extract_lambda_source fails in Pyodide

[Zac-HD]

If you paste the following code into my online ghostwriter demo, you get an error:

from hypothesis import given, strategies as st

@given(st.just(lambda: None))
def test_extract_lambda_source(obj):
    assert False

Traceback (most recent call last):
  File "test_code.py", line 6, in test_extract_lambda_source
    #
  File "/lib/python3.10/site-packages/hypothesis/core.py", line 1257, in wrapped_test
    raise the_error_hypothesis_found
  File "/lib/python3.10/site-packages/hypothesis/core.py", line 1224, in wrapped_test
    state.run_engine()
  File "/lib/python3.10/site-packages/hypothesis/core.py", line 903, in run_engine
    _raise_to_user(errors_to_report, self.settings, report_lines)
  File "/lib/python3.10/site-packages/hypothesis/core.py", line 934, in _raise_to_user
    raise the_error_hypothesis_found
  File "/lib/python3.10/site-packages/hypothesis/core.py", line 866, in run_engine
    self.execute_once(
  File "/lib/python3.10/site-packages/hypothesis/core.py", line 688, in execute_once
    result = self.test_runner(data, run)
  File "/lib/python3.10/site-packages/hypothesis/executors.py", line 47, in default_new_style_executor
    return function(data)
  File "/lib/python3.10/site-packages/hypothesis/core.py", line 649, in run
    text_repr = repr_call(test, args, kwargs)
  File "/lib/python3.10/site-packages/hypothesis/internal/reflection.py", line 421, in repr_call
    bits.append(f"{p.name}={nicerepr(kwargs.pop(p.name))}")
  File "/lib/python3.10/site-packages/hypothesis/internal/reflection.py", line 405, in nicerepr
    return get_pretty_function_description(v)
  File "/lib/python3.10/site-packages/hypothesis/internal/reflection.py", line 390, in get_pretty_function_description
    return extract_lambda_source(f)
  File "/lib/python3.10/site-packages/hypothesis/internal/reflection.py", line 279, in extract_lambda_source
    assert "lambda" in source
AssertionError

I'm not sure exactly why, but it would be nice to fix this (and use #3437 to prevent a regression).

[Zac-HD]

This seems to be an upstream bug where inspect.getsource() will usually fail with OSError (which is fine), but sometimes just return a bug chunk of source code from somewhere else. Which doesn't work so well.

I'm just going to install a quick workaround and move on for now.