gc: initial BOM is legal.

Fixes issue 4040.

R=rsc
CC=golang-dev
http://codereview.appspot.com/6497098

1 files changed, 18 insertions, 0 deletions

diff --git a/test/bombad.go b/test/bombad.go
new file mode 100644
index 000000000..b894d9ba9
--- /dev/null
+++ b/test/bombad.go
@@ -0,0 +1,18 @@
+// errorcheck
+
+// Copyright 2012 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.
+
+// Here for reference, but hard to test automatically
+// because the BOM muddles the
+// processing done by ../run.
+
+package main
+
+func main() {
+	// There's a bom here.	// ERROR "BOM"
+	// And here.	// ERROR "BOM"
+	/* And here.*/	// ERROR "BOM"
+	println("hi there") // and here	// ERROR "BOM"
+}