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From: bright@nazgul.UUCP (Walter Bright)
Newsgroups: comp.lang.c++
Subject: Re: Zortech debugger
Message-ID: <228@nazgul.UUCP>
Date: 16 Jan 91 17:56:47 GMT
References: <1991Jan11.013822.4214@aucs.AcadiaU.ca>
Reply-To: bright@nazgul.UUCP (Walter Bright)
Organization: Zortech, Seattle
Lines: 13

In article <1991Jan11.013822.4214@aucs.AcadiaU.ca> 880716a@aucs.AcadiaU.ca (Dave Astels) writes:
/My program uses a BISON generated parser.  It works fin when given small
/input files.  However it locks up when given a large (realisticly sized)
/file.  When I run it in the debugger (ZDB 2.0) it works wonderfully.  No
/problems at all!
/Does anyone have any suggestions as to what could be causing this sort of
/behavior?

It is very probably an uninitialized variable being referenced. The variable
will start out at different values when run under DOS or under a debugger.
Unfortunately, these are one of the most difficult problems to track down.
I suggest putting a few printf's into your program at strategic points and
try and narrow down where the problem might be.