[plt-scheme] windows aborts Drscheme

From: jos koot (jos.koot at telefonica.net)
Date: Sat Jan 20 17:48:21 EST 2007

Hi Matthew
I'll send you my program in a seperate mail, for it wont be accepted by the 
PLT discussion list. It's too big.
My program (in fact a sequence of about 16 test programs) does not crash 
when I open the main scm file in a clean system and press the run button 
without editing anything and without other applications running. 50 times 
out of 100 the program, which takes about 200 seconds, crashes when I 
meanwhile open internet explorer and outlook express just to abide my time 
waiting for the program to finish. Today I runned the program about 20 times 
and I estimate it crashed (or windows made it crash) more than 10 times.
Further data are: The program consumes almost 100% cpu time, and a maximum 
of about 0.6 Gbyte (my machine has 1 Gbyte Ram) I have chosen the memory 
requirements such as to prevent Windows from trashing (after trashing by a 
PLT scheme program, Windows keeps having trashing problems even after 
closing all MrEd based applications, but to me this seems rather a Windows 
problem than a DrScheme problem)
I always run my program with language MzScheme without debugging.
Thanks again for your attention, Jos Koot.

----- Original Message ----- 
From: "Matthew Flatt" <mflatt at cs.utah.edu>
To: "jos koot" <jos.koot at telefonica.net>
Cc: "PLT-list" <plt-scheme at list.cs.brown.edu>
Sent: Saturday, January 20, 2007 11:02 PM
Subject: Re: [plt-scheme] windows aborts Drscheme

> At Sat, 20 Jan 2007 13:56:35 +0100, "jos koot" wrote:
>> Windows sometimes aborts DrScheme while running, particularly when I
>> concurrently use other applications.
> Does Drscheme crash once every day or two, or once every hour or two?
>> I use DrScheme, version full 369.5-svn17jan2007, english (installed by
>> full-369.5-bin-i386-win32.exe) with Microsoft Windows XP, Home Edition,
>> Version 2002, Service Pack 2. I run the program by opening the scm file 
>> and
>> pressing the run button. I never saw this problem in previous versions of
>> DrScheme.
> The problem is almost certainly due to the switch from DrSchemeCGC to
> DrScheme3m as "DrScheme.exe". That is, it's likely a bug in the way
> that MzScheme/MrEd manages memory.
> Your report is already useful, and any further help you can provide on
> how to reproduce the crash would be much appreciated. Of course, a
> sequence of steps that always crashes is always preferred, but we can
> often make progress with other information. For example, if you only
> run one program in DrScheme before it crashes, and if you can send me
> the program, then that may help us narrow down the problem. If you know
> it's enough to click "Run" a few times without editing, or if DrScheme
> crashes without you ever clicking "Run", that's also a useful kind of
> information.
> Thanks,
> Matthew

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