#13912: Disparity in error message in GHCi with : load vs writing directly in GHCi -------------------------------------+------------------------------------- Reporter: vanto | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: GHCi | Version: Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: Poor/confusing Unknown/Multiple | error message Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- {{{ module Maintest where a:: Int a = 'a' main = print "b" }}} If I load this program with the command {{{:load}}} its answer is\\ {{{ Prelude> :l maintest [1 of 1] Compiling Maintest ( maintest.hs, interpreted ) maintest.hs:4:5: error: * Couldn't match expected type `Int' with actual type `Char' * In the expression: 'a' In an equation for `a': a = 'a' | 4 | a = 'a' | ^^^ Failed, modules loaded: none. Prelude> }}} If I write this program directly in GHCi, its answer is\\ {{{ Prelude> :{ Prelude| module Maintest where Prelude| a:: Int Prelude| a = 'a' Prelude| main = print "b" Prelude| :} <interactive>:20:5: error: * Couldn't match expected type `Int' with actual type `Char' * In the expression: 'a' In an equation for `a': a = 'a' Prelude> }}} This information has disappeared\\ {{{ | 4 | a = 'a' | ^^^ }}} The version of GHCi used is this one {{{GHCi, version 8.2.0.20170507}}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13912 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler