0s Loop PID is 8353
0s Start of loop 0
0s Hello, from loop 0 (arg 0) in PID 8353!
2s Good bye, from PID 8353!
2s End of loop 0
2s Start of loop 1
2s Hello, from loop 1 (arg 1) in PID 8353!
4s Good bye, from PID 8353!
4s End of loop 1
4s Subprocess error: Can't locate object method "Return value of 0" via package "Mojo::IOLoop::Subprocess" at /opt/perl5.28/lib/site_perl/5.28.1/Mojo/IOLoop/Subprocess.pm line 53.
4s Subprocess error: Can't locate object method "Return value of 1" via package "Mojo::IOLoop::Subprocess" at /opt/perl5.28/lib/site_perl/5.28.1/Mojo/IOLoop/Subprocess.pm line 53.