Re: Problem with NSTextView

[Eric Wasylishen]

Hi,
Based on Sebastain's bactrace, I think it's a spurious warning: the method 
isn't actually being called with an incorrect signature, the menu update code 
is just calling class_respondsToSelector() to check if an object responds to 
the selector "copy:". The selector being passed probably comes from nib 
loading, so any type info is random.

Eric

> 
> #0  fprintf (fp=0x2d086310, fmt=0x2ccc6c6f "Calling [%s %c%s] with incorrect 
> signature.  Method has %s, selector has %s\n")
>    at /usr/src/lib/libc/stdio/fprintf.c:44
> #1  0x0ccdb448 in objc_selector_type_mismatch (cls=0xcfbd5274, 
> selector=0xcfbd5274, result=0xcfbd5274) at sendmsg2.c:37
> #2  0x0ccdc22c in objc_get_slot (cls=Unhandled dwarf expression opcode 0x0
> ) at sendmsg2.c:307
> #3  0x0ccdc26f in class_respondsToSelector (cls=dwarf2_read_address: 
> Corrupted DWARF expression.
> ) at sendmsg2.c:322
> #4  0x0a102e78 in -[NSObject respondsToSelector:] (self=dwarf2_read_address: 
> Corrupted DWARF expression.
> ) at NSObject.m:2096
> #5  0x09977ff1 in -[NSApplication(Private) 
> _targetForAction:keyWindow:mainWindow:] (self=0x8a57a984, _cmd=0x29805088, 
>    aSelector=0x8be49550, keyWindow=0x7fbfe304, mainWindow=0x7fbfe304) at 
> NSApplication.m:3897
> #6  0x0996dae1 in -[NSApplication targetForAction:] (self=0x8a57a984, 
> _cmd=0x29804d08, aSelector=0x8be49550)
>    at NSApplication.m:2290
> #7  0x0996d98c in -[NSApplication targetForAction:to:from:] (self=0x8a57a984, 
> _cmd=0x29837640, theAction=0x8be49550, 
>    theTarget=0x0, sender=0x84fdf904) at NSApplication.m:2275
> #8  0x09b2891c in -[NSMenu update] (self=0x80ffd844, _cmd=0x29837190) at 
> NSMenu.m:1151
> #9  0x09b287f2 in -[NSMenu update] (self=0x81921144, _cmd=0x29805228) at 
> NSMenu.m:1146
> #10 0x09969901 in -[NSApplication run] (self=0x8a57a984, _cmd=0x297fe900) at 
> NSApplication.m:1570
> #11 0x0992466d in NSApplicationMain (argc=1, argv=0xcfbd5c14) at 
> Functions.m:91
> #12 0x1c005ec7 in ___start ()
> #13 0x1c005e42 in _start ()
> 
> 
> Sebastian
> 
>> 
>> On 28 Jan 2012, at 13:17, Sebastian Reitenbach wrote:
>> 
>>> Method has v12@0:4@8, selector has @12@0:4@8
>> 
>> This looks potentially dangerous.  The caller is expecting the method to 
>> return an object, but the method is a standard IBAction (i.e. returning 
>> void).  If the caller does anything with the return value, then it will 
>> likely crash...
>> 
>> David
>> 
>> 
>> 
>> -- Sent from my Difference Engine
>> 
>> 
>> 
> 
> 
> 
> 
> 
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