Crashes and hangs in ctx.arc()

[zbjornson]

Steps to Reproduce

Many of these from the web-platform-tests crash or hang (more than the ones I marked):

it("2d.path.arc.nonfinite", function () {
	const canvas = createCanvas(100, 150);
	const ctx = canvas.getContext("2d");
	ctx.fillStyle = '#f00';
	ctx.fillRect(0, 0, 100, 50);
	ctx.moveTo(0, 0);
	ctx.lineTo(100, 0);
	ctx.arc(Infinity, 0, 50, 0, 2*Math.PI, true);
	ctx.arc(-Infinity, 0, 50, 0, 2*Math.PI, true);
	ctx.arc(NaN, 0, 50, 0, 2*Math.PI, true);
	ctx.arc(0, Infinity, 50, 0, 2*Math.PI, true);
	ctx.arc(0, -Infinity, 50, 0, 2*Math.PI, true);
	ctx.arc(0, NaN, 50, 0, 2*Math.PI, true);
	ctx.arc(0, 0, Infinity, 0, 2*Math.PI, true); // hang
	ctx.arc(0, 0, -Infinity, 0, 2*Math.PI, true);
	ctx.arc(0, 0, NaN, 0, 2*Math.PI, true);
	ctx.arc(0, 0, 50, Infinity, 2*Math.PI, true); // assertion failure
	ctx.arc(0, 0, 50, -Infinity, 2*Math.PI, true);
	ctx.arc(0, 0, 50, NaN, 2*Math.PI, true); // assertion failure
	ctx.arc(0, 0, 50, 0, Infinity, true); // assertion failure
	ctx.arc(0, 0, 50, 0, -Infinity, true);
	ctx.arc(0, 0, 50, 0, NaN, true);
	ctx.arc(Infinity, Infinity, 50, 0, 2*Math.PI, true);
	ctx.arc(Infinity, Infinity, Infinity, 0, 2*Math.PI, true);
	ctx.arc(Infinity, Infinity, Infinity, Infinity, 2*Math.PI, true);
	ctx.arc(Infinity, Infinity, Infinity, Infinity, Infinity, true);
	ctx.arc(Infinity, Infinity, Infinity, 0, Infinity, true);
	ctx.arc(Infinity, Infinity, 50, Infinity, 2*Math.PI, true);
	ctx.arc(Infinity, Infinity, 50, Infinity, Infinity, true);
	ctx.arc(Infinity, Infinity, 50, 0, Infinity, true);
	ctx.arc(Infinity, 0, Infinity, 0, 2*Math.PI, true);
	ctx.arc(Infinity, 0, Infinity, Infinity, 2*Math.PI, true);
	ctx.arc(Infinity, 0, Infinity, Infinity, Infinity, true);
	ctx.arc(Infinity, 0, Infinity, 0, Infinity, true);
	ctx.arc(Infinity, 0, 50, Infinity, 2*Math.PI, true);
	ctx.arc(Infinity, 0, 50, Infinity, Infinity, true);
	ctx.arc(Infinity, 0, 50, 0, Infinity, true);
	ctx.arc(0, Infinity, Infinity, 0, 2*Math.PI, true);
	ctx.arc(0, Infinity, Infinity, Infinity, 2*Math.PI, true);
	ctx.arc(0, Infinity, Infinity, Infinity, Infinity, true);
	ctx.arc(0, Infinity, Infinity, 0, Infinity, true);
	ctx.arc(0, Infinity, 50, Infinity, 2*Math.PI, true);
	ctx.arc(0, Infinity, 50, Infinity, Infinity, true);
	ctx.arc(0, Infinity, 50, 0, Infinity, true);
	ctx.arc(0, 0, Infinity, Infinity, 2*Math.PI, true);
	ctx.arc(0, 0, Infinity, Infinity, Infinity, true);
	ctx.arc(0, 0, Infinity, 0, Infinity, true);
	ctx.arc(0, 0, 50, Infinity, Infinity, true);
});

Your Environment

• Version of node-canvas (output of npm list canvas or yarn list canvas): HEAD (2.9.1)
• Environment (e.g. node 4.2.0 on Mac OS X 10.8): all