Symfony version(s) affected: 4.1.5

Description
The refactoring in commit 8805cfd by @fabpot broke the exit code handling for exceptions. Instead of calling the "exit" function with the correct error code the class simply returns the exit code from the run method. As there is no further code in the default "bin/console" script, php will end with exit code 0 indicating a success.

How to reproduce
Simply throw any exception within a symfony command and check the exit code of the console script.

Possible Solution
Remove the line "return $exitCode", which is line 163 in Console Application in version 4.1.5 (https://github.com/symfony/symfony/blob/master/src/Symfony/Component/Console/Application.php#L163).