#11608: Possible type-checker regression in GHC 8.0 when compiling `microlens` -------------------------------------+------------------------------------- Reporter: hvr | Owner: simonpj Type: bug | Status: new Priority: highest | Milestone: 8.0.1 Component: Compiler (Type | Version: 8.0.1-rc2 checker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): NB: the `isTcTyVar` could conceivably cause extra ASSERT failures when DEBUG is on. I didn't see any, but keep your eyes open. However, ignoring them (ie no `-DDEBUG`) is simply what happens today and is fine. So things will not be worse. Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11608#comment:11 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler