in reply to Re^2: hard-to-understand taint error
in thread hard-to-understand taint error

As you have found out yourself, you must take the captured data outside of the regex in order to untaint it.

CountZero

A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James

In Section Seekers of Perl Wisdom