#13429: Optimizer produces Core with an infinite <<loop>> -------------------------------------+------------------------------------- Reporter: lehins | Owner: (none) Type: bug | Status: new Priority: high | Milestone: 7.10.4 Component: Compiler | Version: 8.0.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Runtime crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by dfeuer): Simon, I can't speak for absolute HEAD, but I tried it with a very recent build and the bug happens there. I tried modifying the code to use type families and equality constraints to eliminate `FunctionalDependencies`, `FlexibleContexts`, and `UndecidableInstances`, but the same bug shows up. I've not yet been able to make the bug happen using single-parameter type classes, but that certainly doesn't mean it's impossible. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13429#comment:18 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler