Re: Scroll bar accessibility crashes
Re: Scroll bar accessibility crashes
- Subject: Re: Scroll bar accessibility crashes
- From: Eric Schlegel <email@hidden>
- Date: Mon, 6 Jan 2003 11:42:50 -0800
On Monday, January 6, 2003, at 11:04 AM, Raymond Fischer wrote:
Interesting bug I've come across, apparently somewhere in the scroll
bar
code. Using the UIElementInspector from Apple's sample code, queries
on the scroll bar thumb will crash the app. I've confirmed this with
Finder, iTunes, and CodeWarrior.
The interesting part is that the bug does not turn up with Terminal.
Probably because Finder, iTunes, and CodeWarrior are Carbon apps, and
Terminal is a Cocoa app, so they're two completely different
implementations of the scrollbar and accessibility in general.
What version of the OS are you seeing this on? In 10.2.3 we made a fair
number of changes to the scrollbar control. If it happens in 10.2.3,
you should definitely submit a bug with a backtrace for the crash.
Alternately, is it possible to enable the debug foundation libraries
for a CFM app so that I can get more information?
In theory, yes, although I've heard of some problems using the debug
libraries. You could do the following from the command line:
cd /System/Library/Frameworks/CoreFoundation.framework/Versions/A
sudo -s
mv CoreFoundation CoreFoundation_ship
mv CoreFoundation_debug CoreFoundation
exit
LaunchCFMApp <PathToYourAppHere>
When you want to revert to the shipping CoreFoundation, just move
CoreFoundation back to CoreFoundation_debug and CoreFoundation_ship
back to CoreFoundation. Make sure, as above, to do this from a single
"sudo -s" root shell; if you temporarily leave your system without a
valid CoreFoundation, just about nothing will work properly, including
sudo.
-eric
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