--- screen-write.c.orig 2023-12-12 21:17:02.960288969 +0100
+++ screen-write.c 2023-12-12 21:18:07.498869550 +0100
@@ -2120,6 +2120,10 @@
return (0);
}
+ /* Check if this combined character would be too long. */
+ if (last.data.size + ud->size > sizeof last.data.data)
+ return (0);
+
/* Combining; flush any pending output. */
screen_write_collect_flush(ctx, 0, __func__);