Function cleanup

src/_pytest/unraisableexception.py:86–104

(
    *, config: Config, prev_hook: Callable[[sys.UnraisableHookArgs], object]
)

def cleanup(
    *, config: Config, prev_hook: Callable[[sys.UnraisableHookArgs], object]
) -> None:
    class="cm"># On PyPy, objects (e.g. coroutines) can survive GC rounds because executing
    class="cm"># their __del__ can resurrect them. The Trio project determined experimentally
    class="cm"># that 5 passes are needed on PyPy to flush everything. On CPython, reference
    class="cm"># counting handles most cleanup immediately, so 1 pass is sufficient.
    _default_gc_collect_iterations = 5 if sys.implementation.name == class="st">"pypy" else 1
    gc_collect_iterations = config.stash.get(
        gc_collect_iterations_key, _default_gc_collect_iterations
    )
    try:
        try:
            gc_collect_harder(gc_collect_iterations)
            collect_unraisable(config)
        finally:
            sys.unraisablehook = prev_hook
    finally:
        del config.stash[unraisable_exceptions]


def unraisable_hook(