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                text run at (1,1) width 644: "This test succeeds if it does not crash. We implemented a heuristic a while back to prevent giant rowspans. "
                text run at (645,1) width 126: "The heuristic did not,"
                text run at (1,21) width 611: "however, fix this case. This rowpsan was small enough so that we thought it was okay to allocate, but "
                text run at (612,21) width 131: "large enough so that it"
                text run at (1,41) width 599: "actually wasn't okay, and we crashed. Firefox seems to hold 8k as the maximum size for rowspans. "
                text run at (600,41) width 140: "So this change matches"
                text run at (1,61) width 341: "Firefox and clamps all rowspans to 8k right in the DOM."