#13466: Ghci panics with type applications to unknown functions -------------------------------------+------------------------------------- Reporter: aspiwack | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: GHCi | Version: 8.0.2 Resolution: | Keywords: | TypeApplications Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by RyanGlScott): * keywords: => TypeApplications Comment: Actually, it's not #13106 for once! I can reproduce this on GHC HEAD as well: {{{ GHCi, version 8.3.20170322: http://www.haskell.org/ghc/ :? for help Loaded GHCi configuration from /home/rgscott/.ghci λ> :set -XTypeApplications λ> :t nonexistant @[] ghc-stage2: panic! (the 'impossible' happened) (GHC version 8.3.20170322 for x86_64-unknown-linux): initTc: unsolved constraints WC {wc_insol = [WD] nonexistant_a1tE {0}:: t1_a1tD[tau:2] (CHoleCan: nonexistant)} Call stack: CallStack (from HasCallStack): prettyCurrentCallStack, called at compiler/utils/Outputable.hs:1191:58 in ghc:Outputable callStackDoc, called at compiler/utils/Outputable.hs:1195:37 in ghc:Outputable pprPanic, called at compiler/typecheck/TcRnMonad.hs:343:17 in ghc:TcRnMonad }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13466#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler