diff --git a/src/animation/editor/controller_editor.cpp b/src/animation/editor/controller_editor.cpp
index 6e5f1d2376..391596adf5 100644
--- a/src/animation/editor/controller_editor.cpp
+++ b/src/animation/editor/controller_editor.cpp
@@ -911,7 +911,7 @@ struct ControllerEditorImpl : ControllerEditor, AssetBrowser::IPlugin, AssetComp
 					ImGui::Columns();
 					if (ImGuiEx::IconButton(ICON_FA_PLUS_CIRCLE, "Add animation")) {
 						Controller::AnimationEntry& entry = m_controller.m_animation_entries.emplace();
-						entry.animation = nullptr;
+						entry.animation = Path();
 						entry.set = set_idx;
 						entry.slot = 0;
 						saveUndo(true);
diff --git a/src/animation/editor/editor_nodes.cpp b/src/animation/editor/editor_nodes.cpp
index 21f52098b1..a8f036899e 100644
--- a/src/animation/editor/editor_nodes.cpp
+++ b/src/animation/editor/editor_nodes.cpp
@@ -644,8 +644,23 @@ anim::Node* MathNode::compile(anim::Controller& controller) {
 	}
 }
 
+static bool isCompare(anim::NodeType type) {
+	switch (type) {
+		case anim::NodeType::CMP_EQ:
+		case anim::NodeType::CMP_GT:
+		case anim::NodeType::CMP_GTE:
+		case anim::NodeType::CMP_LT:
+		case anim::NodeType::CMP_LTE:
+		case anim::NodeType::CMP_NEQ:
+			return true;
+		default:
+			return false;
+	}
+}
+
 anim::Value::Type MathNode::getReturnType() {
 	ValueNode* input0 = castToValueNode(getInput(0));
+	if (isCompare(m_type)) return anim::Value::BOOL;
 	if (!input0) return anim::Value::NUMBER;
 	return input0->getReturnType();
 }
diff --git a/src/engine/path.cpp b/src/engine/path.cpp
index 3a3211fa00..c3a95b4e61 100644
--- a/src/engine/path.cpp
+++ b/src/engine/path.cpp
@@ -74,12 +74,12 @@ bool Path::operator!=(const char* rhs) const {
 }
 
 bool Path::operator==(const Path& rhs) const {
-	ASSERT(equalIStrings(m_path, rhs.m_path) == (m_hash == rhs.m_hash));
+	ASSERT(equalStrings(m_path, rhs.m_path) == (m_hash == rhs.m_hash));
 	return m_hash == rhs.m_hash;
 }
 
 bool Path::operator!=(const Path& rhs) const {
-	ASSERT(equalIStrings(m_path, rhs.m_path) == (m_hash == rhs.m_hash));
+	ASSERT(equalStrings(m_path, rhs.m_path) == (m_hash == rhs.m_hash));
 	return m_hash != rhs.m_hash;
 }
 
diff --git a/src/engine/string.h b/src/engine/string.h
index 9a7f04b57c..ae4496bf70 100644
--- a/src/engine/string.h
+++ b/src/engine/string.h
@@ -17,7 +17,7 @@ LUMIX_ENGINE_API int stringLength(const char* str);
 
 struct StringView {
 	StringView() {}
-	StringView(const char* str) : begin(str), end(str + stringLength(str)) {}
+	StringView(const char* str) : begin(str), end(str ? str + stringLength(str) : 0) {}
 	StringView(const char* str, u32 len) : begin(str), end(str + len) {}
 	StringView(const char* begin, const char* end) : begin(begin), end(end) {}
 	template <int N> StringView(const StaticString<N>& str);
diff --git a/src/physics/physics_module.cpp b/src/physics/physics_module.cpp
index 6df31cf41e..903a53b1d4 100644
--- a/src/physics/physics_module.cpp
+++ b/src/physics/physics_module.cpp
@@ -457,6 +457,12 @@ struct PhysicsModuleImpl final : PhysicsModule
 		}
 		m_joints.clear();
 
+		// we have to reset mesh of rigid actor before calling m_actors.clear
+		// because ~RigidActor accesses m_actors, which might already contain invalid values in m_actors.clear()
+		for (RigidActor& a : m_actors) {
+			a.setMesh(nullptr);
+		}
+
 		m_actors.clear();
 		m_dynamic_actors.clear();