gc: better diagnosis of initialization loops

Fixes bug 292.

R=ken2
http://codereview.appspot.com/164093

1 files changed, 21 insertions, 0 deletions

diff --git a/test/fixedbugs/bug223.go b/test/fixedbugs/bug223.go
new file mode 100644
index 000000000..80f9cae81
--- /dev/null
+++ b/test/fixedbugs/bug223.go
@@ -0,0 +1,21 @@
+// (! $G $D/$F.go) | grep 'initialization loop' >/dev/null || echo BUG: bug223
+
+// 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.
+
+// check that initialization loop is diagnosed
+// and that closure cannot be used to hide it.
+// error message is not standard format, so no errchk above.
+
+package main
+
+type F func()
+
+func f() {
+	if true {
+		_ = func() { _ = m }
+	}
+}
+
+var m = map[string]F{"f": f}