[4.0.7, 4.0.8, 4.0.9] Missing "Illegal 'use strict' directive" error

[mysticatea]

In the following cases, it should throw SyntaxError "Illegal 'use strict' directive in function with non-simple parameter list". Acorn had worked correctly until 4.0.6, but currently Acorn does not throw.

Whether strict mode or not, it should throw early syntax errors if there is "use strict" directive in the body of functions which have non-simple parameters.

// in sourceType: "script"

"use strict"
function foo(a = 1) {
  "use strict"
}

// in sourceType: "module"

function foo(a = 1) {
  "use strict"
}

---

It is a Syntax Error if ContainsUseStrict of FunctionBody is true and IsSimpleParameterList of FormalParameters is false.
https://www.ecma-international.org/ecma-262/7.0/#sec-function-definitions-static-semantics-early-errors