EllipticalArc intersection failure

[jonathanolson]

Reproducible in playground with:

kite.Shape.union( [ new kite.Shape( 'M 8.00000000000000355271 -66.00000000000000000000 A 16.00000000000000000000 9.00000000000000000000 360 1 0 7.99999999999999911182 -84.00000000000000000000 A 24.00000000000000000000 9.00000000000000000000 360 1 1 8.00000000000000355271 -66.00000000000000000000 ' ) ] );

The box intersection creates an infinite number of boxes. Noticed by @marlitas in fractions-intro (with fractions-common branch implementBeaker) when using the helper to inspect the beaker.

[jonathanolson]

Had a failure in quantum-measurement noticed by @AgustinVallejo, with the shapes represented by:

[
    "M 100.00000000000000000000 0.00000000000000000000 A 100.00000000000000000000 100.00000000000000000000 0 0 1 -100.00000000000000000000 0.00000000000001224647 A 100.00000000000000000000 100.00000000000000000000 0 0 1 100.00000000000000000000 -0.00000000000002449294 Z ",
    "M 100.00000000000000000000 0.00000000000000000000 A 100.00000000000000000000 17.36481776669303300764 0 0 1 -100.00000000000000000000 0.00000000000000212658 A 100.00000000000000000000 17.36481776669303300764 0 0 1 100.00000000000000000000 -0.00000000000000425315 Z ",
    "M 39.19420183256686840423 17.81759111665348171982 L 59.20982683256686840423 17.81759111665348171982 L 59.20982683256686840423 34.81759111665348171982 L 39.19420183256686840423 34.81759111665348171982 L 39.19420183256686840423 17.81759111665348171982 Z ",
    "M 83.96144957859084456686 -19.43911746138847007614 L 103.97707457859084456686 -19.43911746138847007614 L 103.97707457859084456686 -2.43911746138847007614 L 83.96144957859084456686 -2.43911746138847007614 L 83.96144957859084456686 -19.43911746138847007614 Z ",
    "M -24.55859375000000000000 -103.50000000000000000000 L -5.44140625000000000000 -103.50000000000000000000 L -5.44140625000000000000 -86.50000000000000000000 L -24.55859375000000000000 -86.50000000000000000000 L -24.55859375000000000000 -103.50000000000000000000 Z ",
    "M 0.00000000000000209427 -50.00000000000000000000 A 50.00000000000000000000 17.10100716628343420211 90 0 1 16.87778614003039834301 8.05229804623230371874 L 0.00000000000000209427 -50.00000000000000000000 Z ",
    "M 24.53068077614812736442 13.36542119598685474102 L -0.64589779278182390954 1.35381536454553774718 L 0.64589779278182390954 -1.35381536454553774718 L 25.82247636171177518349 10.65779046689577924667 L 27.32957121153603097241 7.49888794962285754053 L 34.20201433256686840423 16.31759111665347816711 L 23.02358592632387157551 16.52432371325977555898 L 24.53068077614812736442 13.36542119598685474102 Z "
]

with a Shape.union.

[AgustinVallejo]

Related to phetsims/quantum-measurement#73