[3.6] bpo-41288: Fix a crash in unpickling invalid NEWOBJ_EX. (GH-21458)#21462

ned-deily merged 1 commit intopython:3.6python/cpython:3.6from

miss-islington:backport-4f309ab-3.6miss-islington/cpython:backport-4f309ab-3.6Copy head branch name to clipboard