Hi, At Sat, 1 Mar 2003 22:32:50 +0900, Mauricio FernáÏdez wrote: > `mv core co/core.#{Time.new.to_i}` On Linux, writing 1 to /proc/sys/kernel/core_uses_pid makes core files unique. > #5 0x4012fb88 in sigaction () from /lib/libc.so.6 > #6 0x4008f9ba in rb_free_generic_ivar () from /usr/lib/libruby.so.1.6 It looks like a recently fixed bug. Wed Feb 26 00:02:41 2003 Nobuyoshi Nakada <nobu.nokada / softhome.net> * string.c (rb_str_dup): set FL_EXIVAR when copied generic ivar. (ruby-bugs-ja:PR#400) Do you make an instance variable of String object or mix a module which does such thing, and then add an instance variable again to a String duplicated from it? -- Nobu Nakada