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# Description The correction made here concerns the issue #8431. Indeed, the algorithm initially proposed to remove elements of a `vector` performed a loop with `remove` and an incident therefore appeared when several values were equal because the deletion was done outside the length of the vector: ```rust let mut found = false; for (i, col) in cols.clone().iter().enumerate() { if col == col_name { cols.remove(i); vals.remove(i); found = true; } } ``` Then, `[[a, a]; [1, 2]] | reject a: ` gave `thread 'main' panicked at 'removal index (is 1) should be < len (is 1)', crates/nu-protocol/src/value/mod.rs:1213:54`. The proposed correction is therefore the implementation of the `retain_mut` utility dedicated to this functionality. ```rust let mut found = false; let mut index = 0; cols.retain_mut(|col| { if col == col_name { found = true; vals.remove(index); false } else { index += 1; true } }); ``` |
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nu-protocol
The nu-protocol crate holds the definitions of structs/traits that are used throughout Nushell. This gives us one way to expose them to many other crates, as well as make these definitions available to each other, without causing mutually recursive dependencies.