$ ./3.sscce.pl 
1..1
number is 1
number is 8
["abcdef", "abcdef", "abcde ", " bcdef"]
inside first anonymous block
index 1 out of range at ./3.sscce.pl line 34.
# Looks like your test exited with 255 before it could output anything.
$ cat 3.sscce.pl