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Re: Xcode 4 and LLDB problem
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Re: Xcode 4 and LLDB problem


  • Subject: Re: Xcode 4 and LLDB problem
  • From: Jim Ingham <email@hidden>
  • Date: Fri, 13 May 2011 18:04:20 -0700

Michael,

I haven't seen this.  If you can reproduce this in some small project you wouldn't mind sending to us, then please file a bug with the project and steps to reproduce the problem.

Note, you can switch the debugger from gdb to LLDB in the Run Scheme (option-click on the Run button, select the Run scheme and then the Info tab in the sheet that brings up, and you'll see a pull-down for debugger...)  If you switch to gdb do you have the same problem?

Jim

On May 13, 2011, at 10:49 AM, McLaughlin, Michael P. wrote:

> I’m new to Xcode 4 and even newer to LLVM 2 and LLDB but this problem using
> them still seems genuine.  [Cocoa app targeting Snow Leopard.]
>
> In a standard AppController delegate, I bring up a dialog with an OK button
> then use it modally via a menu item:
>
> - (IBAction)doDlg:(id)sender
> {
>   [NSApp runModalForWindow:mLabelDlg];
> }
>
> No problems to this point.  In fact, no problems at all unless I enable the
> breakpoints in the AppController code.  When I do, the modal dialog works as
> intended up until I hit the OK button which triggers an action in the
> AppController.
>
> - (IBAction)dlgOK:(id)sender
> {
>   [NSApp stopModalWithCode:0];
>   [mLabelDlg orderOut:self];
> ... // read two NSTextFields
>
> This action happens normally but almost immediately ( in DlgOK: ) I start to
> get error messages as follows:
>
> -[AppController count]: unrecognized selector sent to instance 0x2000a6580
> // sent to the AppController
>
> I get more of these for each step-over in the debugger (LLDB).  To repeat,
> with the breakpoints off, I do not get this error.  FWIW, if I copy the
> project and open it in Xcode 3.2.6, I do not get this error at all, even
> with breakpoints on.
>
> I have garbage-collection set to Supported but I do not have any
> retain/release statements.  Also, unchecking “Release when closed” on the
> dialog (in IB) has no effect.
>
> Any tips as to what might be going on here?
>
> Thanks.
>
> --
> Mike McLaughlin
>
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References: 
 >Xcode 4 and LLDB problem (From: "McLaughlin, Michael P." <email@hidden>)

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