> ./stderr_test.pl
Use of uninitialized value in printf at ./stderr_test.pl line 11.
element 0 of array =
Use of uninitialized value in printf at ./stderr_test.pl line 11.
element 1 of array =
Use of uninitialized value in printf at ./stderr_test.pl line 11.
element 2 of array =
Use of uninitialized value in printf at ./stderr_test.pl line 11.
element 3 of array =
Use of uninitialized value in printf at ./stderr_test.pl line 11.
element 4 of array =
...