Re: Funky Xcode crashing-my-app behavior
Re: Funky Xcode crashing-my-app behavior
- Subject: Re: Funky Xcode crashing-my-app behavior
- From: Randall Meadows <email@hidden>
- Date: Wed, 6 Aug 2008 18:07:22 -0600
I'll do that, but in the mean time, here's one more data point:
On the same project, not even rebuilding it, everything works just
fine on another user account on the same machine.
I've tried re-installing Xcode from scratch (using the uninstall-
devtools script), and deleted everything else I can think of/find,
including com.apple.Xcode.plist, the /Library/AppSupp and ~/Library/
AppSupp Xcode and Developer stuff, caches galore, but still my main
account is screwed, another clean account is not.
randy
On Aug 6, 2008, at 4:08 PM, Jim Ingham wrote:
<function called from gdb> is just what it sounds like, for some
reason gdb is calling a function in the program being debugged. gdb
does that on the stack of the current thread, and this is just the
marker for where the gdb controlled part of the stack starts.
It looks like maybe this is an NSMenu data formatter, since its
calling some NSMenu introspection function. Calling that function
is raising an NSException, and that's in turn hitting your
breakpoint. I think if you just continue here, it should be okay.
If that doesn't work, do:
(gdb) frame 12
(gdb) return
It's odd that something a data formatter is doing is causing an
exception to be raised. If you can file a bug with the Xcode/gdb
log included (you can turn on this logging in the Debugging pane of
the Xcode Preferences) I can tell for sure what we were trying to do
when we went to call this, and maybe why it went wrong.
Thanks,
Jim
On Aug 6, 2008, at 2:01 PM, Randall Meadows wrote:
Ok, strange subject line, I know; I'm not sure really how to phrase
it.
I have a menu item "Batch Edit", whose sent action is "batchEdit:",
to First Responder. I have "batchEdit:" defined in a window
controller.
"All of a sudden"* when I select that menu item (I get a slightly
different stack trace depending on whether I select it using the
mouse or command key, but the top 16 [0-15] entries in the stack
trace remain the same either way), "batchEdit:" is called, and a
breakpoint on the first line is hit. The first line is
NSLog(@"entering batchEdit:");. By the time that BP is hit, this
is printed in the console window:
2008-08-06 14:43:28.378 Assets Manager[3332:817] *** -
[NSApplication length]: unrecognized selector sent to instance
0x114a70
When I stop over the NSLog call, I end up with this crash (I have
BPs set on [NSException raise] and objc_exception_throw):
#0 0x97213c66 in -[NSException raise]
#1 0x00072f2a in -[NSExceptionHandler _handleException:mask:]
#2 0x000731c8 in NSExceptionHandlerExceptionRaiser
#3 0x943c00fb in objc_exception_throw
#4 0x9721b34a in -[NSObject doesNotRecognizeSelector:]
#5 0x9721994c in ___forwarding___
#6 0x97219a12 in __forwarding_prep_0___
#7 0x971b1b57 in CFStringGetLength
#8 0x971bc7cf in CFStringCompareWithOptionsAndLocale
#9 0x9614dc06 in -[NSString compare:options:range:]
#10 0x9616c380 in -[NSString compare:]
#11 0x92feb0b1 in -[NSMenu indexOfItemWithTitle:]
#12 0x00002b30 in <function called from gdb>
#13 0x930bdc23 in -[NSApplication sendAction:to:from:]
#14 0x9316c660 in -[NSMenu performActionForItemAtIndex:]
#15 0x9316c365 in -[NSCarbonMenuImpl
performActionWithHighlightingForItemAtIndex:]
#16 0x9316bfeb in -[NSMenu performKeyEquivalent:]
#17 0x9316a890 in -[NSApplication _handleKeyEquivalent:]
#18 0x93087853 in -[NSApplication sendEvent:]
#19 0x92fe4e27 in -[NSApplication run]
#20 0x92fb2030 in NSApplicationMain
#21 0x00004797 in main at main.m:13
Notice that "batchEdit:" is no longer in the stack trace. Where'd
it go? (It's not shown in any of the (2) threads in the debugger.)
And what is that #12 <function called from gdb>? Why is gdb
calling [NSMenu indexOfItemWithTitle:]? There is NOT a breakpoint
action set.
The log message is NOT printed in the console.
This is a Debug configuration, optimization = -O0 (none). Clean
build. I've restarted Xcode, and the machine, even reverted the
project file, but yet the problem persists.
*Yes, I know *something* must have changed, but dang if I can
figure out what. Any ideas of what to look for?
Thanks.
randy
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