After installing sudo package from proposed, there is no longer crash:
sudo ls
sudo: /etc/sudoers.d/mama is mode 0644, should be 0440
>>> /etc/sudoers.d/README: /etc/sudoers.d/mama near line 18 <<<
sudo: parse error in /etc/sudoers.d/README near line 18
sudo: no valid sudoers sources found, quitting
After installing sudo package from proposed, there is no longer crash:
sudo ls d/README: /etc/sudoers.d/mama near line 18 <<< d/README near line 18
sudo: /etc/sudoers.d/mama is mode 0644, should be 0440
>>> /etc/sudoers.
sudo: parse error in /etc/sudoers.
sudo: no valid sudoers sources found, quitting
Verified.