Round trip to blocks and back causes semantic differences for local scoped variables

Copy past the following program to typescript

function gameOfLife() {
    for (let b = 0; b <= 4; b++) {
        let count = 0
        basic.showNumber(count + b)
        count += 1
    }
}
gameOfLife()

Output: 0,1,2,3,4

Convert to blocks and back to typescript.

let count = 0
function gameOfLife() {
    for (let b = 0; b <= 4; b++) {
        basic.showNumber(count + b)
        count += 1
    }
}
gameOfLife()

Now the count variable is hoisted and output is different (0,2,4,6,8). This is due to fact that set to count is not reset.

count is treated as global variable in typescript. But we shouldn't get rid of set at the local scope.