eio_luv: reading a stream after closing it crashes the event loop #424
Description
Seen in mirage/ocaml-cohttp#965:
Uncaught exception in run loop:
Exception: Invalid_argument("read_start: handle used after calling close!")
Raised at Stdlib.invalid_arg in file "stdlib.ml", line 30, characters 20-45
Called from Eio_luv.Low_level.Stream.read_into.(fun) in file "vendor/eio/lib_eio_luv/eio_luv.ml", line 512, characters 32-62
We should just discontinue the fiber with the exception, not kill the whole loop.
/cc @bikallem