From a6fed64abcc079877b33804420c666b867b50987 Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Sun, 03 Aug 2008 20:00:25 +0000
Subject: Handle lone high surrogates gracefully.

2008-08-03  Bruno Haible  <bruno@clisp.org>

	* x-python.c (mixed_string_buffer_append): Replace a lone high
	surrogate with U+FFFD.
	Reported by Yann <asterix@lagaule.org>
	via Santiago Vila <sanvila@unex.es>.

diff --git a/gettext-tools/src/x-python.c b/gettext-tools/src/x-python.c
index e6dcc31..e05aca4 100644
--- a/gettext-tools/src/x-python.c
+++ b/gettext-tools/src/x-python.c
@@ -930,6 +930,11 @@ mixed_string_buffer_append (struct mixed_string_buffer *bp, int c)
 
 	  if (c >= UNICODE (0xd800) && c < UNICODE (0xdc00))
 	    bp->utf16_surr = UNICODE_VALUE (c);
+	  else if (c >= UNICODE (0xdc00) && c < UNICODE (0xe000))
+	    {
+	      /* A half surrogate is invalid, therefore use U+FFFD instead.  */
+	      mixed_string_buffer_append_unicode (bp, 0xfffd);
+	    }
 	  else
 	    mixed_string_buffer_append_unicode (bp, UNICODE_VALUE (c));
 	}