cmd/gc: compute initialization order for top-level blank vars too.
Fixes #5244.
R=golang-dev, rsc, iant, r, daniel.morsing
CC=golang-dev
https://golang.org/cl/8601044
diff --git a/test/fixedbugs/issue5244.go b/test/fixedbugs/issue5244.go
new file mode 100644
index 0000000..e26c7b8
--- /dev/null
+++ b/test/fixedbugs/issue5244.go
@@ -0,0 +1,18 @@
+// run
+
+// Copyright 2013 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 5244: the init order computation uses the wrong
+// order for top-level blank identifier assignments.
+// The example used to panic because it tries calling a
+// nil function instead of assigning to f before.
+
+package main
+
+var f = func() int { return 1 }
+var _ = f() + g()
+var g = func() int { return 2 }
+
+func main() {}
