nushell/crates/nu-engine
Devyn Cairns 5f7afafe51
IR: fix incorrect capturing of subexpressions (#13467)
# Description


[Discovered](https://discord.com/channels/601130461678272522/614593951969574961/1266503282554179604)
by `@warp` on Discord.

The IR compiler was not properly setting redirect modes for
subexpressions because `FullCellPath` was always being compiled with
capture-out redirection. This is the correct behavior if there is a tail
to the `FullCellPath`, as we need the value in order to try to extract
anything from it (although this is unlikely to work) - however, the
parser also generates `FullCellPath`s with an empty tail quite often,
including for bare subexpressions.

Because of this, the following did not behave as expected:

```nushell
(docker run -it --rm alpine)
```

Capturing the output meant that `docker` didn't have direct access to
the terminal as a TTY.

As this is a minor bug fix, it should be okay to include in the 0.96.1
patch release.

# User-Facing Changes

- Fixes the bug as described when running with IR evaluation enabled.

# Tests + Formatting

I added a test for this, though we're not currently running all tests
with IR on the CI, but it should ensure this behaviour is consistent.
The equivalent minimum repro I could find was:

```nushell
(nu --testbin cococo); null
```

as this should cause the `cococo` message to appear on stdout, and if
Nushell is capturing the output, it would be discarded instead.
2024-07-27 19:38:57 -07:00
..
src IR: fix incorrect capturing of subexpressions (#13467) 2024-07-27 19:38:57 -07:00
Cargo.toml Bump version to 0.96.1 (#13439) 2024-07-25 18:28:18 +08:00
LICENSE Fix rest of license year ranges (#8727) 2023-04-04 09:03:29 +12:00
README.md Add top-level crate documentation/READMEs (#12907) 2024-07-14 10:10:41 +02:00

This crate primarily drives the evaluation of expressions.

(Some overlap with nu-protocol)

  • Provides CallExt

Internal Nushell crate

This crate implements components of Nushell and is not designed to support plugin authors or other users directly.