RE: Strange Bug

From: Sarah Officer <>
Date: Tue, 28 Feb 1995 12:07:08 -0700 (MST)

> Subject: Strange bug
> writes:
> Hum I'm using stklos, and I sometimes have strange problems :
> I read a file which consists of lists.
> On some unpredictable basis, elements of this list are replaced by
> internal objects of stklos
> Last error occured 2 times (with different replacement), and the third
> time there was no problem. (every time I exit from stk a start again).
> It seems that this occurs when using a lot of code (I intensively use
> methods but no tk objects yet)
> I my opinion it is a memory jam...
> Has somebody experienced such strange things ??
> f.g.
This is exactly the problem we have been having with an application
running on STk-2.1.4 on both LINUX & SUN4 operating systems. We read
and write alists, and on apparently random occaisions, we see elements
of the alist replaced by <#some-stklos-type> or some other garbage
(not a stklos object class).

My recent posts regarding tracing memory allocation were attempts to find
a way to trace this bug. We also observe that the error occurs only when
using 'a lot of code', i.e. a large test case. Because my coworkers and
I were sidetracked on some other projects, we haven't had the
opportunity to track this down by setting *gc-verbose*, but we think
the problem occurs after garbage collection. We will soon try some tests
on STk-2.1.6 to see if the problem goes away.

What machine, operating system, and version of STk are you running with?
Definitely let us know if you solve this problem!

Sarah Officer
Received on Tue Feb 28 1995 - 20:06:28 CET

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