Patches memory leak and crashing

src/core/SkDevice.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkDevice.h"
 #include "SkDraw.h"
 #include "SkMetaData.h"
@@ skipping 68 matching lines @@
     this->drawPath(draw, path, paint, preMatrix, pathIsMutable);
 }
 
 void SkBaseDevice::drawPatch(const SkDraw& draw, const SkPoint cubics[12], const SkColor colors[4],
                              const SkPoint texCoords[4], SkXfermode* xmode, const SkPaint& paint) {
     SkPatchUtils::VertexData data;
     
     SkISize lod = SkPatchUtils::GetLevelOfDetail(cubics, draw.fMatrix);
 
     // It automatically adjusts lodX and lodY in case it exceeds the number of indices.
-    SkPatchUtils::getVertexData(&data, cubics, colors, texCoords, lod.width(), lod.height());
-    this->drawVertices(draw, SkCanvas::kTriangles_VertexMode, data.fVertexCount, data.fPoints,
-                       data.fTexCoords, data.fColors, xmode, data.fIndices, data.fIndexCount,
-                       paint);
+    // If it fails to generate the vertices, then we do not draw. 
+    if (SkPatchUtils::getVertexData(&data, cubics, colors, texCoords, lod.width(), lod.height())) {
+        this->drawVertices(draw, SkCanvas::kTriangles_VertexMode, data.fVertexCount, data.fPoints,
+                           data.fTexCoords, data.fColors, xmode, data.fIndices, data.fIndexCount,
+                           paint);
+    }
 }
 
 bool SkBaseDevice::readPixels(const SkImageInfo& info, void* dstP, size_t rowBytes, int x, int y) {
 #ifdef SK_DEBUG
     SkASSERT(info.width() > 0 && info.height() > 0);
     SkASSERT(dstP);
     SkASSERT(rowBytes >= info.minRowBytes());
     SkASSERT(x >= 0 && y >= 0);
 
     const SkImageInfo& srcInfo = this->imageInfo();
@@ skipping 44 matching lines @@
 
 void SkBaseDevice::EXPERIMENTAL_optimize(const SkPicture* picture) {
     // The base class doesn't perform any analysis but derived classes may
 }
 
 bool SkBaseDevice::EXPERIMENTAL_drawPicture(SkCanvas*, const SkPicture*, const SkMatrix*,
                                             const SkPaint*) {
     // The base class doesn't perform any accelerated picture rendering
     return false;
 }