let line/cubic intersect at four spots

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 6482 matching lines @@
 path.quadTo(SkBits2Float(0x2d28282a), SkBits2Float(0x5568295b), SkBits2Float(0x3a21df68), SkBits2Float(0x4f9a3a8a));  // 9.55861e-12f, 1.5954e+13f, 0.000617495f, 5.17506e+09f
 path.lineTo(SkBits2Float(0x0321081f), SkBits2Float(0x6a4b7bc0));  // 4.7323e-37f, 6.14991e+25f
 path.close();
 path.moveTo(SkBits2Float(0x0321081f), SkBits2Float(0x6a4b7bc0));  // 4.7323e-37f, 6.14991e+25f
 path.cubicTo(SkBits2Float(0x5568c23a), SkBits2Float(0x5b2d2968), SkBits2Float(0x212a8c55), SkBits2Float(0x21081f2a), SkBits2Float(0x3a7bc003), SkBits2Float(0x294b2827));  // 1.59951e+13f, 4.87407e+16f, 5.7784e-19f, 4.61198e-19f, 0.00096035f, 4.51099e-14f
 
     SkPath path2(path);
     testPathOpFail(reporter, path1, path2, (SkPathOp) 0, filename);
 }
 
+static void kfuzz2(skiatest::Reporter* reporter, const char* filename) {
+    SkPath path1;
+    SkPath path;
+path.moveTo(SkBits2Float(0x00000000), SkBits2Float(0xfafadbfa));  // 0, -6.51268e+35f
+path.close();
+path.moveTo(SkBits2Float(0x00000000), SkBits2Float(0xfafadbfa));  // 0, -6.51268e+35f
+path.cubicTo(SkBits2Float(0xe3000000), SkBits2Float(0xf19e92c7), SkBits2Float(0xf17febcb), SkBits2Float(0xff7febcb), SkBits2Float(0x60600100), SkBits2Float(0x0100ff60));  // -2.36118e+21f, -1.57043e+30f, -1.26726e+30f, -3.40177e+38f, 6.45647e+19f, 2.36931e-38f
+path.lineTo(SkBits2Float(0x00000000), SkBits2Float(0xfafadbfa));  // 0, -6.51268e+35f
+path.close();
+path.moveTo(SkBits2Float(0x00000000), SkBits2Float(0xfafadbfa));  // 0, -6.51268e+35f
+path.lineTo(SkBits2Float(0x60601a1d), SkBits2Float(0x60606060));  // 6.4593e+19f, 6.46721e+19f
+path.lineTo(SkBits2Float(0x00000000), SkBits2Float(0xfafadbfa));  // 0, -6.51268e+35f
+path.close();
+path.moveTo(SkBits2Float(0xe5e2f300), SkBits2Float(0xee244a40));  // -1.33967e+23f, -1.27113e+28f
+path.moveTo(SkBits2Float(0xba98ffee), SkBits2Float(0xfafafa1a));  // -0.0011673f, -6.51573e+35f
+path.close();
+path.moveTo(SkBits2Float(0xba98ffee), SkBits2Float(0xfafafa1a));  // -0.0011673f, -6.51573e+35f
+path.lineTo(SkBits2Float(0xfafafafa), SkBits2Float(0xe30000fa));  // -6.51582e+35f, -2.36125e+21f
+path.conicTo(SkBits2Float(0x92e592e5), SkBits2Float(0xfafafafb), SkBits2Float(0xc4fa0000), SkBits2Float(0x6060fafa), SkBits2Float(0x60606060));  // -1.44881e-27f, -6.51582e+35f, -2000, 6.48462e+19f, 6.46721e+19f
+path.lineTo(SkBits2Float(0xba98ffee), SkBits2Float(0xfafafa1a));  // -0.0011673f, -6.51573e+35f
+path.close();
+path.moveTo(SkBits2Float(0xba98ffee), SkBits2Float(0xfafafa1a));  // -0.0011673f, -6.51573e+35f
+path.cubicTo(SkBits2Float(0xe3000000), SkBits2Float(0xf19e92c7), SkBits2Float(0xf17febcb), SkBits2Float(0xff7febcb), SkBits2Float(0xfafafa00), SkBits2Float(0xfafafafa));  // -2.36118e+21f, -1.57043e+30f, -1.26726e+30f, -3.40177e+38f, -6.51572e+35f, -6.51582e+35f
+path.lineTo(SkBits2Float(0xba98ffee), SkBits2Float(0xfafafa1a));  // -0.0011673f, -6.51573e+35f
+path.close();
+path.moveTo(SkBits2Float(0xba98ffee), SkBits2Float(0xfafafa1a));  // -0.0011673f, -6.51573e+35f
+path.cubicTo(SkBits2Float(0xe3000000), SkBits2Float(0xe39e92c7), SkBits2Float(0xf17febcb), SkBits2Float(0xff7febcb), SkBits2Float(0xeed0ee9a), SkBits2Float(0x9a98ffca));  // -2.36118e+21f, -5.85032e+21f, -1.26726e+30f, -3.40177e+38f, -3.23307e+28f, -6.3279e-23f
+path.lineTo(SkBits2Float(0xba98ffee), SkBits2Float(0xfafafa1a));  // -0.0011673f, -6.51573e+35f
+path.close();
+SkPath path2(path);
+    testPathOpFail(reporter, path1, path2, kXOR_SkPathOp, filename);
+}
+
 static struct TestDesc failTests[] = {
+    TEST(kfuzz2),
     TEST(fuzz763_7),
     TEST(fuzz763_6),
     TEST(fuzz763_2c),
     TEST(fuzz763_2b),
     TEST(fuzz763_2a),
     TEST(fuzz763_5a),
     TEST(fuzz763_3a),
     TEST(fuzz763_1a),
     TEST(fuzz763_1b),
     TEST(fuzz763_1c),
@@ skipping 28 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);
 }