layer at (0,0) size 834x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x600
  RenderBlock {HTML} at (0,0) size 800x600
    RenderBody {BODY} at (8,8) size 784x584
      RenderBlock (anonymous) at (0,0) size 784x80
        RenderText {#text} at (0,0) size 783x79
          text run at (0,0) width 439: "This is capturing current behavior, but it's not clear that it is correct. "
          text run at (438,0) width 299: "It's not clear if max-height on a columns block"
          text run at (0,20) width 299: "constitutes a constraint on the columns or not. "
          text run at (298,20) width 485: "You obviously begin trying to balance, but only run into the constraint once"
          text run at (0,40) width 296: "the balanced columns exceed the max-height. "
          text run at (295,40) width 334: "It's not clear that you should suddenly shift to a fill. "
          text run at (628,40) width 136: "Our current behavior"
          text run at (0,60) width 524: "(which matches Firefox) is to just overflow without changing from balance to fill."
layer at (8,88) size 404x64
  RenderBlock {DIV} at (0,80) size 404x64 [border: (2px solid #000000)]
    RenderMultiColumnSet at (2,2) size 400x60
layer at (10,90) size 61x600 backgroundClip at (0,0) size 834x600 clip at (0,0) size 834x600
  RenderMultiColumnFlowThread at (2,2) size 61x600
    RenderText {#text} at (0,1) size 51x118
      text run at (0,1) width 43: "This"
      text run at (0,31) width 17: "is"
      text run at (0,61) width 51: "some"
      text run at (0,91) width 36: "text"
    RenderBR {BR} at (35,90) size 1x28
    RenderText {#text} at (0,121) size 51x118
      text run at (0,121) width 43: "This"
      text run at (0,151) width 17: "is"
      text run at (0,181) width 51: "some"
      text run at (0,211) width 36: "text"
    RenderBR {BR} at (35,210) size 1x28
    RenderText {#text} at (0,241) size 51x118
      text run at (0,241) width 43: "This"
      text run at (0,271) width 17: "is"
      text run at (0,301) width 51: "some"
      text run at (0,331) width 36: "text"
    RenderBR {BR} at (35,330) size 1x28
    RenderText {#text} at (0,361) size 51x118
      text run at (0,361) width 43: "This"
      text run at (0,391) width 17: "is"
      text run at (0,421) width 51: "some"
      text run at (0,451) width 36: "text"
    RenderBR {BR} at (35,450) size 1x28
    RenderText {#text} at (0,481) size 51x118
      text run at (0,481) width 43: "This"
      text run at (0,511) width 17: "is"
      text run at (0,541) width 51: "some"
      text run at (0,571) width 36: "text"
    RenderBR {BR} at (35,570) size 1x28