Arrow function parameters

gistfile1.js

eval => 42; // ok
(eval) => 42; // ok
(eval, a) => 42; // ok

(a, a) => 42; // Syntax error per 14.1.1 (StrictFormalParameters : FormalParameters)
"use strict"; (eval) => 42; // Syntax error per 14.2.10
(eval) => { "use strict"; }; // Syntax error per 14.2.10

// Syntax errors per 14.1.1 (FormalParameters : FormalParameterList), since IsSimpleParameterList is false
// This is changing to be allowed?
(eval, a = 10) => 42;
(eval = 10) => 42;

yes to line 10. I've removed that rule. so lines 11 and 12 are ok, but these will be syntax errors as a script:

"use strict"; (eval, a = 10) => 42;
"use strict"; (eval = 10) => 42;