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GHC internal error: ‘Y’ is not in scope during type checking, but it passed the renamer

{-# LANGUAGE TypeInType #-}
data X :: Y where Y :: X

The error message is:

Bug.hs:2:11: error: …
    • GHC internal error: ‘Y’ is not in scope during type checking, but it passed the renamer
      tcl_env of environment: [r1cR :-> APromotionErr TyConPE]
    • In the kind ‘Y’

Originally reported by @mietek in #11821 (closed)

Trac metadata
Trac field Value
Version 8.0.1
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC mietek
Operating system
Architecture
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