test-lib: do not remove trash_directory if called with --debug

diff --git a/t/t6030-bisect-porcelain.sh b/t/t6030-bisect-porcelain.sh
index 0626544823d6ff9d37ea86c752285d093788df3e..244fda62a5cd34d778cf0789961654eaa37fe589 100755 (executable)
--- a/t/t6030-bisect-porcelain.sh
+++ b/t/t6030-bisect-porcelain.sh
@@ -76,7 +76,7 @@ test_expect_success 'bisect fails if given any junk instead of revs' '
        test_must_fail git bisect start foo $HASH1 -- &&
        test_must_fail git bisect start $HASH4 $HASH1 bar -- &&
        test -z "$(git for-each-ref "refs/bisect/*")" &&
-       test_must_fail ls .git/BISECT_* &&
+       test -z "$(ls .git/BISECT_* 2>/dev/null)" &&
        git bisect start &&
        test_must_fail git bisect good foo $HASH1 &&
        test_must_fail git bisect good $HASH1 bar &&