Problem: Stepping through program in Firebug causes Firefox to crash.
Oddities:
-source-code line number highlights wrong
-weird lines in watch window.. non-existant variables with numeric
names
Workaround:
- change source-code to get recognized properly - weird vars
disappear and no more crashing.
Long version:
I'm not sure what brought this on. I've been using Firefox 9.01 and
Firebug 1.8,1.9 for a while. hmm.. I guess there was a firefox upgrade
that might've done it...
The problems began with issues trying to enable panels. I had never
had to enable individual panels using firebug before and didn't even
realize it was an option until they suddenly were disabled and I was
told to enable them. The menus to enable them weren't obvious and when
things were working better later I realized they weren't appearing
properly.
Once I was able to get the script panel enabled the crashing began. I
couldn't step through my program very far before it would crash
firefox.
I cleared firebug, re-installed firebug. I re-installed firefox. I
tried a separate profile etc. I slept on it...
Reading on the web firebug seems to indicate any crashing bugs are the
fault of firefox. So I began looking further into issues with the
firefox installation to no avail. Firefox was only crashing when I had
firebug running.
I found some reports on the 'net pointing me back to trying a few
things with firebug. Most specifically I noticed someone write that
firebug can get confused with regard to which lines it highlights in
green ( indicating code lines where you can set a breakpoint). This is
generally when code is loading dynamically but I wasn't doing that but
I had noticed that my code and line-number highlights weren't right. I
had also noticed some strange numbers in the firebug watch window.
Where there should be named variables and values I had about 8 lines
of variables with numeric names and values such as:
5.4326e-100 2.543e235
235235 2.1e244
I noticed that the mismatched number green highlights ( I'll call them
numHL's) tended to be on closing brackets where two blocks ended one
after the other:
1 for ( var a=0; a<b; a++){
2 if( a>c){
3 count++;
4 }
5 }
where lines 4 and 5 should not be highlighted but one would be. In
some cases 2,3,4 and 5 would not be highlighted!
In the case where 2 through 5 were not highlighted ( but 2 & 3 were
expected to be) I was able to get the highlighting to appear by moving
the opening bracket onto its own line:
1 for ( var a=0; a<b; a++)
{
2 if( a>c)
{
3 count++;
4 }
5 }
in cases where 5 was highlighted and shouldn't be I was able to get it
corrected by adding in a line before 5 like this:
1 for ( var a=0; a<b; a++)
{
2 if( a>c)
{
3 count++;
4 }
var donothing1=0;
5 }
When I did this I noticed that the funny lines in the watch window
also disappeared!
and when I tried to step through the program it didn't crash anymore.
of course.. I'd like to get rid of all those donothing vars now... but
at least I can debug!
I may have to remove the donothings just before I obfuscate and
publish? ouch.
Tried Firebug 1.9 and a few 1.8 versions
Firefox 9.0.1 <-- I'll look into getting the newest version.. or
downgrading back one.
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