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# Description
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Original implementation contains multiple `expect` which can cause
internal runtime panic.
This pr forks the `css` selector impl and make it return an error that
nushell can recognize.
**Note:** The original impl is still used in pre-defined selector
implementations, but they
should never fail, so the `css` fn is preserved.
Closes#13496.
# User-Facing Changes
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Now `query web` will not panic when the `query` parameter is not given
or has syntax error.
```plain
❯ .\target\debug\nu.exe -c "http get https://www.rust-lang.org | query web"
Error: × CSS query parse error
╭─[source:1:38]
1 │ http get https://www.rust-lang.org | query web
· ────┬────
· ╰─┤ Unexpected error occurred. Please report this to the developer
· │ EmptySelector
╰────
help: cannot parse query as a valid CSS selector
```
# Tests + Formatting
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- [x] `cargo fmt --all -- --check` to check standard code formatting
(`cargo fmt --all` applies these changes)
- [x] `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used`
to check that you're using the standard code style
- [x] `cargo test --workspace` to check that all tests pass (on Windows
make sure to [enable developer
mode](https://learn.microsoft.com/en-us/windows/apps/get-started/developer-mode-features-and-debugging))
- [x] `cargo run -- -c "use toolkit.nu; toolkit test stdlib"` to run the
tests for the standard library
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# After Submitting
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- [x] Impl change, no doc update.
---------
Co-authored-by: Stefan Holderbach <sholderbach@users.noreply.github.com>
af34d5c062