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 x
into GHCi and ask :info P
, I get
pattern P :: () => t GHC.Prim.~# Bool => Bool -> T t
That 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 |