bug218.go: testcase for issue 238

R=rsc
https://golang.org/cl/154172

test/bugs/bug218.go

@@ -0,0 +1,23 @@
+// $G $D/$F.go || echo BUG: bug218
+
+// 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.
+
+// Crashes 6g, 8g
+// http://code.google.com/p/go/issues/detail?id=238
+
+package main
+
+func main() {
+	bar := make(chan bool);
+	select {
+	case _ = <-bar:
+		return
+	}
+}
+
+/*
+6g bug218.go 
+<epoch>: fatal error: dowidth: unknown type: blank
+*/

test/golden.out

@@ -141,3 +141,7 @@ throw: interface conversion
 panic PC=xxx
 
 == bugs/
+
+=========== bugs/bug218.go
+<epoch>: fatal error: dowidth: unknown type: blank
+BUG: bug218