On Wed, Nov 15, 2023 at 8:58 PM Bart Schaefer <schaefer@brasslantern.com> wrote:
>
> > > > > read foo < <(read bar; echo $bar) </dev/tty
> >
> > ... the multio loop is still reading /dev/tty and won't discover
> > until its I/O buffers fill up that "read foo" isn't consuming any more
> > input.

I fact it never notices then, either.

> Replace /dev/tty with /dev/zero and we're back to the unkillable loop.

Why not this?  Any reason that errors from write_loop() should be ignored?