From 3fa057a43770dbb23a0fb21a94cab1789df3277c Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <ian@gcc.gnu.org>
Date: Tue, 4 Dec 2012 06:44:19 +0000
Subject: [PATCH] compiler: Reject invalid nil == nil comparisons.
From-SVN: r194119
---
gcc/go/gofrontend/expressions.cc | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/gcc/go/gofrontend/expressions.cc b/gcc/go/gofrontend/expressions.cc
index bfc1b625d71b..e0690e77bf65 100644
--- a/gcc/go/gofrontend/expressions.cc
+++ b/gcc/go/gofrontend/expressions.cc
@@ -5610,6 +5610,11 @@ Binary_expression::do_check_types(Gogo*)
|| this->op_ == OPERATOR_GT
|| this->op_ == OPERATOR_GE)
{
+ if (left_type->is_nil_type() && right_type->is_nil_type())
+ {
+ this->report_error(_("invalid comparison of nil with nil"));
+ return;
+ }
if (!Type::are_assignable(left_type, right_type, NULL)
&& !Type::are_assignable(right_type, left_type, NULL))
{
--
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