gc: double-check usage of ...
Fixes #423.
R=ken2
https://golang.org/cl/180045
diff --git a/test/fixedbugs/bug228.go b/test/fixedbugs/bug228.go
new file mode 100644
index 0000000..682152e
--- /dev/null
+++ b/test/fixedbugs/bug228.go
@@ -0,0 +1,19 @@
+// errchk $G -e $D/$F.go
+
+// 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
+
+func f(x int, y ...) // ok
+
+func g(x int, y float) (...) // ERROR "[.][.][.]"
+
+func h(x, y ...) // ERROR "[.][.][.]"
+
+func i(x int, y ..., z float) // ERROR "[.][.][.]"
+
+var x ...; // ERROR "[.][.][.]|syntax"
+
+type T ...; // ERROR "[.][.][.]|syntax"