diff --git a/dsl.cc b/dsl.cc
index 6125342e..ae1e6b42 100644
--- a/dsl.cc
+++ b/dsl.cc
@@ -128,11 +128,7 @@ struct InsidedCard
   InsidedCard( uint32_t _offset, uint32_t _size, QVector< wstring > const & words ) :
   offset( _offset ), size( _size ), headwords( words )
   {}
-  InsidedCard( InsidedCard const & e ) :
-  offset( e.offset ), size( e.size ), headwords( e.headwords )
-  {}
   InsidedCard() {}
-
 };
 
 bool indexIsOldOrBad( string const & indexFile, bool hasZipFile )
diff --git a/ftshelpers.cc b/ftshelpers.cc
index 0d775282..c1a8f08f 100644
--- a/ftshelpers.cc
+++ b/ftshelpers.cc
@@ -399,11 +399,6 @@ bool isCJKChar( ushort ch )
   return false;
 }
 
-void FTSResultsRequestRunnable::run()
-{
-  r.run();
-}
-
 void FTSResultsRequest::checkArticles( QVector< uint32_t > const & offsets,
                                        QStringList const & words,
                                        QRegExp const & searchRegexp )
diff --git a/ftshelpers.hh b/ftshelpers.hh
index f8392d09..6d0fa29a 100644
--- a/ftshelpers.hh
+++ b/ftshelpers.hh
@@ -65,28 +65,6 @@ void makeFTSIndex( BtreeIndexing::BtreeDictionary * dict, QAtomicInt & isCancell
 
 bool isCJKChar( ushort ch );
 
-class FTSResultsRequest;
-
-class FTSResultsRequestRunnable : public QRunnable
-{
-  FTSResultsRequest & r;
-  QSemaphore & hasExited;
-
-public:
-
-  FTSResultsRequestRunnable( FTSResultsRequest & r_,
-                             QSemaphore & hasExited_ ) : r( r_ ),
-                                                         hasExited( hasExited_ )
-  {}
-
-  ~FTSResultsRequestRunnable()
-  {
-    hasExited.release();
-  }
-
-  virtual void run();
-};
-
 class FTSResultsRequest : public Dictionary::DataRequest
 {
   BtreeIndexing::BtreeDictionary & dict;
@@ -102,7 +80,6 @@ class FTSResultsRequest : public Dictionary::DataRequest
   int wordsInIndex;
 
   QAtomicInt isCancelled;
-  QSemaphore hasExited;
 
   QList< FTS::FtsHeadword > * foundHeadwords;
 
@@ -149,11 +126,10 @@ public:
       searchString = gd::toQString( Folding::applyDiacriticsOnly( gd::toWString( searchString_ ) ) );
 
     foundHeadwords = new QList< FTS::FtsHeadword >;
-    QThreadPool::globalInstance()->start(
-      new FTSResultsRequestRunnable( *this, hasExited ), -100 );
+    QThreadPool::globalInstance()->start( [ this ]() { this->run(); }, -100 );
   }
 
-  void run(); // Run from another thread by DslResourceRequestRunnable
+  void run();
 
   virtual void cancel()
   {
@@ -165,7 +141,6 @@ public:
     isCancelled.ref();
     if( foundHeadwords )
       delete foundHeadwords;
-    hasExited.acquire();
   }
 };
 
diff --git a/goldendict.pro b/goldendict.pro
index f42b42c6..7ff16554 100644
--- a/goldendict.pro
+++ b/goldendict.pro
@@ -65,6 +65,8 @@ LIBS += \
 
 CONFIG+=utf8_source
 
+CONFIG+=force_debug_info
+
 win32 {
     TARGET = GoldenDict
 
@@ -78,10 +80,7 @@ win32 {
         # silence the warning C4290: C++ exception specification ignored
         QMAKE_CXXFLAGS += /wd4290 /Zc:__cplusplus /std:c++17 /permissive- 
         # QMAKE_LFLAGS_RELEASE += /OPT:REF /OPT:ICF
-        # QMAKE_LFLAGS_RELEASE = /INCREMENTAL:NO /DEBUG
-        CONFIG+=force_debug_info
-        QMAKE_CXXFLAGS_RELEASE = $$QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO
-        QMAKE_LFLAGS_RELEASE = $$QMAKE_LFLAGS_RELEASE_WITH_DEBUGINFO
+
         # QMAKE_CXXFLAGS_RELEASE += /GL # slows down the linking significantly
         LIBS += -lshell32 -luser32 -lsapi -lole32
         Debug: LIBS+= -lhunspelld