Check native object in case of early access

If a native displayio object is accessed before it's super().__init__()
has been called, then a placeholder is given that will cause a crash if
accessed. This is tricky to get right so we detect this case and raise
a NotInplementedError instead of crashing.

Fixes #1881

1 files changed, 2 insertions, 0 deletions

diff --git a/py/objtype.h b/py/objtype.h
index 13613f01f..a32c87496 100644
--- a/py/objtype.h
+++ b/py/objtype.h
@@ -37,6 +37,8 @@ typedef struct _mp_obj_instance_t {
     // TODO maybe cache __getattr__ and __setattr__ for efficient lookup of them
 } mp_obj_instance_t;
 
+void mp_obj_assert_native_inited(mp_obj_t native_object);
+
 #if MICROPY_CPYTHON_COMPAT
 // this is needed for object.__new__
 mp_obj_instance_t *mp_obj_new_instance(const mp_obj_type_t *cls, const mp_obj_type_t **native_base);