Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!bellcore!decvax!decwrl!glacier!Navajo!rokicki
From: rokicki@Navajo.ARPA (Tomas Rokicki)
Newsgroups: net.micro.amiga
Subject: Manx C bug
Message-ID: <490@Navajo.ARPA>
Date: Thu, 3-Apr-86 18:02:23 EST
Article-I.D.: Navajo.490
Posted: Thu Apr  3 18:02:23 1986
Date-Received: Sat, 5-Apr-86 11:18:08 EST
Organization: Stanford University
Lines: 19

Finally been bitten by a bug in the new compiler.  The following
code will not work:

int test(a, b)
int a, b ;
{
   register long t = a * (long) b ;
}

The (long) coercion is required by the C standard to insure the
result is considered a long.  This only happens when both arguments
are int parameters and a long is required; taking out the coercion
yields the proper result in Aztec C.  (I don't think it should by
the standard C definition, though; an int expression assigned to
a long should yield a result with the bits sign-extended).

This bug did not happen in over 28,000 lines of C I have compiled
and successfully run under Manx C; it only happened when I rewrote
one 20-line library routine.  Thank God for small favors.   -tom