Otherwise, the cycle can be broken by clearing the references of the helper
objects, at which points the deallocation of arrays proceeds through regular
reference counting (and does not trigger logs!). I have not verified that
this is what happens, but the test has been mysteriously failing under a
number of configurations and this seems to fix it.
I added a note to the garbage collection guard to clarify that it's not
guaranteed to report all cycles.
PiperOrigin-RevId: 708320953
d2f937e241