[GR-24268] Add missing conversion to Py_Ssize_t in _PyDict_Next.

PullRequest: graalpython/1048

Author: fangerer

graalpython/com.oracle.graal.python.cext/src/dictobject.c

@@ -101,7 +101,7 @@ int _PyDict_Next(PyObject *d, Py_ssize_t *ppos, PyObject **pkey, PyObject **pval
     	*pvalue = PyTuple_GetItem(tresult, 1);
     }
     if (phash != NULL) {
-    	*phash = PyTuple_GetItem(tresult, 2);
+    	*phash = PyLong_AsSsize_t(PyTuple_GetItem(tresult, 2));
     }
     return 1;
 

graalpython/com.oracle.graal.python.test/src/tests/cpyext/test_dict.py

@@ -1,4 +1,4 @@
-# Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2018, 2020, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # The Universal Permissive License (UPL), Version 1.0
@@ -255,6 +255,31 @@ def compile_module(self, name):
         cmpfunc=lambda x, y: type(x) == tuple and type(y) == tuple and len(x) == 3 and len(y) == 3 and (x[0] == 0 and y[0] == 0 or x == y)
     )
 
+    # _PyDict_SetItem_KnownHash
+    test__PyDict_SetItem_KnownHash = CPyExtFunction(
+        lambda args: {'a': "hello"},
+        lambda: (({'a': "hello"}, ),),
+        code='''PyObject* wrap__PyDict_SetItem_KnownHash(PyObject* dict) {
+            PyObject* result = PyDict_New();
+            
+            Py_ssize_t ppos = 0;
+            PyObject* key;
+            PyObject* value;
+            Py_hash_t phash;
+            
+            int res = 0;
+            
+           _PyDict_Next(dict, &ppos, &key, &value, &phash);
+            res = _PyDict_SetItem_KnownHash(result, key, value, phash);
+            return result;
+        }
+        ''',
+        resultspec="O",
+        argspec='O',
+        arguments=["PyObject* dict"],
+        callfunction="wrap__PyDict_SetItem_KnownHash",
+    )
+
     # PyDict_Size
     test_PyDict_Size = CPyExtFunction(
         lambda args: len(args[0]),