2 <ab> <c>                | 12:          REG_ANY(14)
   3 <abc> <>                | 14:          WHILEM[1/1](0)
                                            whilem: matched 2 out of 1..32767
   3 <abc> <>                |  3:            BRANCH(11)
   3 <abc> <>                |  4:              OPEN1(6)
   3 <abc> <>                |  6:              REG_ANY(7)
                                                failed...
   3 <abc> <>                | 11:            BRANCH(13)
   3 <abc> <>                | 12:              REG_ANY(14)
                                                failed...
                                              BRANCH failed...
                                            whilem: failed, trying continuation...
   3 <abc> <>                | 15:            NOTHING(16)
   3 <abc> <>                | 16:            END(0)
Match successful!
Test:             $1='c', $2=''