134404 - Browser usually hangs trying to load this page

Status: RESOLVED DUPLICATE of bug 122554

(Core :: MathML, defect)

Description

[jsmith]

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.9) Gecko/20020313
BuildID:    2002031312

The browser usually (but not always) hangs when trying to load this page.

Reproducible: Sometimes
Steps to Reproduce:
1.Just load this URL.
2.
3.

Actual Results:  The browser hung and I had to kill it.

Expected Results:  Load this web page (which is validated XHTML/MATHML)

Comment 1

[Adam Hauner]

WFM 2002032916/Win2K

Comment 2

[Vadim Berezniker]

I've narrowed it down to the <mtable>.
It seems to be that that an empty <mtext> causes the freeze.

Reporter,

For a workaround you can try removing the <mtext></mtext> or putting something
invisible between them.

Confirming on Linux build #2002032919

Comment 3

[Vadim Berezniker]

(Sometimes it doesn't hang on the first time, either reloading or going back and
forward should hang it)

Comment 4

[Vadim Berezniker]

Attachment: xml file needed to hang mozilla

in order for this to work you must have a '134494.css' file which can be empty.

(touch 134494.css will do)

Comment 5

[Vadim Berezniker]

The file I attached is the simplified test case.

It's interesting to note that it doesn't actually require the css file after all.
As long as the link tag refers to a stylesheet, this hang will occur.

If you remove the stylesheet, it will not hang.

Comment 6

[rbs]

It reminds bug 125404.

Comment 7

[rbs]

BTW, cannot reproduce - it works for me on Win2K with a more recent build from 
the tip. Please try a more recent build.

Comment 8

[Vadim Berezniker]

right. just built again [2002033119] and it no longer hangs.

Comment 9

[jsmith]

The bug goes away when I defined classes in the CSS file for all of the classes
that appeared in the document. It is as if mozilla can't handle a file that
declares some but not all of the classes used in the document.

Comment 10

[rbs]

Reporter, did you try a more recent build? As the earlier comments suggest, the 
problem looks similar to another problem that was fixed recently (bug 125404).
There shouldn't be a connection with how many classes are declared (unless of 
course you are overriding 'mtable', mtr', etc, to mean other things than 
'table', 'table-row', etc.

If you are still seeing the bug in a recent build, do well to tell.

Comment 11

[Kai Lahmann (is there, where MNG is)]

can't even get a 0.9.9/Linux to hang on it.. but mine gives Gecko/20020320.

Comment 12

[Gustav]

Is this a dupe of bug 134297?

Comment 13

[Vadim Berezniker]

No it's not. 

Comment 14

[rbs]

> Comment #2 From Vadim Berezniker
>
> I've narrowed it down to the <mtable>.
> It seems to be that that an empty <mtext> causes the freeze.

Okay, so this is a dup of bug 122554.


*** This bug has been marked as a duplicate of 122554 ***