# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1541449806 -3600
# Node ID 9c2352253376e2cb722df4dccd1faf98ad8dc9db
# Parent  bd0d66403ac4d69ce6cdf1a3933f54a298d2b7db
patch 8.1.0513: no error for set diffopt+=algorithm:

commit https://github.com/vim/vim/commit/d0721058f494143186f66a60151c9634031a8c96
Author: Bram Moolenaar <Bram@vim.org>
Date:   Mon Nov 5 21:21:33 2018 +0100

    patch 8.1.0513: no error for set diffopt+=algorithm:

    Problem:    No error for set diffopt+=algorithm:.
    Solution:   Check for missing argument. (Hirohito Higashi, closes https://github.com/vim/vim/issues/3598)

diff --git a/src/diff.c b/src/diff.c
--- a/src/diff.c
+++ b/src/diff.c
@@ -2266,6 +2266,8 @@ diffopt_changed(void)
 		p += 9;
 		diff_algorithm_new = XDF_HISTOGRAM_DIFF;
 	    }
+	    else
+		return FAIL;
 	}
 
 	if (*p != ',' && *p != NUL)
diff --git a/src/testdir/gen_opt_test.vim b/src/testdir/gen_opt_test.vim
--- a/src/testdir/gen_opt_test.vim
+++ b/src/testdir/gen_opt_test.vim
@@ -81,7 +81,7 @@ let test_values = {
       \ 'cryptmethod': [['', 'zip'], ['xxx']],
       \ 'cscopequickfix': [['', 's-', 's-,c+,e0'], ['xxx', 's,g,d']],
       \ 'debug': [['', 'msg', 'msg', 'beep'], ['xxx']],
-      \ 'diffopt': [['', 'filler', 'icase,iwhite'], ['xxx']],
+      \ 'diffopt': [['', 'filler', 'icase,iwhite'], ['xxx', 'algorithm:xxx', 'algorithm:']],
       \ 'display': [['', 'lastline', 'lastline,uhex'], ['xxx']],
       \ 'eadirection': [['', 'both', 'ver'], ['xxx', 'ver,hor']],
       \ 'encoding': [['latin1'], ['xxx', '']],
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -793,6 +793,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    513,
+/**/
     512,
 /**/
     511,