Inconsistent flat behavior #426
Description
Using concurrent-ruby-edge 0.2.0pre2 on jRuby 9.0.1.0.
The FlatPromise only resolves if the contained future is successful. If the inner future fails, or raises, then the flat never resolves and hangs the program if you wait or call value.
# Works
foo = Concurrent.future { Concurrent.future { 7 } }.flat
foo.value! # 7
# Fails
bar = Concurrent.future { Concurrent.future { raise "no" } }.flat
bar.value! # Hangs
# OR
baz = Concurrent.future { Concurrent.failed_future("no") }.flat
baz.value! # Hangs