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closing async_generator_athrow on an async generator that suppresses GeneratorExit does not raise RuntimeError #117714

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@graingert

Description

@graingert

Bug report

Bug description:

when running agen.aclose().close() it should throw GeneratorExit into the coroutine and raise RuntimeError from .close():

import types

@types.coroutine
def _async_yield(v):
    return (yield v)

async def agenfn():
    try:
        yield 1
    finally:
        try:
            await _async_yield(2)
        except GeneratorExit:
            print("generator exit")
            await _async_yield(3)


agen = agenfn()
try:
    anext(agen).send(None)
except StopIteration as e:
    print(e.value)

try:
    agen.aclose().close()
except RuntimeError:
    print("good")
else:
    print("bad")

prints:

1
bad
Exception ignored in: <async_generator object agenfn at 0x7e0c43b09620>
RuntimeError: async generator ignored GeneratorExit

CPython versions tested on:

3.11, 3.12, 3.13, CPython main branch

Operating systems tested on:

Linux

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    3.12only security fixes3.13bugs and security fixesinterpreter-core(Objects, Python, Grammar, and Parser dirs)type-bugAn unexpected behavior, bug, or error

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