Hello from thread 0.
Item 400.xml
thread failed to start: lock can only be used on shared values at foo.pl line 1036.
Hello from thread 1.
Item 1159.xml
thread failed to start: lock can only be used on shared values at foo.pl line 1036.
Hello from thread 2.
Item 1175.xml
thread failed to start: lock can only be used on shared values at foo.pl line 1036.