GHC.Prim.~# shows up unexpectedly in a pattern synonym type
When I load
data T a where
MkT :: Bool -> T Bool
pattern P x <- MkT xinto GHCi and ask :info P, I get
pattern P :: () => t GHC.Prim.~# Bool => Bool -> T tThat should say t ~ Bool without -fprint-equality-relations.
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 | |
| Operating system | |
| Architecture |