Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!emory!att!iuvax!silver!russ
From: russ@silver.ucs.indiana.edu (Jeff Russ)
Newsgroups: comp.unix.ultrix
Subject: Re: cc core dumping
Message-ID: <65546@iuvax.cs.indiana.edu>
Date: 18 Oct 90 19:40:59 GMT
References: <1990Oct15.201820.7348@ircam.ircam.fr>
Sender: news@iuvax.cs.indiana.edu
Organization: Indiana University, Bloomington IN.
Lines: 16

Our 5840 running Ultrix 4.0 also dumps core occassionaly.  If I keep
repeating the cc command it will eventually compile okay.  It looks like
the logic for certain instructions in the machine needs to be warmed up for
a compile to succeed. (My old PDP8s at home sometimes have the same problem).

We currently see two different types of errors when it aborts:

	% cc -O frac.c
	Fatal error in: /usr/lib/cmplrs/cc/uopt Segmentation fault - core dumped

	% cc -O frac.c
	pid 11309 (uopt2.1) was killed on unaligned access, at pc 0x1a
	Fatal error in: /usr/lib/cmplrs/cc/uopt Bus error - core dumped

The last one occurrs less frequently.  The code compiles without any problems
on a 5200 running Ultrix 4.0.