#7947: Name conflict with DerivingDataTypeable, StandaloneDeriving and qualified imports -------------------------------------+------------------------------------- Reporter: a.ulrich | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler (Type | Version: 7.7 checker) | Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: GHC rejects | Test Case: valid program | deriving/should_compile/T7947 Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by Austin Seipp ): In [changeset:"d4d34a73aacc225a8f28d7138137bf548c9e51cc/ghc" d4d34a73/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="d4d34a73aacc225a8f28d7138137bf548c9e51cc" Make derived names deterministic The names of auxiliary bindings end up in the interface file, and since uniques are nondeterministic, we end up with nondeterministic interface files. This uses the package and module name in the generated name, so I believe it should avoid problems from #7947 and be deterministic as well. The generated names look like this now: `$cLrlbmVwI3gpI8G2E6Hg3mO` and with `-ppr-debug`: `$c$aeson_70dylHtv1FFGeai1IoxcQr$Data.Aeson.Types.Internal$String`. Reviewed By: simonmar, austin, ezyang Differential Revision: https://phabricator.haskell.org/D1133 GHC Trac Issues: #4012 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/7947#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler