#11812: Template Haskell can induce non-unique Uniques -------------------------------------+------------------------------------- Reporter: goldfire | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Template Haskell | Version: 8.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by RyanGlScott): To make things worse, this program now panics on GHC 8.2.1: {{{ $ /opt/ghc/8.2.1/bin/ghc Bug.hs [1 of 1] Compiling Bug ( Bug.hs, Bug.o ) ghc: panic! (the 'impossible' happened) (GHC version 8.2.1 for x86_64-unknown-linux): expectJust zonkTcTyVarToVar CallStack (from HasCallStack): error, called at compiler/utils/Maybes.hs:53:27 in ghc:Maybes expectJust, called at compiler/typecheck/TcType.hs:1583:21 in ghc:TcType }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11812#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler