diff --git a/scene/gui/dialogs.cpp b/scene/gui/dialogs.cpp
index e2897c2d283..48d8d0618f5 100644
--- a/scene/gui/dialogs.cpp
+++ b/scene/gui/dialogs.cpp
@@ -106,6 +106,8 @@ bool WindowDialog::has_point(const Point2 &p_point) const {
 }
 
 void WindowDialog::_gui_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	Ref<InputEventMouseButton> mb = p_event;
 
 	if (mb.is_valid() && mb->get_button_index() == BUTTON_LEFT) {
diff --git a/scene/gui/file_dialog.cpp b/scene/gui/file_dialog.cpp
index 2709c3a97cf..f9d07d3fd37 100644
--- a/scene/gui/file_dialog.cpp
+++ b/scene/gui/file_dialog.cpp
@@ -78,6 +78,8 @@ void FileDialog::_notification(int p_what) {
 }
 
 void FileDialog::_unhandled_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	Ref<InputEventKey> k = p_event;
 	if (k.is_valid() && is_window_modal_on_top()) {
 		if (k->is_pressed()) {
diff --git a/scene/gui/graph_edit.cpp b/scene/gui/graph_edit.cpp
index 073937e7aab..4895f30be9b 100644
--- a/scene/gui/graph_edit.cpp
+++ b/scene/gui/graph_edit.cpp
@@ -1098,6 +1098,8 @@ void GraphEdit::set_selected(Node *p_child) {
 }
 
 void GraphEdit::_gui_input(const Ref<InputEvent> &p_ev) {
+	ERR_FAIL_COND(p_ev.is_null());
+
 	Ref<InputEventMouseMotion> mm = p_ev;
 	if (mm.is_valid() && (mm->get_button_mask() & BUTTON_MASK_MIDDLE || (mm->get_button_mask() & BUTTON_MASK_LEFT && Input::get_singleton()->is_key_pressed(KEY_SPACE)))) {
 		Vector2i relative = Input::get_singleton()->warp_mouse_motion(mm, get_global_rect());
diff --git a/scene/gui/graph_node.cpp b/scene/gui/graph_node.cpp
index a8735b23e0d..83d1fc729ac 100644
--- a/scene/gui/graph_node.cpp
+++ b/scene/gui/graph_node.cpp
@@ -746,6 +746,8 @@ Color GraphNode::get_connection_output_color(int p_idx) {
 }
 
 void GraphNode::_gui_input(const Ref<InputEvent> &p_ev) {
+	ERR_FAIL_COND(p_ev.is_null());
+
 	Ref<InputEventMouseButton> mb = p_ev;
 	if (mb.is_valid()) {
 		ERR_FAIL_COND_MSG(get_parent_control() == nullptr, "GraphNode must be the child of a GraphEdit node.");
diff --git a/scene/gui/line_edit.cpp b/scene/gui/line_edit.cpp
index ac2c8fdf755..fba315f3281 100644
--- a/scene/gui/line_edit.cpp
+++ b/scene/gui/line_edit.cpp
@@ -49,6 +49,8 @@ static bool _is_text_char(CharType c) {
 }
 
 void LineEdit::_gui_input(Ref<InputEvent> p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	Ref<InputEventMouseButton> b = p_event;
 
 	if (b.is_valid()) {
diff --git a/scene/gui/rich_text_label.cpp b/scene/gui/rich_text_label.cpp
index 34e9d906a8e..bf1b5f40d50 100644
--- a/scene/gui/rich_text_label.cpp
+++ b/scene/gui/rich_text_label.cpp
@@ -1164,6 +1164,8 @@ Control::CursorShape RichTextLabel::get_cursor_shape(const Point2 &p_pos) const
 }
 
 void RichTextLabel::_gui_input(Ref<InputEvent> p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	Ref<InputEventMouseButton> b = p_event;
 
 	if (b.is_valid()) {
diff --git a/scene/gui/scroll_container.cpp b/scene/gui/scroll_container.cpp
index 086eba0d491..53b900800e1 100644
--- a/scene/gui/scroll_container.cpp
+++ b/scene/gui/scroll_container.cpp
@@ -88,6 +88,8 @@ void ScrollContainer::_cancel_drag() {
 }
 
 void ScrollContainer::_gui_input(const Ref<InputEvent> &p_gui_input) {
+	ERR_FAIL_COND(p_gui_input.is_null());
+
 	double prev_v_scroll = v_scroll->get_value();
 	double prev_h_scroll = h_scroll->get_value();
 
diff --git a/scene/gui/slider.cpp b/scene/gui/slider.cpp
index 27dde462c22..fa7445941e4 100644
--- a/scene/gui/slider.cpp
+++ b/scene/gui/slider.cpp
@@ -46,6 +46,8 @@ Size2 Slider::get_minimum_size() const {
 }
 
 void Slider::_gui_input(Ref<InputEvent> p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	if (!editable) {
 		return;
 	}
diff --git a/scene/gui/spin_box.cpp b/scene/gui/spin_box.cpp
index 0fec9399c1e..9c60b736001 100644
--- a/scene/gui/spin_box.cpp
+++ b/scene/gui/spin_box.cpp
@@ -101,6 +101,8 @@ void SpinBox::_release_mouse() {
 }
 
 void SpinBox::_gui_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	if (!is_editable()) {
 		return;
 	}
diff --git a/scene/gui/split_container.cpp b/scene/gui/split_container.cpp
index a5c1af56cd2..99199f5f4d6 100644
--- a/scene/gui/split_container.cpp
+++ b/scene/gui/split_container.cpp
@@ -196,6 +196,8 @@ void SplitContainer::_notification(int p_what) {
 }
 
 void SplitContainer::_gui_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	if (collapsed || !_getch(0) || !_getch(1) || dragger_visibility != DRAGGER_VISIBLE) {
 		return;
 	}
diff --git a/scene/gui/tab_container.cpp b/scene/gui/tab_container.cpp
index 4a42d243151..d458f33a9a4 100644
--- a/scene/gui/tab_container.cpp
+++ b/scene/gui/tab_container.cpp
@@ -69,6 +69,8 @@ int TabContainer::_get_top_margin() const {
 }
 
 void TabContainer::_gui_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	Ref<InputEventMouseButton> mb = p_event;
 
 	Popup *popup = get_popup();
diff --git a/scene/gui/tabs.cpp b/scene/gui/tabs.cpp
index 6526fc781b4..c787a64e395 100644
--- a/scene/gui/tabs.cpp
+++ b/scene/gui/tabs.cpp
@@ -84,6 +84,8 @@ Size2 Tabs::get_minimum_size() const {
 }
 
 void Tabs::_gui_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	Ref<InputEventMouseMotion> mm = p_event;
 
 	if (mm.is_valid()) {
diff --git a/scene/gui/text_edit.cpp b/scene/gui/text_edit.cpp
index 63b83cbb331..78a0851de45 100644
--- a/scene/gui/text_edit.cpp
+++ b/scene/gui/text_edit.cpp
@@ -2402,6 +2402,8 @@ void TextEdit::_get_minimap_mouse_row(const Point2i &p_mouse, int &r_row) const
 }
 
 void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
+	ERR_FAIL_COND(p_gui_input.is_null());
+
 	double prev_v_scroll = v_scroll->get_value();
 	double prev_h_scroll = h_scroll->get_value();
 
diff --git a/scene/main/viewport.cpp b/scene/main/viewport.cpp
index c7a33585b57..ae29e7977d4 100644
--- a/scene/main/viewport.cpp
+++ b/scene/main/viewport.cpp
@@ -1414,6 +1414,8 @@ void Viewport::_vp_input_text(const String &p_text) {
 }
 
 void Viewport::_vp_input(const Ref<InputEvent> &p_ev) {
+	ERR_FAIL_COND(p_ev.is_null());
+
 	if (disable_input) {
 		return;
 	}
@@ -1436,6 +1438,8 @@ void Viewport::_vp_input(const Ref<InputEvent> &p_ev) {
 }
 
 void Viewport::_vp_unhandled_input(const Ref<InputEvent> &p_ev) {
+	ERR_FAIL_COND(p_ev.is_null());
+
 	if (disable_input) {
 		return;
 	}