Poor error messaging for syntax errors inside type class and instance declarations

[bmjames]

I am using psc version 0.8.5.0. It seems that whenever I make a syntax error inside of a type class or instance declaration, the error message is always the same:

Unable to parse module:
unexpected "where"
expecting no indentation or end of input

and the location of the where keyword is given, not the location of my syntax error, which may be several lines below.

Here is a minimal example:

module Main where

class Foo a where
  foo :: a -> !!!

Compiling with psc produces:

C:\Users\Ben\purescript\hello-world>psc src\Main.purs
Error found:
at C:\Users\Ben\purescript\hello-world\src\Main.purs line 3, column 13 - line 3, column 13

  Unable to parse module:
  unexpected "where"
  expecting no indentation or end of input

This is not helpful for finding the real syntax error, which was on line 4.