Please report this error on https://github.com/sashs/ropper

[zhefox]

pwndbg> ropper
Saved corefile /tmp/tmpozwijdmm
[INFO] Load gadgets for section: LOAD
[ERROR] Please report this error on https://github.com/sashs/ropper
[ERROR] Traceback (most recent call last):
File "/home/zhefox/.local/lib/python2.7/site-packages/ropper/console.py", line 62, in cmd
func(self, text)
File "/home/zhefox/.local/lib/python2.7/site-packages/ropper/console.py", line 571, in __handleOptions
self.__loadGadgetsForAllFiles()
File "/home/zhefox/.local/lib/python2.7/site-packages/ropper/console.py", line 299, in __loadGadgetsForAllFiles
self.__rs.loadGadgetsFor()
File "/home/zhefox/.local/lib/python2.7/site-packages/ropper/service.py", line 648, in loadGadgetsFor
load_gadgets(fc)
File "/home/zhefox/.local/lib/python2.7/site-packages/ropper/service.py", line 637, in load_gadgets
f.allGadgets = self.__ropper.searchGadgets(f.loader, instructionCount=self.options.inst_count, gtype=gtype,multiprocessing=self.options.multiprocessing)
File "/home/zhefox/.local/lib/python2.7/site-packages/ropper/rop.py", line 289, in searchGadgets
if mp.get_start_method() != 'fork':
AttributeError: 'module' object has no attribute 'get_start_method'