In some cases the @ unlink php function breaks the execution of the code instead of returning false.
I am using php 7.2

When was trying to use the console, suddendly I start getting errors about the imposibily to @ unlink a certain file under the cache folder because it does not exists.

So what I did was to modify these lines of code in order to use the console

Kernel.php

instead of @Unlink(dirname($dir.$file).'.legacy');
line: 703
if (file_exists(dirname($dir.$file).'.legacy')) @Unlink(dirname($dir.$file).'.legacy');

Filesystem.php 184
elseif (file_exists($file) && !@Unlink($file) )

Checking the file befor unlink did the trick in both cases