Confusing flags for rewrite rules
Functions exported via rewrite rules are incorrectly flagged as "defined but not used" when -Wall is enabled:
module M ({- rules -}) where
eq :: Eq a => a -> a -> Bool
eq = (==)
{-# RULES
"rule 1" forall x. x == y = y `eq` x
#-}
Will emit a bogus:
M.hs:4:0: Warning: Defined but not used: `eq'
Trac metadata
Trac field | Value |
---|---|
Version | 6.8.2 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | rules, warnings |
Operating system | Unknown |
Architecture | Unknown |