To answer your question specifically, you have this chunk of code:

die "Some error in search_for_username_and_no_of_questions" if (search
+_for_username_and_no_of_questions() == -1);
die "Some error in end_block" if (end_block() == -1);
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Meaning you exit the program if <deepbreath>search_for_username_and_no_of_questions</deepbreath> returns a -1. Well that's the only thing it will ever return (besides a $@) so there won't ever be a case where the end_block is called.