#14880: GHC panic: updateRole -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: goldfire Type: bug | Status: new Priority: normal | Milestone: 8.8.1 Component: Compiler (Type | Version: 8.2.2 checker) | Resolution: | Keywords: TypeInType Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: #15076 | Differential Rev(s): Phab:D4769 Wiki Page: | -------------------------------------+------------------------------------- Comment (by goldfire): The next step would appear to be to duplicate the `FV` module (with identical function structure) but to drop the lists. Then use the new `NonDetFV` instead of `FV`. I would be shocked if the allocations go anywhere but down. Then, we'll have a new conundrum: why is `VarSet` slower than this `NonDetFV`? But let's not figure that out until we've made the observation that it is indeed slower. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14880#comment:80 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler