Function execautofn_basic 

pub fn execautofn_basic(state: &mut estate, _do_exec: i32) -> i32

Port of execautofn_basic(Estate state, UNUSED(int do_exec)) from Src/exec.c:5608-5630. Run a pre-loaded autoload function body via execode, snapshotting scriptname/scriptfilename around the call so %N / %x reflect the autoload target during execution.