Crash when XEmacs window is resized to a really small size

In XEmacs 21.2 (beta43) "Terspichore" [Lucid] (i686-pc-cygwin) of Tue Jan 30 2001 on LUCY configured using `configure '-cflags=-mcpu=pentiumpro -march=pentiumpro' --with-wmcommand=no --with-dragndrop' Hi, When I resize XEmacs (using the mouse) to a really small size, it crashes with: LUCY:/usr/local/bin$xemacs & [1] 1536 LUCY:/usr/local/bin$Fatal error: assertion failed, file redisplay-output.c, line 1574, db->xpos >= 0 && db->ypos >= 0 [1]+ Exit 1 xemacs LUCY:/usr/local/bin$ -- Cheers, -Dima.