Unhandled exception (9580c84e)

Zeus version:
1.5.2.f6a3ad

Firefox version:
(57, 0)

Geckodriver version:
geckodriver-v0.19.0-linux64.tar.gz

Error info:

  File "zeus.py", line 341, in <module>
    len(open(opt.fileToEnumerate).readlines())
IOError: [Errno 21] Is a directory: '/root/zeus-scanner/log/url-log/'

Running details:
Linux-4.15.0-46-generic-x86_64-with-Ubuntu-18.04-bionic

Commands used:
zeus.py -f /root/zeus-scanner/log/url-log/

Log file info:

2019-03-08 04:41:41,766;zeus-log;INFO;running enumeration on given file '/root/zeus-scanner/log/url-log/'
2019-03-08 04:41:41,767;zeus-log;ERROR;Zeus has hit an unexpected error and cannot continue, error code '[Errno 21] Is a directory: '/root/zeus-scanner/log/url-log/''
Traceback (most recent call last):
  File "zeus.py", line 341, in <module>
    len(open(opt.fileToEnumerate).readlines())
IOError: [Errno 21] Is a directory: '/root/zeus-scanner/log/url-log/'

2019-03-08 04:41:46,021;zeus-log;INFO;Zeus got an unexpected error and will automatically create an issue for this error, please wait
2019-03-08 04:41:46,021;zeus-log;INFO;getting authorization
2019-03-08 04:41:46,022;zeus-log;INFO;extracting traceback from log file
2019-03-08 04:41:46,022;zeus-log;INFO;attempting to get firefox browser version

Start at zeus.py line 341 and reproduce the command using a directory path such as /root/zeus-scanner/log/url-log/. Check how the -f input is handled and define completion as avoiding the unhandled IOError while reporting the invalid input clearly.