#9576: -fdefer-type-errors doesn't defer errors from `deriving` -------------------------------------+------------------------------------- Reporter: goldfire | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.3 Keywords: | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Unknown | Type of failure: Blocked By: | None/Unknown Related Tickets: | Test Case: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- When I say {{{#!hs {-# OPTIONS_GHC -fdefer-type-errors #-} data Foo = MkFoo data Bar = MkBar Foo deriving Show }}} I get a type error that there is no instance for `Show Foo`. This error should be deferred. Using standalone-deriving works just fine, though. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9576 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler