I have subclassed NSSearchField, implementing a method which appends a new search to recent searches after the user has entered text into it. Three times during the last year, I’ve seen this method crash where it sets the new array of searches into super’s recentSearches,
[self setRecentSearches:recentSearches] ; When I debug into that method, lldb tells me that both ‘self’ and ‘recentSearches’ are valid objects, and that the latter is an __NSArrayM. In other words, all looks OK. Here is the call stack: #0 in strlen () #1 in strdup () #2 in objc_class::nameForLogging() () #3 in cache_t::bad_cache(objc_object*, objc_selector*, objc_class*) () #4 in objc_msgSend_corrupt_cache_error () #5 in safeARCWeaklyStore () #6 in -[NSMenuItem setTarget:] () #7 in -[NSMenuItem copyWithZone:] () #8 in -[NSSearchFieldCell(NSSearchFieldCell_Local) _updateSearchMenu] () #9 in __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ () #10 in _CFXNotificationPost () #11 in -[NSNotificationCenter postNotificationName:object:userInfo:] () #12 in -[SSYSearchField appendToRecentSearches:] at SSYSearchField.m:53 #13 in -[CntntViewController search:] at /CntntViewController.m:351 #14 in -[BkmxDocWinCon search:] at BkmxDocWinCon.m:2907 The highest line in the stack in my code is #12. Line #11 indicates that the crash occurs when AppKit attempts to post a notification, which I suspect is a KVO notification. (But is NSNotificationCenter used in KVO?) When I debug into that NSNotificationCenter method, unfortunately lldb gives me the all-too-familiar “can’t read register" disappointment: (lldb) po $rdi error: Couldn't materialize: couldn't read the value of register rdi Errored out in Execute, couldn't PrepareToExecuteJITExpression (lldb) po $rdx error: Couldn't materialize: couldn't read the value of register rdx Errored out in Execute, couldn't PrepareToExecuteJITExpression (lldb) po $rcx error: Couldn't materialize: couldn't read the value of register rcx Errored out in Execute, couldn't PrepareToExecuteJITExpression (lldb) po $r8 error: Couldn't materialize: couldn't read the value of register r8 Errored out in Execute, couldn't PrepareToExecuteJITExpression (lldb) po $r9 error: Couldn't materialize: couldn't read the value of register r9 Errored out in Execute, couldn't PrepareToExecuteJITExpression I have searched my code thoroughly for anywhere that I am observing the ‘recentSearches’ attribute of anything, but have found nothing. Does anyone have any ideas? The ‘recentSearches’ setter and getter have been available in the superclass NSSearchField since Mac OS X 10.3. One weird thing is that when I option-click on -setRecentSearches: in Xcode, it gives me the Swift declaration and says that it is available in OS X 10.10 or later. I don’t see any other methods behaving like that. Thanks, Jerry Krinock _______________________________________________ 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
