gc: bug308

confused by using isddd for both ONAME and OCALL

Fixes #1136.

R=ken2
CC=golang-dev
https://golang.org/cl/2314043

src/cmd/gc/typecheck.c

@@ -1550,7 +1550,7 @@ typecheckaste(int op, int isddd, Type *tstruct, NodeList *nl, char *desc)
 	for(tl=tstruct->type; tl; tl=tl->down) {
 		t = tl->type;
 		if(tl->isddd) {
-			if(nl != nil && nl->n->isddd && !isddd) {
+			if(nl != nil && nl->n->op == ONAME && nl->n->isddd && !isddd) {
 				// TODO(rsc): This is not actually illegal, but it will help catch bugs.
 				yyerror("to pass '%#N' as ...%T, use '%#N...'", nl->n, t->type, nl->n);
 				isddd = 1;

test/fixedbugs/bug308.go

+// $G $D/$F.go
+
+// Copyright 2010 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// issue 1136
+
+package main
+
+import "fmt"
+
+func log1(f string, argv ...interface{}) {
+	fmt.Printf("log: %s\n", fmt.Sprintf(f, argv...))
+}
+
+func main() {
+	log1("%d", 42)
+}