From 09367c0d60f551d7d05b6212b649a71636b623ce Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <ian@gcc.gnu.org>
Date: Tue, 25 Oct 2011 16:35:24 +0000
Subject: Don't permit close of receive-only channel.

Better panic on attempt to close nil channel.

From-SVN: r180437
---
 libgo/runtime/go-close.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'libgo')

diff --git a/libgo/runtime/go-close.c b/libgo/runtime/go-close.c
index 44533eb..778eab3 100644
--- a/libgo/runtime/go-close.c
+++ b/libgo/runtime/go-close.c
@@ -16,6 +16,9 @@ __go_builtin_close (struct __go_channel *channel)
 {
   int i;
 
+  if (channel == NULL)
+    __go_panic_msg ("close of nil channel");
+
   i = pthread_mutex_lock (&channel->lock);
   __go_assert (i == 0);
 
-- 
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