diff --git a/common/gal/opengl/antialiasing.cpp b/common/gal/opengl/antialiasing.cpp
index f32be0b724..13dabd6ff5 100644
--- a/common/gal/opengl/antialiasing.cpp
+++ b/common/gal/opengl/antialiasing.cpp
@@ -127,8 +127,8 @@ namespace {
 
 ANTIALIASING_SUPERSAMPLING::ANTIALIASING_SUPERSAMPLING( OPENGL_COMPOSITOR* aCompositor,
     SUPERSAMPLING_MODE aMode )
-    : compositor( aCompositor ), mode( aMode ), areBuffersCreated( false ),
-    areShadersCreated( false )
+    : compositor( aCompositor ), mode( aMode ), ssaaMainBuffer( 0 ),
+    areBuffersCreated( false ), areShadersCreated( false )
 {
 }
 
@@ -234,6 +234,15 @@ ANTIALIASING_SMAA::ANTIALIASING_SMAA( OPENGL_COMPOSITOR* aCompositor, SMAA_QUALI
     : areBuffersInitialized( false ), shadersLoaded( false ),
     quality( aQuality ), compositor( aCompositor )
 {
+    smaaBaseBuffer = 0;
+    smaaEdgesBuffer = 0;
+    smaaBlendBuffer = 0;
+    smaaAreaTex = 0;
+    smaaSearchTex = 0;
+
+    pass_1_metrics = 0;
+    pass_2_metrics = 0;
+    pass_3_metrics = 0;
 }
 
 
diff --git a/common/gal/opengl/antialiasing.h b/common/gal/opengl/antialiasing.h
index e99186f29f..e3be899bef 100644
--- a/common/gal/opengl/antialiasing.h
+++ b/common/gal/opengl/antialiasing.h
@@ -35,6 +35,10 @@ namespace KIGFX {
     class OPENGL_PRESENTOR
     {
     public:
+        virtual ~OPENGL_PRESENTOR()
+        {
+        }
+
         virtual bool Init() = 0;
         virtual unsigned int CreateBuffer() = 0;
 
diff --git a/common/gal/opengl/opengl_compositor.cpp b/common/gal/opengl/opengl_compositor.cpp
index a91dc2c337..aeb5c76e00 100644
--- a/common/gal/opengl/opengl_compositor.cpp
+++ b/common/gal/opengl/opengl_compositor.cpp
@@ -38,7 +38,8 @@ using namespace KIGFX;
 
 OPENGL_COMPOSITOR::OPENGL_COMPOSITOR() :
     m_initialized( false ), m_curBuffer( 0 ),
-    m_mainFbo( 0 ), m_depthBuffer( 0 ), m_curFbo( DIRECT_RENDERING )
+    m_mainFbo( 0 ), m_depthBuffer( 0 ), m_curFbo( DIRECT_RENDERING ),
+    m_currentAntialiasingMode( OPENGL_ANTIALIASING_MODE::NONE )
 {
     m_antialiasing.reset( new ANTIALIASING_NONE( this ) );
 }
diff --git a/common/observable.cpp b/common/observable.cpp
index fe788900c3..b172a75fc9 100644
--- a/common/observable.cpp
+++ b/common/observable.cpp
@@ -28,7 +28,7 @@ namespace UTIL {
 
     namespace DETAIL {
 
-        template< typename T >
+        template<typename T>
         struct equals {
             equals( const T& val ) : val_( val ) {}
 
@@ -96,6 +96,12 @@ namespace UTIL {
         {
             auto it = std::find( observers_.begin(), observers_.end(), observer );
 
+            if( it == observers_.end() )
+            {
+                assert( false );
+                return;
+            }
+
             if( is_iterating() )
                 *it = nullptr;
             else
@@ -112,6 +118,7 @@ namespace UTIL {
 
 
     LINK::LINK()
+        : observer_( nullptr )
     {
     }
 
diff --git a/pcbnew/pcb_painter.cpp b/pcbnew/pcb_painter.cpp
index 3235abbccb..f46bf85fdc 100644
--- a/pcbnew/pcb_painter.cpp
+++ b/pcbnew/pcb_painter.cpp
@@ -49,6 +49,7 @@ PCB_RENDER_SETTINGS::PCB_RENDER_SETTINGS()
     m_netNamesOnPads = true;
     m_netNamesOnTracks = true;
     m_displayZone = DZ_SHOW_FILLED;
+    m_clearance = CL_NONE;
 
     // By default everything should be displayed as filled
     for( unsigned int i = 0; i < TOTAL_LAYER_COUNT; ++i )
diff --git a/pcbnew/router/pns_kicad_iface.cpp b/pcbnew/router/pns_kicad_iface.cpp
index 7ce848b7c6..5816ce9588 100644
--- a/pcbnew/router/pns_kicad_iface.cpp
+++ b/pcbnew/router/pns_kicad_iface.cpp
@@ -454,6 +454,7 @@ PNS_KICAD_IFACE::PNS_KICAD_IFACE()
     m_world = nullptr;
     m_router = nullptr;
     m_debugDecorator = nullptr;
+    m_dispOptions = nullptr;
 }