Skip to content

Out-of-scope variable leads to type error, not scope error

When I write the following:

{-# language TypeApplications #-}

module Bug where

huh = spam @Int

I expect to get the error:

    • Variable not in scope: spam
    • Perhaps you meant ‘span’ (imported from Prelude)

But instead, I get the error:

    • Cannot apply expression of type ‘t0’
      to a visible type argument ‘Int’
    • In the expression: spam @Int
      In an equation for ‘huh’: huh = spam @Int

While it is //technically// true that I cannot apply an out-of-scope identifier to a visible type argument, this is probably the less useful error to receive.

Trac metadata
Trac field Value
Version 8.0.1
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler (Type checker)
Test case
Differential revisions
BlockedBy
Related
Blocking
CC goldfire
Operating system
Architecture
Edited by Richard Eisenberg
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information