As far as I know, Apple is encouraging developers to move to Instruments.
Can you use instruments with: Object Allocation or Leaks instead?
Jesper

On Dec 24, 2009, at 3:12 PM, Richard Somers wrote:

> Start with an Apple core data document based application project  
> template. Build and start with performance tool MallocDebug. Launch  
> and check for leaks. Back in core data app save file. Update to check  
> for leaks and MallocDebug will hang. Happens on PPC and Intel, Xcode  
> 3.1.4, MallocDebug 1.7.1.
> 
> Anyone else having trouble with this?
> 
> --Richard
> 
> Partial crash report
> 
> Date/Time:      2009-12-24 15:58:29 -0700
> OS Version:     10.5.8 (Build 9L30)
> Architecture:   ppc
> Report Version: 4
> 
> Command:        MallocDebug
> Path:           /Developer/Applications/Performance Tools/ 
> MallocDebug.app/Contents/MacOS/MallocDebug
> Version:        1.7.1 (89)
> Build Version:  331
> Project Name:   MallocDebug
> Source Version: 890000
> Parent:         Xcode [129]
> 
> PID:            561
> Event:          hang
> Time:           6.62s
> Steps:          31
> 
> Process:        MallocDebug [561]
> Path:           /Developer/Applications/Performance Tools/ 
> MallocDebug.app/Contents/MacOS/MallocDebug
> 
>   ADDRESS         BINARY
>   00001000        /Developer/Applications/Performance Tools/ 
> MallocDebug.app/Contents/MacOS/MallocDebug
>   00027000        /Developer/Applications/Performance Tools/ 
> MallocDebug.app/Contents/MacOS/../../../../../Library/ 
> PrivateFrameworks//DevToolsRemoteClient.framework/Versions/A/ 
> DevToolsRemoteClient
>   00065000        /System/Library/PrivateFrameworks/vmutils.framework/ 
> Versions/A/vmutils
>   000ca000        /Developer/Applications/Performance Tools/ 
> MallocDebug.app/Contents/MacOS/../../../../../Library/ 
> PrivateFrameworks//DevToolsFoundation.framework/Versions/A/ 
> DevToolsFoundation
>   0010c000        /System/Library/PrivateFrameworks/ 
> Symbolication.framework/Versions/A/Symbolication
>   00197000        /System/Library/PrivateFrameworks/ 
> DebugSymbols.framework/Versions/A/DebugSymbols
>   0330e000        /System/Library/CoreServices/RawCamera.bundle/ 
> Contents/MacOS/RawCamera
> 
>   Thread id:      2c18af8
>   User stack:
>   31 ??? [0x20d0]
>   31 _NSApplicationMain + 444 (in AppKit) [0x9645329c]
>   31 -[NSApplication run] + 804 (in AppKit) [0x964828d8]
>   31 -[NSApplication sendEvent:] + 3260 (in AppKit) [0x96515680]
>   31 -[NSWindow sendEvent:] + 4516 (in AppKit) [0x965422dc]
>   31 -[NSControl mouseDown:] + 808 (in AppKit) [0x96543a18]
>   31 -[NSButtonCell trackMouse:inRect:ofView:untilMouseUp:] + 520 (in  
> AppKit) [0x965440dc]
>   31 -[NSCell trackMouse:inRect:ofView:untilMouseUp:] + 1588 (in  
> AppKit) [0x965447a4]
>   31 -[NSControl sendAction:to:] + 96 (in AppKit) [0x9654528c]
>   31 -[NSApplication sendAction:to:from:] + 108 (in AppKit)  
> [0x96545358]
>   31 ??? [0x6fcc]
>   31 ??? [0x645c]
>   31 ??? [0x15974]
>   31 ??? [0x2738]
>   31 _mach_msg_trap + 8 (in libSystem.B.dylib) [0x955e81f8]
> END
> 
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