--- a/hgext/convert/common.py	Tue Sep 25 22:11:17 2018 -0400
+++ b/hgext/convert/common.py	Tue Sep 25 23:25:36 2018 -0400
@@ -402,7 +402,7 @@
 
     def _run(self, cmd, *args, **kwargs):
         def popen(cmdline):
-            p = subprocess.Popen(pycompat.rapply(procutil.tonativestr, cmdline),
+            p = subprocess.Popen(procutil.tonativestr(cmdline),
                                  shell=True, bufsize=-1,
                                  close_fds=procutil.closefds,
                                  stdout=subprocess.PIPE)