false positive "variable does not need to be mutable" report when mutating a variable with a pattern in a closure

[1e1001]

rust-analyzer version: rust-analyzer version: 1.83.0-nightly (fa724e5 2024-09-27) (also occurs with the vscode bundled rust-analyzer)

rustc version: rustc 1.83.0-nightly (fa724e5d8 2024-09-27)

editor or extension: VSCode (rust-analyzer v0.3.2121)

relevant settings: "rust-analyzer.diagnostics.experimental.enable": true

repository link (if public, optional): none

code snippet to reproduce:

#![no_std]
fn main() {
	let mut var = 1;                 // variable does not need to be mutable  rust-analyzer(unused_mut)
	let mut func = || (var,) = (2,); // variable does not need to be mutable  rust-analyzer(unused_mut)
	func();
}

Removing either mut causes errors building (for obvious reason)

The combination of the variable being in the closure and the tuple pattern causes rust-analyzer to not think that var got mutated, removing either of them removes the error

[ChayimFriedman2]

@rustbot claim