[nhc-bugs] the format of error diagnostics

[Feliks Kluzniak]

> |      file1.hs:4:8:  Error after type deriving/checking:
> |                     Type error type clash between Prelude.Int and Main.Foo
> |                     when trying to apply function to its 1:st argument
> |      file2.hs:4:17: (the function is defined here).
> 
> Unfortunately, that is not what the current error message means.
> The function is not defined at line 4, column 17 - it is used at that
> position.  The function is at 4:17, the argument is at 4:8 (this is
> an infix application), and the definition is somewhere else, possibly
> not even in this module.  It could be the function definition that

OK, sorry for misunderstanding the message.  But my point remains: the format of
the diagnostic message should support Emacs compile mode in locating the two
points of interest.

Regards,
-- F.