[Bug] mutable bool in conditional branch causes must resolve to a boolean

[0rphon]

🐛 Bug Report

Code snippet to reproduce

function main () {
    let mut x = true;
    if x {
        let y = 0u8;
    }
}

Stack trace & error message

 Compiling Starting...
 Compiling Compiling main program... ("d:\\Work\\leo_playground\\src/main.leo")
 Compiling     --> "d:\\Work\\leo_playground\\src/main.leo": 3:5
     |
   3 |      if x {
     |  ^^^^
     |
     = If, else conditional must resolve to a boolean, found `true`

Your Environment

• leo's latest master commit ed395a0
• rustc 1.49.0 (e1884a8e3 2020-12-29)
• windows 10 build 10.0.19042.746

[0rphon]

not fixed by asg ( 2657c44)