Describe the Bug

Here's the example code:

import shutil
from contextlib import ExitStack


def foo(tmpdir):
    with ExitStack() as resources:
        resources.callback(shutil.rmtree, tmpdir, ignore_errors=True)


def bar(tmpdir):
    shutil.rmtree(tmpdir, ignore_errors=True)

and the output of pyrefly check example.py:

ERROR Missing argument `onerror` in function `contextlib._BaseExitStack.callback` [missing-argument]
 --> example.py:7:27
  |
7 |         resources.callback(shutil.rmtree, tmpdir, ignore_errors=True)
  |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
 INFO 1 error

What's odd to me is that pyrefly complains about onerror (which clearly is a default argument), but only when called through ExitStack.callback. When called explicitly, pyrefly (correctly, IMHO) accepts the call with the missing onerror argument.

% pyrefly --version
pyrefly 0.48.0

Sandbox Link

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(Only applicable for extension issues) IDE Information

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