Ranger Crashes on with 'not finding file or directory'

[Dovermore]

Runtime Environment

• Operating system and version: Raspbian GNU/Linux 10 (buster)
• Terminal emulator and version: Alacritty
• Python version: python3.7.3
• Ranger version/commit: 1.9.3
• Locale: Australia

Current Behavior

Running pypl ranger-fm give the following error:

ranger version: ranger 1.9.3
Python version: 3.7.3 (default, Apr  3 2019, 05:39:12) [GCC 8.2.0]
Locale: en_US.UTF-8

Traceback (most recent call last):
  File "/home/pi/.local/lib/python3.7/site-packages/ranger/core/main.py", line 171, in main
    fm.initialize()
  File "/home/pi/.local/lib/python3.7/site-packages/ranger/core/fm.py", line 132, in initialize
    self.ui.initialize()
  File "/home/pi/.local/lib/python3.7/site-packages/ranger/gui/ui.py", line 127, in initialize
    self.handle_multiplexer()
  File "/home/pi/.local/lib/python3.7/site-packages/ranger/gui/ui.py", line 500, in handle_multiplexer
    ['screen', '-Q', 'title']).strip()
  File "/home/pi/.local/lib/python3.7/site-packages/ranger/ext/spawn.py", line 35, in check_output
    process = Popen(popenargs, stderr=fd_devnull, **kwargs)
  File "/usr/lib/python3.7/subprocess.py", line 775, in __init__
    restore_signals, start_new_session)
  File "/usr/lib/python3.7/subprocess.py", line 1522, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'screen': 'screen'

ranger crashed. Please report this traceback at:
https://github.com/ranger/ranger/issu

Cloning then run ranger.py give the following behavior (python2)

ranger version: ranger-master v1.9.3-1-g3965e3ee
Python version: 2.7.16 (default, Apr  6 2019, 01:42:57) [GCC 8.2.0]
Locale: None.None

Traceback (most recent call last):
  File "/home/pi/scratch/ranger/ranger/core/main.py", line 171, in main
    fm.initialize()
  File "/home/pi/scratch/ranger/ranger/core/fm.py", line 132, in initialize
    self.ui.initialize()
  File "/home/pi/scratch/ranger/ranger/gui/ui.py", line 127, in initialize
    self.handle_multiplexer()
  File "/home/pi/scratch/ranger/ranger/gui/ui.py", line 500, in handle_multiplexer
    ['screen', '-Q', 'title']).strip()
  File "/home/pi/scratch/ranger/ranger/ext/spawn.py", line 35, in check_output
    process = Popen(popenargs, stderr=fd_devnull, **kwargs)
  File "/usr/lib/python2.7/subprocess.py", line 394, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1047, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

Cloning master and run with python 3 yield

ranger version: ranger-master v1.9.3-1-g3965e3ee
Python version: 3.7.3 (default, Apr  3 2019, 05:39:12) [GCC 8.2.0]
Locale: en_US.UTF-8

Traceback (most recent call last):
  File "/home/pi/scratch/ranger/ranger/core/main.py", line 171, in main
    fm.initialize()
  File "/home/pi/scratch/ranger/ranger/core/fm.py", line 132, in initialize
    self.ui.initialize()
  File "/home/pi/scratch/ranger/ranger/gui/ui.py", line 127, in initialize
    self.handle_multiplexer()
  File "/home/pi/scratch/ranger/ranger/gui/ui.py", line 500, in handle_multiplexer
    ['screen', '-Q', 'title']).strip()
  File "/home/pi/scratch/ranger/ranger/ext/spawn.py", line 35, in check_output
    process = Popen(popenargs, stderr=fd_devnull, **kwargs)
  File "/usr/lib/python3.7/subprocess.py", line 775, in __init__
    restore_signals, start_new_session)
  File "/usr/lib/python3.7/subprocess.py", line 1522, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'screen': 'screen'

ranger crashed. Please report this traceback at:
https://github.com/ranger/ranger/issues

Steps to reproduce

1. Install ranger via builtin pip3 in raspberry pi 4
2. Run ranger.

Traceback

Shown above already.

[toonn]

Are you simply running ranger? Or are you passing any arguments? Are you running ranger inside screen?

[wizzup]

Might be something related to Python, I've got the same issue on NixOS after system update.

I am using termite

[wizzup@ ~]$ pwd
/home/wizzup
[wizzup@ ~]$ ranger 
ranger version: ranger 1.9.3
Python version: 3.7.6 (default, Dec 18 2019, 19:23:55) [GCC 9.2.0]
Locale: en_US.UTF-8

Traceback (most recent call last):
  File "/nix/store/qadvz4213ly5s78xdyqsy6d59pzngnjc-ranger-1.9.3/lib/python3.7/site-packages/ranger/core/main.py", line 171, in main
    fm.initialize()
  File "/nix/store/qadvz4213ly5s78xdyqsy6d59pzngnjc-ranger-1.9.3/lib/python3.7/site-packages/ranger/core/fm.py", line 132, in initialize
    self.ui.initialize()
  File "/nix/store/qadvz4213ly5s78xdyqsy6d59pzngnjc-ranger-1.9.3/lib/python3.7/site-packages/ranger/gui/ui.py", line 127, in initialize
    self.handle_multiplexer()
  File "/nix/store/qadvz4213ly5s78xdyqsy6d59pzngnjc-ranger-1.9.3/lib/python3.7/site-packages/ranger/gui/ui.py", line 500, in handle_multiplexer
    ['screen', '-Q', 'title']).strip()
  File "/nix/store/qadvz4213ly5s78xdyqsy6d59pzngnjc-ranger-1.9.3/lib/python3.7/site-packages/ranger/ext/spawn.py", line 35, in check_output
    process = Popen(popenargs, stderr=fd_devnull, **kwargs)
  File "/nix/store/bzvpdbzdy3a1qba8f9ynrzyz811c10pp-python3-3.7.6/lib/python3.7/subprocess.py", line 800, in __init__
    restore_signals, start_new_session)
  File "/nix/store/bzvpdbzdy3a1qba8f9ynrzyz811c10pp-python3-3.7.6/lib/python3.7/subprocess.py", line 1551, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'screen': 'screen'

ranger crashed. Please report this traceback at:
https://github.com/ranger/ranger/issues

[Dovermore]

Are you simply running ranger? Or are you passing any arguments? Are you running ranger inside screen?

Hi, I am simply running ranger without any argument from a bash console. I am not too sure what do you mean by running it inside screen, but my terminal emulator is alacrity. I connected to the console using SSH and installed ranger via pip and from the master branch.

[wizzup]

Found the problem

[wizzup@ ~]$ echo $TERM
screen-256color

It is $TERM, using xterm wont' crash ranger

[wizzup@ ~]$ TERM=xterm ranger

[Dovermore]

Issue solved, closing now. Tmux with screen is causing the problem.

[toonn]

Ranger shouldn't crash just because your TERM=screen*.