commit f290f48a621867084884bfff87f8093c15195e6a

Author: Andreas Gruenbacher <agruen@gnu.org>

Date:   Mon Feb 12 16:48:24 2018 +0100

    Fix segfault with mangled rename patch

    http://savannah.gnu.org/bugs/?53132

    * src/pch.c (intuit_diff_type): Ensure that two filenames are specified

    for renames and copies (fix the existing check).

diff --git a/src/pch.c b/src/pch.c

index ff9ed2c..bc6278c 100644

--- a/src/pch.c

+++ b/src/pch.c

@@ -974,7 +974,8 @@ intuit_diff_type (bool need_header, mode_t *p_file_type)

     if ((pch_rename () || pch_copy ())

 	&& ! inname

 	&& ! ((i == OLD || i == NEW) &&

-	      p_name[! reverse] &&

+	      p_name[reverse] && p_name[! reverse] &&

+	      name_is_valid (p_name[reverse]) &&

 	      name_is_valid (p_name[! reverse])))

       {

 	say ("Cannot %s file without two valid file names\n", pch_rename () ? "rename" : "copy");