Bug report

Bug description:

import pickle
import sys
from dataclasses import dataclass, field


@dataclass
class State:
    x: list[int] = field(default_factory=list)

print(pickle.dumps(State([0])))

The following code will run successfully on it's own, but will fail if run with cProfile, with the message that __main__.State could not be found by.

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Linked PRs

• gh-132737: Support profiling modules that import __main___ #132738