Exception when testing non-existent property of Uint32Array and bug with throw inside switch()

just a "picture" without words;)

process.on('uncaughtException', function(err) {
  console.log('!!!UNCAUGHTEXCEPTION!!!',er­r);
});

const arr= new Uint32Array([1,2,3,4]);     // or any other ArrayView

console.log('test E...');
if (!E.xyz) console.log('E ok');   // works as expected
console.log('test arr...');
if (!arr.xyz) console.log('arr ok'); // throws exception - not as expected
console.log('done all ok');

EspruinoWIFI 1v96