#12692: Can't find interface-file decl with Typeable -------------------------------------+------------------------------------- Reporter: crockeea | Owner: Type: bug | Status: closed Priority: normal | Milestone: 8.0.2 Component: Compiler | Version: 8.0.1 Resolution: duplicate | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash | Test Case: Blocked By: | Blocking: Related Tickets: #12132 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by RyanGlScott): * status: new => closed * resolution: => duplicate * related: => #12132 * milestone: => 8.0.2 Comment: This is really #12132 in disguise (which has been fixed in GHC 8.0.2 and HEAD). You can see this by observing the output of compiling `Main` with `-ddump-splices`: {{{ [3 of 3] Compiling Main ( Main.hs, interpreted ) Main.hs:7:3-26: Splicing declarations sequence [ppDec $ (2, 1)] ======> type PP2 = PP '(P (PosBin.D0 PosBin.B1), PosBin.O) }}} The key part is that `PP2` contains a promoted boxed tuple, and the error happens when you try to get the `Typeable` instance for it. In any case, this has already been fixed, and it'd be impractical to create a regression test from all of this `singletons` code, so I'll just close this as a duplicate. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12692#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler