#15552: Infinite loop/panic with an existential type. -------------------------------------+------------------------------------- Reporter: howtonotwin | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.4.3 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: #14723 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj):
As for the larger plan: I like all of it
What is the "all of it" that you like, specifically? There are, I think, two pieces: 1. Eliminate the bug. How? Current brand leader: add a third contructor to `MetaDetails` (comment:3). Do we have any other alternatives on the table? 2. Clean up knot tying by using `ZonkEnv` (comment:4). This is pure refactoring, and hence not urgent, but it smells right to me. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15552#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler