStuff is called on the box object in
question, but the document still holds it in its boxobject table, so that when
script attempts to subsequently access boxobject methods, the busted boxobject
with null mPresShell etc is used, and none of the methods work. 

This was noted in earlier testing versions of my new prefwindow where I had a
listbox and was attempting to access properties on it after the pane was faded in. 

The solution appears to be that in some cases when InvalidatePresentationStuff
is called, we want to tell the document to take it out of the boxobject table,
which is what this patch does. See also the patch in 282103, which updates the
call sites in nsXULDocument.

Comment 1

[:Gavin Sharp [email: [e-mail]]]

*** This bug has been marked as a duplicate of 282105 ***