I've been trying to track down a bug that crashes a document-based cocoa
application which seems to be caused by referring to an object that no longer
exists, but thus far haven't succeeded in determining what that object is.
Yes, I've tried using the Zombies tool in Instruments but to no avail (perhaps
because of my inexperience using Instruments). The crash occurs very
inconsistently at the end of scanning a set of data in a completely ordinary
text file; i.e. sometimes I can scan the same set of data 10 or 15 times before
crashing, sometimes the crash occurs when the data are scanned for the first or
second time, but (almost?) always it occurs somewhere after the data have been
scanned (which is indicated by the line from the console shown below that reads
"the state at end of scanning is 4"). And I'm really clueless about what the
following lines from the console are telling me; any suggestions that you can
offer would be greatly appreciated.
I'm using Xcode 4.6 4H127 and OS X 10.7.5.
Boyd
5/25/13 9:59:21.381 AM SuperSpagedi: looks like there's a distance matrix
5/25/13 9:59:21.381 AM SuperSpagedi: the label is pop1
5/25/13 9:59:21.382 AM SuperSpagedi: the label is pop2
5/25/13 9:59:21.382 AM SuperSpagedi: the label is pop3
5/25/13 9:59:21.382 AM SuperSpagedi: the label is pop4
5/25/13 9:59:21.382 AM SuperSpagedi: the label is pop5
5/25/13 9:59:21.382 AM SuperSpagedi: the label is pop6
5/25/13 9:59:21.383 AM SuperSpagedi: the state at end of scanning is 4
5/25/13 9:59:35.465 AM com.apple.debugserver-199: 2 +63.911824 sec [0322/0303]:
error: ::ptrace (request = PT_THUPDATE, pid = 0x0323, tid = 0x2007, signal = 0)
err = Resource busy (0x00000010)
5/25/13 9:59:35.465 AM com.apple.debugserver-199: 3 +0.000197 sec [0322/0303]:
error: ::task_info ( target_task = 0x1b03, flavor = TASK_BASIC_INFO,
task_info_out => 0x7fff6a6d5fb0, task_info_outCnt => 10 ) err = (os/kern)
invalid argument (0x00000004)
5/25/13 9:59:35.468 AM Xcode: [MT] DVTAssertions: Warning in
/SourceCache/IDEKit/IDEKit-2109/Framework/Classes/Editor/IDEEditorContext.m:617
Details: Lost history for
x-xcode-disassembly://stack_frame?processID=803&threadID=1&frameID=0
Object: <IDEEditorContext: 0x402d72a40>
Method: -_greatestDocumentAncestorWasForgotten
Thread: <NSThread: 0x40010a220>{name = (null), num = 1}
Please file a bug at http://bugreport.apple.com with this warning message and
any useful information you can provide.
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