gc: diagnose invalid array bounds
Fixes #587.
R=ken2
CC=golang-dev
https://golang.org/cl/207085
diff --git a/test/fixedbugs/bug255.go b/test/fixedbugs/bug255.go
new file mode 100644
index 0000000..4003a78
--- /dev/null
+++ b/test/fixedbugs/bug255.go
@@ -0,0 +1,15 @@
+// errchk $G -e $D/$F.go
+
+// Copyright 2010 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
+
+var a [10]int // ok
+var b [1e1]int // ok
+var c [1.5]int // ERROR "truncated"
+var d ["abc"]int // ERROR "invalid array bound"
+var e [nil]int // ERROR "invalid array bound"
+var f [e]int // ERROR "invalid array bound"
+var g [1<<65]int // ERROR "overflows"
