Fix mypyc failing to compile on CPython 3.10.0a6

_PyObject_HasAttrId() has been removed in
python/cpython#22629

mypyc/lib-rt/dict_ops.c

@@ -112,10 +112,16 @@ int CPyDict_Update(PyObject *dict, PyObject *stuff) {
 }
 
 int CPyDict_UpdateFromAny(PyObject *dict, PyObject *stuff) {
+    PyObject *tmp;
+
     if (PyDict_CheckExact(dict)) {
         // Argh this sucks
         _Py_IDENTIFIER(keys);
-        if (PyDict_Check(stuff) || _PyObject_HasAttrId(stuff, &PyId_keys)) {
+        int hasAttr = PyDict_Check(stuff) || _PyObject_LookupAttrId(stuff, &PyId_keys, &tmp);
+        if (tmp) {
+            Py_DECREF(tmp);
+        }
+        if (hasAttr) {
             return PyDict_Update(dict, stuff);
         } else {
             return PyDict_MergeFromSeq2(dict, stuff, 1);
@@ -126,6 +132,8 @@ int CPyDict_UpdateFromAny(PyObject *dict, PyObject *stuff) {
 }
 
 PyObject *CPyDict_FromAny(PyObject *obj) {
+    PyObject *tmp;
+
     if (PyDict_Check(obj)) {
         return PyDict_Copy(obj);
     } else {
@@ -135,11 +143,14 @@ PyObject *CPyDict_FromAny(PyObject *obj) {
             return NULL;
         }
         _Py_IDENTIFIER(keys);
-        if (_PyObject_HasAttrId(obj, &PyId_keys)) {
+        if (_PyObject_LookupAttrId(obj, &PyId_keys, &tmp)) {
             res = PyDict_Update(dict, obj);
         } else {
             res = PyDict_MergeFromSeq2(dict, obj, 1);
         }
+        if (tmp) {
+            Py_DECREF(tmp);
+        }
         if (res < 0) {
             Py_DECREF(dict);
             return NULL;

mypyc/test-data/run-misc.test

@@ -940,7 +940,10 @@ import sys
 
 # We lie about the version we are running in tests if it is 3.5, so
 # that hits a crash case.
-if sys.version_info[:2] == (3, 9):
+if sys.version_info[:2] == (3, 10):
+    def version() -> int:
+        return 10
+elif sys.version_info[:2] == (3, 9):
     def version() -> int:
         return 9
 elif sys.version_info[:2] == (3, 8):