From a0a14b98faf07d87a52c13b5ff08547703598972 Mon Sep 17 00:00:00 2001
From: Ken Thompson <ken@golang.org>
Date: Thu, 4 Dec 2008 16:05:40 -0800
Subject: [PATCH] empty switches -- bug128

R=r
OCL=20520
CL=20522
---
 src/cmd/6g/gen.c  | 2 ++
 src/cmd/gc/walk.c | 4 +---
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/cmd/6g/gen.c b/src/cmd/6g/gen.c
index 980122b0eb..137ad7ae0f 100644
--- a/src/cmd/6g/gen.c
+++ b/src/cmd/6g/gen.c
@@ -536,6 +536,8 @@ swgen(Node *n)
 	c1 = listfirst(&save1, &n->nbody);
 	while(c1 != N) {
 		setlineno(c1);
+		if(c1->op == OEMPTY)
+			break;
 		if(c1->op != OCASE) {
 			if(s0 == C && dflt == P)
 				yyerror("unreachable statements in a switch");
diff --git a/src/cmd/gc/walk.c b/src/cmd/gc/walk.c
index 1c87e05eb0..da5917aa7f 100644
--- a/src/cmd/gc/walk.c
+++ b/src/cmd/gc/walk.c
@@ -277,9 +277,7 @@ loop:
 		if(top != Etop)
 			goto nottop;
 
-		if(!casebody(n->nbody))
-			yyerror("switch statement must have case labels");
-
+		casebody(n->nbody);
 		if(n->ntest == N)
 			n->ntest = booltrue;
 		walkstate(n->ninit);
-- 
2.50.0