Bug#927768: bash: 'read -e -u FD' reads from stdin if FD is a terminal

[Marriott NZ]

This bug is no longer reproducible on bash 5.1-alpha compiled from source (but 
it is reproducible on bash 5.0).

The changelog says:
g. `read -e' may now be used with arbitrary file descriptors (`read -u N').

That's probably it.