601904 - Firefox crashes when executing JavaScript

Status: RESOLVED DUPLICATE of bug 601355

(Firefox :: General, defect)

Description

[Reece H. Dunn]

User-Agent:       Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:2.0b7pre) Gecko/20101005 Firefox/4.0b7pre
Build Identifier: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:2.0b7pre) Gecko/20101005 Firefox/4.0b7pre

Firefox is crashing whenever I navigate to a page that has JavaScript enabled. This happens whenever I navigate to at least the following pages:
  1/  http://gmail.com
  2/  http://www.google.co.uk/reader/?tab=my
  3/  http://slashdot.org

If I disable JavaScript, the pages load without crashing. Also, this is only happening on my 64-bit Windows 7 machine (with Direct2D/DirectWrite enabled) and not my 64-bit Ubuntu 10.04 Linux machine.

Reproducible: Always

Comment 1

[Reece H. Dunn]

This does not crash:

   alert("hello");

but this does:

   function test() { alert("hello"); }
   test();

Comment 2

[Reece H. Dunn]

Forgot to mention -- using the nightly builds:
   29/09/2010 firefox-4.0b7pre.en-US.win64-x86_64.installer.exe -- good
   04/10/2010 firefox-4.0b7pre.en-US.win64-x86_64.installer.exe -- bad