Fix CPDFSDK_FormFillEnvironment destruction order

fpdfsdk/cpdfsdk_formfillenvironment.cpp

Index: fpdfsdk/cpdfsdk_formfillenvironment.cpp
diff --git a/fpdfsdk/cpdfsdk_formfillenvironment.cpp b/fpdfsdk/cpdfsdk_formfillenvironment.cpp
index 9852bdc9b9cea9c62b094d28aacda25fc51f12f6..8ab3b46a916971d040b727c9f1f749e6129f3adc 100644
--- a/fpdfsdk/cpdfsdk_formfillenvironment.cpp
+++ b/fpdfsdk/cpdfsdk_formfillenvironment.cpp
@@ -41,12 +41,14 @@ CPDFSDK_FormFillEnvironment::CPDFSDK_FormFillEnvironment(
 
 CPDFSDK_FormFillEnvironment::~CPDFSDK_FormFillEnvironment() {
   m_bBeingDestroyed = true;
-
   ClearAllFocusedAnnots();
 
-  // |m_pAnnotHandlerMgr| will try to access |m_pFormFiller|
-  // when it cleans up. So, we must make sure it is cleaned up before
-  // |m_pFormFiller|.
+  // |m_PageMap| will try to access |m_pInterForm| when it cleans itself up.
+  // Make sure it is deleted before |m_pInterForm|.
+  m_PageMap.clear();
+
+  // |m_pAnnotHandlerMgr| will try to access |m_pFormFiller| when it cleans
+  // itself up. Make sure it is deleted before |m_pFormFiller|.
   m_pAnnotHandlerMgr.reset();
 
   // Must destroy the |m_pFormFiller| before the environment (|this|)
@@ -563,7 +565,7 @@ void CPDFSDK_FormFillEnvironment::PageEvent(int iPageCount,
 #endif  // PDF_ENABLE_XFA
 
 void CPDFSDK_FormFillEnvironment::ClearAllFocusedAnnots() {
-  for (auto& it : m_pageMap) {
+  for (auto& it : m_PageMap) {
     if (it.second->IsValidSDKAnnot(GetFocusAnnot()))
       KillFocusAnnot(0);
   }
@@ -572,15 +574,15 @@ void CPDFSDK_FormFillEnvironment::ClearAllFocusedAnnots() {
 CPDFSDK_PageView* CPDFSDK_FormFillEnvironment::GetPageView(
     UnderlyingPageType* pUnderlyingPage,
     bool renew) {
-  auto it = m_pageMap.find(pUnderlyingPage);
-  if (it != m_pageMap.end())
+  auto it = m_PageMap.find(pUnderlyingPage);
+  if (it != m_PageMap.end())
     return it->second.get();
 
   if (!renew)
     return nullptr;
 
   CPDFSDK_PageView* pPageView = new CPDFSDK_PageView(this, pUnderlyingPage);
-  m_pageMap[pUnderlyingPage].reset(pPageView);
+  m_PageMap[pUnderlyingPage].reset(pPageView);
   // Delay to load all the annotations, to avoid endless loop.
   pPageView->LoadFXAnnots();
   return pPageView;
@@ -598,8 +600,8 @@ CPDFSDK_PageView* CPDFSDK_FormFillEnvironment::GetPageView(int nIndex) {
   if (!pTempPage)
     return nullptr;
 
-  auto it = m_pageMap.find(pTempPage);
-  return it != m_pageMap.end() ? it->second.get() : nullptr;
+  auto it = m_PageMap.find(pTempPage);
+  return it != m_PageMap.end() ? it->second.get() : nullptr;
 }
 
 void CPDFSDK_FormFillEnvironment::ProcJavascriptFun() {
@@ -647,8 +649,8 @@ bool CPDFSDK_FormFillEnvironment::ProcOpenAction() {
 
 void CPDFSDK_FormFillEnvironment::RemovePageView(
     UnderlyingPageType* pUnderlyingPage) {
-  auto it = m_pageMap.find(pUnderlyingPage);
-  if (it == m_pageMap.end())
+  auto it = m_PageMap.find(pUnderlyingPage);
+  if (it == m_PageMap.end())
     return;
 
   CPDFSDK_PageView* pPageView = it->second.get();
@@ -669,7 +671,7 @@ void CPDFSDK_FormFillEnvironment::RemovePageView(
 
   // Remove the page from the map to make sure we don't accidentally attempt
   // to use the |pPageView| while we're cleaning it up.
-  m_pageMap.erase(it);
+  m_PageMap.erase(it);
 }
 
 UnderlyingPageType* CPDFSDK_FormFillEnvironment::GetPage(int nIndex) {
@@ -684,7 +686,7 @@ CPDFSDK_InterForm* CPDFSDK_FormFillEnvironment::GetInterForm() {
 
 void CPDFSDK_FormFillEnvironment::UpdateAllViews(CPDFSDK_PageView* pSender,
                                                  CPDFSDK_Annot* pAnnot) {
-  for (const auto& it : m_pageMap) {
+  for (const auto& it : m_PageMap) {
     CPDFSDK_PageView* pPageView = it.second.get();
     if (pPageView != pSender)
       pPageView->UpdateView(pAnnot);