Name shadowing not working in v0.14.0

[SWW13]

test.rn:

pub fn main() {
    let x = Some(1);
    
    if let Some(x) = x {
    	println!("{}", x);
    }
}

Rune v0.13.4:

$ rune run test.rn
1

Rune v0.14.0 (2d69c58):

$ rune run test.rn
error: Missing variable `3`
  ┌─ test3.rn:4:22
  │
4 │     if let Some(x) = x {
  │                      ^ Missing variable `3`

Error: Failed to build rune sources (see diagnostics for details)