[ruby-dev:22518] core dump with delete_if

delete_if による core dump ですが、根治していなかったことが判明しまし
た。

% ./ruby -e 'h = {}  
Thread.new { loop { h.delete_if {|k, s| true } } }
Thread.new { loop { h.delete_if {|k, s| true } } }
loop { h[rand] = "" }
'
zsh: segmentation fault (core dumped)  ./ruby -e 
% gdb ruby core 
GNU gdb 5.3-debian
Copyright 2002 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"...
Core was generated by `./ruby -e h = {}
Thread.new { loop { h.delete_if {|k, s| true } } }
Thread.new'.
Program terminated with signal 11, Segmentation fault.
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  0x400e1377 in mallopt () from /lib/libc.so.6
(gdb) bt
#0  0x400e1377 in mallopt () from /lib/libc.so.6
#1  0x400e05d3 in malloc () from /lib/libc.so.6
#2  0x0806a6fc in ruby_xmalloc (size=16) at gc.c:116
#3  0x080aacca in st_insert (table=0x8122a78, key=1075880460, value=1075880440)
    at st.c:301
#4  0x0806d46c in rb_hash_aset (hash=1075568216, key=1075880460, 
    val=1075880440) at hash.c:864
#5  0x0805bb84 in rb_call0 (klass=1075604236, recv=1075568216, id=333, 
    oid=333, argc=2, argv=0xbfffe340, body=0x401c68f0, nosuper=0)
    at eval.c:5362
#6  0x0805c5c6 in rb_call (klass=1075604236, recv=1075568216, mid=333, argc=2, 
    argv=0xbfffe340, scope=0) at eval.c:5708
#7  0x0805708f in rb_eval (self=1075632656, n=0x401bded0) at eval.c:3218
#8  0x08059f83 in rb_yield_0 (val=6, self=1075632656, klass=0, flags=0, 
    avalue=0) at eval.c:4663
#9  0x0805a278 in rb_f_loop () at eval.c:4778
#10 0x0805bba1 in rb_call0 (klass=1075637416, recv=1075632656, id=3937, 
    oid=3937, argc=0, argv=0x0, body=0x401cd150, nosuper=0) at eval.c:5365
#11 0x0805c5c6 in rb_call (klass=1075637416, recv=1075632656, mid=3937, 
    argc=0, argv=0x0, scope=1) at eval.c:5708
#12 0x080574bc in rb_eval (self=1075632656, n=0x401bdea8) at eval.c:3251
#13 0x0805651c in rb_eval (self=1075632656, n=0x401be1a0) at eval.c:2956
#14 0x08053560 in eval_node (self=1075632656, node=0x401be1a0) at eval.c:1275
#15 0x08053a2e in ruby_exec () at eval.c:1444
#16 0x08053a8a in ruby_run () at eval.c:1465
#17 0x08051f56 in main (argc=3, argv=0xbffff914, envp=0xbffff924) at main.c:50
#18 0x40084e3e in __libc_start_main () from /lib/libc.so.6
(gdb) 

なお、helium でも同様です。
-- 
[田中 哲][たなか あきら][Tanaka Akira]