"KeyError: 0" error

[afghanistan21]

When used with slyther and and a solidity version <0.5.x it gives the following error:

File "/home/ethsec/.local/lib/python3.6/site-packages/slither/main.py", line 741, in main_impl
) = process_all(filename, args, detector_classes, printer_classes)
File "/home/ethsec/.local/lib/python3.6/site-packages/slither/main.py", line 83, in process_all
) = process_single(compilation, args, detector_classes, printer_classes)
File "/home/ethsec/.local/lib/python3.6/site-packages/slither/main.py", line 68, in process_single
return _process(slither, detector_classes, printer_classes)
File "/home/ethsec/.local/lib/python3.6/site-packages/slither/main.py", line 115, in _process
printer_results = slither.run_printers()
File "/home/ethsec/.local/lib/python3.6/site-packages/slither/slither.py", line 195, in run_printers
return [p.output(self._crytic_compile.target).data for p in self._printers]
File "/home/ethsec/.local/lib/python3.6/site-packages/slither/slither.py", line 195, in
return [p.output(self._crytic_compile.target).data for p in self._printers]
File "/home/ethsec/.local/lib/python3.6/site-packages/slither/printers/summary/evm.py", line 79, in output
evm_info = _extract_evm_info(self.slither)
File "/home/ethsec/.local/lib/python3.6/site-packages/slither/printers/summary/evm.py", line 32, in _extract_evm_info
cfg = CFG(contract_bytecode_runtime)
File "/usr/local/lib/python3.6/dist-packages/evm_cfg_builder/cfg/init.py", line 96, in init
self.create_functions()
File "/usr/local/lib/python3.6/dist-packages/evm_cfg_builder/cfg/init.py", line 183, in create_functions
self.compute_functions(self._basic_blocks[0], True)
KeyError: 0
None

Traceback (most recent call last):
File "/home/ethsec/.local/lib/python3.6/site-packages/slither/main.py", line 741, in main_impl
) = process_all(filename, args, detector_classes, printer_classes)
File "/home/ethsec/.local/lib/python3.6/site-packages/slither/main.py", line 83, in process_all
) = process_single(compilation, args, detector_classes, printer_classes)
File "/home/ethsec/.local/lib/python3.6/site-packages/slither/main.py", line 68, in process_single
return _process(slither, detector_classes, printer_classes)
File "/home/ethsec/.local/lib/python3.6/site-packages/slither/main.py", line 115, in _process
printer_results = slither.run_printers()
File "/home/ethsec/.local/lib/python3.6/site-packages/slither/slither.py", line 195, in run_printers
return [p.output(self._crytic_compile.target).data for p in self._printers]
File "/home/ethsec/.local/lib/python3.6/site-packages/slither/slither.py", line 195, in
return [p.output(self._crytic_compile.target).data for p in self._printers]
File "/home/ethsec/.local/lib/python3.6/site-packages/slither/printers/summary/evm.py", line 79, in output
evm_info = _extract_evm_info(self.slither)
File "/home/ethsec/.local/lib/python3.6/site-packages/slither/printers/summary/evm.py", line 32, in _extract_evm_info
cfg = CFG(contract_bytecode_runtime)
File "/usr/local/lib/python3.6/dist-packages/evm_cfg_builder/cfg/init.py", line 96, in init
self.create_functions()
File "/usr/local/lib/python3.6/dist-packages/evm_cfg_builder/cfg/init.py", line 183, in create_functions
self.compute_functions(self._basic_blocks[0], True)
KeyError: 0