updated for version 7.3.472
Problem:    Crash when using ":redraw" in a BufEnter autocommand and
            switching to another tab. (驼峰)
Solution:   Move triggering the the autocommands to after correcting the
            option values. Also check the row value to be out of bounds.
            (Christian Brabandt, Sergey Khorev)
diff --git a/src/window.c b/src/window.c
index 6c02570..0a0a2d4 100644
--- a/src/window.c
+++ b/src/window.c
@@ -3676,13 +3676,6 @@
     win_enter_ext(tp->tp_curwin, FALSE, TRUE);
     prevwin = next_prevwin;
 
-#ifdef FEAT_AUTOCMD
-    apply_autocmds(EVENT_TABENTER, NULL, NULL, FALSE, curbuf);
-
-    if (old_curbuf != curbuf)
-	apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf);
-#endif
-
     last_status(FALSE);		/* status line may appear or disappear */
     (void)win_comp_pos();	/* recompute w_winrow for all windows */
     must_redraw = CLEAR;	/* need to redraw everything */
@@ -3712,6 +3705,14 @@
     gui_may_update_scrollbars();
 #endif
 
+#ifdef FEAT_AUTOCMD
+    /* Apply autocommands after updating the display, when 'rows' and
+     * 'columns' have been set correctly. */
+    apply_autocmds(EVENT_TABENTER, NULL, NULL, FALSE, curbuf);
+    if (old_curbuf != curbuf)
+	apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf);
+#endif
+
     redraw_all_later(CLEAR);
 }