[PATCH] fhandler_pipe: add sanity limit to handle loops

[Jeremy Drake]

On Sun, 26 Dec 2021, Takashi Yano wrote:

> Could you please check the result of the following test case
> in that ARM64 platform?
>

I will probably not be able to get to this until tomorrow at the earliest.
But keep in mind the issue I'm seeing is not deterministic - I have to run
pacman in a loop validating files via GPGME and eventually it will hang
(or hit the assert I added in that version).  Most of the time, it's
perfectly fine.