From 7838059fb2e20689a98ece0f077ed288146515b6 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <ian@gcc.gnu.org>
Date: Wed, 22 Dec 2010 23:57:28 +0000
Subject: Don't crash on invalid call to append.

From-SVN: r168187
---
 gcc/go/gofrontend/expressions.cc | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'gcc')

diff --git a/gcc/go/gofrontend/expressions.cc b/gcc/go/gofrontend/expressions.cc
index 491b71a..ea5821b 100644
--- a/gcc/go/gofrontend/expressions.cc
+++ b/gcc/go/gofrontend/expressions.cc
@@ -7387,8 +7387,11 @@ Builtin_call_expression::do_check_types(Gogo*)
 	    this->report_error(_("not enough arguments"));
 	    break;
 	  }
-	/* Lowering varargs should have left us with 2 arguments.  */
-	gcc_assert(args->size() == 2);
+	if (args->size() > 2)
+	  {
+	    this->report_error(_("too many arguments"));
+	    break;
+	  }
 	std::string reason;
 	if (!Type::are_assignable(args->front()->type(), args->back()->type(),
 				  &reason))
-- 
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