#8796: -ddump-splices prints to error stream -------------------------------+------------------------------------------- Reporter: jstolarek | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.9 Resolution: | Keywords: Operating System: | Architecture: Unknown/Multiple Unknown/Multiple | Difficulty: Easy (less than 1 hour) Type of failure: | Blocked By: None/Unknown | Related Tickets: Test Case: | Blocking: | -------------------------------+------------------------------------------- Comment (by jstolarek): I looked at the code responsible for this and it seems that this was a concious decision (not sure if correct one). Code is in [[GhcFile(typecheck/TcRnMonad.lhs)]]. There's `dumpTcRn` function which uses `printInfoForUser` to print to `stderr` (`printOutputForUser` would print to `stdout`). `dumpTcRn` is used as a backend for dumping renamer and typechecker traces as well as TH splices. Now I'm not sure if all of this should be printed on stdout or just the TH splices? It seems strange to me that stderr is used as an output for more detailed debugging information. I feel this is not the intent for stderr. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8796#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler