Weird as heck closure bug

[Nikos1001]

import 'io' as io

const endThis = fn -> {
    var t = 0
    var x = 0
    while t < 5 * {
        t = t + 1
        var p = fn -> t = 10
        p()
    } io.print(x = x + 1)
}
endThis()

Segfaults :(