#13342: Core Lint warnings are emitted on stdout rather than stderr -------------------------------------+------------------------------------- Reporter: mpickering | Owner: (none) Type: bug | Status: new Priority: low | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: newcomer Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by mpickering): Here is an easy way to reproduce the problem. You need a compiler compiled with `-DDEBUG` (build flavour devel2 is easiest) and then `inplace/bin/ghc-stage2 -dcore-lint A.hs` {{{ module A where f :: [()] -> [()] f (x:xs) = x : f xs {-# INLINE f #-} }}} {{{ [1 of 1] Compiling A ( cltest.hs, cltest.o ) *** Core Lint warnings : in result of Occurrence analysis *** cltest.hs:4:1: warning: [RHS of f :: [()] -> [()]] INLINE binder is (non-rule) loop breaker: f *** Core Lint warnings : in result of Simplifier *** cltest.hs:4:1: warning: [RHS of f :: [()] -> [()]] INLINE binder is (non-rule) loop breaker: f *** Core Lint warnings : in result of Occurrence analysis *** cltest.hs:4:1: warning: [RHS of f :: [()] -> [()]] INLINE binder is (non-rule) loop breaker: f *** Core Lint warnings : in result of Simplifier *** cltest.hs:4:1: warning: [RHS of f :: [()] -> [()]] INLINE binder is (non-rule) loop breaker: f *** Core Lint warnings : in result of Tidy Core *** cltest.hs:4:1: warning: [RHS of f :: [()] -> [()]] INLINE binder is (non-rule) loop breaker: f *** Core Lint warnings : in result of CorePrep *** cltest.hs:4:1: warning: [RHS of f :: [()] -> [()]] INLINE binder is (non-rule) loop breaker: f }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13342#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler