fix some pathops bugs found in 1M skps

src/pathops/SkPathOpsDebug.h

Index: src/pathops/SkPathOpsDebug.h
diff --git a/src/pathops/SkPathOpsDebug.h b/src/pathops/SkPathOpsDebug.h
index 969a9907d51eb03e95a89d2c20b7c5c37edcb0e7..cdfddcf254fc457d0bfcf9fd3e7ac39241cfc40a 100644
--- a/src/pathops/SkPathOpsDebug.h
+++ b/src/pathops/SkPathOpsDebug.h
@@ -43,8 +43,10 @@
 #define DEBUG_ACTIVE_SPANS 0
 #define DEBUG_ADD_INTERSECTING_TS 0
 #define DEBUG_ADD_T 0
+#define DEBUG_ALIGNMENT 0
 #define DEBUG_ANGLE 0
 #define DEBUG_ASSEMBLE 0
+#define DEBUG_COINCIDENCE 0
 #define DEBUG_CUBIC_BINARY_SEARCH 0
 #define DEBUG_CUBIC_SPLIT 0
 #define DEBUG_DUMP_SEGMENTS 0
@@ -57,18 +59,22 @@
 #define DEBUG_SORT 0
 #define DEBUG_T_SECT 0
 #define DEBUG_T_SECT_DUMP 0
+#define DEBUG_T_SECT_LOOP_COUNT 0
 #define DEBUG_VALIDATE 0
 #define DEBUG_WINDING 0
 #define DEBUG_WINDING_AT_T 0
 
+
 #else
 
 #define DEBUG_ACTIVE_OP 1
 #define DEBUG_ACTIVE_SPANS 1
 #define DEBUG_ADD_INTERSECTING_TS 1
 #define DEBUG_ADD_T 1
+#define DEBUG_ALIGNMENT 0
 #define DEBUG_ANGLE 1
 #define DEBUG_ASSEMBLE 1
+#define DEBUG_COINCIDENCE 1
 #define DEBUG_CUBIC_BINARY_SEARCH 0
 #define DEBUG_CUBIC_SPLIT 1
 #define DEBUG_DUMP_SEGMENTS 1
@@ -79,8 +85,9 @@
 #define DEBUG_PERP 1
 #define DEBUG_SHOW_TEST_NAME 1
 #define DEBUG_SORT 1
-#define DEBUG_T_SECT 0
-#define DEBUG_T_SECT_DUMP 0
+#define DEBUG_T_SECT 1
+#define DEBUG_T_SECT_DUMP 1
+#define DEBUG_T_SECT_LOOP_COUNT 1
 #define DEBUG_VALIDATE 1
 #define DEBUG_WINDING 1
 #define DEBUG_WINDING_AT_T 1
@@ -117,6 +124,13 @@
     extern int gDumpTSectNum;
 #endif
 
+#if DEBUG_COINCIDENCE
+    #define DEBUG_COINCIDENCE_HEALTH(contourList, id) \
+            SkPathOpsDebug::CheckHealth(contourList, id)
+#else
+    #define DEBUG_COINCIDENCE_HEALTH(contourList, id)
+#endif
+
 #define CUBIC_DEBUG_STR  "{{{%1.9g,%1.9g}, {%1.9g,%1.9g}, {%1.9g,%1.9g}, {%1.9g,%1.9g}}}"
 #define CONIC_DEBUG_STR "{{{{%1.9g,%1.9g}, {%1.9g,%1.9g}, {%1.9g,%1.9g}}}, %1.9g}"
 #define QUAD_DEBUG_STR   "{{{%1.9g,%1.9g}, {%1.9g,%1.9g}, {%1.9g,%1.9g}}}"
@@ -142,6 +156,7 @@
 class SkPathOpsDebug {
 public:
     static const char* kLVerbStr[];
+    struct GlitchLog;
 
 #if defined(SK_DEBUG) || !FORCE_RELEASE
     static int gContourID;
@@ -157,6 +172,7 @@ public:
     static const char* kPathOpStr[];
 #endif
 
+    static void CoincidentHealth(class SkOpContourHead* contourList, const char* id);
     static void MathematicaIze(char* str, size_t bufferSize);
     static bool ValidWind(int winding);
     static void WindingPrintf(int winding);
@@ -175,6 +191,8 @@ public:
 
     static bool ChaseContains(const SkTDArray<class SkOpSpanBase*>& , const class SkOpSpanBase* );
 
+    static void CheckHealth(class SkOpContourHead* contourList, const char* id);
+
     static const struct SkOpAngle* DebugAngleAngle(const struct SkOpAngle*, int id);
     static class SkOpContour* DebugAngleContour(struct SkOpAngle*, int id);
     static const class SkOpPtT* DebugAnglePtT(const struct SkOpAngle*, int id);