[0]  # perl  test_range
1 aaa
2 aaa
3 AAAAAA
========= Start of the fragment detected at 3
Still true at 3
4 ccc
Still true at 4
5 ddd
Still true at 5
6 BBBBBB
Still true at 6
7 111
8 222
9 333
10 CCCCCC
11 444
12 555
13 666
14 DDDDDD
15 777
16 888
17 999
========= End of the fragment detected at 6.