src/third_party/mozjs-45/js/src/jit-test/tests/basic/testBug692274-3.js

var x = -false;
switch(x) {
    case 11: 
    let y = 42;
}
switch(x) {
    case 11: 
    let y = 42;
    let z = 'ponies';
}
switch(x) {
    case 11: 
    let y = 42;
    let z = 'ponies';
    let a = false;
}