[ruby-dev:24438] File.sysopen dumps core

次のようにすると core を吐きます。

% ./ruby -e '
def fin(&block) ObjectSpace.define_finalizer(Object.new, &block) end
f = [File.open("/dev/null")]
begin
  loop { File.sysopen("/dev/null") }
rescue Errno::EMFILE
end
f.clear
fname = "\0" * 0x20000
fname[0,9] = "/dev/null"
str = "\0" * 0x20000
fin { fname.replace "" }
p File.sysopen(fname)
'
-e:13: [BUG] Segmentation fault
ruby 1.9.0 (2004-10-06) [i686-linux]

zsh: abort (core dumped)  ./ruby -e 
% gdb ruby core 
GNU gdb 6.1-debian
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-linux"...Using host libthread_db library "/lib/libthread_db.so.1".

Core was generated by `./ruby -e 
def fin(&block) ObjectSpace.define_finalizer(Object.new, &block) end'.
Program terminated with signal 6, Aborted.
Reading symbols from /lib/libdl.so.2...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /lib/libcrypt.so.1...done.
Loaded symbols for /lib/libcrypt.so.1
Reading symbols from /lib/libm.so.6...done.
Loaded symbols for /lib/libm.so.6
Reading symbols from /lib/libc.so.6...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /lib/ld-linux.so.2...done.
Loaded symbols for /lib/ld-linux.so.2
#0  0x4009e721 in kill () from /lib/libc.so.6
(gdb) bt
#0  0x4009e721 in kill () from /lib/libc.so.6
#1  0x4009e4c5 in raise () from /lib/libc.so.6
#2  0x4009f9e8 in abort () from /lib/libc.so.6
#3  0x080d2416 in rb_bug (fmt=0x0) at error.c:214
#4  0x080b0352 in sigsegv (sig=11) at signal.c:446
#5  <signal handler called>
#6  0x400eac0f in strlen () from /lib/libc.so.6
#7  0x080b33f8 in rb_str_new2 (ptr=0x401d9008 <Address 0x401d9008 out of bounds>) at string.c:92
#8  0x080d3f48 in rb_sys_fail (mesg=0x401d9008 <Address 0x401d9008 out of bounds>) at error.c:1170
#9  0x0807812b in rb_sysopen (fname=0x401d9008 <Address 0x401d9008 out of bounds>, flags=0, mode=438) at io.c:2465
#10 0x08078d84 in rb_io_s_sysopen (argc=0, argv=0x0) at io.c:3095
#11 0x08069f5a in call_cfunc (func=0x8078d00 <rb_io_s_sysopen>, recv=1075632796, len=0, argc=-1, argv=0xbfffea38)
    at eval.c:5367
#12 0x0805e167 in rb_call0 (klass=1075636656, recv=1075632796, id=7441, oid=0, argc=1, argv=0xbfffea38, body=0x401ce910, 
    nosuper=0) at eval.c:5508
#13 0x0805e418 in rb_call (klass=1075636656, recv=1075632796, mid=7441, argc=1, argv=0xbfffea38, scope=0) at eval.c:5729
#14 0x08059348 in rb_eval (self=1075673496, n=0x0) at ruby.h:635
#15 0x08059678 in rb_eval (self=1075673496, n=0x0) at ruby.h:664
#16 0x080558db in ruby_exec () at eval.c:1458
#17 0x08055920 in ruby_run () at eval.c:1484
#18 0x080539e5 in main (argc=0, argv=0x0, envp=0xbffff874) at main.c:38
(gdb) 
-- 
[田中 哲][たなか あきら][Tanaka Akira]