fix pathops coincidence fuzz bug

tests/PathOpsSimplifyTest.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"
 
 #define TEST(name) { name, #name }
 
@@ skipping 5006 matching lines @@
 path.close();
 path.moveTo(123, 600);
 path.lineTo(3.35546e+07f, 600);
 path.lineTo(3.35546e+07f, 0);
 path.lineTo(123, 0);
 path.lineTo(123, 600);
 path.close();
     testSimplify(reporter, path, filename);
 }
 
+static void fuzz_twister2(skiatest::Reporter* reporter, const char* filename) {
+    SkPath path;
+
+path.moveTo(SkBits2Float(0x00000000), SkBits2Float(0x44160000));  // 0, 600
+path.lineTo(SkBits2Float(0x4bfffffe), SkBits2Float(0x44160000));  // 3.35544e+07f, 600
+path.lineTo(SkBits2Float(0x4bfffffe), SkBits2Float(0x00000000));  // 3.35544e+07f, 0
+path.lineTo(SkBits2Float(0x00000000), SkBits2Float(0x00000000));  // 0, 0
+path.lineTo(SkBits2Float(0x00000000), SkBits2Float(0x44160000));  // 0, 600
+path.close();
+
+path.moveTo(SkBits2Float(0x427c0000), SkBits2Float(0x00000000));  // 63, 0
+path.lineTo(SkBits2Float(0x4c00000f), SkBits2Float(0x00000000));  // 3.35545e+07f, 0
+path.lineTo(SkBits2Float(0x4c00000f), SkBits2Float(0x00000000));  // 3.35545e+07f, 0
+path.lineTo(SkBits2Float(0x427c0000), SkBits2Float(0x00000000));  // 63, 0
+path.close();
+
+path.moveTo(SkBits2Float(0x42ba0000), SkBits2Float(0x00000000));  // 93, 0
+path.lineTo(SkBits2Float(0x4c000016), SkBits2Float(0x00000000));  // 3.35545e+07f, 0
+path.lineTo(SkBits2Float(0x4c000016), SkBits2Float(0x00000000));  // 3.35545e+07f, 0
+path.lineTo(SkBits2Float(0x42ba0000), SkBits2Float(0x00000000));  // 93, 0
+path.close();
+
+path.moveTo(SkBits2Float(0x42f60000), SkBits2Float(0x00000000));  // 123, 0
+path.lineTo(SkBits2Float(0x4c00001e), SkBits2Float(0x00000000));  // 3.35546e+07f, 0
+path.lineTo(SkBits2Float(0x4c00001e), SkBits2Float(0x00000000));  // 3.35546e+07f, 0
+path.lineTo(SkBits2Float(0x42f60000), SkBits2Float(0x00000000));  // 123, 0
+path.close();
+
+    REPORTER_ASSERT(reporter, !Simplify(path, &path));
+}
+
 static void (*skipTest)(skiatest::Reporter* , const char* filename) = 0;
 static void (*firstTest)(skiatest::Reporter* , const char* filename) = 0;
 static void (*stopTest)(skiatest::Reporter* , const char* filename) = 0;
 
 static TestDesc tests[] = {
+    TEST(fuzz_twister2),
     TEST(fuzz_twister),
     TEST(fuzz994s_3414),
     TEST(fuzz994s_11),
     TEST(cr514118),
     TEST(fuzz864a),
     TEST(testQuads65),
     TEST(testIssue3838_3),
     TEST(testIssue3838),
     TEST(testArc),
     TEST(testTriangle2),
@@ skipping 433 matching lines @@
 
 DEF_TEST(PathOpsSimplify, reporter) {
     if (runSubTests && runSubTestsFirst) {
         RunTestSet(reporter, subTests, subTestCount, firstSubTest, nullptr, stopTest, runReverse);
     }
     RunTestSet(reporter, tests, testCount, firstTest, skipTest, stopTest, runReverse);
     if (runSubTests && !runSubTestsFirst) {
         RunTestSet(reporter, subTests, subTestCount, firstSubTest, nullptr, stopTest, runReverse);
     }
 }