#16068: Unsaturated type synonyms as arguments work in 8.6.3 but not HEAD -------------------------------------+------------------------------------- Reporter: | Owner: (none) quasicomputational | Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.7 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): Yes -- you should really need `LiberalTypeSynonyms` to accept this; and it's a bug in 8.6 that it doesn't check for that. Perhaps it'd be worth adding to the 8.8 migration guide (Ben)? There are a number of other tickets on `LiberalTypeSynonyms` that Ryan is working on: eg #16059, #16013 I think. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16068#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler