         [regex, body, closed] = match
         @validateEscapes body, isRegex: yes, offsetInChunk: 1
         index = regex.length
-        [..., prev] = @tokens
+        prev = @prev()
         if prev
           if prev.spaced and prev[0] in CALLABLE
             return 0 if not closed or POSSIBLY_DIVISION.test regex

    else
      value = @chunk.charAt 0
    tag  = value
    [..., prev] = @tokens

    if prev and value in ['=', COMPOUND_ASSIGN...]
      skipToken = false

      @token 'DEFAULT', id
      return id.length

    prev = @prev()

    tag =
      if colon or prev? and
