From 77817e08d5681a29268adf7deb36b3e2ba2a8b2c Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@golang.org>
Date: Thu, 29 Apr 2010 16:07:14 -0700
Subject: [PATCH] gc: never include ( ) on singleton func return type

Fixes #749.

R=ken2
CC=golang-dev
https://golang.org/cl/963043
---
 src/cmd/gc/subr.c        | 12 ++++--------
 test/fixedbugs/bug269.go | 18 ++++++++++++++++++
 2 files changed, 22 insertions(+), 8 deletions(-)
 create mode 100644 test/fixedbugs/bug269.go

diff --git a/src/cmd/gc/subr.c b/src/cmd/gc/subr.c
index 34b5498420..b0192adf33 100644
--- a/src/cmd/gc/subr.c
+++ b/src/cmd/gc/subr.c
@@ -1227,14 +1227,10 @@ Tpretty(Fmt *fp, Type *t)
 				fmtprint(fp, " ?unknown-type?");
 				break;
 			}
-			if(t1->etype != TFIELD) {
-				fmtprint(fp, " %T", t1);
-				break;
-			}
-			if(t1->sym == S) {
-				fmtprint(fp, " %T", t1->type);
-				break;
-			}
+			if(t1->etype == TFIELD)
+				t1 = t1->type;
+			fmtprint(fp, " %T", t1);
+			break;
 		default:
 			t1 = getoutargx(t)->type;
 			fmtprint(fp, " (");
diff --git a/test/fixedbugs/bug269.go b/test/fixedbugs/bug269.go
new file mode 100644
index 0000000000..4cc0408c37
--- /dev/null
+++ b/test/fixedbugs/bug269.go
@@ -0,0 +1,18 @@
+// $G $D/$F.go && $L $F.$A && ./$A.out
+
+// 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.
+
+// http://code.google.com/p/go/issues/detail?id=749
+
+package main
+
+func f() (ok bool) { return false }
+
+func main() {
+	var i interface{}
+	i = f
+	_ = i.(func()bool)
+	_ = i.(func()(bool))
+}
-- 
2.50.0