Re: AppleScript - occasional crashes on Leopard

FROM : Mark Piccirelli
DATE : Tue Apr 22 22:16:12 2008

Yes. But we intend to fix it in a software update. (And I can't say 
anything more specific than that. A fix isn't a fix until it's shipped.)

               -- Mark

On Apr 22, 2008, at 1:01 PM, Michael Watson wrote:

> Mark,
>
> So GC + NSAppleScript == avoid for now?
>
>
> --
> m-s
>
> On 22 Apr, 2008, at 15:53, Mark Piccirelli wrote:

>> Is this a garbage-collected app? If so the crash is a known bug.
>>
>>                 -- Mark
>>
>> On Apr 22, 2008, at 10:47 AM, Steve Cronin wrote:

>>> Folks;
>>>
>>> I've seen some inconsistent behavior on AppleScript running under 
>>> Leopard.
>>>
>>> Here's an example:
>>> ...
>>>     NSString *theScript =@"some valid dynamic script text"
>>>     NSDictionary *errorDict = [NSDictionary dictionary];
>>>     NSAppleScript *appleScriptObject = [[NSAppleScript alloc] 
>>> initWithSource:theScript];    
>>>     NSAppleEventDescriptor *eventDescriptor = [appleScriptObject 
>>> executeAndReturnError: &errorDict];
>>> ...
>>>
>>> will OCCASIONALLY crash at the NSAppleEventDescriptor specification:
>>>
>>> #0    0x932c3d5c in getDescDataType
>>> #1    0x932c7ab7 in aeCoerceDescInternal
>>> #2    0x932cc055 in AECoerceDesc
>>> #3    0x1d4a8150 in ComponentCoerceDesc
>>> #4    0x1d48cbec in ASCompile
>>> #5    0x903bacb8 in CallComponentFunction
>>> #6    0x1d487ae2 in AppleScriptComponent
>>> #7    0x1d4a3927 in AGenericManager::HandleOSACall
>>> #8    0x903755cd in CallComponentDispatch
>>> #9    0x953fc513 in OSACompile
>>> #10    0x93e6edaf in -[NSAppleScript compileAndReturnError:]
>>> #11    0x93e6f096 in -[NSAppleScript(NSPrivate) 
>>> _executeWithMode:andReturnError:]
>>> #12    0x93e6ee51 in -[NSAppleScript executeAndReturnError:]
>>>
>>> Is there a new/better means in Leopard of accomplishing the 
>>> execution of dynamic scripts?
>>> NO the crash is NOT related to the validity of the script, of this 
>>> I am absolutely certain!  (It only crashes sometimes using the 
>>> same resulting script!!)
>>> Is a dual processor Intel creating a risk here?
>>> Is there something better I can do to handle the error?
>>> Why should I have to use a @try block here?
>>> I thought that was what the executeAndReturnError  parameter was 
>>> for!!  But I don't get a chance to examine the errorDict.
>>>
>>> It will crash only every so often....
>>> My hunch is that crashes are more likely when machine is under 
>>> load and memory swapping might be involved.
>>> This is running on a 4G MacBook...
>>>
>>> Any wisdom appreciated!
>>> Steve
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>>
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>