#10946: Typed hole inside typed Template Haskell bracket causes panic -------------------------------------+------------------------------------- Reporter: jstolarek | Owner: (none) Type: bug | Status: new Priority: high | Milestone: 8.4.1 Component: Template Haskell | Version: 7.10.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash | Test Case: th/T10946 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Tritlo): RyanGlScott: It seems like what's happening is that since the variable has no constraints on it at all, then it's matching everything in scope (including everything in scope in TemplateHaskell), and then doing the subsumption graph sorting on that, which takes a very long time. I'll give it some thought, but it seems like the right way to go would be to not try to find valid substitutions for this too general case. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10946#comment:12 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler