segfault

[aabacchus]

Every time: herbe hi segfaults.

Backtrace:

#0  IA__FcUtf8ToUcs4 (src_orig=src_orig@entry=0x7ffffffff000 <error: Cannot access memory at address 0x7ffffffff000>, dst=dst@entry=0x7fffffffd0ec,
    len=len@entry=21) at fcstr.c:639 (/lib/libfontconfig.so.1)
#1  0x00007ffff7db0c89 in IA__FcUtf8ToUcs4 (src_orig=src_orig@entry=0x7ffffffff000 <error: Cannot access memory at address 0x7ffffffff000>,
    dst=dst@entry=0x7fffffffd0ec, len=len@entry=21) at fcstr.c:636 (/lib/libfontconfig.so.1)
#2  0x00007ffff7df6c49 in XftTextExtentsUtf8 (dpy=0x7ffff7921040, pub=pub@entry=0x7ffff7810b30,
    string=0x7ffffffff000 <error: Cannot access memory at address 0x7ffffffff000>, string@entry=0x7fffffffefe0 "", len=21, len@entry=53,
    extents=extents@entry=0x7fffffffe14c) at xftextent.c:228 (/lib/libXft.so.2)
#3  0x00005555555563b1 in get_max_len (string=string@entry=0x7fffffffefe0 "", font=font@entry=0x7ffff7810b30,
    max_text_width=max_text_width@entry=420) at herbe.c:46
#4  0x0000555555556695 in main (argc=2, argv=0x7fffffffe4d8) at herbe.c:136