#!/bin/sh

test_description='checkout switching away from an invalid branch'

. ./test-lib.sh

test_expect_success 'setup' '
        echo hello >world &&
        git add world &&
        git commit -m initial
'

test_expect_success 'checkout should not start branch from a tree' '
        test_must_fail git checkout -b newbranch master^{tree}
'

test_expect_success 'checkout master from invalid HEAD' '
        echo 0000000000000000000000000000000000000000 >.git/HEAD &&
        git checkout master --
'

test_done