Re: Funky Xcode crashing-my-app behavior
Re: Funky Xcode crashing-my-app behavior
- Subject: Re: Funky Xcode crashing-my-app behavior
- From: Christopher Friesen <email@hidden>
- Date: Thu, 7 Aug 2008 14:18:54 -0700
Which version of Xcode are you using? We recently stopped evaluating
expressions when the expressions window is closed.
-ChrisF
On Aug 6, 2008, at 9:25 PM, Randall Meadows wrote:
On Aug 6, 2008, at 7:25 PM, Ken Thomases wrote:
I wonder if you don't have something in your Expressions window
that's being repeatedly re-evaluated. If it's an expression
including a function or method call, it might be operating on a
stale or invalid pointer and causing your exception.
AAAAAHHHHHHH!!!!!! In the words of a famous TV personality: "I LOVE
YOU MAN!!!"[1]
I've re-installed Xcode twice, and was about to migrate to a new
user account (where the problem wasn't occurring) and deal with the
attendant headaches of doing so. But one stroke of the delete key
in the Expressions window was all that was needed. I hardly *ever*
use that window; this morning was probably the first time in 4-5
months, and then I closed it and thought nothing more of it.
Thank you thank you thank you! If we ever meet at WWDC, C4, etc.,
Ken, drinks are on me.[2]
randy
[1] <http://www.youtube.com/watch?v=AYNNH8WX9Eo>
[2] You'll have to remind me, though, because as I've just shown, my
memory ain't what it used to be. ;)
Among the things you reported deleting, you did not say if you
deleted the $USER.* files within the project package.
Cheers,
Ken
On Aug 6, 2008, at 7:07 PM, Randall Meadows wrote:
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):
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