Public bug reported:

Binary package hint: firebug

Ubuntu 8.04
firebug 1.2~b21+svn573-0ubuntu1

100% reproducible crash when hitting a breakpoint. It seems to be
related to the breakpoint's being within a callback function invoked by
an XMLHTTPRequest library.

Steps to reproduce -- I found the behavior to be reproducible using
these exact steps, and small variations from this recipe sometimes
failed to cause the crash:

1. Place attached file delme.html into a web server directory and open
it in FF 3b5. I don't think you can repro this behavior in a local file
because it relies on an XMLHTTPRequest.

2. Open Firebug in lower pane.

3. Go to Script tab

4. Select file delme.html

5. Set a break point by clicking at line 27.

6. Hit refresh or F5.

7. Firebug for some reason breaks at line 13 even though we have not set
any break there. Press continue button or F8.

8. Click the "do it" button on the HTML form.

Expected behavior: Firebug pauses execution at break point line 27.

Actual behavior: Firefox vanishes from the screen.

It may be relevant that the method call on line 27 is a function that
does not exist. I have encountered an apparent variation of the bug in
which no break point is necessary -- Firebug I think attempts to
complain about the non-existent function, but causes the crash. Sorry,
haven't been able to get a stable repro case for that.

** Affects: firebug (Ubuntu)
     Importance: Undecided
         Status: New

-- 
Firebug crashes Firefox hitting breakpoint
https://bugs.launchpad.net/bugs/225446
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