bug184 - assignment compatibility in unpacked multireturn

R=ken
OCL=32890
CL=32894

1 files changed, 51 insertions, 0 deletions

diff --git a/test/fixedbugs/bug184.go b/test/fixedbugs/bug184.go
new file mode 100644
index 000000000..95a76d081
--- /dev/null
+++ b/test/fixedbugs/bug184.go
@@ -0,0 +1,51 @@
+// $G $D/$F.go && $L $F.$A && ./$A.out
+
+// Copyright 2009 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.
+
+package main
+
+import "fmt"
+
+type Buffer int
+func (*Buffer) Read() {
+}
+
+type Reader interface { Read() }
+
+func f() *Buffer {
+	return nil
+}
+
+func g() Reader {
+	// implicit interface conversion in assignment during return
+	return f()
+}
+
+func h() (b *Buffer, ok bool) {
+	return
+}
+
+func i() (r Reader, ok bool) {
+	// implicit interface conversion in multi-assignment during return
+	return h();
+}
+
+func fmter() (s string, i int, t string) {
+	return "%#x %q", 100, "hello"
+}
+
+func main() {
+	b := g();
+	bb, ok := b.(*Buffer);
+
+	b, ok = i();
+	bb, ok = b.(*Buffer);
+
+	s := fmt.Sprintf(fmter());
+	if s != "0x64 \"hello\"" {
+		panicln(s);
+	}
+}
+