From bf6526a05328b2809a044418b14d69ffb835ef21 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <ian@gcc.gnu.org>
Date: Thu, 24 Feb 2011 13:58:51 +0000
Subject: Don't crash when using receive on erroneous channel.

From-SVN: r170468
---
 gcc/go/gofrontend/expressions.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/gcc/go/gofrontend/expressions.cc b/gcc/go/gofrontend/expressions.cc
index 2e31e80..259faa1 100644
--- a/gcc/go/gofrontend/expressions.cc
+++ b/gcc/go/gofrontend/expressions.cc
@@ -12264,7 +12264,11 @@ tree
 Receive_expression::do_get_tree(Translate_context* context)
 {
   Channel_type* channel_type = this->channel_->type()->channel_type();
-  gcc_assert(channel_type != NULL);
+  if (channel_type == NULL)
+    {
+      gcc_assert(this->channel_->type()->is_error_type());
+      return error_mark_node;
+    }
   Type* element_type = channel_type->element_type();
   tree element_type_tree = element_type->get_tree(context->gogo());
 
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