myprogram is already executable.
=== shell_exec output ===
/tmp/par-6e6176616465726d61/cache-db580b5ee21ebc265bc0159dbaff3d515e00d796/myprogram: exec of /tmp/par-6e6176616465726d61/cache-db580b5ee21ebc265bc0159dbaff3d515e00d796/myprogram (custom Perl interpreter) failed (errno=13)

=== exec output ===
Command failed with status 255
Exit status: 255

=== system output ===
/tmp/par-6e6176616465726d61/cache-db580b5ee21ebc265bc0159dbaff3d515e00d796/myprogram: exec of /tmp/par-6e6176616465726d61/cache-db580b5ee21ebc265bc0159dbaff3d515e00d796/myprogram (custom Perl interpreter) failed (errno=13)

Exit status: 255

=== passthru output ===
/tmp/par-6e6176616465726d61/cache-db580b5ee21ebc265bc0159dbaff3d515e00d796/myprogram: exec of /tmp/par-6e6176616465726d61/cache-db580b5ee21ebc265bc0159dbaff3d515e00d796/myprogram (custom Perl interpreter) failed (errno=13)

Exit status: 255

=== PHP Configuration ===
No disabled functions listed in disable_functions.