TEST: Fix broken pypy ctypes test

2 files changed, 7 insertions, 24 deletions

diff --git a/numpy/core/_internal.py b/numpy/core/_internal.py
index 7b8ab9215..1cd6cd17f 100644
--- a/numpy/core/_internal.py
+++ b/numpy/core/_internal.py
@@ -247,30 +247,6 @@ class _missing_ctypes(object):
             self.value = ptr
 
 
-class _unsafe_first_element_pointer(object):
-    """
-    Helper to allow viewing an array as a ctypes pointer to the first element
-
-    This avoids:
-      * dealing with strides
-      * `.view` rejecting object-containing arrays
-      * `memoryview` not supporting overlapping fields
-    """
-    def __init__(self, arr):
-        self.base = arr
-
-    @property
-    def __array_interface__(self):
-        i = dict(
-            shape=(),
-            typestr='|V0',
-            data=(self.base.__array_interface__['data'][0], False),
-            strides=(),
-            version=3,
-        )
-        return i
-
-
 class _ctypes(object):
     def __init__(self, array, ptr=None):
         self._arr = array
diff --git a/numpy/core/tests/test_multiarray.py b/numpy/core/tests/test_multiarray.py
index b0623bd86..06a1a0a3d 100644
--- a/numpy/core/tests/test_multiarray.py
+++ b/numpy/core/tests/test_multiarray.py
@@ -7938,6 +7938,8 @@ class TestFormat(object):
                 dst = object.__format__(a, '30')
                 assert_equal(res, dst)
 
+from numpy.testing import IS_PYPY
+
 class TestCTypes(object):
 
     def test_ctypes_is_available(self):
@@ -8020,6 +8022,11 @@ class TestCTypes(object):
 
         # but when the `ctypes_ptr` object dies, so should `arr`
         del ctypes_ptr
+        if IS_PYPY:
+            # Pypy does not recycle arr objects immediately. Trigger gc to
+            # release arr. Cpython uses refcounts. An explicit call to gc
+            # should not be needed here.
+            break_cycles()
         assert_(arr_ref() is None, "unknowable whether ctypes pointer holds a reference")