clippy::iterator_step_by_zero: `Iterator::step_by(0)` will panic at runtime

What you see

error: `Iterator::step_by(0)` will panic at runtime
 --> main.rs:3:10
  |
3 | for x in (0..100).step_by(0) {
  |          ^^^^^^^^^^^^^^^^^^^
  |
  = help: for further information visit https://rust-lang.github.io/rust-clippy/stable/index.html#iterator_step_by_zero
  = note: `#[deny(clippy::iterator_step_by_zero)]` 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?

This very much looks like an oversight. Use panic!() instead if you actually intend to panic.

Code that is almost certainly wrong. Denied by default: the build fails until you fix it or allow it.

How to fix it

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

Flagged

for x in (0..100).step_by(0) {
    //..
}

Turn it off, or on

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

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

[lints.clippy]
iterator_step_by_zero = "allow"

cargo clippy -- -A clippy::iterator-step-by-zero

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.