Surrounding pair doesn't work with invalid empty lambda

[pokey]

In the following Typescript code:

(() => ())

Saying "take pair" from the => should select the whole line, but just gives an error. I don't believe this is valid Typescript (something needs to be between second pair of inner parens for it to be a valid lambda), but it should still be handled correctly by our code that is supposed to fall back to textual when in an error node