Crash report

Bug description:

This crashes from an assertion error, only when __lazy_import__ is called directly:

import sys

def li_filter(importing_module: str, imported_module: str, fromlist: tuple[str, ...]) -> bool:
    return False

sys.set_lazy_imports_filter(li_filter)

__lazy_import__('wave')

Moved from LazyImportsCabal#45 (couldn't have transferred it).

The compiler would always put a LOAD_CONST (None) before any IMPORT_NAME for imports without from, which is why this crash never happens in a regular lazy import.

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

Linked PRs

• gh-144851: Fix __lazy_import__ crash #144852