#3908: "Defined but not used" for variable used in Template Haskell splice ---------------------------------+------------------------------------------ Reporter: josh | Owner: Type: bug | Status: new Priority: normal | Component: Compiler Version: 6.12.1 | Keywords: Os: Unknown/Multiple | Testcase: Architecture: Unknown/Multiple | Failure: Incorrect warning at compile-time ---------------------------------+------------------------------------------ I encountered this warning on valid code using Template Haskell ; I had to change "name" to "_name" to make it compile warning-free.
Test case: {{{ {-# LANGUAGE FlexibleInstances, TemplateHaskell #-} import Language.Haskell.TH main :: IO () main = do let name = mkName "name" decl <- runQ [d| instance Show $(conT name) where show = undefined |] print decl }}} Warnings: {{{ TestCase.hs:6:8: Warning: Defined but not used: `name' }}} I found ticket #3873, but I don't know if it represents the same bug. -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3908> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler _______________________________________________ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs