#14884: Type holes cause assertion failure in ghc-stage2 compiler during type checking -------------------------------------+------------------------------------- Reporter: sighingnow | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: checker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): I've seen this before. It arises during error reporting, when the (now quite elaborate) `TcErrors.validSubstitutions` code invokes the constraint solver. To avoid the assertion error we need to set the level correctly, and we aren't doing that yet. It's unsatisfactory, but I think harmless. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14884#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler