diff --git a/domain-server/src/DomainServer.cpp b/domain-server/src/DomainServer.cpp
index 57c4692794..8136bf3b53 100644
--- a/domain-server/src/DomainServer.cpp
+++ b/domain-server/src/DomainServer.cpp
@@ -2906,7 +2906,7 @@ void DomainServer::updateReplicationNodes(ReplicationServerDirection direction)
         // collect them in a vector to separately remove them with handleKillNode (since eachNode has a read lock and
         // we cannot recursively take the write lock required by handleKillNode)
         std::vector<SharedNodePointer> nodesToKill;
-        nodeList->eachNode([this, direction, replicationNodesInSettings, replicationDirection, &nodesToKill](const SharedNodePointer& otherNode) {
+        nodeList->eachNode([direction, replicationNodesInSettings, replicationDirection, &nodesToKill](const SharedNodePointer& otherNode) {
             if ((direction == Upstream && NodeType::isUpstream(otherNode->getType()))
                 || (direction == Downstream && NodeType::isDownstream(otherNode->getType()))) {
                 bool nodeInSettings = find(replicationNodesInSettings.cbegin(), replicationNodesInSettings.cend(),
diff --git a/interface/src/Application.cpp b/interface/src/Application.cpp
index f23410bff9..16869dd3d7 100644
--- a/interface/src/Application.cpp
+++ b/interface/src/Application.cpp
@@ -269,7 +269,7 @@ class RenderEventHandler : public QObject {
 public:
     RenderEventHandler() {
         // Transfer to a new thread
-        moveToNewNamedThread(this, "RenderThread", [this](QThread* renderThread) {
+        moveToNewNamedThread(this, "RenderThread", [](QThread* renderThread) {
             hifi::qt::addBlockingForbiddenThread("Render", renderThread);
             qApp->_lastTimeRendered.start();
         }, std::bind(&RenderEventHandler::initialize, this), QThread::HighestPriority);
@@ -1755,7 +1755,13 @@ Application::Application(int& argc, char** argv, QElapsedTimer& startupTimer, bo
     // we can unlock the desktop repositioning code, since all the positions will be
     // relative to the desktop size for this plugin
     auto offscreenUi = DependencyManager::get<OffscreenUi>();
-    offscreenUi->getDesktop()->setProperty("repositionLocked", false);
+    connect(offscreenUi.data(), &OffscreenUi::desktopReady, []() {
+        auto offscreenUi = DependencyManager::get<OffscreenUi>();
+        auto desktop = offscreenUi->getDesktop();
+        if (desktop) {
+            desktop->setProperty("repositionLocked", false);
+        }
+    });
 
     // Make sure we don't time out during slow operations at startup
     updateHeartbeat();
@@ -2309,7 +2315,7 @@ Application::Application(int& argc, char** argv, QElapsedTimer& startupTimer, bo
     QTimer* checkLoginTimer = new QTimer(this);
     checkLoginTimer->setInterval(CHECK_LOGIN_TIMER);
     checkLoginTimer->setSingleShot(true);
-    connect(checkLoginTimer, &QTimer::timeout, this, [this]() {
+    connect(checkLoginTimer, &QTimer::timeout, this, []() {
         auto accountManager = DependencyManager::get<AccountManager>();
         auto dialogsManager = DependencyManager::get<DialogsManager>();
         if (!accountManager->isLoggedIn()) {
@@ -4673,8 +4679,14 @@ void Application::idle() {
 
     checkChangeCursor();
 
-    Stats::getInstance()->updateStats();
-    AnimStats::getInstance()->updateStats();
+    auto stats = Stats::getInstance();
+    if (stats) {
+        stats->updateStats();
+    }
+    auto animStats = AnimStats::getInstance();
+    if (animStats) {
+        animStats->updateStats();
+    }
 
     // Normally we check PipelineWarnings, but since idle will often take more than 10ms we only show these idle timing
     // details if we're in ExtraDebugging mode. However, the ::update() and its subcomponents will show their timing
diff --git a/interface/src/Application_render.cpp b/interface/src/Application_render.cpp
index 6648fa2eb7..a87caeb9a8 100644
--- a/interface/src/Application_render.cpp
+++ b/interface/src/Application_render.cpp
@@ -157,7 +157,10 @@ void Application::paintGL() {
     renderArgs._context->enableStereo(false);
 
     {
-        Stats::getInstance()->setRenderDetails(renderArgs._details);
+        auto stats = Stats::getInstance();
+        if (stats) {
+            stats->setRenderDetails(renderArgs._details);
+        }
     }
 
     uint64_t lastPaintDuration = usecTimestampNow() - lastPaintBegin;
diff --git a/interface/src/raypick/PathPointer.h b/interface/src/raypick/PathPointer.h
index b3638d1f7d..6d5abdeec0 100644
--- a/interface/src/raypick/PathPointer.h
+++ b/interface/src/raypick/PathPointer.h
@@ -27,6 +27,7 @@ class StartEndRenderState {
 public:
     StartEndRenderState() {}
     StartEndRenderState(const OverlayID& startID, const OverlayID& endID);
+    virtual ~StartEndRenderState() {}
 
     const OverlayID& getStartID() const { return _startID; }
     const OverlayID& getEndID() const { return _endID; }
diff --git a/interface/src/scripting/HMDScriptingInterface.h b/interface/src/scripting/HMDScriptingInterface.h
index a8fec839eb..0b18947f76 100644
--- a/interface/src/scripting/HMDScriptingInterface.h
+++ b/interface/src/scripting/HMDScriptingInterface.h
@@ -62,7 +62,6 @@ class HMDScriptingInterface : public AbstractHMDScriptingInterface, public Depen
     Q_OBJECT
     Q_PROPERTY(glm::vec3 position READ getPosition)
     Q_PROPERTY(glm::quat orientation READ getOrientation)
-    Q_PROPERTY(bool mounted READ isMounted NOTIFY mountedChanged)
     Q_PROPERTY(bool showTablet READ getShouldShowTablet)
     Q_PROPERTY(bool tabletContextualMode READ getTabletContextualMode)
     Q_PROPERTY(QUuid tabletID READ getCurrentTabletFrameID WRITE setCurrentTabletFrameID)
@@ -350,7 +349,7 @@ public:
     static QScriptValue getHUDLookAtPosition2D(QScriptContext* context, QScriptEngine* engine);
     static QScriptValue getHUDLookAtPosition3D(QScriptContext* context, QScriptEngine* engine);
 
-    bool isMounted() const;
+    bool isMounted() const override;
 
     void toggleShouldShowTablet();
     void setShouldShowTablet(bool value);
diff --git a/interface/src/ui/OverlayConductor.cpp b/interface/src/ui/OverlayConductor.cpp
index e27001567f..da4fdaba44 100644
--- a/interface/src/ui/OverlayConductor.cpp
+++ b/interface/src/ui/OverlayConductor.cpp
@@ -75,7 +75,14 @@ void OverlayConductor::centerUI() {
 
 void OverlayConductor::update(float dt) {
     auto offscreenUi = DependencyManager::get<OffscreenUi>();
-    bool currentVisible = !offscreenUi->getDesktop()->property("pinned").toBool();
+    if (!offscreenUi) {
+        return;
+    }
+    auto desktop = offscreenUi->getDesktop();
+    if (!desktop) {
+        return;
+    }
+    bool currentVisible = !desktop->property("pinned").toBool();
 
     auto myAvatar = DependencyManager::get<AvatarManager>()->getMyAvatar();
     // centerUI when hmd mode is first enabled and mounted
diff --git a/interface/src/ui/overlays/Text3DOverlay.cpp b/interface/src/ui/overlays/Text3DOverlay.cpp
index fc4b8b9010..40e49ccefd 100644
--- a/interface/src/ui/overlays/Text3DOverlay.cpp
+++ b/interface/src/ui/overlays/Text3DOverlay.cpp
@@ -114,7 +114,6 @@ void Text3DOverlay::render(RenderArgs* args) {
 
     float scaleFactor =  (maxHeight / FIXED_FONT_SCALING_RATIO) * _lineHeight;
 
-    glm::vec2 clipMinimum(0.0f, 0.0f);
     glm::vec2 clipDimensions((dimensions.x - (_leftMargin + _rightMargin)) / scaleFactor,
                              (dimensions.y - (_topMargin + _bottomMargin)) / scaleFactor);
 
@@ -296,4 +295,4 @@ QSizeF Text3DOverlay::textSize(const QString& text) const {
     float pointToWorldScale = (maxHeight / FIXED_FONT_SCALING_RATIO) * _lineHeight;
 
     return QSizeF(extents.x, extents.y) * pointToWorldScale;
-}
\ No newline at end of file
+}
diff --git a/libraries/controllers/src/controllers/InputDevice.h b/libraries/controllers/src/controllers/InputDevice.h
index 1e626e6a3c..6c5cc3a065 100644
--- a/libraries/controllers/src/controllers/InputDevice.h
+++ b/libraries/controllers/src/controllers/InputDevice.h
@@ -98,6 +98,7 @@ enum Hand {
 class InputDevice {
 public:
     InputDevice(const QString& name) : _name(name) {}
+    virtual ~InputDevice() {}
 
     using Pointer = std::shared_ptr<InputDevice>;
 
diff --git a/libraries/controllers/src/controllers/impl/conditionals/AndConditional.h b/libraries/controllers/src/controllers/impl/conditionals/AndConditional.h
index 2299843a24..7d8f08ca1c 100644
--- a/libraries/controllers/src/controllers/impl/conditionals/AndConditional.h
+++ b/libraries/controllers/src/controllers/impl/conditionals/AndConditional.h
@@ -24,6 +24,8 @@ public:
     AndConditional(Conditional::Pointer& first, Conditional::Pointer& second)
         : _children({ first, second }) {}
 
+    virtual ~AndConditional() {}
+
     virtual bool satisfied() override;
 
 private:
diff --git a/libraries/controllers/src/controllers/impl/conditionals/EndpointConditional.h b/libraries/controllers/src/controllers/impl/conditionals/EndpointConditional.h
index 0ba1347087..a6bd7d468d 100644
--- a/libraries/controllers/src/controllers/impl/conditionals/EndpointConditional.h
+++ b/libraries/controllers/src/controllers/impl/conditionals/EndpointConditional.h
@@ -18,6 +18,7 @@ namespace controller {
 class EndpointConditional : public Conditional {
 public:
     EndpointConditional(Endpoint::Pointer endpoint) : _endpoint(endpoint) {}
+    virtual ~EndpointConditional() {}
     virtual bool satisfied() override { return _endpoint && _endpoint->peek() != 0.0f; }
 private:
     Endpoint::Pointer _endpoint;
diff --git a/libraries/controllers/src/controllers/impl/conditionals/NotConditional.h b/libraries/controllers/src/controllers/impl/conditionals/NotConditional.h
index 6b19cf9505..3fcd5f49fc 100644
--- a/libraries/controllers/src/controllers/impl/conditionals/NotConditional.h
+++ b/libraries/controllers/src/controllers/impl/conditionals/NotConditional.h
@@ -19,6 +19,7 @@ namespace controller {
         using Pointer = std::shared_ptr<NotConditional>;
 
         NotConditional(Conditional::Pointer operand) : _operand(operand) { }
+        virtual ~NotConditional() {}
 
         virtual bool satisfied() override;
 
diff --git a/libraries/controllers/src/controllers/impl/filters/ClampFilter.h b/libraries/controllers/src/controllers/impl/filters/ClampFilter.h
index b06a43515f..6eca00fbe2 100644
--- a/libraries/controllers/src/controllers/impl/filters/ClampFilter.h
+++ b/libraries/controllers/src/controllers/impl/filters/ClampFilter.h
@@ -18,6 +18,7 @@ class ClampFilter : public Filter {
     REGISTER_FILTER_CLASS(ClampFilter);
 public:
     ClampFilter(float min = 0.0, float max = 1.0) : _min(min), _max(max) {};
+    virtual ~ClampFilter() {}
     virtual float apply(float value) const override {
         return glm::clamp(value, _min, _max);
     }
diff --git a/libraries/controllers/src/controllers/impl/filters/ConstrainToIntegerFilter.h b/libraries/controllers/src/controllers/impl/filters/ConstrainToIntegerFilter.h
index c9a25fde72..bc90121ab0 100644
--- a/libraries/controllers/src/controllers/impl/filters/ConstrainToIntegerFilter.h
+++ b/libraries/controllers/src/controllers/impl/filters/ConstrainToIntegerFilter.h
@@ -18,6 +18,7 @@ class ConstrainToIntegerFilter : public Filter {
     REGISTER_FILTER_CLASS(ConstrainToIntegerFilter);
 public:
     ConstrainToIntegerFilter() {};
+    virtual ~ConstrainToIntegerFilter() {}
 
     virtual float apply(float value) const override {
         return glm::sign(value);
diff --git a/libraries/controllers/src/controllers/impl/filters/ConstrainToPositiveIntegerFilter.h b/libraries/controllers/src/controllers/impl/filters/ConstrainToPositiveIntegerFilter.h
index e3f4ee8929..accebef851 100644
--- a/libraries/controllers/src/controllers/impl/filters/ConstrainToPositiveIntegerFilter.h
+++ b/libraries/controllers/src/controllers/impl/filters/ConstrainToPositiveIntegerFilter.h
@@ -18,6 +18,7 @@ class ConstrainToPositiveIntegerFilter : public Filter {
     REGISTER_FILTER_CLASS(ConstrainToPositiveIntegerFilter);
 public:
     ConstrainToPositiveIntegerFilter() {};
+    virtual ~ConstrainToPositiveIntegerFilter() {};
 
     virtual float apply(float value) const override {
         return (value <= 0.0f) ? 0.0f : 1.0f;
diff --git a/libraries/controllers/src/controllers/impl/filters/DeadZoneFilter.h b/libraries/controllers/src/controllers/impl/filters/DeadZoneFilter.h
index d898647126..96c60198e2 100644
--- a/libraries/controllers/src/controllers/impl/filters/DeadZoneFilter.h
+++ b/libraries/controllers/src/controllers/impl/filters/DeadZoneFilter.h
@@ -18,6 +18,7 @@ class DeadZoneFilter : public Filter {
     REGISTER_FILTER_CLASS(DeadZoneFilter);
 public:
     DeadZoneFilter(float min = 0.0) : _min(min) {};
+    virtual ~DeadZoneFilter() {}
 
     virtual float apply(float value) const override;
 
diff --git a/libraries/controllers/src/controllers/impl/filters/ExponentialSmoothingFilter.h b/libraries/controllers/src/controllers/impl/filters/ExponentialSmoothingFilter.h
index 134f57243e..5b29b6681a 100644
--- a/libraries/controllers/src/controllers/impl/filters/ExponentialSmoothingFilter.h
+++ b/libraries/controllers/src/controllers/impl/filters/ExponentialSmoothingFilter.h
@@ -20,6 +20,7 @@ namespace controller {
         ExponentialSmoothingFilter() {}
         ExponentialSmoothingFilter(float rotationConstant, float translationConstant) :
             _translationConstant(translationConstant), _rotationConstant(rotationConstant) {}
+        virtual ~ExponentialSmoothingFilter() {}
 
         float apply(float value) const override { return value; }
         Pose apply(Pose value) const override;
diff --git a/libraries/controllers/src/controllers/impl/filters/HysteresisFilter.h b/libraries/controllers/src/controllers/impl/filters/HysteresisFilter.h
index 4eb563754f..4a607d0d5f 100644
--- a/libraries/controllers/src/controllers/impl/filters/HysteresisFilter.h
+++ b/libraries/controllers/src/controllers/impl/filters/HysteresisFilter.h
@@ -18,6 +18,7 @@ class HysteresisFilter : public Filter {
     REGISTER_FILTER_CLASS(HysteresisFilter);
 public:
     HysteresisFilter(float min = 0.25, float max = 0.75);
+    virtual ~HysteresisFilter() {}
     virtual float apply(float value) const override;
 
     virtual Pose apply(Pose value) const override { return value; }
diff --git a/libraries/controllers/src/controllers/impl/filters/InvertFilter.h b/libraries/controllers/src/controllers/impl/filters/InvertFilter.h
index 8acc9d56d6..03b6e9fcb0 100644
--- a/libraries/controllers/src/controllers/impl/filters/InvertFilter.h
+++ b/libraries/controllers/src/controllers/impl/filters/InvertFilter.h
@@ -19,6 +19,7 @@ class InvertFilter : public ScaleFilter {
 public:
     using ScaleFilter::parseParameters;
     InvertFilter() : ScaleFilter(-1.0f) {}
+    virtual ~InvertFilter() {}
 
     virtual bool parseParameters(const QJsonArray& parameters) { return true; }
 
diff --git a/libraries/controllers/src/controllers/impl/filters/LowVelocityFilter.h b/libraries/controllers/src/controllers/impl/filters/LowVelocityFilter.h
index b1c6be1f58..fa75473edf 100644
--- a/libraries/controllers/src/controllers/impl/filters/LowVelocityFilter.h
+++ b/libraries/controllers/src/controllers/impl/filters/LowVelocityFilter.h
@@ -20,6 +20,7 @@ namespace controller {
         LowVelocityFilter() {}
         LowVelocityFilter(float rotationConstant, float translationConstant) :
             _translationConstant(translationConstant), _rotationConstant(rotationConstant) {}
+        virtual ~LowVelocityFilter() {}
 
         float apply(float value) const override { return value; }
         Pose apply(Pose newPose) const override;
diff --git a/libraries/controllers/src/controllers/impl/filters/NotFilter.h b/libraries/controllers/src/controllers/impl/filters/NotFilter.h
index ceb7d29de3..fa52b8e212 100644
--- a/libraries/controllers/src/controllers/impl/filters/NotFilter.h
+++ b/libraries/controllers/src/controllers/impl/filters/NotFilter.h
@@ -10,6 +10,7 @@ class NotFilter : public Filter {
     REGISTER_FILTER_CLASS(NotFilter);
 public:
     NotFilter();
+    virtual ~NotFilter() {}
 
     virtual float apply(float value) const override;
     virtual Pose apply(Pose value) const override { return value; }
diff --git a/libraries/controllers/src/controllers/impl/filters/PostTransformFilter.h b/libraries/controllers/src/controllers/impl/filters/PostTransformFilter.h
index 656a146ff2..1cb9c0a1bd 100644
--- a/libraries/controllers/src/controllers/impl/filters/PostTransformFilter.h
+++ b/libraries/controllers/src/controllers/impl/filters/PostTransformFilter.h
@@ -21,6 +21,7 @@ class PostTransformFilter : public Filter {
 public:
     PostTransformFilter() { }
     PostTransformFilter(glm::mat4 transform) : _transform(transform) {}
+    virtual ~PostTransformFilter() {}
     virtual float apply(float value) const override { return value; }
     virtual Pose apply(Pose value) const override { return value.postTransform(_transform); }
     virtual bool parseParameters(const QJsonValue& parameters) override { return parseMat4Parameter(parameters, _transform); }
diff --git a/libraries/controllers/src/controllers/impl/filters/PulseFilter.h b/libraries/controllers/src/controllers/impl/filters/PulseFilter.h
index a8c7cbf9e6..37cfe34b86 100644
--- a/libraries/controllers/src/controllers/impl/filters/PulseFilter.h
+++ b/libraries/controllers/src/controllers/impl/filters/PulseFilter.h
@@ -20,6 +20,7 @@ class PulseFilter : public Filter {
 public:
     PulseFilter() {}
     PulseFilter(float interval) : _interval(interval) {}
+    virtual ~PulseFilter() {}
 
     virtual float apply(float value) const override;
 
diff --git a/libraries/controllers/src/controllers/impl/filters/RotateFilter.h b/libraries/controllers/src/controllers/impl/filters/RotateFilter.h
index ee2e081393..aecf4f7b7c 100644
--- a/libraries/controllers/src/controllers/impl/filters/RotateFilter.h
+++ b/libraries/controllers/src/controllers/impl/filters/RotateFilter.h
@@ -21,6 +21,7 @@ class RotateFilter : public Filter {
 public:
     RotateFilter() { }
     RotateFilter(glm::quat rotation) : _rotation(rotation) {}
+    virtual ~RotateFilter() {}
 
     virtual float apply(float value) const override { return value; }
 
diff --git a/libraries/controllers/src/controllers/impl/filters/ScaleFilter.h b/libraries/controllers/src/controllers/impl/filters/ScaleFilter.h
index 7b03e2ce48..84f7cb7e47 100644
--- a/libraries/controllers/src/controllers/impl/filters/ScaleFilter.h
+++ b/libraries/controllers/src/controllers/impl/filters/ScaleFilter.h
@@ -21,6 +21,7 @@ class ScaleFilter : public Filter {
 public:
     ScaleFilter() {}
     ScaleFilter(float scale) : _scale(scale) {}
+    virtual ~ScaleFilter() {}
 
     virtual float apply(float value) const override {
         return value * _scale;
diff --git a/libraries/controllers/src/controllers/impl/filters/TransformFilter.h b/libraries/controllers/src/controllers/impl/filters/TransformFilter.h
index 263b70c9b4..ccfa9c6c25 100644
--- a/libraries/controllers/src/controllers/impl/filters/TransformFilter.h
+++ b/libraries/controllers/src/controllers/impl/filters/TransformFilter.h
@@ -21,6 +21,7 @@ class TransformFilter : public Filter {
 public:
     TransformFilter() { }
     TransformFilter(glm::mat4 transform) : _transform(transform) {}
+    virtual ~TransformFilter() {}
 
     virtual float apply(float value) const override { return value; }
     virtual Pose apply(Pose value) const override { return value.transform(_transform); }
diff --git a/libraries/controllers/src/controllers/impl/filters/TranslateFilter.h b/libraries/controllers/src/controllers/impl/filters/TranslateFilter.h
index eda2912a8a..a66e1eb4a4 100644
--- a/libraries/controllers/src/controllers/impl/filters/TranslateFilter.h
+++ b/libraries/controllers/src/controllers/impl/filters/TranslateFilter.h
@@ -21,6 +21,7 @@ class TranslateFilter : public Filter {
 public:
     TranslateFilter() { }
     TranslateFilter(glm::vec3 translate) : _translate(translate) {}
+    virtual ~TranslateFilter() {}
 
     virtual float apply(float value) const override { return value; }
     virtual Pose apply(Pose value) const override { return value.transform(glm::translate(_translate)); }
diff --git a/libraries/display-plugins/src/display-plugins/AbstractHMDScriptingInterface.h b/libraries/display-plugins/src/display-plugins/AbstractHMDScriptingInterface.h
index 7fe58618bc..4234a8731b 100644
--- a/libraries/display-plugins/src/display-plugins/AbstractHMDScriptingInterface.h
+++ b/libraries/display-plugins/src/display-plugins/AbstractHMDScriptingInterface.h
@@ -20,6 +20,7 @@ class AbstractHMDScriptingInterface : public QObject {
     Q_PROPERTY(float eyeHeight READ getEyeHeight)
     Q_PROPERTY(float playerHeight READ getPlayerHeight)
     Q_PROPERTY(float ipdScale READ getIPDScale WRITE setIPDScale NOTIFY IPDScaleChanged)
+    Q_PROPERTY(bool mounted READ isMounted NOTIFY mountedChanged)
 
 public:
     AbstractHMDScriptingInterface();
@@ -29,6 +30,7 @@ public:
     float getIPDScale() const;
     void setIPDScale(float ipdScale);
     bool isHMDMode() const;
+    virtual bool isMounted() const = 0;
 
 signals:
     /**jsdoc
diff --git a/libraries/fbx/src/FBXReader.cpp b/libraries/fbx/src/FBXReader.cpp
index d0efed3df4..dd766f002c 100644
--- a/libraries/fbx/src/FBXReader.cpp
+++ b/libraries/fbx/src/FBXReader.cpp
@@ -1923,7 +1923,6 @@ FBXGeometry* FBXReader::extractFBXGeometry(const QVariantHash& mapping, const QS
     };
 
     // now that all joints have been scanned compute a k-Dop bounding volume of mesh
-    glm::vec3 defaultCapsuleAxis(0.0f, 1.0f, 0.0f);
     for (int i = 0; i < geometry.joints.size(); ++i) {
         FBXJoint& joint = geometry.joints[i];
 
diff --git a/libraries/gpu-gl-common/src/gpu/gl/GLTexture.h b/libraries/gpu-gl-common/src/gpu/gl/GLTexture.h
index a6a38fbcd6..e9a55ad8e2 100644
--- a/libraries/gpu-gl-common/src/gpu/gl/GLTexture.h
+++ b/libraries/gpu-gl-common/src/gpu/gl/GLTexture.h
@@ -25,6 +25,7 @@ struct GLFilterMode {
 
 class GLTextureTransferEngine {
 public:
+    virtual ~GLTextureTransferEngine() {}
     using Pointer = std::shared_ptr<GLTextureTransferEngine>;
     /// Called once per frame to perform any require memory management or transfer work
     virtual void manageMemory() = 0;
diff --git a/libraries/gpu-gl/src/gpu/gl41/GL41BackendTexture.cpp b/libraries/gpu-gl/src/gpu/gl41/GL41BackendTexture.cpp
index 97b1a96a1d..d1b5969793 100644
--- a/libraries/gpu-gl/src/gpu/gl41/GL41BackendTexture.cpp
+++ b/libraries/gpu-gl/src/gpu/gl41/GL41BackendTexture.cpp
@@ -295,7 +295,6 @@ GL41VariableAllocationTexture::GL41VariableAllocationTexture(const std::weak_ptr
     _maxAllocatedMip = _populatedMip = mipLevels;
     _minAllocatedMip = texture.minAvailableMipLevel();
 
-    uvec3 mipDimensions;
     for (uint16_t mip = _minAllocatedMip; mip < mipLevels; ++mip) {
         if (glm::all(glm::lessThanEqual(texture.evalMipDimensions(mip), INITIAL_MIP_TRANSFER_DIMENSIONS))) {
             _maxAllocatedMip = _populatedMip = mip;
diff --git a/libraries/gpu-gl/src/gpu/gl45/GL45BackendVariableTexture.cpp b/libraries/gpu-gl/src/gpu/gl45/GL45BackendVariableTexture.cpp
index 4689163a47..f53eff637d 100644
--- a/libraries/gpu-gl/src/gpu/gl45/GL45BackendVariableTexture.cpp
+++ b/libraries/gpu-gl/src/gpu/gl45/GL45BackendVariableTexture.cpp
@@ -85,7 +85,6 @@ GL45ResourceTexture::GL45ResourceTexture(const std::weak_ptr<GLBackend>& backend
     _maxAllocatedMip = _populatedMip = mipLevels;
     _minAllocatedMip = texture.minAvailableMipLevel();
 
-    uvec3 mipDimensions;
     for (uint16_t mip = _minAllocatedMip; mip < mipLevels; ++mip) {
         if (glm::all(glm::lessThanEqual(texture.evalMipDimensions(mip), INITIAL_MIP_TRANSFER_DIMENSIONS))) {
             _maxAllocatedMip = _populatedMip = mip;
diff --git a/libraries/gpu/src/gpu/State.h b/libraries/gpu/src/gpu/State.h
index 385edec277..6e29900c03 100755
--- a/libraries/gpu/src/gpu/State.h
+++ b/libraries/gpu/src/gpu/State.h
@@ -118,6 +118,7 @@ public:
         uint8 _function = LESS;
         uint8 _writeMask = true;
         uint8 _enabled = false;
+        __attribute__((unused)) // _spare is here to to affect alignment
         uint8 _spare = 0;
     public:
         DepthTest(bool enabled = false, bool writeMask = true, ComparisonFunction func = LESS) :
diff --git a/libraries/input-plugins/src/input-plugins/KeyboardMouseDevice.h b/libraries/input-plugins/src/input-plugins/KeyboardMouseDevice.h
index b94acb8b71..ce2bea0853 100644
--- a/libraries/input-plugins/src/input-plugins/KeyboardMouseDevice.h
+++ b/libraries/input-plugins/src/input-plugins/KeyboardMouseDevice.h
@@ -96,6 +96,7 @@ protected:
     class InputDevice : public controller::InputDevice {
     public:
         InputDevice() : controller::InputDevice("Keyboard") {}
+        virtual ~InputDevice() {}
     private:
         // Device functions
         virtual controller::Input::NamedVector getAvailableInputs() const override;
diff --git a/libraries/model-networking/src/model-networking/ModelCache.h b/libraries/model-networking/src/model-networking/ModelCache.h
index eea6c93786..dfe26788f2 100644
--- a/libraries/model-networking/src/model-networking/ModelCache.h
+++ b/libraries/model-networking/src/model-networking/ModelCache.h
@@ -36,6 +36,7 @@ public:
 
     Geometry() = default;
     Geometry(const Geometry& geometry);
+    virtual ~Geometry() {}
 
     // Immutable over lifetime
     using GeometryMeshes = std::vector<std::shared_ptr<const graphics::Mesh>>;
diff --git a/libraries/plugins/src/plugins/InputPlugin.h b/libraries/plugins/src/plugins/InputPlugin.h
index 23fbb6cac6..344f07d64c 100644
--- a/libraries/plugins/src/plugins/InputPlugin.h
+++ b/libraries/plugins/src/plugins/InputPlugin.h
@@ -19,6 +19,7 @@ namespace controller {
 
 class InputPlugin : public Plugin {
 public:
+    virtual ~InputPlugin() {}
     virtual void pluginFocusOutEvent() = 0;
     virtual void pluginUpdate(float deltaTime, const controller::InputCalibrationData& inputCalibrationData) = 0;
 
diff --git a/libraries/pointers/src/Pick.h b/libraries/pointers/src/Pick.h
index 099a791407..1703f6598f 100644
--- a/libraries/pointers/src/Pick.h
+++ b/libraries/pointers/src/Pick.h
@@ -109,6 +109,7 @@ class PickResult {
 public:
     PickResult() {}
     PickResult(const QVariantMap& pickVariant) : pickVariant(pickVariant) {}
+    virtual ~PickResult() {}
 
     virtual QVariantMap toVariantMap() const {
         return pickVariant;
@@ -233,6 +234,7 @@ template<typename T>
 class Pick : public PickQuery {
 public:
     Pick(const PickFilter& filter, const float maxDistance, const bool enabled) : PickQuery(filter, maxDistance, enabled) {}
+    virtual ~Pick() {}
 
     virtual T getMathematicalPick() const = 0;
     virtual PickResultPointer getDefaultResult(const QVariantMap& pickVariant) const = 0;
diff --git a/libraries/render-utils/src/MeshPartPayload.h b/libraries/render-utils/src/MeshPartPayload.h
index 5c7177e890..0cbe082cb5 100644
--- a/libraries/render-utils/src/MeshPartPayload.h
+++ b/libraries/render-utils/src/MeshPartPayload.h
@@ -28,6 +28,7 @@ class MeshPartPayload {
 public:
     MeshPartPayload() {}
     MeshPartPayload(const std::shared_ptr<const graphics::Mesh>& mesh, int partIndex, graphics::MaterialPointer material);
+    virtual ~MeshPartPayload() {}
 
     typedef render::Payload<MeshPartPayload> Payload;
     typedef Payload::DataPointer Pointer;
diff --git a/libraries/render/src/render/DrawSceneOctree.cpp b/libraries/render/src/render/DrawSceneOctree.cpp
index 6c87d2f56b..b10c3fef8d 100644
--- a/libraries/render/src/render/DrawSceneOctree.cpp
+++ b/libraries/render/src/render/DrawSceneOctree.cpp
@@ -88,7 +88,7 @@ void DrawSceneOctree::run(const RenderContextPointer& renderContext, const ItemS
         batch.setInputFormat(_cellBoundsFormat);
 
         std::vector<ivec4> cellBounds;
-        auto drawCellBounds = [this, &cellBounds, &scene, &batch](const std::vector<gpu::Stamp>& cells) {
+        auto drawCellBounds = [this, &cellBounds, &scene](const std::vector<gpu::Stamp>& cells) {
             cellBounds.reserve(cellBounds.size() + cells.size());
             for (const auto& cellID : cells) {
                 auto cell = scene->getSpatialTree().getConcreteCell(cellID);
diff --git a/libraries/render/src/render/Item.h b/libraries/render/src/render/Item.h
index 5ecfba2da8..88e85c604a 100644
--- a/libraries/render/src/render/Item.h
+++ b/libraries/render/src/render/Item.h
@@ -531,6 +531,7 @@ public:
     typedef UpdateFunctor<T> Updater;
 
     Payload(const DataPointer& data) : _data(data) {}
+    virtual ~Payload() {}
 
     // Payload general interface
     virtual const ItemKey getKey() const override { return payloadGetKey<T>(_data); }
diff --git a/libraries/shared/src/PointerEvent.cpp b/libraries/shared/src/PointerEvent.cpp
index fb855922c2..422f2dfb20 100644
--- a/libraries/shared/src/PointerEvent.cpp
+++ b/libraries/shared/src/PointerEvent.cpp
@@ -229,16 +229,9 @@ void PointerEvent::fromScriptValue(const QScriptValue& object, PointerEvent& eve
         QScriptValue id = object.property("id");
         event._id = id.isNumber() ? (uint32_t)id.toNumber() : 0;
 
-        glm::vec2 pos2D;
         vec2FromScriptValue(object.property("pos2D"), event._pos2D);
-
-        glm::vec3 pos3D;
         vec3FromScriptValue(object.property("pos3D"), event._pos3D);
-
-        glm::vec3 normal;
         vec3FromScriptValue(object.property("normal"), event._normal);
-
-        glm::vec3 direction;
         vec3FromScriptValue(object.property("direction"), event._direction);
 
         QScriptValue button = object.property("button");
diff --git a/libraries/shared/src/PrioritySortUtil.h b/libraries/shared/src/PrioritySortUtil.h
index 27f6b193ba..4a74c5d212 100644
--- a/libraries/shared/src/PrioritySortUtil.h
+++ b/libraries/shared/src/PrioritySortUtil.h
@@ -29,6 +29,7 @@ namespace PrioritySortUtil {
 
     class Sortable {
     public:
+        virtual ~Sortable() {}
         virtual glm::vec3 getPosition() const = 0;
         virtual float getRadius() const = 0;
         virtual uint64_t getTimestamp() const = 0;
diff --git a/libraries/shared/src/TransformNode.h b/libraries/shared/src/TransformNode.h
index 73223a8cee..1c10bed1c0 100644
--- a/libraries/shared/src/TransformNode.h
+++ b/libraries/shared/src/TransformNode.h
@@ -12,7 +12,8 @@
 
 class TransformNode {
 public:
+    virtual ~TransformNode() {}
     virtual Transform getTransform() = 0;
 };
 
-#endif // hifi_TransformNode_h
\ No newline at end of file
+#endif // hifi_TransformNode_h
diff --git a/libraries/task/src/task/Task.h b/libraries/task/src/task/Task.h
index 60ccd26b70..3878c5719b 100644
--- a/libraries/task/src/task/Task.h
+++ b/libraries/task/src/task/Task.h
@@ -174,7 +174,8 @@ public:
     template <class T, class O, class C = Config> using ModelO = Model<T, C, None, O>;
     template <class T, class I, class O, class C = Config> using ModelIO = Model<T, C, I, O>;
 
-    Job(ConceptPointer concept) : _concept(concept) {}
+    Job(const ConceptPointer& concept) : _concept(concept) {}
+    virtual ~Job() {}
 
     const std::string& getName() const { return _concept->getName(); }
     const Varying getInput() const { return _concept->getInput(); }
diff --git a/libraries/ui/src/OffscreenUi.cpp b/libraries/ui/src/OffscreenUi.cpp
index d82cfbbf3f..7579de256c 100644
--- a/libraries/ui/src/OffscreenUi.cpp
+++ b/libraries/ui/src/OffscreenUi.cpp
@@ -205,9 +205,12 @@ bool OffscreenUi::isPointOnDesktopWindow(QVariant point) {
 }
 
 void OffscreenUi::hide(const QString& name) {
-    QQuickItem* item = getRootItem()->findChild<QQuickItem*>(name);
-    if (item) {
-        QQmlProperty(item, OFFSCREEN_VISIBILITY_PROPERTY).write(false);
+    auto rootItem = getRootItem();
+    if (rootItem) {
+        QQuickItem* item = getRootItem()->findChild<QQuickItem*>(name);
+        if (item) {
+            QQmlProperty(item, OFFSCREEN_VISIBILITY_PROPERTY).write(false);
+        }
     }
 }
 
@@ -672,6 +675,7 @@ void OffscreenUi::createDesktop(const QUrl& url) {
 
         new KeyboardFocusHack();
         connect(_desktop, SIGNAL(showDesktop()), this, SIGNAL(showDesktop()));
+        emit desktopReady();
     });
 }
 
diff --git a/libraries/ui/src/OffscreenUi.h b/libraries/ui/src/OffscreenUi.h
index 26f9f58dd5..fbf7068b1c 100644
--- a/libraries/ui/src/OffscreenUi.h
+++ b/libraries/ui/src/OffscreenUi.h
@@ -243,6 +243,8 @@ signals:
 //    void fileDialogResponse(QString response);
 //    void assetDialogResponse(QString response);
 //    void inputDialogResponse(QVariant response);
+    void desktopReady();
+
 public slots:
     void removeModalDialog(QObject* modal);
 
diff --git a/libraries/workload/src/workload/Transaction.h b/libraries/workload/src/workload/Transaction.h
index 22328cf4b1..2bad911e4b 100644
--- a/libraries/workload/src/workload/Transaction.h
+++ b/libraries/workload/src/workload/Transaction.h
@@ -135,7 +135,7 @@ typedef std::vector<Transaction> TransactionQueue;
 class Collection {
 public:
     Collection();
-    ~Collection();
+    virtual ~Collection();
 
     virtual void clear();
 
diff --git a/tests-manual/gpu-textures/src/main.cpp b/tests-manual/gpu-textures/src/main.cpp
index 3d0051dc1d..70846b13b1 100644
--- a/tests-manual/gpu-textures/src/main.cpp
+++ b/tests-manual/gpu-textures/src/main.cpp
@@ -85,14 +85,12 @@ class MyTestWindow : public TestWindow {
 
     void updateCamera() {
         float t = _time.elapsed() * 1e-3f;
-        glm::vec3 unitscale{ 1.0f };
         glm::vec3 up{ 0.0f, 1.0f, 0.0f };
 
         float distance = 3.0f;
         glm::vec3 camera_position{ distance * sinf(t), 0.5f, distance * cosf(t) };
 
         static const vec3 camera_focus(0);
-        static const vec3 camera_up(0, 1, 0);
         _camera = glm::inverse(glm::lookAt(camera_position, camera_focus, up));
 
         ViewFrustum frustum;
diff --git a/tests-manual/gpu/src/main.cpp b/tests-manual/gpu/src/main.cpp
index 41d84ca026..f36e6a9abd 100644
--- a/tests-manual/gpu/src/main.cpp
+++ b/tests-manual/gpu/src/main.cpp
@@ -102,14 +102,12 @@ class MyTestWindow : public TestWindow {
 #ifdef INTERACTIVE
         t = _time.elapsed() * 1e-3f;
 #endif
-        glm::vec3 unitscale { 1.0f };
         glm::vec3 up { 0.0f, 1.0f, 0.0f };
 
         float distance = 3.0f;
         glm::vec3 camera_position { distance * sinf(t), 0.5f, distance * cosf(t) };
 
         static const vec3 camera_focus(0);
-        static const vec3 camera_up(0, 1, 0);
         _camera = glm::inverse(glm::lookAt(camera_position, camera_focus, up));
 
         ViewFrustum frustum;