Re: Apps crash on startup

[Richard Frith-Macdonald]

On 27 Oct 2010, at 22:53, Riccardo Mottola wrote:

> Hi,
> 
> since quite recent changes (less than a week I suppose) on FreeBSD with gcc 
> all apps do crash. Here a stacktrace for Ink:
> 
> gs_objc_msg_forward (sel=0x283dbeb8) at GSFFIInvocation.m:137
> 137       c = receiver->isa;
> Current language:  auto; currently minimal
> (gdb) bt
> #0  gs_objc_msg_forward (sel=0x283dbeb8) at GSFFIInvocation.m:137
> #1  0x28856e75 in objc_msg_lookup () from /usr/lib/libobjc.so.4
> #2  0x2821d2e9 in -[NSMenuItemCell calcSize] (self=0x29843848, 
> _cmd=0x283dbf00)
>    at NSMenuItemCell.m:315
> #3  0x2821c491 in -[NSMenuItemCell stateImageWidth] (self=0x29843848,
>    _cmd=0x283d9248) at NSMenuItemCell.m:380
> #4  0x282167d3 in -[NSMenuView sizeToFit] (self=0x2902a308, _cmd=0x283d9268)
>    at NSMenuView.m:751
> #5  0x28214a63 in -[NSMenuView rectOfItemAtIndex:] (self=0x2902a308,
>    _cmd=0x283d9270, index=7) at NSMenuView.m:943
> #6  0x28212389 in -[NSMenuView setNeedsDisplayForItemAtIndex:] (
>    self=0x2902a308, _cmd=0x283d90c8, index=7) at NSMenuView.m:1010
> #7  0x28212942 in -[NSMenuView itemChanged:] (self=0x2902a308,
>    _cmd=0x283d9028, notification=0x29863fa8) at NSMenuView.m:460
> #8  0x285d245e in -[NSNotificationCenter _postAndRelease:] (self=0x29032dd8,
>    _cmd=0x287f58c8, notification=0x29863fa8) at NSNotificationCenter.m:1161
> #9  0x285d1a8b in -[NSNotificationCenter postNotification:] (self=0x29032dd8,
>    _cmd=0x283d6548, notification=0x29863fa8) at NSNotificationCenter.m:1190
> #10 0x2820ddd4 in -[NSMenu itemChanged:] (self=0x29345d88, _cmd=0x283da898,
>    anObject=0x29837978) at NSMenu.m:846
> #11 0x282187b0 in -[NSMenuItem setAction:] (self=0x29837978, _cmd=0x28396468,
>    aSelector=0x29015948) at NSMenuItem.m:477
> #12 0x2817fa18 in -[NSNibControlConnector establishConnection] (
> 
> 
> Ideas? Riccardo

Nothing in the ChangeLog, but I found that David had modified GSFFIInvocation.m 
so that it dereferences the null pointer 'receiver' at line 137 as shown in 
your stacktrace.
I reverted to the previous version of the code.
I guess it must have been an accidental commit on his part, since there was a 
clear comment immediately before that line warning that 'receiver' can be a 
null pointer.