Weird scoping for tyvars in rules
This rule:
{-# RULES "id" forall (x :: a). id x = x #-}
compiles fine with no LANGUAGE
options but fails if I add Rank2Types
:
Not in scope: type variable `a'
It compiles fine again if I additionally include ScopedTypeVariables
. This looks wrong to me.
Trac metadata
Trac field | Value |
---|---|
Version | 6.8.3 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | Unknown |
Architecture | Unknown |