vector: do not malloc 0-length vectors on dup

1 files changed, 19 insertions, 0 deletions

diff --git a/tests/core/vector.c b/tests/core/vector.c
index 4e6f6fc7f..6b8ea574d 100644
--- a/tests/core/vector.c
+++ b/tests/core/vector.c
@@ -407,3 +407,22 @@ void test_core_vector__reverse(void)
 
 	git_vector_free(&v);
 }
+
+void test_core_vector__dup_empty_vector(void)
+{
+	git_vector v = GIT_VECTOR_INIT;
+	git_vector dup = GIT_VECTOR_INIT;
+	void *dummy = 0xDEAFBEEB;
+
+	cl_assert_equal_i(0, v.length);
+
+	cl_git_pass(git_vector_dup(&dup, &v, v._cmp));
+	cl_assert_equal_i(0, dup._alloc_size);
+	cl_assert_equal_i(0, dup.length);
+
+	cl_git_pass(git_vector_insert(&dup, dummy));
+	cl_assert_equal_i(8, dup._alloc_size);
+	cl_assert_equal_i(1, dup.length);
+
+	git_vector_free(&dup);
+}