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

> From: David Röthlisberger <[hidden email]>
> Date: April 16, 2008 1:15:57 AM PDT (CA)
> To: [hidden email]
> 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

>
> fyi
>
> Begin forwarded message:
>> From: David Röthlisberger <[hidden email]>
>> Date: April 16, 2008 1:15:57 AM PDT (CA)
>> To: [hidden email]
>> 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 <[hidden email]>
> Corporate Smalltalk Consulting Ltd.  http://www.smalltalkconsulting.com
> ===========================================================================
>
>