fix NaN equality for trueEquals for compound types

plugin/src/Reconciler/trueEquals.lua

@@ -13,6 +13,12 @@ local NULL_REF: string = "00000000000000000000000000000000"
 local EPSILON: number = 0.0001
 
 local function fuzzyEq(a: number, b: number): boolean
+	if a == b then
+		return true
+	end
+	if a ~= a then
+		return b ~= b
+	end
 	local diff = math.abs(a - b)
 	local maxVal = math.max(math.abs(a), math.abs(b), 1)
 	return diff < EPSILON or diff < maxVal * EPSILON
@@ -90,9 +96,6 @@ local function trueEquals(a: any, b: any): boolean
 	end
 
 	if t == "number" then
-		if a ~= a then
-			return b ~= b
-		end
 		return fuzzyEq(a, b)
 	end
 	if t == "Color3" then

plugin/src/Reconciler/trueEquals.spec.lua

@@ -224,6 +224,14 @@ return function()
 		it("large values within relative epsilon", function()
 			expect(trueEquals(Vector3.new(1e6, 1e6, 1e6), Vector3.new(1e6 + 50, 1e6, 1e6))).to.equal(true)
 		end)
+
+		it("NaN component equal", function()
+			expect(trueEquals(Vector3.new(0 / 0, 1, 2), Vector3.new(0 / 0, 1, 2))).to.equal(true)
+		end)
+
+		it("NaN vs finite component", function()
+			expect(trueEquals(Vector3.new(0 / 0, 1, 2), Vector3.new(0, 1, 2))).to.equal(false)
+		end)
 	end)
 
 	describe("Vector2", function()
@@ -238,6 +246,22 @@ return function()
 		it("Y differs by 1", function()
 			expect(trueEquals(Vector2.new(1, 2), Vector2.new(1, 3))).to.equal(false)
 		end)
+
+		it("infinity components", function()
+			expect(trueEquals(Vector2.new(math.huge, math.huge), Vector2.new(math.huge, math.huge))).to.equal(true)
+		end)
+
+		it("mixed infinity and finite", function()
+			expect(trueEquals(Vector2.new(math.huge, 0), Vector2.new(math.huge, 1))).to.equal(false)
+		end)
+
+		it("NaN components", function()
+			expect(trueEquals(Vector2.new(0 / 0, 0 / 0), Vector2.new(0 / 0, 0 / 0))).to.equal(true)
+		end)
+
+		it("NaN vs finite component", function()
+			expect(trueEquals(Vector2.new(0 / 0, 1), Vector2.new(1, 1))).to.equal(false)
+		end)
 	end)
 
 	describe("CFrame", function()