python
diff --git a/‎Modules/_ctypes/_ctypes.c
Lines changed: 9 additions & 1 deletion b/‎Modules/_ctypes/_ctypes.c
Lines changed: 9 additions & 1 deletion
diff --git a/‎Modules/_ctypes/stgdict.c
Lines changed: 12 additions & 12 deletions b/‎Modules/_ctypes/stgdict.c
Lines changed: 12 additions & 12 deletions
@@ -410,9 +410,11 @@ typedef struct {
 #define _StructParamObject_CAST(op) ((StructParamObject *)(op))
 
 static int
-StructParam_traverse(PyObject *self, visitproc visit, void *arg)
+StructParam_traverse(PyObject *myself, visitproc visit, void *arg)
 {
+    StructParamObject *self = _StructParamObject_CAST(myself);
     Py_VISIT(Py_TYPE(self));
+    Py_VISIT(self->keep);
     return 0;
 }
 
@@ -2378,6 +2380,7 @@ PyCSimpleType_init(PyObject *self, PyObject *args, PyObject *kwds)
         }
         StgInfo *sw_info;
         if (PyStgInfo_FromType(st, swapped, &sw_info) < 0) {
+            Py_DECREF(swapped);
             return -1;
         }
         assert(sw_info);
@@ -2674,6 +2677,7 @@ make_funcptrtype_dict(ctypes_state *st, PyObject *attrdict, StgInfo *stginfo)
     if (ob) {
         StgInfo *info;
         if (PyStgInfo_FromType(st, ob, &info) < 0) {
+            Py_DECREF(ob);
             return -1;
         }
         if (ob != Py_None && !info && !PyCallable_Check(ob)) {
@@ -5650,6 +5654,10 @@ Pointer_subscript(PyObject *myself, PyObject *item)
 
         for (cur = start, i = 0; i < len; cur += step, i++) {
             PyObject *v = Pointer_item(myself, cur);
+            if (!v) {
+                Py_DECREF(np);
+                return NULL;
+            }
             PyList_SET_ITEM(np, i, v);
         }
         return np;
 
@@ -225,8 +225,8 @@ PyCStructUnionType_update_stginfo(PyObject *type, PyObject *fields, int isStruct
     // They're cleared on error.
     PyObject *layout_func = NULL;
     PyObject *kwnames = NULL;
-    PyObject* align = NULL;
-    PyObject* size = NULL;
+    PyObject *align_obj = NULL;
+    PyObject *size_obj = NULL;
     PyObject *layout_fields_obj = NULL;
     PyObject *layout_fields = NULL;
     PyObject *layout = NULL;
@@ -291,12 +291,12 @@ PyCStructUnionType_update_stginfo(PyObject *type, PyObject *fields, int isStruct
         goto error;
     }
 
-    align = PyObject_GetAttr(layout, &_Py_ID(align));
-    if (!align) {
+    align_obj = PyObject_GetAttr(layout, &_Py_ID(align));
+    if (!align_obj) {
         goto error;
     }
-    Py_ssize_t total_align = PyLong_AsSsize_t(align);
-    Py_CLEAR(align);
+    Py_ssize_t total_align = PyLong_AsSsize_t(align_obj);
+    Py_CLEAR(align_obj);
     if (total_align < 0) {
         if (!PyErr_Occurred()) {
             PyErr_SetString(PyExc_ValueError,
@@ -305,12 +305,12 @@ PyCStructUnionType_update_stginfo(PyObject *type, PyObject *fields, int isStruct
         goto error;
     }
 
-    size = PyObject_GetAttr(layout, &_Py_ID(size));
-    if (!size) {
+    size_obj = PyObject_GetAttr(layout, &_Py_ID(size));
+    if (!size_obj) {
         goto error;
     }
-    Py_ssize_t total_size = PyLong_AsSsize_t(size);
-    Py_CLEAR(size);
+    Py_ssize_t total_size = PyLong_AsSsize_t(size_obj);
+    Py_CLEAR(size_obj);
     if (total_size < 0) {
         if (!PyErr_Occurred()) {
             PyErr_SetString(PyExc_ValueError,
@@ -669,8 +669,8 @@ PyCStructUnionType_update_stginfo(PyObject *type, PyObject *fields, int isStruct
 error:
     Py_XDECREF(layout_func);
     Py_XDECREF(kwnames);
-    Py_XDECREF(align);
-    Py_XDECREF(size);
+    Py_XDECREF(align_obj);
+    Py_XDECREF(size_obj);
     Py_XDECREF(layout_fields_obj);
     Py_XDECREF(layout_fields);
     Py_XDECREF(layout);
Original file line number	Diff line number	Diff line change
`@@ -410,9 +410,11 @@ typedef struct {`
`410`	`410`	`#define _StructParamObject_CAST(op) ((StructParamObject *)(op))`
`411`	`411`
`412`	`412`	`static int`
`413`		`-StructParam_traverse(PyObject self, visitproc visit, void arg)`
	`413`	`+StructParam_traverse(PyObject myself, visitproc visit, void arg)`
`414`	`414`	`{`
	`415`	`+ StructParamObject *self = _StructParamObject_CAST(myself);`
`415`	`416`	`Py_VISIT(Py_TYPE(self));`
	`417`	`+ Py_VISIT(self->keep);`
`416`	`418`	`return 0;`
`417`	`419`	`}`
`418`	`420`
`@@ -2378,6 +2380,7 @@ PyCSimpleType_init(PyObject self, PyObject args, PyObject *kwds)`
`2378`	`2380`	`}`
`2379`	`2381`	`StgInfo *sw_info;`
`2380`	`2382`	`if (PyStgInfo_FromType(st, swapped, &sw_info) < 0) {`
	`2383`	`+ Py_DECREF(swapped);`
`2381`	`2384`	`return -1;`
`2382`	`2385`	`}`
`2383`	`2386`	`assert(sw_info);`
`@@ -2674,6 +2677,7 @@ make_funcptrtype_dict(ctypes_state st, PyObject attrdict, StgInfo *stginfo)`
`2674`	`2677`	`if (ob) {`
`2675`	`2678`	`StgInfo *info;`
`2676`	`2679`	`if (PyStgInfo_FromType(st, ob, &info) < 0) {`
	`2680`	`+ Py_DECREF(ob);`
`2677`	`2681`	`return -1;`
`2678`	`2682`	`}`
`2679`	`2683`	`if (ob != Py_None && !info && !PyCallable_Check(ob)) {`
`@@ -5650,6 +5654,10 @@ Pointer_subscript(PyObject myself, PyObject item)`
`5650`	`5654`
`5651`	`5655`	`for (cur = start, i = 0; i < len; cur += step, i++) {`
`5652`	`5656`	`PyObject *v = Pointer_item(myself, cur);`
	`5657`	`+ if (!v) {`
	`5658`	`+ Py_DECREF(np);`
	`5659`	`+ return NULL;`
	`5660`	`+ }`
`5653`	`5661`	`PyList_SET_ITEM(np, i, v);`
`5654`	`5662`	`}`
`5655`	`5663`	`return np;`