# Eigenmethod definition for BasicObjects dumps core **URL:** \ **Category:** Development\ **Created:** [December 12, 2007, 6:36pm UTC](https://www.ruby-forum.com/t/eigenmethod-definition-for-basicobjects-dumps-core/122840 "2007-12-12T18:36:04Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![sugie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/82dd89/32.png) [@sugie](https://www.ruby-forum.com/u/sugie)\ **Post date:** [December 12, 2007, 6:36pm UTC](https://www.ruby-forum.com/t/eigenmethod-definition-for-basicobjects-dumps-core/122840/1 "2007-12-12T18:36:04Z")
e$B:XF#$H?=$7$^$9!#e(B BasicObjecte$B$NFC0[%a%=%C%I$rDj5A$9$k$H!"e(Bcoree$B$rEG$/$h$&$G$9!#e(B $ gdb ruby-trunk (snip) (gdb) run -e ‘def (b=BasicObject.new).foo;end’ Starting program: /home/tadashi/svn/ruby/o/trunk/ruby-trunk -e ‘def (b=BasicObject.new).foo;end’ Failed to read a valid object file image from memory. [Thread debugging using libthread\_db enabled] [New Thread -1211369792 (LWP 5008)] [New Thread -1212101712 (LWP 5011)] Program received signal SIGSEGV, Segmentation fault. [Switching to Thread -1211369792 (LWP 5008)] 0xb7f6292f in vm\_eval\_body (th=0x804a160) at …/…/trunk/vm.c:1193 1193 epc = cfp-\>pc - cfp-\>iseq-\>iseq\_encoded; (gdb) l 1188 while (th-\>cfp-\>pc == 0 || th-\>cfp-\>iseq == 0) { 1189 th-\>cfp++; 1190 } 1191 1192 cfp = th-\>cfp; 1193 epc = cfp-\>pc - cfp-\>iseq-\>iseq\_encoded; 1194 1195 if (state == TAG\_BREAK || state == TAG\_RETURN) { 1196 escape\_dfp = GET\_THROWOBJ\_CATCH\_POINT(err); 1197 (gdb) bt #0 0xb7f6292f in vm\_eval\_body (th=0x804a160) at …/…/trunk/vm.c:1193 #1 0xb7f62f00 in rb\_iseq\_eval (iseqval=3082895600) at …/…/trunk/vm.c:1372 #2 0xb7eb075b in ruby\_exec\_node (n=0xb7c14168, file=0x80931a1 “-e”) at …/…/trunk/eval.c:232 #3 0xb7eb502a in ruby\_run\_node (n=0xb7c14168) at …/…/trunk/eval.c:262 #4 0x080486ce in main (argc=3, argv=0xbf8dcff4, envp=0xbf8dd004) at …/…/trunk/main.c:30 ---
**Author:** ![sugie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/82dd89/32.png) [@sugie](https://www.ruby-forum.com/u/sugie)\ **Post date:** [December 12, 2007, 6:39pm UTC](https://www.ruby-forum.com/t/eigenmethod-definition-for-basicobjects-dumps-core/122840/2 "2007-12-12T18:39:39Z")
e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B In message “Re: [ruby-dev:32531] eigenmethod definition for BasicObjects dumps core” on Tue, 11 Dec 2007 04:45:03 +0900, Tadashi S. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) writes: |BasicObjecte$B$NFC0[%a%=%C%I$rDj5A$9$k$H!"e(Bcoree$B$rEG$/$h$&$G$9!#e(B BasicObjecte$B$NL$Dj5A%a%=%C%I$r8F$V$@$1$GMn$A$F$^$7$?!#e(B e$B$5$C$-%3%\_%C%H$7$^$7$?!#e(B