niecza errors

gistfile1.txt

siddhant@siddhant-laptop:~/niecza/run$ mono Niecza.exe 
[auto-compiling setting]
Unhandled exception: System.Exception: Unhandled nam operator command_qx
  at Niecza.CLRBackend.NamProcessor.Scan (System.Object node) [0x00000] in <filename unknown>:0 
  at Niecza.CLRBackend.NamProcessor.<NamProcessor>m__33 (Niecza.CLRBackend.NamProcessor th, System.Object[] zyg) [0x00000] in <filename unknown>:0 
  at Niecza.CLRBackend.NamProcessor.Scan (System.Object node) [0x00000] in <filename unknown>:0 
  at Niecza.CLRBackend.NamProcessor.<NamProcessor>m__20 (Niecza.CLRBackend.NamProcessor th, System.Object[] zyg) [0x00000] in <filename unknown>:0 
  at Niecza.CLRBackend.NamProcessor.Scan (System.Object node) [0x00000] in <filename unknown>:0 
  at Niecza.CLRBackend.NamProcessor+<MakeTotalHandler>c__AnonStorey1B.<>m__81 (Niecza.CLRBackend.NamProcessor th, System.Object[] zyg) [0x00000] in <filename unknown>:0 
  at Niecza.CLRBackend.NamProcessor.Scan (System.Object node) [0x00000] in <filename unknown>:0 
  at Niecza.CLRBackend.NamProcessor.<NamProcessor>m__20 (Niecza.CLRBackend.NamProcessor th, System.Object[] zyg) [0x00000] in <filename unknown>:0 
  at Niecza.CLRBackend.NamProcessor.Scan (System.Object node) [0x00000] in <filename unknown>:0 
  at Niecza.CLRBackend.NamProcessor.<NamProcessor>m__25 (Niecza.CLRBackend.NamProcessor th, System.Object[] z) [0x00000] in <filename unknown>:0 
  at Niecza.CLRBackend.NamProcessor.Scan (System.Object node) [0x00000] in <filename unknown>:0 
  at Niecza.CLRBackend.NamProcessor+<MakeTotalHandler>c__AnonStorey1B.<>m__81 (Niecza.CLRBackend.NamProcessor th, System.Object[] zyg) [0x00000] in <filename unknown>:0 
  at Niecza.CLRBackend.NamProcessor.Scan (System.Object node) [0x00000] in <filename unknown>:0 
  at Niecza.CLRBackend.NamProcessor+<MakeTotalHandler>c__AnonStorey1B.<>m__81 (Niecza.CLRBackend.NamProcessor th, System.Object[] zyg) [0x00000] in <filename unknown>:0 
  at Niecza.CLRBackend.NamProcessor.Scan (System.Object node) [0x00000] in <filename unknown>:0 
  at Niecza.CLRBackend.NamProcessor.MakeBody (System.Object b) [0x00000] in <filename unknown>:0 
  at Niecza.EmitUnit.CgSub (Niecza.SubInfo sub, Boolean erase) [0x00000] in <filename unknown>:0 
  at Niecza.RuntimeUnit.SaveSubs (Niecza.EmitUnit eu, Boolean erase) [0x00000] in <filename unknown>:0 
  at Niecza.RuntimeUnit.Save () [0x00000] in <filename unknown>:0 
  at Niecza.CLRBackend.DowncallReceiver.save_unit (System.Object[] args) [0x00000] in <filename unknown>:0 
  at Niecza.CLRBackend.DowncallReceiver.Call (System.Object[] args) [0x00000] in <filename unknown>:0 
  at Niecza.CLRBackend.DowncallReceiver.get_Item (System.Object i) [0x00000] in <filename unknown>:0 
  at /home/siddhant/niecza/src/NieczaFrontendSTD.pm6 line 273 (ANON @ 3) 
  at <unknown> line 0 (ExitRunloop @ 0) 
  at /home/siddhant/niecza/src/NieczaFrontendSTD.pm6 line 285 (NieczaFrontendSTD.parse @ 29) 
  at /home/siddhant/niecza/src/NieczaCompiler.pm6 line 33 (NieczaCompiler.compile @ 7) 
  at /home/siddhant/niecza/src/NieczaCompiler.pm6 line 49 (NieczaCompiler.compile_module @ 5) 
  at /home/siddhant/niecza/src/NieczaBackendDotnet.pm6 line 51 (ANON @ 34) 
  at /home/siddhant/niecza/src/NieczaBackendDotnet.pm6 line 59 (upcalled @ 4) 
  at <unknown> line 0 (ExitRunloop @ 0) 
  at /home/siddhant/niecza/src/NieczaBackendDotnet.pm6 line 0 (downcall @ 1) 
  at /home/siddhant/niecza/src/NieczaBackendDotnet.pm6 line 320 (Unit.FALLBACK @ 4) 
  at /home/siddhant/niecza/src/NieczaFrontendSTD.pm6 line 276 (NieczaFrontendSTD.parse @ 24) 
  at /home/siddhant/niecza/src/NieczaCompiler.pm6 line 33 (NieczaCompiler.compile @ 7) 
  at /home/siddhant/niecza/src/NieczaCompiler.pm6 line 64 (NieczaCompiler.compile_string @ 4) 
  at /home/siddhant/niecza/src/niecza line 439 (ANON @ 3) 
  at /home/siddhant/niecza/src/niecza line 453 (mainline @ 80) 
  at /home/siddhant/niecza/boot/lib/CORE.setting line 3606 (ANON @ 3) 
  at /home/siddhant/niecza/boot/lib/CORE.setting line 3607 (module-CORE @ 62) 
  at /home/siddhant/niecza/boot/lib/CORE.setting line 3607 (mainline @ 2) 
  at <unknown> line 0 (ExitRunloop @ 0)