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From: gwyn@BRL.ARPA (VLD/VMB)
Newsgroups: net.lang.c
Subject: Re:  SUN C compiler bug?
Message-ID: <2190@brl-smoke.ARPA>
Date: Sat, 29-Mar-86 00:28:52 EST
Article-I.D.: brl-smok.2190
Posted: Sat Mar 29 00:28:52 1986
Date-Received: Mon, 21-Apr-86 00:32:37 EST
Sender: news@brl-smoke.ARPA
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When dissimilar types occur in an expression, they are converted
into comparable types according to rules you can find in K&R,
better in Harbison&Steele, better still in the X3J11 draft.  The
conversion involves widening smaller types, not shrinking fatter
ones.  Since 128 is an (int), the (char) x should have been
widened to (int) before the < comparison.  On the other hand,
you have the problem that signed chars will never widen to
something >= 128 (assuming 8-bit byte), so the loop would never
terminate.  Yes it's a bug, but the code is buggy too.