#15175: ghc: panic! (the 'impossible' happened) -------------------------------------+------------------------------------- Reporter: MADjestic | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.0.2 Keywords: | Operating System: Linux Architecture: x86_64 | Type of failure: Compile-time (amd64) | crash or panic Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- Hey guys, When following the installation instructions for [https://github.com /ivanperez-keera/SpaceInvaders/ SpaceInvaders], I am getting the following error: {{{ [13 of 14] Compiling ObjectBehavior ( src/ObjectBehavior.hs, dist/dist- sandbox-5c221c1a/build/spaceInvaders/spaceInvaders-tmp/ObjectBehavior.o ) src/ObjectBehavior.hs:20:1: warning: [-Wunused-imports] The qualified import of ‘System.Random’ is redundant except perhaps to import instances from ‘System.Random’ To import instances alone, use: import System.Random() src/ObjectBehavior.hs:23:1: warning: [-Wunused-imports] The import of ‘FRP.Yampa.Integration’ is redundant except perhaps to import instances from ‘FRP.Yampa.Integration’ To import instances alone, use: import FRP.Yampa.Integration() src/ObjectBehavior.hs:24:1: warning: [-Wunused-imports] The import of ‘FRP.Yampa.Utilities’ is redundant except perhaps to import instances from ‘FRP.Yampa.Utilities’ To import instances alone, use: import FRP.Yampa.Utilities() src/ObjectBehavior.hs:256:1: warning: [-Wmissing-signatures] Top-level binding with no type signature: gravity :: Vector2 Velocity src/ObjectBehavior.hs:263:1: warning: [-Wmissing-signatures] Top-level binding with no type signature: limit :: Ord a => a -> a -> a -> a src/ObjectBehavior.hs:265:1: warning: [-Wmissing-signatures] Top-level binding with no type signature: symLimit :: (Num t, Ord t) => t -> t -> t ghc: panic! (the 'impossible' happened) (GHC version 8.0.2 for x86_64-unknown-linux): StgCmmEnv: variable not found $dNum_aoyU local binds for: $s$fVectorSpaceVector2a_$s$fVectorSpaceVector2a_$cnorm $s$fVectorSpaceVector2a_$s$fVectorSpaceVector2a_$cp1VectorSpace $sintegralAux_rsVn integralAux_rsVo lvl_rsVp lvl1_rsVq lvl2_rsVr lvl3_rsVs $sintegralAux1_rsVt integralAux1_rsVu $sintegralAux2_rsVv integralAux2_rsVw lvl4_rsVx lvl5_rsVy lvl6_rsVz lvl7_rsVA lvl8_rsVB lvl9_rsVC lvl10_rsVD lvl11_rsVE lvl13_rsVM lvl14_rsVN lvl15_rsVO lvl16_rsVP lvl17_rsVQ lvl18_rsVR lvl19_rsVS lvl20_rsVT lvl21_rsVU lvl22_rsVV lvl23_rsVW lvl24_rsVX lvl25_rsVY dt_rsVZ dt1_rsW0 sf_rsW1 dt2_rsW2 lvl26_rsW3 lvl27_rsW4 lvl28_rsW5 lvl29_rsW6 lvl30_rsW7 lvl31_rsW8 lvl32_rsW9 lvl33_rsWa lvl34_rsWb lvl35_rsWc lvl36_rsWd lvl37_rsWe lvl38_rsWf lvl39_rsWg lvl40_rsWh lvl41_rsWi lvl42_rsWj lvl43_rsWk lvl44_rsWl lvl45_rsWm lvl46_rsWn lvl47_rsWo lvl48_rsWp lvl49_rsWq lvl50_rsWr lvl51_rsWs lvl52_rsWt lvl53_rsWu lvl54_rsWv lvl55_rsWw lvl56_rsWx lvl57_rsWy lvl58_rsWz lvl59_rsWA lvl60_rsWB lvl61_rsWC lvl62_rsWD lvl63_rsWE lvl64_rsWF $sintegralAux3_rsWG integralAux5_rsWH ll_rsWI Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} [https://github.com/ivanperez- keera/SpaceInvaders/issues/30#issuecomment-390638740 /original issue] {{{ $ ghc -V The Glorious Glasgow Haskell Compilation System, version 8.0.2 $ uname -a Linux nu 4.9.95-gentoo #1 SMP PREEMPT Wed May 9 22:32:30 CEST 2018 x86_64 Intel(R) Core(TM) i5-3230M CPU @ 2.60GHz GenuineIntel GNU/Linux }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15175 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler