Steps to reproduce: With default values in /etc/X11/xdm/Xresources, add the following, and start xdm. xlogin*width: 290 xlogin*height: 140 Results: xdm starts, but exits immediately while drawing xlogin.
Stack trace in debugger shows we're trying to find the length of a string with negative length - oops! (dbx) where current thread: t@1 [1] XftTextExtents8(0x808c3a8, 0x8150138, 0x8095a78, 0xffffffff, 0x8042f80, 0x0), at 0xfe8d26e7 =>[2] XmuXftTextWidth(dpy = 0x808c3a8, font = 0x8150138, string = 0x8095a78 "", len = -1), line 1660 in "Login.c" [3] realizeValue(w = 0x80959c0, cursor = 0, promptNum = 0, gc = 0x814c0a8), line 411 in "Login.c" [4] DrawValue(w = 0x80959c0, cursor = 0, promptNum = 0), line 437 in "Login.c" [5] draw_it(w = 0x80959c0), line 806 in "Login.c" [...] Moving the (textlen > 0) from the end of the loop to the beginning makes it not crash for me - committed that to git master in commit f8585c60831a8e5ddebce18bdd7e78d217a822c5.
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