Inconsistent failures when using negated commands

[SamK]

Description

When using the negate exclamation mark (`!) in the cmd, Task sometimes does not honor the exit code.

This behavior has been introduced in the 3.44.1 release and can be reproduced with the 3.46.0-nightly release.
The preconditions block is affected too.

In the example Taskfile, the first two commands should exit successfully but fail instead.

Version

task-3.46.0-nightly

Operating system

Linux

Experiments Enabled

No response

Example Taskfile

---
version: 3

tasks:

  should-succeed:
    cmds:
      - |
        ! stat foo

  should-succeed2:
    cmds:
      - |
        ! ls foo

  does-succeed-as-expected:
    cmd: |
      ! false

  does-succeed-as-expected2:
    cmds:
      - |
        ! test -f foo

[trulede]

Waiting on new version of mvdan/sh which contains the fix.