`inspect.getgeneratorstate()` fails on `_GeneratorWrapper` with `AttributeError: gi_suspended`

[hyongtao-code]

Bug report

Bug description:

When a generator function decorated with @types.coroutine returns a generator, calling inspect.getgeneratorstate() on the resulting _GeneratorWrapper object raises an AttributeError. This happens because _GeneratorWrapper does not have the gi_suspended attribute expected by inspect.getgeneratorstate().

Python script repro

import inspect
import types

def legacy_stepper():
    yield 1
    yield 2

@types.coroutine
def await_legacy():
    return legacy_stepper()

task = await_legacy()

print("awaitable type:", type(task))

print("state:", inspect.getgeneratorstate(task))

Wrong behavior

d:\MyCode\cpython\PCbuild\amd64>python_d.exe py_suspended.py
awaitable type: <class 'types._GeneratorWrapper'>
Traceback (most recent call last):
  File "d:\MyCode\cpython\PCbuild\amd64\py_suspended.py", line 16, in <module>
    print("state:", inspect.getgeneratorstate(task))
                    ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
  File "d:\MyCode\cpython\Lib\inspect.py", line 1817, in getgeneratorstate
    if generator.gi_suspended:
       ^^^^^^^^^^^^^^^^^^^^^^
AttributeError: '_GeneratorWrapper' object has no attribute 'gi_suspended'

Potential solutions

Add gi_suspended properties to _GeneratorWrapper that delegate to the wrapped generator.

CPython versions tested on:

CPython main branch

Operating systems tested on:

Windows

Linked PRs

• gh-143999: Fix: handle suspended state on types.coroutine wrappers #144000