Deconstructing pointer to tuple in arguments causes ICE

[DoctorAlpaca]

This function crashes the compiler:

fn foo(~(x, y): ~(int, int)) {}

Output:

error: internal compiler error: node_id_to_type: no type for node `unknown node (id=3)`

Using & or @ pointers does the same thing.

[emberian]

This now works. Needs a test.