Add test for issue numba#4520

numba/tests/test_dictobject.py

@@ -1229,6 +1229,22 @@ def foo(d):
         # Value is correctly updated
         self.assertPreciseEqual(d[1], np.arange(10, dtype=np.int64) + 100)
 
+    def test_storage_model_mismatch(self):
+        # https://github.com/numba/numba/issues/4520
+        # check for storage model mismatch in refcount ops generation
+        dct = Dict()
+        ref = [
+            ("a", True, "a"),
+            ("b", False, "b"),
+            ("c", False, "c"),
+        ]
+        # populate
+        for x in ref:
+            dct[x] = x
+        # test
+        for i, x in enumerate(ref):
+            self.assertEqual(dct[x], x)
+
 
 class TestDictForbiddenTypes(TestCase):
     def assert_disallow(self, expect, callable):

numba/tests/test_typedlist.py

@@ -742,3 +742,19 @@ def bag_equal(one, two):
             np.testing.assert_allclose(one.array, two.array)
 
         [bag_equal(a, b) for a, b in zip(expected, got)]
+
+    def test_storage_model_mismatch(self):
+        # https://github.com/numba/numba/issues/4520
+        # check for storage model mismatch in refcount ops generation
+        lst = List()
+        ref = [
+            ("a", True, "a"),
+            ("b", False, "b"),
+            ("c", False, "c"),
+        ]
+        # populate
+        for x in ref:
+            lst.append(x)
+        # test
+        for i, x in enumerate(ref):
+            self.assertEqual(lst[i], ref[i])