Issue #4: Verify before coping

Signed-off-by: Matheus Horstmann <mch15@inf.ufpr.br>
3 jobs for 4-bug-arrumar-preinst in 8 minutes and 21 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Lint
passed lint_shell #40610
debian-packaging

00:00:27

 
  Build
passed build #40611
debian-packaging

00:00:33

 
  Test
passed test #40612
ubuntu regular

00:07:21