#12522: GHC 8.0.1 hangs, looping forever in type-checker -------------------------------------+------------------------------------- Reporter: clinton | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Other | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by clinton): Oh yes, silly me. As you said, replacing the class with: {{{ f :: TF (x, a) -> () f _ = () }}} also illustrates the bug. This still causes the compiler to loop forever in GHC HEAD 21st September 2016 (8.1.20160921) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12522#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler