What are the common pitfalls when using Perl's eval?

Question

What are the common pitfalls associated with Perl\'s eval, which might make you choose to use a module such as Try::Tiny?

Answer 1

Using eval on X11 function might still failed to keep alive.

The code is like

eval {    
    @win_arrays = GetWindowsFromPid($pid);
};

The script will be exited from

X Error of failed request: ...