Invalid code emitted when function argument is explicitly typed as null or undefined

TypeScript Version: nightly (Version 2.1.0-dev.20161011)

Code

// A *self-contained* demonstration of the problem follows.
// Ditto for null, haven't tested with 'never' ...
function foo(value: undefined) {
  return value;
}

Expected behavior:
Should produce syntactically valid JavaScript.

Actual behavior:
Instead this is emitted by the compiler:

function foo(value: ) {
    return value;
}

resulting in runtime error:

function foo(value: ) {
                  ^
SyntaxError: Unexpected token :

[mhegazy]

Looks like another manifestation of #11295

I concur with @mhegazy that it is indeed the case of another manifestation of #11295.

My suggestion is to mark this latest report as a duplicate of said prior issue and add my demonstration code to the test(s) for the eventual fix. Further suggest that all bottom types, viz, null, undefined & never, be included in the tested types.

[mhegazy]

should be fixed in #11653