"Remove Unused Parameter" panics on nested call

[DorianListens]

rust-analyzer version: 0.0.0 (5342f47 2022-07-09)

rustc version: rustc 1.62.0 (a8314ef7d 2022-06-27)

When invoking "Removed Unused Parameter", if there is call to the function within the argument list of another call to the function, the request handler panics, failing the check_disjoint_and_sort(indels) assert.

fn foo(x: i32, <|>y: i32) -> i32 {
    x
}

fn bar() {
    foo(1, foo(2, 3));
}

Expected:

fn foo(x: i32) -> i32 {
    x
}

fn bar() {
    foo(1);
}

Actual:
request handler panicked: assertion failed: check_disjoint_and_sort(indels)

[DorianListens]

Discussed this a little on zulip, I think I've got a path to fix this one.