#8950: Typeable instances for promoted lists and tuples -------------------------------------+------------------------------------ Reporter: kosmikus | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: libraries/base | Version: 7.8.1-rc2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Comment (by goldfire): How should we treat this: {{{ data Foo = Bar deriving instance Typeable Foo deriving instance Typeable Bar }}} Is that an error (duplicate instance `Typeable Bar`)? Is it a warning? Silently ignored? What if the `deriving`s are in different modules? And, regardless of specific answers to the above, are we aiming for 7.8 with this? That is, should I be rushing this, or can I get to it when I clump together some GHC tasks? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8950#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler