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A line in area type of a shape other than a rectangle was measured at five heights of its band, so an edge that pinched in between two of them (a notch tip at y = 47.5 in a 40..60 band) left the line running outside the frame. The frame's intervals over a band are now the intervals at its middle minus the x range of every edge within the band, which is exact for any number of vertices, holes and crossing contours. Edges that contours meet along do not shorten a line: horizontal ones count by coverage, and collinear ones by overlap, and an edge that only touches the top or bottom of the band is left out. Rectangles keep their fast path. Text wrap shapes were sampled at the same five heights, so a wrap object whose tip reached into a band between two of them let the line run across it. A line now keeps clear of every x at which a wrap shape, grown by its offset, lies anywhere in the band: the shape's intervals at the middle of the band plus every edge within it. With Invert Wrap, the band is cut into pieces a quarter of the offset tall (64 at most), and a line keeps to the x within the offset of the shape at the heights each piece's offset window holds, so it stays inside the grown shape over the whole band; an offset of 0 takes the shape's intervals over the whole band. A frame less than 0.0002 pt tall no longer panics when a line is measured in it.