Update registry.py

Author: BobTheBuidler

mypyc/primitives/registry.py

@@ -372,3 +372,4 @@ def load_address_op(name: str, type: RType, src: str) -> LoadAddressDescription:
 import mypyc.primitives.misc_ops
 import mypyc.primitives.str_ops
 import mypyc.primitives.tuple_ops  # noqa: F401
+import mypyc.primitives.weakref_ops