Merge branch 'ps/bisect-double-free-fix'

Work around Coverity warning that would not trigger in practice.

* ps/bisect-double-free-fix:
  bisect: address Coverity warning about potential double free

bisect.c

@@ -442,8 +442,6 @@ void find_bisection(struct commit_list **commit_list, int *reaches,
 			best->next = NULL;
 		}
 		*reaches = weight(best);
-	} else {
-		free_commit_list(*commit_list);
 	}
 	*commit_list = best;
 

t/t6002-rev-list-bisect.sh

@@ -308,4 +308,9 @@ test_expect_success '--bisect-all --first-parent' '
 	test_cmp expect actual
 '
 
+test_expect_success '--bisect without any revisions' '
+	git rev-list --bisect HEAD..HEAD >out &&
+	test_must_be_empty out
+'
+
 test_done