New comment by rapha8l on void-packages repository

https://github.com/void-linux/void-packages/issues/16100#issuecomment-549302240

Comment:
seems like this is causing the crash : 

mailboxes ! + `\                                                                                                                                                                                       
for file in ~/Maildir/.*; do \                                                                                                                                                                         
     box=$(basename "$file"); \                                                                                                                                                                        
     if [ ! "$box" = '.' -a ! "$box" = '..' -a ! "$box" = '.customflags' \                                                                                                                             
      -a ! "$box" = '.subscriptions' ]; then \                                                                                                                                                         
      echo -n "\"+$box\" "; \                                                                                                                                                                          
      fi; \                                                                                                                                                                                            
done`