provide safe exit for runaway intersections

tests/PathOpsOpTest.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "PathOpsExtendedTest.h"
 #include "PathOpsTestCommon.h"
 
 class PathTest_Private {
@@ skipping 7389 matching lines @@
 path.lineTo(SkBits2Float(0x1f2a312a), SkBits2Float(0xc0032108));  // 3.60396e-20f, -2.04889f
 path.close();
 path.moveTo(SkBits2Float(0x1f2a312a), SkBits2Float(0xc0032108));  // 3.60396e-20f, -2.04889f
 path.quadTo(SkBits2Float(0x3ab38a28), SkBits2Float(0x3ac22c21), SkBits2Float(0x6c401057), SkBits2Float(0x6d6d6b64));  // 0.00136978f, 0.00148142f, 9.28764e+26f, 4.59236e+27f
 path.cubicTo(SkBits2Float(0x6d6d6d6d), SkBits2Float(0x6d6d6d6d), SkBits2Float(0x286d6d6d), SkBits2Float(0x081d2a29), SkBits2Float(0x6d690321), SkBits2Float(0x6b6b026d));  // 4.59251e+27f, 4.59251e+27f, 1.31799e-14f, 4.7295e-34f, 4.50711e+27f, 2.84109e+26f
 
     SkPath path2(path);
     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),
     TEST(fuzz763_27),
     TEST(fuzz763_26),
     TEST(fuzz763_25),
     TEST(fuzz763_24),
     TEST(fuzz763_23),
     TEST(fuzz763_22),
     TEST(fuzz763_21),
@@ skipping 50 matching lines @@
 static struct TestDesc repTests[] = {
     TEST(loops44i),
     TEST(loops45i),
     TEST(loops46i),
 };
 
 DEF_TEST(PathOpsRepOp, reporter) {
   for (int index = 0; index < 2; ++index)
     RunTestSet(reporter, repTests, SK_ARRAY_COUNT(repTests), nullptr, nullptr, nullptr, false);
 }