# HG changeset patch
# User Augie Fackler <augie@google.com>
# Date 1422371224 18000
# Node ID c8e7fa41bfc53dc23fad0e977eb56a110370fccb
# Parent  df463ca0adefbf6ffa084cfd8031dcfc6c944f8e
diffhelpers: verify hline was created before using it

Found with cpychecker.

diff -r df463ca0adef -r c8e7fa41bfc5 mercurial/diffhelpers.c
--- a/mercurial/diffhelpers.c	Sun Jan 25 22:55:10 2015 -0500
+++ b/mercurial/diffhelpers.c	Tue Jan 27 10:07:04 2015 -0500
@@ -34,6 +34,9 @@
 		sz -= 1;
 
 	hline = PyBytes_FromStringAndSize(l, sz-1);
+	if (!hline) {
+		return NULL;
+	}
 
 	if (c == ' ' || c == '+') {
 		PyObject *rline = PyBytes_FromStringAndSize(l + 1, sz - 2);
@@ -194,4 +197,3 @@
 	                                        NULL, NULL);
 }
 #endif
-