ajklein

1. Evaluate all computed names before any values in object literals needs a champion (Jordan Harband for Daniel Ehrenberg)
2. Remove ToUint32 from array literal evaluation (Jordan Harband for Daniel Ehrenberg)
3. Prevent DFS invariants from being broken (Jordan Harband for Gus Caplan)
4. Redefine CatchParameter as FormalParameter (Jordan Harband for Sergey Rubanov)
5. Reduce the amount of implementation-defined behavior in Array.prototype.sort (slides) (Mathias Bynens)
6. Strengthening Atomics.wait and Atomics.notify (PR) ([slides](https://docs.google.com/presentation/d/1EwlEhNxSLs0spaKrvR44ogiKj69ZcyIN

ajklein

class CaseInsensitiveSet extends Set {
  add(key) {
    return super.add(key.toLowerCase());
  }

  delete(key) {
    return super.delete(key.toLowerCase());
  }

  has(key) {

ajklein

// What does this code do?
function f(x = eval("var z = 2; 1"), y = z) {
  return [x, y, z];
}
f();

// Spec says to throw a ReferenceError, since 'z' is not visible either
// to other parameters in the list, or to the function body.
// 
// Results in various engines:

ajklein

String.prototype.split ( separator, limit )

Splits the receiver at separator, returns an Array of at most limit segments.

ES5 (15.5.4.14.5): If limit is undefined, let lim = 2³²-1; else let lim = ToUint32(limit).

ES6 (21.1.3.17.8): If limit is undefined, let lim = 2⁵³-1; else let lim = ToLength(limit).

Two problems

• Return value is an Array, so a limit greater than 2³²-1 would result in a "malformed" array (one with elements past the end of the array). Iteration over the return value will skip all such elements.