diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7c453c7e..743d7dfd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,7 +22,7 @@ cmake_minimum_required(VERSION 3.2)
 # There is no C per se in WDT but if you use CXX only here many checks fail
 # Version is Major.Minor.YYMMDDX for up to 10 releases per day
 # Minor currently is also the protocol version - has to match with Protocol.cpp
-project("WDT" LANGUAGES C CXX VERSION 1.19.1509160)
+project("WDT" LANGUAGES C CXX VERSION 1.19.1509200)
 
 # On MacOS this requires the latest (master) CMake (and/or CMake 3.1.1/3.2)
 set(CMAKE_CXX_STANDARD 11)
diff --git a/DirectorySourceQueue.cpp b/DirectorySourceQueue.cpp
index 7a224fe9..a6bc660b 100644
--- a/DirectorySourceQueue.cpp
+++ b/DirectorySourceQueue.cpp
@@ -128,6 +128,14 @@ bool DirectorySourceQueue::setRootDir(const string &newRootDir) {
   return true;
 }
 
+void DirectorySourceQueue::clearSourceQueue() {
+  // clear current content of the queue. For some reason, priority_queue does
+  // not have a clear method
+  while (!sourceQueue_.empty()) {
+    sourceQueue_.pop();
+  }
+}
+
 void DirectorySourceQueue::setPreviouslyReceivedChunks(
     std::vector<FileChunksInfo> &previouslyTransferredChunks) {
   std::unique_lock<std::mutex> lock(mutex_);
@@ -142,11 +150,7 @@ void DirectorySourceQueue::setPreviouslyReceivedChunks(
     previouslyTransferredChunks_.insert(
         std::make_pair(chunkInfo.getFileName(), std::move(chunkInfo)));
   }
-  // clear current content of the queue. For some reason, priority_queue does
-  // not have a clear method
-  while (!sourceQueue_.empty()) {
-    sourceQueue_.pop();
-  }
+  clearSourceQueue();
   std::vector<SourceMetaData *> discoveredFileData = std::move(sharedFileData_);
   // recreate the queue
   for (const auto fileData : discoveredFileData) {
@@ -157,6 +161,9 @@ void DirectorySourceQueue::setPreviouslyReceivedChunks(
 }
 
 DirectorySourceQueue::~DirectorySourceQueue() {
+  // need to remove all the sources because they access metadata at the
+  // destructor.
+  clearSourceQueue();
   for (SourceMetaData *fileData : sharedFileData_) {
     delete fileData;
   }
diff --git a/DirectorySourceQueue.h b/DirectorySourceQueue.h
index c4c45206..07cc4f79 100644
--- a/DirectorySourceQueue.h
+++ b/DirectorySourceQueue.h
@@ -271,6 +271,9 @@ class DirectorySourceQueue : public SourceQueue {
    */
   void smartNotify(int32_t addedSource);
 
+  /// Removes all elements from the source queue
+  void clearSourceQueue();
+
   /// root directory to recurse on if fileInfo_ is empty
   std::string rootDir_;
 
diff --git a/WdtConfig.h b/WdtConfig.h
index 9acdcc49..b4ec08dd 100644
--- a/WdtConfig.h
+++ b/WdtConfig.h
@@ -8,9 +8,9 @@
 
 #define WDT_VERSION_MAJOR 1
 #define WDT_VERSION_MINOR 19
-#define WDT_VERSION_BUILD 1509160
+#define WDT_VERSION_BUILD 1509200
 // Add -fbcode to version str
-#define WDT_VERSION_STR "1.19.1509160-fbcode"
+#define WDT_VERSION_STR "1.19.1509200-fbcode"
 // Tie minor and proto version
 #define WDT_PROTOCOL_VERSION WDT_VERSION_MINOR