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# Description
It's not a good idea to save `stdout` and `stderr` to the same file from
`save` command directly.
Because it saves `stdout` and `stderr` in different thread, which leads
to in-consistent output. As replace, we can use `o+e` redirection to fix
the issue
# User-Facing Changes
```
❯ do -i { "aa" } | save foo.txt -e foo.txt
Error: × input and stderr input to same file
╭─[entry #3:1:1]
1 │ do -i { "aa" } | save foo.txt -e foo.txt
· ───┬───
· ╰── can't save both input and stderr input to the same file
╰────
help: you should use `o+e> file` instead
```
# Tests + Formatting
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Don't forget to add tests that cover your changes.
Make sure you've run and fixed any issues with these commands:
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- `cargo run -- crates/nu-std/tests/run.nu` to run the tests for the
standard library
> **Note**
> from `nushell` you can also use the `toolkit` as follows
> ```bash
> use toolkit.nu # or use an `env_change` hook to activate it
automatically
> toolkit check pr
> ```
-->
# After Submitting
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