Merge pull request #51974 from anazr9/godot-3.x-fixes

Fixed Crash with RichTextLabel [fill] tag #51968

scene/gui/rich_text_label.cpp

@@ -447,7 +447,7 @@ int RichTextLabel::_process_line(ItemFrame *p_frame, const Vector2 &p_ofs, int &
 					fh = line_ascent + line_descent;
 
 					if (end && c[end - 1] == ' ') {
-						if (align == ALIGN_FILL) {
+						if (align == ALIGN_FILL && p_mode != PROCESS_CACHE) {
 							int ln = MIN(l.offset_caches.size() - 1, line);
 							if (l.space_caches[ln]) {
 								align_ofs = spaces * l.offset_caches[ln] / l.space_caches[ln];