Invalid FC of Pi-types

[spcfox]

FC of Pi-type with named argument points to the name of the argument instead of whole type.

Steps to Reproduce

Main> getFC `((Nat) -> Nat)
MkFC (Virtual Interactive) (0, 8) (0, 20)
Main> getFC `((arg : Nat) -> Nat)
MkFC (Virtual Interactive) (0, 9) (0, 12)

This is the reason for the bad error messages. Example:

unnamed : ()
unnamed = (Nat) -> Nat

named : ()
named = (arg : Nat) -> Nat

Error: While processing right hand side of unnamed. When unifying:
    Type
and:
    ()
Mismatch between: Type and ().

BadMessages:4:11--4:23
 1 | module BadMessages
 2 | 
 3 | unnamed : ()
 4 | unnamed = (Nat) -> Nat
               ^^^^^^^^^^^^

Error: While processing right hand side of named. When unifying:
    Type
and:
    ()
Mismatch between: Type and ().

BadMessages:7:10--7:13
 3 | unnamed : ()
 4 | unnamed = (Nat) -> Nat
 5 | 
 6 | named : ()
 7 | named = (arg : Nat) -> Nat
              ^^^

Expected Behavior

FC points to whole type

Observed Behavior

FC points to the name of the argument