Ruby dumps core as follows.

% ./ruby -ryaml -e '
YAML::Syck::Loader.new.transfer(0, 0)'
-e:2: [BUG] Segmentation fault
ruby 1.9.0 (2004-12-23) [i686-linux]

zsh: abort      ./ruby -ryaml -e ' YAML::Syck::Loader.new.transfer(0, 0)'
% gdb ruby core 
GNU gdb 6.1-debian
Copyright 2004 Free Software Foundation, Inc.
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This GDB was configured as "i386-linux"...Using host libthread_db library "/lib/libthread_db.so.1".


warning: exec file is newer than core file.
Core was generated by `./ruby -ryaml -e 
YAML::Syck::Loader.new.transfer(0, 0)'.
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
Reading symbols from /home/akr/ruby/head-ruby/lib/ruby/1.9/i686-linux/syck.so...done.
Loaded symbols for /home/akr/ruby/head-ruby/lib/ruby/1.9/i686-linux/syck.so
#0  0x4009e6b1 in kill () from /lib/libc.so.6
(gdb) bt
#0  0x4009e6b1 in kill () from /lib/libc.so.6
#1  0x4009e435 in raise () from /lib/libc.so.6
#2  0x4009f978 in abort () from /lib/libc.so.6
#3  0x080d5926 in rb_bug (fmt=0x0) at error.c:205
#4  0x080b28e2 in sigsegv (sig=11) at signal.c:445
#5  0x0804e7e9 in ?? ()
#6  0xbfffef48 in ?? ()
#7  <signal handler called>
#8  0x401e3c42 in syck_loader_transfer (self=1075796152, type=1, val=1) at rubyext.c:1071
#9  0x0806ae3a in call_cfunc (func=0x401e3c20 <syck_loader_transfer>, recv=1075796152, len=2, argc=2, argv=0xbffff188)
    at eval.c:5418
#10 0x0805eab2 in rb_call0 (klass=1075585836, recv=1075796152, id=10761, oid=1, argc=2, argv=0xbffff188, body=0x401c20c0, 
    nosuper=0) at eval.c:5559
#11 0x0805ed78 in rb_call (klass=1075585836, recv=1075796152, mid=10761, argc=2, argv=0xbffff188, scope=0) at eval.c:5781
#12 0x0805989a in rb_eval (self=1075673536, n=0x1) at ruby.h:635
#13 0x08055e6d in ruby_exec_internal () at eval.c:1470
#14 0x08055e86 in ruby_exec () at eval.c:1488
#15 0x08055ed0 in ruby_run () at eval.c:1505
#16 0x08053ed5 in main (argc=1, argv=0x1, envp=0xbffff968) at main.c:38
(gdb) 
-- 
[田中 哲][たなか あきら][Tanaka Akira]