The PR diff I committed recently had one bug noticed by

Joe Marcus Clarke <marcus@FreeBSD.ORG>, subshells could lose a
non-zero exit status.

This commit is Joe's proposed patch.  Thanks!

I verified that the problem Joe found is fixed and I ran a full world
with this patch.

I don't plan to ever commit language patches to /bin/sh again.  It is
a minefield too big to navigate without a full-time committment, which
I am not willing to do on our /bin/sh.

Under normal circumstances I would recommend using NetBSD's sh which
has a lot of language fixes (like the ones what these patches were
about) but unfortunately they had implemented broken signal behaviour
for shellscript containing interactive programs.  Similar issues apply
to pdksh which is OpenBSD's sh.

From my perspective bash2 is the only really working bourne sh out
there and that one is GPLed.  Oh well.

bin/sh/eval.c

@@ -273,7 +273,8 @@ evaltree(union node *n, int flags)
 	if (pendingsigs)
 		dotrap();
 	if ((flags & EV_EXIT) || (eflag && exitstatus 
-	    && !(flags & EV_TESTED) && (n->type == NCMD)))
+	    && !(flags & EV_TESTED) && (n->type == NCMD || 
+	    n->type == NSUBSHELL)))
 		exitshell(exitstatus);
 }