Objects/descrobject.c:1913:5: warning: cast from 'void (*)(mappingproxyobject *)' to 'destructor' (aka 'void (*)(struct _object *)') converts to incompatible function type [-Wcast-function-type-strict]
 1913 |     (destructor)mappingproxy_dealloc,           /* tp_dealloc */
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Example UBSan error:

Python/generated_cases.c.h:3315:13: runtime error: call to function mappingproxy_dealloc through pointer to incorrect function type 'void (*)(struct _object *)'
descrobject.c:1160: note: mappingproxy_dealloc defined here
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior Python/generated_cases.c.h:3315:13 in

Objects/descrobject.c:808:5: warning: cast from 'PyObject *(*)(PyMemberDescrObject *, PyObject *, PyObject *)' (aka 'struct _object *(*)(PyMemberDescrObject *, struct _object *, struct _object *)') to 'descrgetfunc' (aka 'struct _object *(*)(struct _object *, struct _object *, struct _object *)') converts to incompatible function type [-Wcast-function-type-strict]
  808 |     (descrgetfunc)member_get,                   /* tp_descr_get */
      |     ^~~~~~~~~~~~~~~~~~~~~~~~
Objects/descrobject.c:809:5: warning: cast from 'int (*)(PyMemberDescrObject *, PyObject *, PyObject *)' (aka 'int (*)(PyMemberDescrObject *, struct _object *, struct _object *)') to 'descrsetfunc' (aka 'int (*)(struct _object *, struct _object *, struct _object *)') converts to incompatible function type [-Wcast-function-type-strict]
  809 |     (descrsetfunc)member_set,                   /* tp_descr_set */
      |     ^~~~~~~~~~~~~~~~~~~~~~~~

Example UBSan error:

Objects/object.c:1682:19: runtime error: call to function member_set through pointer to incorrect function type 'int (*)(struct _object *, struct _object *, struct _object *)'
descrobject.c:227: note: member_set defined here
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior Objects/object.c:1682:19 in
Objects/object.c:1564:19: runtime error: call to function member_get through pointer to incorrect function type 'struct _object *(*)(struct _object *, struct _object *, struct _object *)'
descrobject.c:160: note: member_get defined here
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior Objects/object.c:1564:19 in

Example compiler warning:

Objects/descrobject.c:703:5: warning: cast from 'void (*)(PyDescrObject *)' to 'destructor' (aka 'void (*)(struct _object *)') converts to incompatible function type [-Wcast-function-type-strict]
  703 |     (destructor)descr_dealloc,                  /* tp_dealloc */
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~

Example UBSan error:

Objects/object.c:2857:5: runtime error: call to function descr_dealloc through pointer to incorrect function type 'void (*)(struct _object *)'
descrobject.c:23: note: descr_dealloc defined here
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior Objects/object.c:2857:5 in

Objects/descrobject.c:771:5: warning: cast from 'PyObject *(*)(PyMethodDescrObject *, PyObject *, PyObject *)' (aka 'struct _object *(*)(PyMethodDescrObject *, struct _object *, struct _object *)') to 'descrgetfunc' (aka 'struct _object *(*)(struct _object *, struct _object *, struct _object *)') converts to incompatible function type [-Wcast-function-type-strict]
  771 |     (descrgetfunc)classmethod_get,              /* tp_descr_get */
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Example UBSan error:

Objects/typeobject.c:10293:24: runtime error: call to function classmethod_get through pointer to incorrect function type 'struct _object *(*)(struct _object *, struct _object *, struct _object *)'
descrobject.c:94: note: classmethod_get defined here
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior Objects/typeobject.c:10293:24 in

Objects/descrobject.c:845:5: warning: cast from 'PyObject *(*)(PyGetSetDescrObject *, PyObject *, PyObject *)' (aka 'struct _object *(*)(PyGetSetDescrObject *, struct _object *, struct _object *)') to 'descrgetfunc' (aka 'struct _object *(*)(struct _object *, struct _object *, struct _object *)') converts to incompatible function type [-Wcast-function-type-strict]
  845 |     (descrgetfunc)getset_get,                   /* tp_descr_get */
      |     ^~~~~~~~~~~~~~~~~~~~~~~~
Objects/descrobject.c:846:5: warning: cast from 'int (*)(PyGetSetDescrObject *, PyObject *, PyObject *)' (aka 'int (*)(PyGetSetDescrObject *, struct _object *, struct _object *)') to 'descrsetfunc' (aka 'int (*)(struct _object *, struct _object *, struct _object *)') converts to incompatible function type [-Wcast-function-type-strict]
  846 |     (descrsetfunc)getset_set,                   /* tp_descr_set */
      |     ^~~~~~~~~~~~~~~~~~~~~~~~

Example UBSan error:

Objects/typeobject.c:4861:19: runtime error: call to function getset_get through pointer to incorrect function type 'struct _object *(*)(struct _object *, struct _object *, struct _object *)'
descrobject.c:180: note: getset_get defined here
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior Objects/typeobject.c:4861:19 in

Objects/descrobject.c:739:5: warning: cast from 'PyObject *(*)(PyMethodDescrObject *, PyObject *, PyObject *)' (aka 'struct _object *(*)(PyMethodDescrObject *, struct _object *, struct _object *)') to 'descrgetfunc' (aka 'struct _object *(*)(struct _object *, struct _object *, struct _object *)') converts to incompatible function type [-Wcast-function-type-strict]
  739 |     (descrgetfunc)method_get,                   /* tp_descr_get */
      |     ^~~~~~~~~~~~~~~~~~~~~~~~

Example UBSan error:

Objects/object.c:1621:15: runtime error: call to function method_get through pointer to incorrect function type 'struct _object *(*)(struct _object *, struct _object *, struct _object *)'
descrobject.c:138: note: method_get defined here
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior Objects/object.c:1621:15 in