metapict
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The function `bez-arc-length` needs to test for unbounded control points.
The function bez-arc-length
doesn't handle the case where +inf.0 are used as coordinates.
#(struct:bez #(struct:pt 203.2 0.0) #(struct:pt +inf.0 +inf.0) #(struct:pt -inf.0 -inf.0) #(struct:pt 203.15 0.0))