#15428: Oversaturated type family application panicks GHC (piResultTys2) -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: new Priority: high | Milestone: 8.6.1 Component: Compiler | Version: 8.5 Resolution: | Keywords: TypeInType, | TypeFamilies Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Simon Peyton Jones <simonpj@…>): In [changeset:"e1b5a1174e42e390855b153015ce5227b3251d89/ghc" e1b5a11/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="e1b5a1174e42e390855b153015ce5227b3251d89" Fix a nasty bug in piResultTys I was failing to instantiate vigorously enough in Type.piResultTys and in the very similar function ToIface.toIfaceAppArgsX This caused Trac #15428. The fix is easy. See Note [Care with kind instantiation] in Type.hs }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15428#comment:4> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler