bug274: test case for issue 777

R=r, iant
CC=golang-dev
https://golang.org/cl/1195042

test/bugs/bug274.go

+// errchk $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.
+
+// 6g accepts the program below even though it is syntactically incorrect:
+// Each statement in the list of statements for each case clause must be
+// terminated with a semicolon. No semicolon is present for the labeled
+// statements and because the last token is a colon ":", no semicolon is
+// inserted automatically.
+//
+// Both gccgo and gofmt correctly refuse this program as is and accept it
+// when the semicolons are present.
+
+// This is a test case for issue 777 ( http://code.google.com/p/go/issues/detail?id=777 ).
+
+package main
+
+func main() {
+	switch 0 {
+	case 0:
+		L0:  // ERROR "statement"
+	case 1:
+		L1:  // ERROR "statement"
+	default:
+		L2:  // correct since no semicolon is required before a '}'
+	}
+}

test/golden.out

@@ -177,3 +177,6 @@ panic PC=xxx
 =========== bugs/bug260.go
 FAIL
 BUG: bug260 failed
+
+=========== bugs/bug274.go
+BUG: errchk: command succeeded unexpectedly