From 656b192c1672e4d4b874dfd3b510cd459406e50d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A9my=20Oudompheng?= <oudomphe@phare.normalesup.org>
Date: Fri, 13 Jul 2012 08:05:41 +0200
Subject: [PATCH] cmd/gc: reject use of ... with multiple-valued expressions.

Fixes #3334.

R=golang-dev, r
CC=golang-dev, remy
https://golang.org/cl/6350103
---
 src/cmd/gc/typecheck.c |  2 +-
 test/ddd1.go           | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/cmd/gc/typecheck.c b/src/cmd/gc/typecheck.c
index cc4faf5a7a..0335fe0c32 100644
--- a/src/cmd/gc/typecheck.c
+++ b/src/cmd/gc/typecheck.c
@@ -929,7 +929,7 @@ reswitch:
 			goto doconv;
 		}
 
-		if(count(n->list) == 1)
+		if(count(n->list) == 1 && !n->isddd)
 			typecheck(&n->list->n, Erv | Efnstruct);
 		else
 			typechecklist(n->list, Erv);
diff --git a/test/ddd1.go b/test/ddd1.go
index 1e070093c3..09d70c3de3 100644
--- a/test/ddd1.go
+++ b/test/ddd1.go
@@ -22,6 +22,16 @@ var (
 	_ = sum([]int{1}) // ERROR "\[\]int literal.*as type int|incompatible"
 )
 
+func sum3(int, int, int) int { return 0 }
+func tuple() (int, int, int) { return 1, 2, 3 }
+
+var (
+	_ = sum(tuple())
+	_ = sum(tuple()...) // ERROR "multiple-value"
+	_ = sum3(tuple())
+	_ = sum3(tuple()...) // ERROR "multiple-value" "not enough"
+)
+
 type T []T
 
 func funny(args ...T) int { return 0 }