atching REx `^s(?:al|pre)?ad$' against `sad' Setting an EVAL scope, savestack=6 0 <> | 1: BOL 0 <> | 2: EXACT 1 | 4: CURLYX[0] {0,1} 1 | 13: WHILEM 0 out of 0..1 cc=bfbfe980 Setting an EVAL scope, savestack=12 1 | 6: BRANCH Setting an EVAL scope, savestack=22 1 | 7: EXACT failed... 1 | 10: EXACT
                                  failed...
  Clearing an EVAL scope, savestack=12..22
                              failed, try continuation...
   1               | 14:      NOTHING
   1               | 15:      EXACT 
   3  <>             | 17:      EOL
   3  <>             | 18:      END
Match successful!

Guessing start of match, REx `^s(?:al|pre)?ad$' against `salad'...
Found floating substr `ad'$ at offset 3...
Found anchored substr `s' at offset 0...
Guessed: match at offset 0
Matching REx `^s(?:al|pre)?ad$' against `salad'
  Setting an EVAL scope, savestack=6
   0 <>            |  1:  BOL
   0 <>            |  2:  EXACT 
   1             |  4:  CURLYX[0] {0,1}
   1             | 13:    WHILEM
                              0 out of 0..1  cc=bfbfe980
  Setting an EVAL scope, savestack=12
   1             |  6:      BRANCH
  Setting an EVAL scope, savestack=22
   1             |  7:        EXACT 
   3             | 13:        WHILEM
                                  1 out of 0..1  cc=bfbfe980
   3             | 14:          NOTHING
   3             | 15:          EXACT 
   5  <>           | 17:          EOL
   5  <>           | 18:          END
Match successful!