Crash on fish after CTRL-R when command contains pipe

[JanPokorny]

Steps to reproduce:

1. Configure fish to use latest mcfly (0.6.0)
2. Type cat | touch hello
3. Press CTRL-R
4. Observe:

❯ cat | touch hellothread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 25, kind: Uncategorized, message: "Inappropriate ioctl for device" }', src/interface.rs:390:73

• McFly crashed
• The command touch hello was actually executed! Try ls hello to confirm the file now exists

It seems that this happens every time there's a pipe in the typed command, and it executes the part of command after the pipe.

[cantino]

I reproduced this bug as well.

@tjkirch or @domoritz, do either of you have any ideas? I don't use fish personally.