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From: sasdjb@unx.sas.com (David Biesack)
Newsgroups: comp.sys.apollo
Subject: Re: GCC bug?
Message-ID: <1990Sep14.205250.22057@unx.sas.com>
Date: 14 Sep 90 20:52:50 GMT
References: <1990Sep10.151351.20186@water.waterloo.edu> <1990Sep11.125319.21412@ncsuvx.ncsu.edu>
Organization: SAS Institute Inc.
Lines: 36

In article <1990Sep11.125319.21412@ncsuvx.ncsu.edu> jwb@cepmax.ncsu.edu writes:
> I'm using gcc version 1.37.1 (with John Vasta's patches) to compile
> the following program on a DN4500 (SR10.2, BSD4.3):
>      1	main()
>      2	{
>      3	  char x[10];
>      4	  long i;
>      5	
>      6	  for (i = 0; i <= 10; i++) x[i] = 'a';
>      7	
>      8	  return 0;
>      9	}
> Upon executing the program I get:
> % a.out
> unable to unwind stack because of invalid stack frame (process
> manager/process fault manager)

I suspect the fact that you are storing too many characters into x
is causing the crash. (The valid indices for x are 0 to 9, not 0 to 10 
as your loop generates.) If you get the same crash with the loop coded as:

   for (i = 0; i < 10; i++) x[i] = 'a'; 
               ^^^^^^
then I would worry.... I don't know all the ANSI C rules, but it would
suprise me if it says you are allowed write beyond static arrays!

> John Baugh
> jwb@cepmax.ncsu.edu

djb

-- 
David J. Biesack			SAS Institute, Inc.     
Object Programming Technology           SAS Campus Drive        
sasdjb@dev.sas.com                      Cary, NC 27513-2414     
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