no-mutated-range-bound

Disallow mutating range bounds during iteration over that range

A range captures its bounds before iteration, so mutating their source storage cannot change the active traversal.
Instead, you SHOULD leave captured bounds unchanged or use a conditional loop when each iteration must observe an updated bound.

- Category: suspicious
- Level: warning
- Fix: none
- Scope: module

Reported

function visit(limit: int32): void {
    let end = limit;
    for (const value of 0..end) {
        end -= 1;
        value;
    }
}
Accepted

function visit(limit: int32): void {
    let end = limit;
    for (const value of 0..end) {
        value;
    }
}
Prior art

- Clippy · mutrangebound

language/linter/src/rules/suspicious/nomutatedrangebound.rs:8