emacs21 segfaults

[Alexander Sack <asac@jwsdot.com>]

emacs21 segfault on my up-to date debian kfreebsd system. Here the gdb 
output:

Program received signal SIGSEGV, Segmentation fault.
0x284ce9b8 in __strspn_c3 (
   __s=0x23000 <Error reading address 0x23000: Bad address>,
   __accept1=536870912, __accept2=20960, __accept3=135680543)
   at string2.h:1006
1006    string2.h: No such file or directory.
       in string2.h
(gdb) bt
#0  0x284ce9b8 in __strspn_c3 (
   __s=0x23000 <Error reading address 0x23000: Bad address>,
   __accept1=536870912, __accept2=20960, __accept3=135680543)
   at string2.h:1006
#1  0x284c5692 in sYSMALLOc (nb=32784, av=0x285633c0) at malloc.c:2881
#2  0x284c6b8f in _int_malloc (av=0x285633c0, bytes=676129208) at 
malloc.c:4093
#3  0x284c5a75 in __libc_malloc (bytes=32776) at malloc.c:3281
#4  0x08123b2c in re_compile_pattern ()
#5  0x284c5a00 in __libc_malloc (bytes=32776) at malloc.c:3276
#6  0x081238ed in re_compile_pattern ()
#7  0x08124dfa in re_compile_pattern ()
#8  0x08124e7d in re_compile_pattern ()
#9  0x08125027 in re_compile_pattern ()
#10 0x080e8a12 in abort ()
#11 0x080dad84 in abort ()
#12 0x28473b77 in __libc_start_main (main=0x80da5d0 <abort+1392>, argc=1,
   ubp_av=0x2000, init=0x804d654 <_init>,
   fini=0x8008 <_dl_map_object_deps_internal+68>, rtld_fini=0x20000000,
   stack_end=0x19999999) at ../sysdeps/generic/libc-start.c:144