Remove "this==NULL" and adjust corresponding callers

core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
  
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "../../../include/fpdfapi/fpdf_page.h"
 #include "../../../include/fpdfapi/fpdf_module.h"
 #include "../../../include/fxcodec/fx_codec.h"
 #include "pageint.h"
@@ skipping 73 matching lines @@
                 return;
             }
         }
         if (type != CPDF_StreamParser::Name) {
             break;
         }
         CFX_ByteString key((FX_LPCSTR)m_pSyntax->GetWordBuf() + 1, m_pSyntax->GetWordSize() - 1);
         CPDF_Object* pObj = m_pSyntax->ReadNextObject();
         if (!key.IsEmpty()) {
             pDict->SetAt(key, pObj, m_pDocument);
-        } else {
+        } else if (pObj) {
             pObj->Release();
         }
     }
     _PDF_ReplaceAbbr(pDict);
     CPDF_Object* pCSObj = NULL;
     if (pDict->KeyExist(FX_BSTRC("ColorSpace"))) {
         pCSObj = pDict->GetElementValue(FX_BSTRC("ColorSpace"));
         if (pCSObj->GetType() == PDFOBJ_NAME) {
             CFX_ByteString name = pCSObj->GetString();
             if (name != FX_BSTRC("DeviceRGB") && name != FX_BSTRC("DeviceGray") && name != FX_BSTRC("DeviceCMYK")) {
@@ skipping 952 matching lines @@
                     m_pStreamArray = NULL;
                 } else {
                     m_pData = (FX_LPBYTE)m_pSingleStream->GetData();
                     m_Size = m_pSingleStream->GetSize();
                 }
                 m_InternalStage = PAGEPARSE_STAGE_PARSE;
                 m_CurrentOffset = 0;
             } else {
                 CPDF_Array* pContent = m_pObjects->m_pFormDict->GetArray(FX_BSTRC("Contents"));
                 m_pStreamArray[m_CurrentOffset] = FX_NEW CPDF_StreamAcc;
-                CPDF_Stream* pStreamObj = (CPDF_Stream*)pContent->GetElementValue(m_CurrentOffset);
+                CPDF_Stream* pStreamObj = (CPDF_Stream*)(pContent ? pContent->GetElementValue(m_CurrentOffset) : NULL);
                 m_pStreamArray[m_CurrentOffset]->LoadAllData(pStreamObj, FALSE);
                 m_CurrentOffset ++;
             }
         }
         if (m_InternalStage == PAGEPARSE_STAGE_PARSE) {
             if (m_pParser == NULL) {
                 m_pParser = FX_NEW CPDF_StreamContentParser;
                 m_pParser->Initialize();
                 m_pParser->PrepareParse(m_pObjects->m_pDocument, m_pObjects->m_pPageResources, NULL, NULL, m_pObjects,
                                         m_pObjects->m_pResources, &m_pObjects->m_BBox, &m_Options, NULL, 0);
@@ skipping 59 matching lines @@
         return 100;
     }
     if (m_InternalStage == PAGEPARSE_STAGE_GETCONTENT) {
         return 10;
     }
     if (m_InternalStage == PAGEPARSE_STAGE_CHECKCLIP) {
         return 90;
     }
     return 10 + 80 * m_CurrentOffset / m_Size;
 }