#16076: Internal compiler error when instance uses FFI function and defining other instance of the same class through Template Haskell -------------------------------------+------------------------------------- Reporter: radekchannable | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.4.4 Resolution: | Keywords: Operating System: Linux | 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 radekchannable): But there is no reason for it to call the showFoo function; its result is not used in any Template Haskell code. This would be a rather arbitrary limitation; not being able to define instances using Template Haskell just because an FFI function was declared in some module somewhere. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16076#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler