#11819: Full validation issues for 8.0.1 -------------------------------------+------------------------------------- Reporter: bgamari | Owner: Type: bug | Status: new Priority: high | Milestone: 8.0.2 Component: Compiler | Version: 8.0.1-rc3 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 niteria): 7afb7adf45216701e4f645676ecc0668f64b424d fixes the in-scope set failure on `PatBind`: {{{ ghc-stage2: panic! (the 'impossible' happened) (GHC version 8.0.1.20160916 for x86_64-unknown-linux): ASSERT failed! CallStack (from HasCallStack): assertPprPanic, called at compiler/types/TyCoRep.hs:2008:56 in ghc:TyCoRep checkValidSubst, called at compiler/types/TyCoRep.hs:2044:17 in ghc:TyCoRep substTy, called at compiler/types/TyCoRep.hs:1986:3 in ghc:TyCoRep in_scope InScope [apd :-> a_apd[sk], apm :-> a_apm[tau:3], apn :-> t_apn[tau:3]] tenv [ap4 :-> t_apn[tau:3], apd :-> a_apm[tau:3]] tenvFVs [ap5 :-> t_ap5[tau:3], apm :-> a_apm[tau:3], apn :-> t_apn[tau:3]] cenv [] cenvFVs [] tys [a_apd[sk] -> a_apd[sk]] cos [] Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug *** unexpected failure for PatBind(normal) }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11819#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler