>By default syscalls that fail set $? (which can be ignored and usually is) and don't die, and making them die breaks a lot of library code that only "works" be

>By default syscalls that fail set $? (which can be ignored and usually is) and don't die, and making them die breaks a lot of library code that only "works" because it ignores errors The solution to this is to use the autodie pragma (https://metacpan.org/pod/autodie https://metacpan.org/pod/autodie) which has been part of the Perl core since 5.10.1 (released in Aug 2009): use 5.016; use warnings; use autodie; open my $fh, '<', "somefile"; # this file doesn't exist So above will now produce a runtime error - Can't open 'somefile' for reading: 'No such file or directory' at... And autodie is lexically scoped so it won't break any library code.