add test for view of memmapped array after close

asdf/_tests/_regtests/test_1334.py

@@ -0,0 +1,21 @@
+import numpy as np
+
+import asdf
+
+
+def test_memmap_view_access_after_close(tmp_path):
+    """
+    Accessing a view of a memmap after the asdf file
+    is closed results in a segfault
+
+    https://github.com/asdf-format/asdf/issues/1334
+    """
+
+    a = np.ones(10, dtype="uint8")
+    fn = tmp_path / "test.asdf"
+    asdf.AsdfFile({"a": a}).write_to(fn)
+
+    with asdf.open(fn, copy_arrays=False) as af:
+        v = af["a"][:5]
+
+    assert np.all(v == 1)