useless_let_if_seq should not emit a warning if multiple assignments happen

I have code that looks like this:

let img_x: u32;
let img_y: u32;
let pattern_x: u32;
let pattern_y: u32;

if forward {
    img_x = start_x + scan_x;
    img_y = start_y + scan_y;
    pattern_x = scan_x;
    pattern_y = scan_y;
} else {
    img_x = start_x - scan_x;
    img_y = start_y - scan_y;
    pattern_x = scan_width - scan_x - 1;
    pattern_y = scan_height - scan_y - 1;
}

Am I right in thinking that this should be ok with clippy or is there actually a more idiomatic way of doing something like this?

If people agree with me, I'll fix the bug.

Start by locating the useless_let_if_seq lint and reproduce the issue with the Rust snippet in this report. Confirm the expected behavior for multiple assignments in both branches, then add or update coverage so the lint no longer warns for this case.