Interesting, OK, now remember, t this is new to me. To begin the QL panel I run this required method: - (void)beginPreviewPanelControl:(QLPreviewPanel *)panel { previewPanel = [panel retain]; panel.delegate = self; panel.dataSource = self; } and then it ends with
- (void)endPreviewPanelControl:(QLPreviewPanel *)panel { [previewPanel release]; previewPanel = nil; } Where QLPreviewPanel* previewPanel; is defined in my header file. The crash happens after the begin and never gets to the end. I see here http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/GarbageCollection/Articles/gcCoreFoundation.html that to "ensure the longevity of Objective-C objects, you should use CFRetain instead of retain". I haven't been able to find the correct syntax to replace the retain/release with CFRetain/CFRelease On May 3, 2011, at 7:51 PM, Wim Lewis wrote: > > On 3 May 2011, at 4:03 PM, Brad Stone wrote: >> I have a symbolic breakpoint set and it stops on >> auto_refcount_underflow_error, even the small files. If I continue the doc >> shows in QL. > > Presumably, a few stack frames up, there will be a call to CFRelease() which > is causing the underflow (what would be an over-released zombie in a non-GC > app). > > The first thing I'd look for is using CFRelease() when you should call > -release (or vise versa, and the same for retain): code written pre-GC would > treat those as equivalent, but in a GC or optional-GC world they need to be > treated as operating on distinct kinds of refcount. > > _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com