#15005: GHC fails with “StgCmmEnv: variable not found” when trying to compile order-maintenance-0.2.1.0 -------------------------------------+------------------------------------- Reporter: jeltsch | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.4.3 Component: Compiler | Version: 8.4.2-rc1 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: Compile-time Unknown/Multiple | crash or panic Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- When trying to build `order-maintenance-0.2.1.0`, GHC 8.4.2-rc1 panics. Its output is as follows: {{{ [ 1 of 21] Compiling Data.Order.Algorithm.Raw ( src/library/Data/Order/Algorithm/Raw.hs, /home/wolfgang/Entwicklung/Haskell/order-maintenance-0.2.1.0/dist- newstyle/build/x86_64-linux/ghc-8.4.1.20180329/order- maintenance-0.2.1.0/build/Data/Order/Algorithm/Raw.o ) [ 2 of 21] Compiling Data.Order.Algorithm.Raw.DietzSleatorAmortizedLog ( src/library/Data/Order/Algorithm/Raw/DietzSleatorAmortizedLog.hs, /home/wolfgang/Entwicklung/Haskell/order-maintenance-0.2.1.0/dist- newstyle/build/x86_64-linux/ghc-8.4.1.20180329/order- maintenance-0.2.1.0/build/Data/Order/Algorithm/Raw/DietzSleatorAmortizedLog.o ) ghc: panic! (the 'impossible' happened) (GHC version 8.4.1.20180329 for x86_64-unknown-linux): StgCmmEnv: variable not found x_a46z local binds for: $tc'Label $tcLabel $tc'Cell $tcCell $trModule $tc'Cell1 $tc'Cell2 $tc'Cell3 $trModule1 $trModule2 $trModule3 $trModule4 $tc'Label1 $tc'Label2 $tc'Label3 $tcCell1 $tcCell2 $tcLabel1 $tcLabel2 lvl_r4UD lvl1_r4UE lvl2_r4UF lvl3_r4UG lvl4_r4UH lvl5_r4UI lvl6_r4UJ lvl7_r4UK lvl8_r4UL lvl9_r4UM lvl10_r4UN lvl11_r4UO lvl12_r4UP lvl13_r4UQ lvl14_r4UR lvl15_r4US lvl16_r4UT lvl17_r4UU $krep_r4UV $krep1_r4UW $krep2_r4UX lvl18_r4UY $krep3_r4UZ $krep4_r4V0 $krep5_r4V1 $krep6_r4V2 $krep7_r4V3 $krep8_r4V4 $krep9_r4V5 lvl19_r4V6 lvl20_r4V7 lvl21_r4V8 lvl22_r4V9 lvl23_r4Va lvl24_r4Vb lvl25_r4Vc ww_s4W2 lwild_s4W3 lwild1_s4W4 noOfLabels_s4W5 noOfLabels1_s4W6 labelMask_s4W7 $wnewAfterCell_s4Wa ww1_s4Wb ipv1_s4Wf wild_s4Wg ds_s4Wh ds2_s4Wi ww2_s4Wk ww3_s4Wl ww4_s4Wn ww5_s4Wo wild1_s4Wq smallGap_s4Wr wild2_s4Ws Call stack: CallStack (from HasCallStack): callStackDoc, called at compiler/utils/Outputable.hs:1150:37 in ghc:Outputable pprPanic, called at compiler/codeGen/StgCmmEnv.hs:149:9 in ghc:StgCmmEnv Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} The same problem exists with GHC 8.4.1. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15005 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler