blame: default to HEAD in a bare repo when no start commit is given

diff --git a/t/t4200-rerere.sh b/t/t4200-rerere.sh
index 65da74c76683c0ccd109fdec63766ab6bdfb08f0..55b7750ade1c5fd225f830bbbfcb42938abcbe37 100755 (executable)
--- a/t/t4200-rerere.sh
+++ b/t/t4200-rerere.sh
@@ -577,4 +577,98 @@ test_expect_success 'multiple identical conflicts' '
        count_pre_post 0 0
 '
 
+test_expect_success 'rerere with unexpected conflict markers does not crash' '
+       git reset --hard &&
+
+       git checkout -b branch-1 master &&
+       echo "bar" >test &&
+       git add test &&
+       git commit -q -m two &&
+
+       git reset --hard &&
+       git checkout -b branch-2 master &&
+       echo "foo" >test &&
+       git add test &&
+       git commit -q -a -m one &&
+
+       test_must_fail git merge branch-1 &&
+       echo "<<<<<<< a" >test &&
+       git rerere &&
+
+       git rerere clear
+'
+
+test_expect_success 'rerere with inner conflict markers' '
+       git reset --hard &&
+
+       git checkout -b A master &&
+       echo "bar" >test &&
+       git add test &&
+       git commit -q -m two &&
+       echo "baz" >test &&
+       git add test &&
+       git commit -q -m three &&
+
+       git reset --hard &&
+       git checkout -b B master &&
+       echo "foo" >test &&
+       git add test &&
+       git commit -q -a -m one &&
+
+       test_must_fail git merge A~ &&
+       git add test &&
+       git commit -q -m "will solve conflicts later" &&
+       test_must_fail git merge A &&
+
+       echo "resolved" >test &&
+       git add test &&
+       git commit -q -m "solved conflict" &&
+
+       echo "resolved" >expect &&
+
+       git reset --hard HEAD~~ &&
+       test_must_fail git merge A~ &&
+       git add test &&
+       git commit -q -m "will solve conflicts later" &&
+       test_must_fail git merge A &&
+       cat test >actual &&
+       test_cmp expect actual &&
+
+       git add test &&
+       git commit -m "rerere solved conflict" &&
+       git reset --hard HEAD~ &&
+       test_must_fail git merge A &&
+       cat test >actual &&
+       test_cmp expect actual
+'
+
+test_expect_success 'setup simple stage 1 handling' '
+       test_create_repo stage_1_handling &&
+       (
+               cd stage_1_handling &&
+
+               test_seq 1 10 >original &&
+               git add original &&
+               git commit -m original &&
+
+               git checkout -b A master &&
+               git mv original A &&
+               git commit -m "rename to A" &&
+
+               git checkout -b B master &&
+               git mv original B &&
+               git commit -m "rename to B"
+       )
+'
+
+test_expect_success 'test simple stage 1 handling' '
+       (
+               cd stage_1_handling &&
+
+               git config rerere.enabled true &&
+               git checkout A^0 &&
+               test_must_fail git merge B^0
+       )
+'
+
 test_done