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-rw-r--r--numpy/core/src/multiarray/ctors.c2
-rw-r--r--numpy/core/tests/test_maskna.py6
2 files changed, 7 insertions, 1 deletions
diff --git a/numpy/core/src/multiarray/ctors.c b/numpy/core/src/multiarray/ctors.c
index e121345b1..16e912c95 100644
--- a/numpy/core/src/multiarray/ctors.c
+++ b/numpy/core/src/multiarray/ctors.c
@@ -612,7 +612,7 @@ setArrayFromSequence(PyArrayObject *a, PyObject *s,
int dim, npy_intp offset, npy_intp maskoffset)
{
Py_ssize_t i, slen;
- int res = -1;
+ int res = 0;
int a_has_maskna = PyArray_HASMASKNA(a);
/*
diff --git a/numpy/core/tests/test_maskna.py b/numpy/core/tests/test_maskna.py
index 61fb7918e..393edf74d 100644
--- a/numpy/core/tests/test_maskna.py
+++ b/numpy/core/tests/test_maskna.py
@@ -45,6 +45,12 @@ def test_array_maskna_construction():
assert_equal(type(a), np.ndarray)
assert_(np.isna(a))
+ # The data type defaults to the same as an empty array if all is NA
+ a = np.array([np.NA], maskna=True)
+ b = np.array([])
+ assert_equal(a.dtype, b.dtype)
+ assert_(np.isna(a))
+
a = np.zeros((3,))
assert_(not a.flags.maskna)
a = np.zeros((3,), maskna=True)