Internal error with PartialTypeSignatures and TH
File:
{-# LANGUAGE TemplateHaskell #-}
type T = $([t| _ |])gives a bad error message in 8.4 and HEAD:
• GHC internal error: ‘_’ is not in scope during type checking, but it passed the renamer
tcl_env of environment: [r1sn :-> ATcTyCon T :: k0]
• In the type ‘(_)’
In the type declaration for ‘T’Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.4.3 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |