PropName needs to be updated too

[anba]

https://tc39.github.io/ecma262/#sec-object-initializer-static-semantics-propname

PropName needs to handle the new ...AssignmentExpression syntax:

---

PropertyDefinition : ... AssignmentExpression

1. Return empty.

[caiolima]

In this case, what does it evaluate?

let {a, b, ...c=15} = {a: 5, b: 7, c:30, d: 40}

[anba]

In this case, what does it evaluate?

It throws a SyntaxError.

• Binding rest properties only allow binding identifiers and binding patterns: https://tc39.github.io/proposal-object-rest-spread/#prod-BindingRestProperty
• Assignment rest properties report an early error if the target is neither an assignment pattern nor a simple assignment target: https://tc39.github.io/ecma262/#sec-destructuring-assignment-static-semantics-early-errors

[caiolima]

You are right, now I know you are referring another issue. My question was totally unrelated. Sorry.