debug/dwarf: handle surprising clang encoding

Fixes a bug in cgo on OS X using clang.
See golang.org/issue/6472 for details.

Fixes issue 6472.

R=golang-dev, iant
CC=golang-dev
https://codereview.appspot.com/14575043

1 files changed, 22 insertions, 0 deletions

diff --git a/misc/cgo/test/issue6472.go b/misc/cgo/test/issue6472.go
new file mode 100644
index 000000000..cd94cac37
--- /dev/null
+++ b/misc/cgo/test/issue6472.go
@@ -0,0 +1,22 @@
+// 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.
+
+package cgotest
+
+/*
+typedef struct
+{
+        struct
+        {
+            int x;
+        } y[16];
+} z;
+*/
+import "C"
+
+func test6472() {
+	// nothing to run, just make sure this compiles
+	s := new(C.z)
+	println(s.y[0].x)
+}