repl: exponentiation operator SyntaxError swallowed

[Trott]

• Version: 6.2.2
• Platform: OS X
• Subsystem: repl

Use of (currently unsupported) exponentiation operator should throw SyntaxError rather than putting the user into multiline mode.

Expected:

$ node
> 2 ** 3
SyntaxError: Unexpected token *

Actual:

$ node
> 2 ** 3
... 
... 
... 
... 

Refs: #7332
Refs: https://tc39.github.io/ecma262/2016/#sec-exp-operator

[princejwesley]

working fine in master. closing it.