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[7 of 8] Compiling Cardano.Config.Protocol [Codec.CBOR.Read changed]
ghc: panic! (the 'impossible' happened)
  (GHC version 8.6.5 for x86_64-unknown-linux):
        StgCmmEnv: variable not found
  ds_s18oj
  local binds for:
  $fExceptionConfigurationError
  $fExceptionConfigurationError1
  $fExceptionConfigurationError_$ctoException
  $fExceptionConfigurationError_$cfromException
  $fShowProtocolInstantiationError
  $fShowProtocolInstantiationError_$cshowsPrec
  $fShowProtocolInstantiationError_$cshow
  $fShowProtocolInstantiationError_$cshowList
  $fShowProtocolInstantiationError1
  $fShowProtocolInstantiationError2
  $fShowProtocolInstantiationError10
  $fShowProtocolInstantiationError11
  $fShowProtocolInstantiationError12
  $fShowProtocolInstantiationError13
  $fShowProtocolInstantiationError14
  $fShowProtocolInstantiationError15
  $fShowProtocolInstantiationError16
  $fShowProtocolInstantiationError3
  $fShowProtocolInstantiationError4
  $fShowProtocolInstantiationError5
  $fShowProtocolInstantiationError6
  $fShowProtocolInstantiationError7
  $fShowProtocolInstantiationError8
  $fShowProtocolInstantiationError9
  $s$fApplyTxSimpleBlock'10
  $s$fApplyTxSimpleBlock'9
  $tc'ByronLegacyProtocolNotImplemented
  $trModule
  $tc'ByronLegacyProtocolNotImplemented2
  $tc'ByronLegacyProtocolNotImplemented1
  $tc'ByronLegacyProtocolNotImplemented3
  $tc'CanonicalDecodeFailure
  $tc'CanonicalDecodeFailure2
  $tc'CanonicalDecodeFailure1
  $tc'CanonicalDecodeFailure3
  $tc'DelegationCertificateFilepathNotSpecified
  $tc'DelegationCertificateFilepathNotSpecified1
  $tc'DelegationCertificateFilepathNotSpecified2
  $tc'LedgerConfigError
  $tc'LedgerConfigError2
  $tc'LedgerConfigError1
  $tc'LedgerConfigError3
  $tc'MissingCoreNodeId
  $tc'MissingCoreNodeId1
  $tc'MissingCoreNodeId2
  $tc'MissingNumCoreNodes
  $tc'MissingNumCoreNodes1
  $tc'MissingNumCoreNodes2
  $tc'PbftError
  $tc'PbftError2
  $tc'PbftError1
  $tc'PbftError3
  $tc'SigningKeyDeserialiseFailure
  $tc'SigningKeyDeserialiseFailure2
  $tc'SigningKeyDeserialiseFailure1
  $tc'SigningKeyDeserialiseFailure3
  $tc'SigningKeyFilepathNotSpecified
  $tc'SigningKeyFilepathNotSpecified1
  $tc'SigningKeyFilepathNotSpecified2
  $tcProtocolInstantiationError
  $tcProtocolInstantiationError1
  $tcProtocolInstantiationError2
  $tcSomeProtocol
  $tcSomeProtocol1
  $tcSomeProtocol2
  $trModule3
  $trModule1
  $trModule2
  $trModule4
  mockSlotLengths_rRCC
  lvl_r18fj
  lvl1_r18fk
  lvl2_r18fl
  lvl3_r18fm
  lvl4_r18fn
  lvl5_r18fo
  lvl6_r18fp
  lvl7_r18fq
  mockSecurityParam_r18fr
  $krep_r18fs
  $krep1_r18ft
  $krep2_r18fu
  $krep3_r18fv
  lvl8_r18fw
  mockSlotLength_r18fx
  $dFromJSON_r18fy
  lvl9_r18fz
  lvl10_r18fA
  ww3_r18fB
  lvl11_r18fC
  lvl12_r18fD
  poly_d_r18fE
  k_s18oh
  wild_s18oi
  sat_s18on
  Call stack:
      CallStack (from HasCallStack):
        callStackDoc, called at compiler/utils/Outputable.hs:1160:37 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


--  While building package cardano-config-0.1.0.0 using:
      /home/jordan/.stack/setup-exe-cache/x86_64-linux/Cabal-simple_mPHDZzAJ_2.4.0.1_ghc-8.6.5 --builddir=.stack-work/dist/x86_64-linux/Cabal-2.4.0.1 build lib:cardano-config --ghc-options " -fdiagnostics-color=always"
    Process exited with code: ExitFailure 1