57585 - certain javascript hangs browser

Status: VERIFIED DUPLICATE of bug 55460

(Core :: JavaScript Engine, defect, P3)

Description

[japh_loop]

From Bugzilla Helper:
User-Agent: Mozilla/4.75 [en] (Win98; U)
BuildID:    2000102108

The javascript activated by clicking the "Mozilla bug" link appears to hang the 
browser. The windows came up ONCE with a weird scrambled title but was never 
reproduced again from about 6 tries.

Reproducible: Sometimes
Steps to Reproduce:
1.Go to "http://bugzilla.mozilla.org/"
2.Click on the "Mozilla bug" link in the "Show Mozilla bug No."

Actual Results:  Browser appears to hang; it dowsn't respond to any commands but 
is not listed as "Not Responding" in the "End Task" box. The home page button in 
the upper right-hand corner continues to function, leading me to believe that it 
"appears" to hang.

Expected Results:  The javascript be executed and that a dialog box be brought 
up asking for the bug number.

***Start Affected Code***
<A href="javascript: id=document.getSelection(); if(!id) { void(id=prompt('Enter 
Mozilla bug number or summary term, or * to go straight to Bugzilla:','*')) } 
if(id) { if(id == 'main') { document.location='http://bugzilla.mozilla.org/' } 
else if(isNaN(id)) { 
document.location='http://bugzilla.mozilla.org/buglist.cgi?short_desc='+escape(i
d) } else { 
document.location='http://bugzilla.mozilla.org/show_bug.cgi?id='+escape(id) } 
}">Mozilla bug</A>
***End Affected Code***

It doesn't respond to any commands but is not listed as "Not Responding" in the 
"End Task" box. The home page button in the upper right-hand corner continues to 
function, leading me to believe that it only "appears" to hang. This javascript 
code was successfully executed in Netscape Navigator.

Comment 1

[R.K.Aa.]

this was once bug 37463, now marked fixed. Added a comment there about this bug.

Comment 2

[R.K.Aa.]

I don't see this with linux SEA 2000102021 btw.

Comment 3

[sean echevarria]

Confirm on Win2k with build from trunk tip 10/21.
It becomes unresponsive to user input, the throbber stops throbbing, cpu usage
goes to zero, but dragging another window across the browser does cause updates
to occur and causes the cpu usage for the process to go up while painting.

Comment 4

[bht237]

Confirming this with build 2000101904 on Win95.
Appears to be same behavior as in bug 57471.
Link there is:
<A href="javascript:alert('Vertical')" onMouseOver="return swap('vrt',vrtOvr)"
onMouseOut="return swap('vrt',vrtOut)">
    <IMG name="vrt" SRC="images/arrowup.gif" height=40 width=40 border=0></A>
57471 might be duplicate of this. Has test case attached to it.
However other javascript links work for me.
Looks suspiciously like a JavaScript nested quotes/escaping problem:
void(id=prompt(\'Enter Mozilla ...

Recommend to look at 51847 !!!
Fails with JavaScript escaping in a very obvious way. Has simple test case.
51847 should be fixed asap IMHO.

Comment 5

[John Morrison]

Boink.

*** This bug has been marked as a duplicate of 55460 ***

Comment 6

[Phil Schwartau]

Verified Duplicate -