provide safe exit for runaway intersections

tests/PathOpsOpTest.cpp

Index: tests/PathOpsOpTest.cpp
diff --git a/tests/PathOpsOpTest.cpp b/tests/PathOpsOpTest.cpp
index 3316f7e0cb243c90d172b517daa76e1de92f899d..6aedd128dd8797c748cc6cbfb6a18661c86f9956 100644
--- a/tests/PathOpsOpTest.cpp
+++ b/tests/PathOpsOpTest.cpp
@@ -7407,7 +7407,33 @@ path.cubicTo(SkBits2Float(0x6d6d6d6d), SkBits2Float(0x6d6d6d6d), SkBits2Float(0x
     testPathOpFuzz(reporter, path1, path2, (SkPathOp) 2, filename);
 }
 
+static void fuzz763_31(skiatest::Reporter* reporter, const char* filename) {
+    SkPath path;
+    path.setFillType((SkPath::FillType) 1);
+
+    SkPath path1(path);
+    path.reset();
+    path.setFillType((SkPath::FillType) 0);
+path.moveTo(SkBits2Float(0xd72a8c55), SkBits2Float(0x61081f2a));  // -1.8752e+14f, 1.56938e+20f
+path.conicTo(SkBits2Float(0x6a4b7bc0), SkBits2Float(0x4793ed7a), SkBits2Float(0x282a3a21), SkBits2Float(0xdf3a2128), SkBits2Float(0x471ac575));  // 6.14991e+25f, 75739, 9.4495e-15f, -1.3412e+19f, 39621.5f
+path.lineTo(SkBits2Float(0x28404040), SkBits2Float(0x552a298a));  // 1.06721e-14f, 1.16935e+13f
+path.moveTo(SkBits2Float(0x212c685b), SkBits2Float(0x21081f2a));  // 5.8414e-19f, 4.61198e-19f
+path.conicTo(SkBits2Float(0x6a4b7bc0), SkBits2Float(0x80ed7a3a), SkBits2Float(0x2a3a2147), SkBits2Float(0xdf212828), SkBits2Float(0x4f1a3a3a));  // 6.14991e+25f, -2.18089e-38f, 1.65317e-13f, -1.16126e+19f, 2.58751e+09f
+path.lineTo(SkBits2Float(0x212c685b), SkBits2Float(0x21081f2a));  // 5.8414e-19f, 4.61198e-19f
+path.close();
+path.moveTo(SkBits2Float(0x212c685b), SkBits2Float(0x21081f2a));  // 5.8414e-19f, 4.61198e-19f
+path.cubicTo(SkBits2Float(0x3ac2213a), SkBits2Float(0x432a2928), SkBits2Float(0x96812be6), SkBits2Float(0x272a1d2a), SkBits2Float(0x3a2a3529), SkBits2Float(0x3b1e2ab0));  // 0.00148109f, 170.161f, -2.08688e-25f, 2.3608e-15f, 0.000649291f, 0.00241343f
+path.lineTo(SkBits2Float(0x212c685b), SkBits2Float(0x21081f2a));  // 5.8414e-19f, 4.61198e-19f
+path.close();
+path.moveTo(SkBits2Float(0x212c685b), SkBits2Float(0x21081f2a));  // 5.8414e-19f, 4.61198e-19f
+path.cubicTo(SkBits2Float(0xc5272927), SkBits2Float(0x22383b39), SkBits2Float(0x1051523a), SkBits2Float(0x2927b029), SkBits2Float(0x685b2d27), SkBits2Float(0x5b2d6855));  // -2674.57f, 2.4968e-18f, 4.12813e-29f, 3.72342e-14f, 4.14012e+24f, 4.88099e+16f
+
+    SkPath path2(path);
+    testPathOpFuzz(reporter, path1, path2, (SkPathOp) 4, filename);
+}
+
 static struct TestDesc failTests[] = {
+    TEST(fuzz763_31),
     TEST(fuzz763_30),
     TEST(fuzz763_29),
     TEST(fuzz763_28),