Panic on degenerate closed type family
Creating a degenerate closed type family via TH gives a panic in toBranchList.
module T where
import Language.Haskell.TH
x = do n <- newName "F"
return [ClosedTypeFamilyD n [] Nothing []]module A where
import T
$(x)Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.7 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler (Type checker) |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |