fix memleaks

arangod/RocksDBEngine/RocksDBKey.cpp

@@ -33,6 +33,24 @@ using namespace arangodb::rocksutils;
 
 const char RocksDBKey::_stringSeparator = '\0';
   
+RocksDBKey::RocksDBKey(std::string* leased)
+      : _type(RocksDBEntryType::Document),  // placeholder
+        _local(),
+        _buffer(leased != nullptr ? leased : &_local) {}
+
+RocksDBKey::RocksDBKey(rocksdb::Slice slice)
+      : _type(static_cast<RocksDBEntryType>(slice.data()[0])),
+        _local(slice.data(), slice.size()),
+        _buffer(&_local) {}
+  
+RocksDBKey::RocksDBKey(RocksDBKey&& other) noexcept
+      : _type(other._type),
+        _local(),
+        _buffer(&_local) {
+  _local.assign(std::move(*(other._buffer)));
+  other._buffer = &(other._local);
+}
+  
 /// @brief verify that a key actually contains the given local document id
 bool RocksDBKey::containsLocalDocumentId(LocalDocumentId const& documentId) const {
   switch (_type) {

arangod/RocksDBEngine/RocksDBKey.h

@@ -47,23 +47,11 @@ class RocksDBKey {
   
   /// @brief construct a leased RocksDBKey
   /// @param leased will use _local std::string if nullptr
-  explicit RocksDBKey(std::string* leased)
-      : _type(RocksDBEntryType::Document),  // placeholder
-        _local(),
-        _buffer(leased != nullptr ? leased : &_local) {}
+  explicit RocksDBKey(std::string* leased);
 
-  explicit RocksDBKey(rocksdb::Slice slice)
-      : _type(static_cast<RocksDBEntryType>(slice.data()[0])),
-        _local(slice.data(), slice.size()),
-        _buffer(&_local) {}
+  explicit RocksDBKey(rocksdb::Slice slice);
 
-  RocksDBKey(RocksDBKey&& other) noexcept
-      : _type(other._type),
-        _local(),
-        _buffer(&_local) {
-     _local.assign(std::move(*(other._buffer)));
-     other._buffer = &(other._local);
-    }
+  RocksDBKey(RocksDBKey&& other) noexcept;
 
   RocksDBKey& operator=(RocksDBKey const& other) = delete;
   RocksDBKey& operator=(RocksDBKey&& other) = delete;

arangod/Transaction/Context.cpp

@@ -98,11 +98,14 @@ transaction::Context::~Context() {
     delete it;
   }
 
+  // clear all strings handed out
+  for (auto& it : _strings) {
+    delete it;
+  }
+
   if (_ownsResolver) {
     delete _resolver;
   }
-
-  _resolver = nullptr;
 }
 
 /// @brief factory to create a custom type handler, not managed