diff --git a/editor/animation_bezier_editor.cpp b/editor/animation_bezier_editor.cpp
index 92b46830189..ab8ae719047 100644
--- a/editor/animation_bezier_editor.cpp
+++ b/editor/animation_bezier_editor.cpp
@@ -602,6 +602,8 @@ void AnimationBezierTrackEdit::_select_at_anim(const Ref<Animation> &p_anim, int
 }
 
 void AnimationBezierTrackEdit::_gui_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	if (p_event->is_pressed()) {
 		if (ED_GET_SHORTCUT("animation_editor/duplicate_selection")->is_shortcut(p_event)) {
 			duplicate_selection();
diff --git a/editor/animation_track_editor.cpp b/editor/animation_track_editor.cpp
index 4274fb993ff..4fe2d2bb2a1 100644
--- a/editor/animation_track_editor.cpp
+++ b/editor/animation_track_editor.cpp
@@ -1641,6 +1641,8 @@ void AnimationTimelineEdit::_play_position_draw() {
 }
 
 void AnimationTimelineEdit::_gui_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	Ref<InputEventMouseButton> mb = p_event;
 
 	if (mb.is_valid() && mb->is_pressed() && mb->get_button_index() == MOUSE_BUTTON_LEFT && hsize_rect.has_point(mb->get_position())) {
@@ -2522,6 +2524,8 @@ String AnimationTrackEdit::get_tooltip(const Point2 &p_pos) const {
 }
 
 void AnimationTrackEdit::_gui_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	if (p_event->is_pressed()) {
 		if (ED_GET_SHORTCUT("animation_editor/duplicate_selection")->is_shortcut(p_event)) {
 			emit_signal("duplicate_request");
diff --git a/editor/animation_track_editor_plugins.cpp b/editor/animation_track_editor_plugins.cpp
index 1028d34fb23..506a327ffc5 100644
--- a/editor/animation_track_editor_plugins.cpp
+++ b/editor/animation_track_editor_plugins.cpp
@@ -1036,6 +1036,8 @@ void AnimationTrackEditTypeAudio::drop_data(const Point2 &p_point, const Variant
 }
 
 void AnimationTrackEditTypeAudio::_gui_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	Ref<InputEventMouseMotion> mm = p_event;
 	if (!len_resizing && mm.is_valid()) {
 		bool use_hsize_cursor = false;
diff --git a/editor/code_editor.cpp b/editor/code_editor.cpp
index 11be365f0ac..ac8bef817b4 100644
--- a/editor/code_editor.cpp
+++ b/editor/code_editor.cpp
@@ -109,6 +109,8 @@ void FindReplaceBar::_notification(int p_what) {
 }
 
 void FindReplaceBar::_unhandled_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	Ref<InputEventKey> k = p_event;
 	if (!k.is_valid() || !k->is_pressed()) {
 		return;
@@ -691,6 +693,8 @@ FindReplaceBar::FindReplaceBar() {
 // This function should be used to handle shortcuts that could otherwise
 // be handled too late if they weren't handled here.
 void CodeTextEditor::_input(const Ref<InputEvent> &event) {
+	ERR_FAIL_COND(event.is_null());
+
 	const Ref<InputEventKey> key_event = event;
 	if (!key_event.is_valid() || !key_event->is_pressed() || !text_editor->has_focus()) {
 		return;
diff --git a/editor/editor_audio_buses.cpp b/editor/editor_audio_buses.cpp
index 3a5ebe8e851..e7934bed0a3 100644
--- a/editor/editor_audio_buses.cpp
+++ b/editor/editor_audio_buses.cpp
@@ -531,6 +531,8 @@ void EditorAudioBus::_effect_add(int p_which) {
 }
 
 void EditorAudioBus::_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() == MOUSE_BUTTON_RIGHT && mb->is_pressed()) {
 		Vector2 pos = Vector2(mb->get_position().x, mb->get_position().y);
diff --git a/editor/editor_file_dialog.cpp b/editor/editor_file_dialog.cpp
index f78da9569fb..75815fa7507 100644
--- a/editor/editor_file_dialog.cpp
+++ b/editor/editor_file_dialog.cpp
@@ -125,6 +125,8 @@ void EditorFileDialog::_notification(int p_what) {
 }
 
 void EditorFileDialog::_unhandled_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	Ref<InputEventKey> k = p_event;
 
 	if (k.is_valid()) {
diff --git a/editor/editor_help.cpp b/editor/editor_help.cpp
index 283713cd3c7..a747652a2f6 100644
--- a/editor/editor_help.cpp
+++ b/editor/editor_help.cpp
@@ -1908,6 +1908,8 @@ void FindBar::_hide_bar() {
 }
 
 void FindBar::_unhandled_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	Ref<InputEventKey> k = p_event;
 	if (k.is_valid()) {
 		if (k->is_pressed() && (rich_text_label->has_focus() || is_a_parent_of(get_focus_owner()))) {
diff --git a/editor/editor_inspector.cpp b/editor/editor_inspector.cpp
index 70d1a514b5c..236e0f1abbc 100644
--- a/editor/editor_inspector.cpp
+++ b/editor/editor_inspector.cpp
@@ -682,6 +682,8 @@ bool EditorProperty::is_selected() const {
 }
 
 void EditorProperty::_gui_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	if (property == StringName()) {
 		return;
 	}
@@ -1354,6 +1356,8 @@ void EditorInspectorSection::setup(const String &p_section, const String &p_labe
 }
 
 void EditorInspectorSection::_gui_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	if (!foldable) {
 		return;
 	}
diff --git a/editor/editor_node.cpp b/editor/editor_node.cpp
index 21f1d053048..cc9080c923d 100644
--- a/editor/editor_node.cpp
+++ b/editor/editor_node.cpp
@@ -390,6 +390,8 @@ void EditorNode::_update_title() {
 }
 
 void EditorNode::_unhandled_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	Ref<InputEventKey> k = p_event;
 	if (k.is_valid() && k->is_pressed() && !k->is_echo()) {
 		EditorPlugin *old_editor = editor_plugin_screen;
diff --git a/editor/editor_spin_slider.cpp b/editor/editor_spin_slider.cpp
index c09d78826ca..8577ccb9db8 100644
--- a/editor/editor_spin_slider.cpp
+++ b/editor/editor_spin_slider.cpp
@@ -47,6 +47,8 @@ String EditorSpinSlider::get_text_value() const {
 }
 
 void EditorSpinSlider::_gui_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	if (read_only) {
 		return;
 	}
diff --git a/editor/plugins/animation_player_editor_plugin.cpp b/editor/plugins/animation_player_editor_plugin.cpp
index 03481dfb38f..612a8f30a48 100644
--- a/editor/plugins/animation_player_editor_plugin.cpp
+++ b/editor/plugins/animation_player_editor_plugin.cpp
@@ -1219,6 +1219,8 @@ void AnimationPlayerEditor::_onion_skinning_menu(int p_option) {
 }
 
 void AnimationPlayerEditor::_unhandled_key_input(const Ref<InputEvent> &p_ev) {
+	ERR_FAIL_COND(p_ev.is_null());
+
 	Ref<InputEventKey> k = p_ev;
 	if (is_visible_in_tree() && k.is_valid() && k->is_pressed() && !k->is_echo() && !k->get_alt() && !k->get_control() && !k->get_metakey()) {
 		switch (k->get_keycode()) {
diff --git a/editor/plugins/asset_library_editor_plugin.cpp b/editor/plugins/asset_library_editor_plugin.cpp
index 1345adc8ee6..9f29641692b 100644
--- a/editor/plugins/asset_library_editor_plugin.cpp
+++ b/editor/plugins/asset_library_editor_plugin.cpp
@@ -606,6 +606,8 @@ void EditorAssetLibrary::_update_repository_options() {
 }
 
 void EditorAssetLibrary::_unhandled_key_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	const Ref<InputEventKey> key = p_event;
 
 	if (key.is_valid() && key->is_pressed()) {
diff --git a/editor/plugins/canvas_item_editor_plugin.cpp b/editor/plugins/canvas_item_editor_plugin.cpp
index d4e06aa9caf..b678197037a 100644
--- a/editor/plugins/canvas_item_editor_plugin.cpp
+++ b/editor/plugins/canvas_item_editor_plugin.cpp
@@ -472,6 +472,8 @@ float CanvasItemEditor::snap_angle(float p_target, float p_start) const {
 }
 
 void CanvasItemEditor::_unhandled_key_input(const Ref<InputEvent> &p_ev) {
+	ERR_FAIL_COND(p_ev.is_null());
+
 	Ref<InputEventKey> k = p_ev;
 
 	if (!is_visible_in_tree()) {
diff --git a/editor/plugins/mesh_editor_plugin.cpp b/editor/plugins/mesh_editor_plugin.cpp
index 77719104b13..9d29c315223 100644
--- a/editor/plugins/mesh_editor_plugin.cpp
+++ b/editor/plugins/mesh_editor_plugin.cpp
@@ -33,6 +33,8 @@
 #include "editor/editor_scale.h"
 
 void MeshEditor::_gui_input(Ref<InputEvent> p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	Ref<InputEventMouseMotion> mm = p_event;
 	if (mm.is_valid() && mm->get_button_mask() & MOUSE_BUTTON_MASK_LEFT) {
 		rot_x -= mm->get_relative().y * 0.01;
diff --git a/editor/plugins/node_3d_editor_plugin.cpp b/editor/plugins/node_3d_editor_plugin.cpp
index 81c59fc0a93..0ab5d216185 100644
--- a/editor/plugins/node_3d_editor_plugin.cpp
+++ b/editor/plugins/node_3d_editor_plugin.cpp
@@ -185,6 +185,8 @@ void ViewportRotationControl::_get_sorted_axis(Vector<Axis2D> &r_axis) {
 }
 
 void ViewportRotationControl::_gui_input(Ref<InputEvent> p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	const Ref<InputEventMouseButton> mb = p_event;
 	if (mb.is_valid() && mb->get_button_index() == MOUSE_BUTTON_LEFT) {
 		Vector2 pos = mb->get_position();
@@ -4192,6 +4194,8 @@ Node3DEditorViewport::~Node3DEditorViewport() {
 //////////////////////////////////////////////////////////////
 
 void Node3DEditorViewportContainer::_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() == MOUSE_BUTTON_LEFT) {
@@ -6159,6 +6163,8 @@ void Node3DEditor::snap_selected_nodes_to_floor() {
 }
 
 void Node3DEditor::_unhandled_key_input(Ref<InputEvent> p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	if (!is_visible_in_tree()) {
 		return;
 	}
diff --git a/editor/plugins/script_editor_plugin.cpp b/editor/plugins/script_editor_plugin.cpp
index b2984744068..58e6717a3d9 100644
--- a/editor/plugins/script_editor_plugin.cpp
+++ b/editor/plugins/script_editor_plugin.cpp
@@ -2706,6 +2706,8 @@ void ScriptEditor::drop_data_fw(const Point2 &p_point, const Variant &p_data, Co
 }
 
 void ScriptEditor::_unhandled_key_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	if (!is_visible_in_tree() || !p_event->is_pressed() || p_event->is_echo()) {
 		return;
 	}
diff --git a/editor/plugins/texture_layered_editor_plugin.cpp b/editor/plugins/texture_layered_editor_plugin.cpp
index 265d4ccc1e6..89ed98d53e6 100644
--- a/editor/plugins/texture_layered_editor_plugin.cpp
+++ b/editor/plugins/texture_layered_editor_plugin.cpp
@@ -35,6 +35,8 @@
 #include "editor/editor_settings.h"
 
 void TextureLayeredEditor::_gui_input(Ref<InputEvent> p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	Ref<InputEventMouseMotion> mm = p_event;
 	if (mm.is_valid() && mm->get_button_mask() & MOUSE_BUTTON_MASK_LEFT) {
 		y_rot += -mm->get_relative().x * 0.01;
diff --git a/editor/project_manager.cpp b/editor/project_manager.cpp
index eda9499783a..58f48571b19 100644
--- a/editor/project_manager.cpp
+++ b/editor/project_manager.cpp
@@ -1882,6 +1882,8 @@ void ProjectManager::_update_project_buttons() {
 }
 
 void ProjectManager::_unhandled_key_input(const Ref<InputEvent> &p_ev) {
+	ERR_FAIL_COND(p_ev.is_null());
+
 	Ref<InputEventKey> k = p_ev;
 
 	if (k.is_valid()) {
diff --git a/editor/scene_tree_dock.cpp b/editor/scene_tree_dock.cpp
index 57d517b7e9d..c62e9cbe5fd 100644
--- a/editor/scene_tree_dock.cpp
+++ b/editor/scene_tree_dock.cpp
@@ -61,6 +61,8 @@ void SceneTreeDock::_quick_open() {
 }
 
 void SceneTreeDock::_input(Ref<InputEvent> p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	Ref<InputEventMouseButton> mb = p_event;
 
 	if (mb.is_valid() && !mb->is_pressed() && mb->get_button_index() == MOUSE_BUTTON_LEFT) {
@@ -69,6 +71,8 @@ void SceneTreeDock::_input(Ref<InputEvent> p_event) {
 }
 
 void SceneTreeDock::_unhandled_key_input(Ref<InputEvent> p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	if (get_focus_owner() && get_focus_owner()->is_text_field()) {
 		return;
 	}
diff --git a/editor/settings_config_dialog.cpp b/editor/settings_config_dialog.cpp
index 3852c389c7f..3be2136a20f 100644
--- a/editor/settings_config_dialog.cpp
+++ b/editor/settings_config_dialog.cpp
@@ -139,6 +139,8 @@ void EditorSettingsDialog::_notification(int p_what) {
 }
 
 void EditorSettingsDialog::_unhandled_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	const Ref<InputEventKey> k = p_event;
 
 	if (k.is_valid() && k->is_pressed()) {
diff --git a/modules/visual_script/visual_script_editor.cpp b/modules/visual_script/visual_script_editor.cpp
index d520837d43b..4cc238e69a3 100644
--- a/modules/visual_script/visual_script_editor.cpp
+++ b/modules/visual_script/visual_script_editor.cpp
@@ -1826,6 +1826,8 @@ void VisualScriptEditor::_generic_search(String p_base_type, Vector2 pos, bool n
 }
 
 void VisualScriptEditor::_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	// GUI input for VS Editor Plugin
 	Ref<InputEventMouseButton> key = p_event;
 
diff --git a/scene/2d/touch_screen_button.cpp b/scene/2d/touch_screen_button.cpp
index 9d6868a1b26..4e58984b376 100644
--- a/scene/2d/touch_screen_button.cpp
+++ b/scene/2d/touch_screen_button.cpp
@@ -189,6 +189,8 @@ String TouchScreenButton::get_action() const {
 }
 
 void TouchScreenButton::_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	if (!get_tree()) {
 		return;
 	}
diff --git a/scene/gui/base_button.cpp b/scene/gui/base_button.cpp
index db13b9b11f5..826fd0189bc 100644
--- a/scene/gui/base_button.cpp
+++ b/scene/gui/base_button.cpp
@@ -53,6 +53,8 @@ void BaseButton::_unpress_group() {
 }
 
 void BaseButton::_gui_input(Ref<InputEvent> p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	if (status.disabled) { // no interaction with disabled button
 		return;
 	}
@@ -323,6 +325,8 @@ Ref<Shortcut> BaseButton::get_shortcut() const {
 }
 
 void BaseButton::_unhandled_key_input(Ref<InputEvent> p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	if (!_is_focus_owner_in_shorcut_context()) {
 		return;
 	}
diff --git a/scene/gui/file_dialog.cpp b/scene/gui/file_dialog.cpp
index 7ac8dbccca9..5409b44b9e1 100644
--- a/scene/gui/file_dialog.cpp
+++ b/scene/gui/file_dialog.cpp
@@ -96,6 +96,8 @@ 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() && has_focus()) {
 		if (k->is_pressed()) {
diff --git a/scene/gui/gradient_edit.cpp b/scene/gui/gradient_edit.cpp
index 36b383f16c3..e72709e847a 100644
--- a/scene/gui/gradient_edit.cpp
+++ b/scene/gui/gradient_edit.cpp
@@ -92,6 +92,8 @@ GradientEdit::~GradientEdit() {
 }
 
 void GradientEdit::_gui_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	Ref<InputEventKey> k = p_event;
 
 	if (k.is_valid() && k->is_pressed() && k->get_keycode() == KEY_DELETE && grabbed != -1) {
diff --git a/scene/gui/graph_edit.cpp b/scene/gui/graph_edit.cpp
index b93391ee4c1..65046d5d100 100644
--- a/scene/gui/graph_edit.cpp
+++ b/scene/gui/graph_edit.cpp
@@ -154,6 +154,8 @@ Vector2 GraphEditMinimap::_convert_to_graph_position(const Vector2 &p_position)
 }
 
 void GraphEditMinimap::_gui_input(const Ref<InputEvent> &p_ev) {
+	ERR_FAIL_COND(p_ev.is_null());
+
 	if (!ge->is_minimap_enabled()) {
 		return;
 	}
@@ -1066,6 +1068,8 @@ 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() & MOUSE_BUTTON_MASK_MIDDLE || (mm->get_button_mask() & MOUSE_BUTTON_MASK_LEFT && Input::get_singleton()->is_key_pressed(KEY_SPACE)))) {
 		h_scroll->set_value(h_scroll->get_value() - mm->get_relative().x);
diff --git a/scene/gui/graph_node.cpp b/scene/gui/graph_node.cpp
index 8eba473d57f..7d5c53effe4 100644
--- a/scene/gui/graph_node.cpp
+++ b/scene/gui/graph_node.cpp
@@ -804,6 +804,8 @@ 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/item_list.cpp b/scene/gui/item_list.cpp
index 482560d29d0..86d070f9b1b 100644
--- a/scene/gui/item_list.cpp
+++ b/scene/gui/item_list.cpp
@@ -530,6 +530,8 @@ Size2 ItemList::Item::get_icon_size() const {
 }
 
 void ItemList::_gui_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	double prev_scroll = scroll_bar->get_value();
 
 	Ref<InputEventMouseMotion> mm = p_event;
diff --git a/scene/gui/line_edit.cpp b/scene/gui/line_edit.cpp
index d1cd73c803e..2d8eb3191c9 100644
--- a/scene/gui/line_edit.cpp
+++ b/scene/gui/line_edit.cpp
@@ -215,6 +215,8 @@ void LineEdit::_delete(bool p_word, bool p_all_to_right) {
 }
 
 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/menu_button.cpp b/scene/gui/menu_button.cpp
index 5acc7e808a2..1e9baa77fc4 100644
--- a/scene/gui/menu_button.cpp
+++ b/scene/gui/menu_button.cpp
@@ -34,6 +34,8 @@
 #include "scene/main/window.h"
 
 void MenuButton::_unhandled_key_input(Ref<InputEvent> p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	if (!_is_focus_owner_in_shorcut_context()) {
 		return;
 	}
diff --git a/scene/gui/popup_menu.cpp b/scene/gui/popup_menu.cpp
index bfbd46a9f0e..44df8eafdc9 100644
--- a/scene/gui/popup_menu.cpp
+++ b/scene/gui/popup_menu.cpp
@@ -252,6 +252,8 @@ void PopupMenu::_submenu_timeout() {
 }
 
 void PopupMenu::_gui_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	if (p_event->is_action("ui_down") && p_event->is_pressed()) {
 		int search_from = mouse_over + 1;
 		if (search_from >= items.size()) {
diff --git a/scene/gui/rich_text_label.cpp b/scene/gui/rich_text_label.cpp
index 09f65782951..c763ae6bd60 100644
--- a/scene/gui/rich_text_label.cpp
+++ b/scene/gui/rich_text_label.cpp
@@ -1469,6 +1469,8 @@ 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_bar.cpp b/scene/gui/scroll_bar.cpp
index a56bf15507a..62276e3af0c 100644
--- a/scene/gui/scroll_bar.cpp
+++ b/scene/gui/scroll_bar.cpp
@@ -42,6 +42,8 @@ void ScrollBar::set_can_focus_by_default(bool p_can_focus) {
 }
 
 void ScrollBar::_gui_input(Ref<InputEvent> p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	Ref<InputEventMouseMotion> m = p_event;
 	if (!m.is_valid() || drag.active) {
 		emit_signal("scrolling");
diff --git a/scene/gui/scroll_container.cpp b/scene/gui/scroll_container.cpp
index 90a528482f8..757a0841eaa 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 7f1d19a87ae..a407ef21cbc 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 50b25fa7b42..9dc2afdb2dc 100644
--- a/scene/gui/spin_box.cpp
+++ b/scene/gui/spin_box.cpp
@@ -100,6 +100,8 @@ 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 c80120f87d9..13ff2c5b869 100644
--- a/scene/gui/split_container.cpp
+++ b/scene/gui/split_container.cpp
@@ -207,6 +207,8 @@ 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/subviewport_container.cpp b/scene/gui/subviewport_container.cpp
index 8ffdd269a4f..bfc7e29f9cf 100644
--- a/scene/gui/subviewport_container.cpp
+++ b/scene/gui/subviewport_container.cpp
@@ -140,6 +140,8 @@ void SubViewportContainer::_notification(int p_what) {
 }
 
 void SubViewportContainer::_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	if (Engine::get_singleton()->is_editor_hint()) {
 		return;
 	}
@@ -165,6 +167,8 @@ void SubViewportContainer::_input(const Ref<InputEvent> &p_event) {
 }
 
 void SubViewportContainer::_unhandled_input(const Ref<InputEvent> &p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	if (Engine::get_singleton()->is_editor_hint()) {
 		return;
 	}
diff --git a/scene/gui/tab_container.cpp b/scene/gui/tab_container.cpp
index 1e31f9e2060..ff9dafa0f9c 100644
--- a/scene/gui/tab_container.cpp
+++ b/scene/gui/tab_container.cpp
@@ -72,6 +72,8 @@ 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 38a5588b7ef..6cbc5890ce6 100644
--- a/scene/gui/tabs.cpp
+++ b/scene/gui/tabs.cpp
@@ -91,6 +91,8 @@ 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 74c530f1b00..f54ab004c6c 100644
--- a/scene/gui/text_edit.cpp
+++ b/scene/gui/text_edit.cpp
@@ -2854,6 +2854,8 @@ 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/gui/tree.cpp b/scene/gui/tree.cpp
index abfea241f34..73fd9dbcd73 100644
--- a/scene/gui/tree.cpp
+++ b/scene/gui/tree.cpp
@@ -2402,6 +2402,8 @@ void Tree::_go_down() {
 }
 
 void Tree::_gui_input(Ref<InputEvent> p_event) {
+	ERR_FAIL_COND(p_event.is_null());
+
 	Ref<InputEventKey> k = p_event;
 
 	bool is_command = k.is_valid() && k->get_command();
diff --git a/scene/main/viewport.cpp b/scene/main/viewport.cpp
index 5df35d1e6a2..f382f5b685c 100644
--- a/scene/main/viewport.cpp
+++ b/scene/main/viewport.cpp
@@ -3067,6 +3067,7 @@ void Viewport::input(const Ref<InputEvent> &p_event, bool p_local_coords) {
 }
 
 void Viewport::unhandled_input(const Ref<InputEvent> &p_event, bool p_local_coords) {
+	ERR_FAIL_COND(p_event.is_null());
 	ERR_FAIL_COND(!is_inside_tree());
 
 	if (disable_input || !_can_consume_input_events()) {