From 1e39ea08122ef6db924f2ae622e03d4bedde8cd5 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <ian@gcc.gnu.org>
Date: Sat, 22 Sep 2012 06:51:59 +0000
Subject: compiler, runtime: Reject surrogate pair converting int to string.

From-SVN: r191636
---
 gcc/go/gofrontend/lex.cc | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'gcc/go/gofrontend/lex.cc')

diff --git a/gcc/go/gofrontend/lex.cc b/gcc/go/gofrontend/lex.cc
index 25aaeb7..6add84e 100644
--- a/gcc/go/gofrontend/lex.cc
+++ b/gcc/go/gofrontend/lex.cc
@@ -1312,6 +1312,12 @@ Lex::append_char(unsigned int v, bool is_character, std::string* str,
 	  // Turn it into the "replacement character".
 	  v = 0xfffd;
 	}
+      if (v >= 0xd800 && v < 0xe000)
+	{
+	  warning_at(location, 0,
+		     "unicode code point 0x%x is invalid surrogate pair", v);
+	  v = 0xfffd;
+	}
       if (v <= 0xffff)
 	{
 	  buf[0] = 0xe0 + (v >> 12);
-- 
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