% perl -Mre=debug -e '/.../'
Freeing REx: `","'
Compiling REx `...'
size 4 Got 36 bytes for offset annotations.
first at 1
   1: REG_ANY(2)
   2: REG_ANY(3)
   3: REG_ANY(4)
   4: END(0)
minlen 3
Offsets: [4]
        1[1] 2[1] 3[1] 4[0]
Freeing REx: `"..."'