In the case that merge-file is passed three files with identical
contents it wipes the contents of the output file instead of
leaving it unchanged.
Althought merge-file is porcelain and this will never happen in
normal usage, it is still wrong.
Signed-off-by: Charles Bailey <charles@hashpling.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
EOF
printf "propter nomen suum." >> new4.txt
+test_expect_failure 'merge with no changes' '
+ cp orig.txt test.txt &&
+ git merge-file test.txt orig.txt orig.txt &&
+ test_cmp test.txt orig.txt
+'
+
cp new1.txt test.txt
test_expect_success "merge without conflict" \
"git merge-file test.txt orig.txt new2.txt"