Damn

issue.js

var a = new Float32Array([1,3,6,7,8,12]);

var b = a.filter(function(x){
  return x > 0;
});

print( typeof Object.getPrototypeOf(b));








var sample = new Float32Array(4);
var calls = 0;

sample.constructor = { get [Symbol.species]() { calls++ } };
var result = sample.filter(function() { return true;});

print( calls)
print( typeof Object.getPrototypeOf(result));
print(result.length);