Javascript error using Firebug




JavaScript Engine
7 years ago
2 years ago


(Reporter: pauly, Unassigned)


10 Branch
Windows 7

Firefox Tracking Flags

(Not tracked)


(Whiteboard: [10b1])



7 years ago
Build identifier: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:10.0) Gecko/20100101 Firefox/10.0

Reproducible: always

Steps to reproduce:
1. Launch Firefox
2. Install latest Firebug:
3. Open
4. Press F12 to display the Firebug console
5. Go to Console and Script panels and enable them
6. Stay on the Script panel
7. Ctrl-R to reload
8. Click on lines 1 and 2 to set breakpoints.
9. Ctrl-R to reload
10. Click again on lines 1 and 2 to remove the breakpoints
11. Ctrl-R to reload

Actual results:
"No Javascript on this page" is displayed and the Console panel says:
google is not defined
[a,b];return false}};(function(){var a=google.j;window.onpopstate=

Expected results:
No errors should occur.
Could you get us a regression range for this?

Comment 2

7 years ago
The issue is reproducible on all Firefox versions (v4-v10). 
On Firefox 4 I used for testing since Firebug 1.9 is compatible only with Firefox 5 or higher.
OK, I see the problem too. It looks like users can work around by pressing Ctrl+R again.

I notice that on step 9, the code is actually paused at one of the breakpoints, and if I continue and make sure the code isn't paused, then it works correctly. So it looks like there is some glitch, possibly a race, where the code isn't seen if paused at a breakpoint. I think it may be a Firebug bug rather than a JS engine bug, although I'm not sure.


4 years ago
Assignee: general → nobody
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