clippy::iter_out_of_bounds: this `.take()` call takes more items than the iterator will produce

What you see

warning: this `.take()` call takes more items than the iterator will produce
 --> main.rs:3:10
  |
3 | for _ in [1, 2, 3].iter().take(4) {}
  |          ^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: this operation is useless and the returned iterator will simply yield the same items
  = help: for further information visit https://rust-lang.github.io/rust-clippy/stable/index.html#iter_out_of_bounds
  = note: `#[warn(clippy::iter_out_of_bounds)]` on by default

Real output of Clippy 0.1.99 (Rust 1.99) on the example below. Names and line numbers in yours will differ.

Does it matter?

Taking or skipping more items than there are in an iterator either creates an iterator with all items from the original iterator or an iterator with no items at all. This is most likely not what the user intended to do.

Code that is most likely wrong or useless. Warns by default.

How to fix it

Clippy does not fix this one automatically. Change the code by hand:

Flagged

for _ in [1, 2, 3].iter().take(4) {}

Write this instead

for _ in [1, 2, 3].iter() {}

Turn it off, or on

Allow it where it does not fit your code, as narrowly as you can:

#[allow(clippy::iter_out_of_bounds)]
fn my_function() { /* ... */ }

[lints.clippy]
iter_out_of_bounds = "allow"

cargo clippy -- -A clippy::iter-out-of-bounds

The [lints] table needs Rust 1.74 or newer. In a workspace, put it under [workspace.lints.clippy] and add [lints] workspace = true to each member.