#8714: ExistentialQuantification plus DeriveDataTypeable leads to core lint error -------------------------------------+---------------------------------- Reporter: CoreyOConnor | Owner: Type: bug | Status: new Priority: normal | Milestone: 7.8.1 Component: Compiler | Version: 7.8.1-rc1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: x86_64 (amd64) Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+---------------------------------- Comment (by CoreyOConnor): Thanks for the investigation! Is there a situation where this would cause a runtime crash? I ran across this investigating a crash in the yi editor application. According to valgrind the GC performs an invalid write: writes into a block not allocated AFAICT. If that is too much to conjecture then no worries. I'm still breaking the crash down into a smaller test case. This just fell out of that process. :-) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8714#comment:8 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler