difftool --no-index: error out on --dir-diff (and don't crash)

diff --git a/t/t4033-diff-patience.sh b/t/t4033-diff-patience.sh
index 3c9932edf3f3dd44eaef98c0509a6cbe4b0091f5..113304dc596034ff9bfaac65b2ff896b6a181dca 100755 (executable)
--- a/t/t4033-diff-patience.sh
+++ b/t/t4033-diff-patience.sh
@@ -5,6 +5,14 @@ test_description='patience diff algorithm'
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-diff-alternative.sh
 
+test_expect_success '--ignore-space-at-eol with a single appended character' '
+       printf "a\nb\nc\n" >pre &&
+       printf "a\nbX\nc\n" >post &&
+       test_must_fail git diff --no-index \
+               --patience --ignore-space-at-eol pre post >diff &&
+       grep "^+.*X" diff
+'
+
 test_diff_frobnitz "patience"
 
 test_diff_unique "patience"