Fix crash with FindReplaceBar

editor/code_editor.cpp

@@ -105,6 +105,11 @@ void FindReplaceBar::_notification(int p_what) {
 		hide_button->set_custom_minimum_size(hide_button->get_normal_texture()->get_size());
 	} else if (p_what == NOTIFICATION_THEME_CHANGED) {
 		matches_label->add_theme_color_override("font_color", results_count > 0 ? get_theme_color("font_color", "Label") : get_theme_color("error_color", "Editor"));
+	} else if (p_what == NOTIFICATION_PREDELETE) {
+		if (base_text_editor) {
+			base_text_editor->remove_find_replace_bar();
+			base_text_editor = nullptr;
+		}
 	}
 }
 
@@ -595,6 +600,10 @@ void FindReplaceBar::set_text_edit(CodeTextEditor *p_text_editor) {
 		text_editor = nullptr;
 	}
 
+	if (!p_text_editor) {
+		return;
+	}
+
 	results_count = -1;
 	base_text_editor = p_text_editor;
 	text_editor = base_text_editor->get_text_editor();
@@ -1661,6 +1670,11 @@ void CodeTextEditor::_notification(int p_what) {
 			}
 			set_process_input(is_visible_in_tree());
 		} break;
+		case NOTIFICATION_PREDELETE: {
+			if (find_replace_bar) {
+				find_replace_bar->set_text_edit(nullptr);
+			}
+		} break;
 		default:
 			break;
 	}

editor/plugins/script_editor_plugin.cpp

@@ -760,6 +760,7 @@ void ScriptEditor::_close_tab(int p_idx, bool p_save, bool p_history_back) {
 	_update_members_overview_visibility();
 	_update_help_overview_visibility();
 	_save_layout();
+	_update_find_replace_bar();
 }
 
 void ScriptEditor::_close_current_tab(bool p_save) {
@@ -829,6 +830,7 @@ void ScriptEditor::_close_all_tabs() {
 
 		_close_current_tab(false);
 	}
+	_update_find_replace_bar();
 }
 
 void ScriptEditor::_ask_close_current_unsaved_tab(ScriptEditorBase *current) {
@@ -1640,15 +1642,13 @@ void ScriptEditor::ensure_select_current() {
 		ScriptEditorBase *se = _get_current_editor();
 		if (se) {
 			se->enable_editor();
-			se->set_find_replace_bar(find_replace_bar);
 
 			if (!grab_focus_block && is_visible_in_tree()) {
 				se->ensure_focus();
 			}
-		} else {
-			find_replace_bar->hide();
 		}
 	}
+	_update_find_replace_bar();
 
 	_update_selected_editor_menu();
 }
@@ -2520,6 +2520,16 @@ void ScriptEditor::_file_removed(const String &p_removed_file) {
 	}
 }
 
+void ScriptEditor::_update_find_replace_bar() {
+	ScriptEditorBase *se = _get_current_editor();
+	if (se) {
+		se->set_find_replace_bar(find_replace_bar);
+	} else {
+		find_replace_bar->set_text_edit(nullptr);
+		find_replace_bar->hide();
+	}
+}
+
 void ScriptEditor::_autosave_scripts() {
 	save_all_scripts();
 }

editor/plugins/script_editor_plugin.h

@@ -328,6 +328,7 @@ class ScriptEditor : public PanelContainer {
 	void _show_error_dialog(String p_path);
 
 	void _close_tab(int p_idx, bool p_save = true, bool p_history_back = true);
+	void _update_find_replace_bar();
 
 	void _close_current_tab(bool p_save = true);
 	void _close_discard_current_tab(const String &p_str);