GitLab

 src/xdisp.c (deep_copy_glyph_row): Assert that the 'used' counts of
 FROM and TO are identical.  Copy only the glyphs of TEXT_AREA.
 src/term.c (save_and_enable_current_matrix): Don't allocate and
 don't save margin areas.
 (restore_desired_matrix): Don't restore margin areas.
 (free_saved_screen): Don't free margin areas.