Files are not deleted when deleting many files, but VM thinks they are

[Marijn]

When we try delete many individual files in the VM on a shared folder, the files still exists but the VM reports them as not existant. The Symfony ​cache:clear command does this and fails because directory's can't be removed (the VM thinks they are empty but they are not).

Host: tested with Windows and OSX Guest: tested with Debian 8 64, Ubuntu 14.04 64, Ubuntu 14.04 32 Note: Debian 7 64 does not have this problem.

To reproduce:

• Clone ​https://github.com/marijnotte/file-delete-test
• Install Vagrant
• Do vagrant up in the project folder
• When provisioned login into the box (vagrant ssh)
• cd /vagrant
• php composer.phar install

Error message:

  [RuntimeException]                                                                                                                                                                                                                        
  Error Output:                                                                                                                                                                                                                             
                                                                                                                                                                                                                                            
  [Symfony\Component\Filesystem\Exception\IOException]                                                                                                                                                                                    
  Failed to remove directory "/vagrant/app/cache/pro~/doctrine".    

• cd /vagrant/app/cache/pro~/doctrine
• ls --> directory is empty
• Go to the same directory on your host --> directory is not empty

[Marijn]

The problem still exists in VirtualBox 5.2.8. Seems to be the same as #8761 and #15897