In git-checkout.txt, it states As a special case, you may use `"A...B"` as a shortcut for the merge base of `A` and `B` if there is exactly one merge base. You can leave out at most one of `A` and `B`, in which case it defaults to `HEAD`. However, there exists a bug where performing $ git checkout -b test master... fails with the message fatal: Not a valid object name: 'master...'. Demonstrate this failure so that it can be corrected later. Signed-off-by: Denton Liu <liu.denton@xxxxxxxxx> --- t/t2018-checkout-branch.sh | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/t/t2018-checkout-branch.sh b/t/t2018-checkout-branch.sh index f1c7023e1a..3cd142657a 100755 --- a/t/t2018-checkout-branch.sh +++ b/t/t2018-checkout-branch.sh @@ -66,6 +66,13 @@ test_expect_success 'checkout -b to a new branch, set to HEAD' ' do_checkout branch2 ' +test_expect_failure 'checkout -b to a merge base' ' + test_when_finished " + git checkout branch1 && + test_might_fail git branch -D branch2" && + git checkout -b branch2 branch1... +' + test_expect_success 'checkout -b to a new branch, set to an explicit ref' ' test_when_finished " git checkout branch1 && @@ -126,6 +133,12 @@ test_expect_success 'checkout -B to an existing branch resets branch to HEAD' ' do_checkout branch2 "" -B ' +test_expect_failure 'checkout -B to a merge base' ' + git checkout branch1 && + + git checkout -B branch2 branch1... +' + test_expect_success 'checkout -B to an existing branch from detached HEAD resets branch to HEAD' ' git checkout $(git rev-parse --verify HEAD) && -- 2.21.0.1033.g0e8cc1100c
