
Dear GHCi / IO experts, I'm encountering some odd GHCi behaviour with some old ghci.conf code of mine (used to work in older GHCis). The problem is that my code for redirecting the output of GHCi commands still works for things like :type, but no longer for things like :info (this is my smallest example demonstrating the effect). With the attached GHCi script defining a :redir <var> <command> command that should redirect the ouput of <command> into variable <var>, we get the output appended below (note the Exception for WriteConsole "handle is invalid", which is written into the temporary file when :info is called while stdout is redirected to that temporary file; in other words, the error message appears where the output of the command fails to appear). Is that an expected change with a known workaround, so that I just need to update my code, or is that unexpected behaviour that can only be fixed in GHCi? Claus PS. This is on Windows 7, if that matters. ------------- example session output $ ghcii.sh -ignore-dot-ghci GHCi, version 6.12.3: http://www.haskell.org/ghc/ :? for help .. Prelude> :cmd readFile "redir.script" Prelude> :redir x :t map .. Prelude> x "-- logging GHCi stdout\nmap :: (a -> b) -> [a] -> [b]\n" Prelude> :redir y :i map Prelude> y "-- logging GHCi stdout\n*** Exception: WriteConsole: invalid argument (Das Handle ist ung\252ltig.)\n"