612365 - Mozilla freezes when start this code ;)

Status: RESOLVED DUPLICATE of bug 612029

(Core :: General, defect)

Description

[ClsHack]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/534.7 (KHTML, like Gecko) Chrome/7.0.517.44 Safari/534.7
Build Identifier: Mozilla/5.0 (Windows NT 5.1; rv:2.0b7) Gecko/20100101 Firefox/4.0b7 Build tools Compiler 	Version 	Compiler flags d;D:\mozilla-build\msys\mozilla-build\python25\python2.5.exe -O e;D:\mozilla-build\msys\builds\moz2_slave\win32_build\build\build\cl.py cl 	14.00.50727.762 	-TC -nologo -W3 -Gy -Fdgenerated.pdb -DNDEBUG -DTRIMMED -Zi -Zi -UDEBUG -DNDEBUG -GL -wd4624 -wd4952 -O1 d;D:\mozilla-build\msys\mozilla-build\python25\python2.5.exe -O e;D:\mozilla-build\msys\builds\moz2_slave\win32_build\build\build\cl.py cl 	14.00.50727.762 	-GR- -TP -nologo -Zc:wchar_t- -W3 -Gy -Fdgenerated.pdb -wd4800 -DNDEBUG -DTRIMMED -Zi -Zi -UDEBUG -DNDEBUG -GL -wd4624 -wd4952 -O1 

Code:

<script>document.write('a')</script>
<script>for(var i=1;i<=3;i++)document.write(document.body.innerHTML)</script>



Reproducible: Always

Steps to Reproduce:
<script>document.write('a')</script>
<script>for(var i=1;i<=3;i++)document.write(document.body.innerHTML)</script>


Actual Results:  
Browser crash... not responding ;)  

Expected Results:  
Firefox block this script for security. 



Build tools
Compiler 	Version 	Compiler flags
d;D:\mozilla-build\msys\mozilla-build\python25\python2.5.exe -O e;D:\mozilla-build\msys\builds\moz2_slave\win32_build\build\build\cl.py cl 	14.00.50727.762 	-TC -nologo -W3 -Gy -Fdgenerated.pdb -DNDEBUG -DTRIMMED -Zi -Zi -UDEBUG -DNDEBUG -GL -wd4624 -wd4952 -O1
d;D:\mozilla-build\msys\mozilla-build\python25\python2.5.exe -O e;D:\mozilla-build\msys\builds\moz2_slave\win32_build\build\build\cl.py cl 	14.00.50727.762 	-GR- -TP -nologo -Zc:wchar_t- -W3 -Gy -Fdgenerated.pdb -wd4800 -DNDEBUG -DTRIMMED -Zi -Zi -UDEBUG -DNDEBUG -GL -wd4624 -wd4952 -O1

Comment 1

[Matthias Versen [:Matti]]

a freeze/hang is not a crash, both are different technical terms.
bug 609358 is similar but is causing a crash

I can confirm a hang with FF4.0b7