#16358: Confusing ghci error message -------------------------------------+------------------------------------- Reporter: lerkok | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.6.3 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- {{{ $ ghci GHCi, version 8.6.3: http://www.haskell.org/ghc/ :? for help Prelude> import qualified Data.Set as S Prelude S> S.foo <interactive>:2:1: error: Not in scope: ‘S.foo’ No module named ‘S’ is imported. }}} I'm curious why `ghci` says `No module named 'S' is imported`. I found it very confusing. I'd have expected it to say one of three things: 1. `Module Data.Set referenced via S does not export foo` 2. `Constructor S not in scope` 3. `Variable foo not in scope` The first one would be the most informative, but I can see that the second and the third messages might be quite reasonable as well due to the interpretation of dot as composition. But the message `No module S is imported` is quite confusing given I just issued `import qualified Data.Set as S`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16358 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler