#8612: Error message "not in scope" on missing 'deriving' ------------------------------------+------------------------------------- Reporter: mirpa | Owner: Type: bug | Status: new Priority: low | Milestone: Component: Compiler | Version: 7.4.1 Keywords: | Operating System: Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ------------------------------------+------------------------------------- Incorrect definition like: {{{ module Der where data A = A { a :: Int } (Show) -- missing deriving }}} gives error message: {{{ der.hs:3:14: Not in scope: `a' }}} I had bigger data structure, where I concentrated on {{{a :: Int}}} part between parentheses trying to figure out why {{{a}}} is not defined. Missing {{{deriving}}} could easily escape your eye in such case. I would like to get something like: {{{ der.hs:4:14: Unexpected `(' }}} For instance Hugs says: {{{ ERROR "der.hs":4 - Syntax error in input (unexpected `(') }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8612 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler