[Vm-dev] Fwd: [squeak-dev] Image crashes just after start-up

[Andreas Raab]

One thing that comes to mind is that there have been BitBlt versions 
been flying around a while ago (distributed with the Freetype stuff). It 
would be worthwhile to remove *all* DLLs/SOs next to the Squeak VM to 
make sure none of these is accidentally picked up.

Cheers,
   - Andreas

John M McIntosh wrote:
> 
> fyi
> 
> Begin forwarded message:
>> From: David Röthlisberger <squeak at c3com.ch>
>> Date: April 16, 2008 1:15:57 AM PDT (CA)
>> To: johnmci at smalltalkconsulting.com
>> Subject: Re: [squeak-dev] Image crashes just after start-up
>>
>> Hi John,
>>
>>> Ok, so does this VM work with a base image, or it only a problem with 
>>> your image?
>>
>> The VM works well with a normal image, it's only a problem with this 
>> specific image.
>> And even for that image it worked well for a couple of weeks. Then I 
>> implemented an
>> application drawing a graph on a BalloonCanvas. Whenever I execute 
>> this application,
>> the image crashes. Sometimes directly after starting the application, 
>> but in most
>> cases I can use the app without problems, but when I then save the 
>> image after having
>> executed one specific feature, it crashes on image start-up.
>> I could track the error down to the method FormCanvas >> 
>> drawString:from:to:in:font:
>> color:.
>> Whenever this method gets executed with some specific parameters, then 
>> the crash will
>> happen. It seems to me that the bounds parameter has corrupt data, eg. 
>> numbers not
>> properly stored. But how this happens I don't know.
>>
>>
>>> usually points to a problem with the VM crashing either because the 
>>> image is corrupt or you
>>> have corrupted memory via an FFI call, or perhaps passing bad data to 
>>> the sound system.
>>
>> I don't use FFI, neither I pass data to the sound system, so probably 
>> this means that
>> the image is corrupt. I guess that some objects get created that are 
>> corrupt. But why
>> can this happen?
>>
>>> I also note you run Application Enhancer, perhaps turn that off and 
>>> see if it changes anything?
>>
>> ok, I turned it off, but this doesn't make a difference.
>>
>>
>> David
> 
> -- 
> ===========================================================================
> John M. McIntosh <johnmci at smalltalkconsulting.com>
> Corporate Smalltalk Consulting Ltd.  http://www.smalltalkconsulting.com
> ===========================================================================
> 
>