gc: initial BOM is legal.
Fixes #4040.
R=rsc
CC=golang-dev
https://golang.org/cl/6497098
diff --git a/test/bom.go b/test/bom.go
new file mode 100644
index 0000000..37f73bc
--- /dev/null
+++ b/test/bom.go
@@ -0,0 +1,26 @@
+// runoutput
+
+// Copyright 2011 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.
+
+// Test source file beginning with a byte order mark.
+
+package main
+
+import (
+ "fmt"
+ "strings"
+)
+
+func main() {
+ prog = strings.Replace(prog, "BOM", "\uFEFF", -1)
+ fmt.Print(prog)
+}
+
+var prog = `BOM
+package main
+
+func main() {
+}
+`
diff --git a/test/bombad.go b/test/bombad.go
new file mode 100644
index 0000000..b894d9b
--- /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"
+}
