…yWriterThe binary_writer_create function had several error paths where memoryallocation failures would return NULL without setting a Python exception.This violated the C API contract and caused "returning an error withoutexception set" errors when BinaryWriter initialization failed due tomemory pressure.Added PyErr_NoMemory calls before each goto error for PyMem_Malloc and_Py_hashtable_new_full failures. Neither of these functions set exceptionson failure, so callers must do it explicitly. The error label only performscleanup and returns NULL, relying on exceptions being set beforehand.