test: add some tests that gccgo failed to handle correctly
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5671090
diff --git a/test/fixedbugs/bug421.go b/test/fixedbugs/bug421.go
new file mode 100644
index 0000000..1fe0237
--- /dev/null
+++ b/test/fixedbugs/bug421.go
@@ -0,0 +1,17 @@
+// 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.
+
+// Issue 1927.
+// gccgo failed to issue the first error below.
+
+package main
+
+func main() {
+ println(int(1) == uint(1)) // ERROR "types"
+ var x int = 1
+ var y uint = 1
+ println(x == y) // ERROR "types"
+}
