`integer_division_remainder_used` not triggered by `DivAssign`/`RemAssign`

[tarcieri]

Summary

We had a line that looked like:

r1.0 /= TwoGamma2::U32;

For some reason that didn't trigger the lint. Seems it's a general problem with DivAssign/RemAssign

Full context: https://github.com/RustCrypto/signatures/pull/1144/files#diff-9d6b7776479a0f5978554cc71e1bba410f373fa4fc5fd1df3462e8a71e5f40deL67

(note: this was a potential security vulnerability it would've been nice to have caught)

Lint Name

integer_division_remainder_used

Reproducer

#![warn(clippy::integer_division_remainder_used)]

pub fn div_by_three(mut x: u16) -> u16 {
    x /= 3;
    x
}

pub fn rem_by_three(mut x: u16) -> u16 {
    x %= 3;
    x
}

Version

clippy 0.1.93 (254b59607d 2026-01-19)

[tarcieri]

cc @Jacherr @felix91gr

[tarcieri]

I suppose another gap here is additional division methods like {integer}::div_* e.g. div_ceil and checked_div:

https://doc.rust-lang.org/std/primitive.u32.html#method.div_ceil