query about minimised code

Reported by:	anonymous	Owned by:
Priority:	undecided	Milestone:	1.5
Component:	unfiled	Version:	1.4.4
Keywords:		Cc:
Blocked by:		Blocking:

Description

Firefox's firebug is throwing an error "reference to undefined property a[c.expando]" and shows this part of the code base

from jquery.1.4.4.min.js on firefox 3.6.12

--snip

e);if(e=e&&e.events){delete f.handle;f...f(d==="margin")e+=parseFloat(c.css(a,

--snip

does the e=e in the if statement actually do anything? is the minification code broken?

Attachments (0)

Change History (4)

Changed November 24, 2010 11:08AM UTC by jitter comment:1

_comment0:	Thanks for taking the time to contribute to the jQuery project by writing a bug report! \ \ Please submit a reduced test case, which reproduces the issue you are experiencing, on http://jsfiddle.net. So that we can investigate this issue further. \ ----- \ [http://docs.jquery.com/How_to_Report_Bugs How to report bugs] → 1290612487855143
_comment1:	Thanks for taking the time to contribute to the jQuery project by writing a bug report! \ \ Please submit a reduced test case, which reproduces the issue you are experiencing, on http://jsfiddle.net. So that we can investigate this issue further. \ \ And yes the `e=e&&e.events` statement does something and the minification code is not broken. \ ----- \ [http://docs.jquery.com/How_to_Report_Bugs How to report bugs] → 1290623206999110
owner:	→ anonymous
status:	new → pending

Thanks for taking the time to contribute to the jQuery project by writing a bug report!

Please submit a reduced test case, which reproduces the issue you are experiencing, on http://jsfiddle.net. So that we can investigate this issue further.

And yes the e=e&&e.events statement does something and the minification code is most likely not broken also the code snippet you posted doesn't include the statement a[c.expando] and this probably unrelated.

How to report bugs

Changed December 01, 2010 02:35PM UTC by jitter comment:2

owner:	anonymous
status:	pending → new

Changed December 01, 2010 02:36PM UTC by jitter comment:3

_comment0:	→ 1291214204328045
resolution:	→ invalid
status:	new → closed

No test case was submitted. So closing this. Feel free to reopen with a reproducible test case

Changed June 22, 2011 02:20PM UTC by kdolan@dce.harvard.edu comment:4

I also get "reference to undefined property a[c.expando]" on line 42 from Firefox from jquery 1.4.3 quite a lot. It only freezes page load when Firefox is in debug mode.

The HTML page also includes the jquery.tablesorter plugin. Sometimes the HTML is generated with a table and sometimes not. The error seems to occur when the table is not present in the HTML. But that theory has not be thoroughly tested.

Here's the Break line #42 of jquery 1.4.3 (it include the c.expando):

cellspacing:"cellSpacing",rowspan:"rowSpan",colspan:"colSpan",tabindex:"tabIndex",usemap:"useMap",frameborder:"frameBorder"};var pa={},Oa=/^(?:\\{.*\\}|\\[.*\\])$/;c.extend({cache:{},uuid:0,expando:"jQuery"+c.now(),noData:{embed:true,object:"clsid:D27CDB6E-AE6D-11cf-96B8-444553540000",applet:true},data:function(a,b,d){if(c.acceptData(a)){a=a==E?pa:a;var e=a.nodeType,f=e?a[c.expando]:null,h=c.cache;if(!(e&&!f&&typeof b==="string"&&d===A)){if(e)f||(a[c.expando]=f=++c.uuid);else h=a;if(typeof b==="object")if(e)h[f]=

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