#15621: Error message involving type families points to wrong location -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler (Type | Version: 8.4.3 checker) | Resolution: | Keywords: TypeFamilies 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: | -------------------------------------+------------------------------------- Comment (by goldfire): But what about a function that mentions {{{#!hs let x = (Refl :: F Int :~: F Int) `seq` (Refl :: F Int :~: F Bool) `seq` () }}} We'll get the error on the wrong line, won't we? The solution to #14185 improves the status quo, but only by a lucky coincidence (that the problems in both tickets stem from two different functions). What's nice about #14185 is that it prevents the error from jumping arbitrarily far in a file, but I still don't think it's the real solution to the problem. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15621#comment:8 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler