664773 - This indic script webpage causes Firefox 4 (and 5 beta) to freeze.

Status: RESOLVED WORKSFORME

(Core :: Layout: Text and Fonts, defect)

Description

[[e-mail]]

User-Agent:       Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5; rv:2.0.1) Gecko/20100101 Firefox/4.0.1
Build Identifier: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5; rv:2.0.1) Gecko/20100101 Firefox/4.0.1

Just loading this webpage (on the web or saved as a local html file) causes Firefox to freeze.

Reproducible: Always

Steps to Reproduce:
Just go to the webpage

Actual Results:  
Firefox freezes and has to be force quit.

Expected Results:  
Rendered the page normally. Firefox support for indic (Bengali) is normally excellent, so I am puzzled by what is in the webpage that crashes the browser.

Comment 1

[[e-mail]]

Attachment: Copy from Apple's crash report tool

Comment 2

[Marcia Knous [:marcia]]

WFM using  Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0.1) Gecko/20100101 Firefox/4.0.1. Wondering if it is 10.5 specific?  Are you running with any addons? Please try Firefox in Safe Mode if you are running any extensions.

Comment 3

[[e-mail]]

Hi, tried just now in safe mode. Same problem. In fact, since the page is in my history, even when I start to type the url Firefox hangs.

This page (and other Bengali script pages like this) have become the URLS that must not be typed on my browser.

Comment 4

[Matthias Versen [:Matti]]

It seems that this is a hang in the OS X system font libs.
This looks like an OS X bug and that could explain why marcia doesn't get this with OS X 10.6 (reporter:10.5). The reporter could also have a broken font installed.

Reporter:
Please validate your fonts with fontbook (the os X system tool).

Comment 5

[[e-mail]]

Thanks for the tip Matti. I ran fontbook and removed 4 fonts flagged as problematic. Now I can visit another indic site (http://dsal.uchicago.edu/dictionaries/biswas-bengali/) without crashing, but the original site keeps crashing my browser. I will try by removing fonts with "minor problems"

Comment 6

[[e-mail]]

Bingo! It was a problem with my Bangla fonts with "minor problems"

Thanks so much guys for helping me trouble shoot. I will now find a Bangla font that passes fontbook.

I really appreciate the hard work you guys have put into Firefox's indic support.

Comment 7

[[e-mail]]

In case anyone has the same problem and hits this thread and wants to get Bengali rendering working on Firefox:
The only bangla font that I found that passes fontbook's tests AND renders properly in Firefox is (ironically enough) the Bangla font found at http://onkur.sourceforge.net/

Comment 8

[Matthias Versen [:Matti]]

Do you know which font caused the hang and from where do you got it ?
Someone else have to confirm that this is either a font or OS X bug and nothing that we could fix in Firefox itself.
I'm only an amateur for reading stack traces and I don't have OS X to test myself.

Comment 9

[[e-mail]]

I believe it is any Bangla OTF font that fontbook flags as having a warning in the 'name' field. (I know nothing about fonts).

An example is http://ekushey.org/?page/rupali

Now, safari with those fonts does not crash. So safari is probably handling this problem font better than Firefox.