Re: [libvirt] [PATCH ruby-libvirt v2] Don't free more entries than we retrieved

The vir*List* functions return the number of fetched entries. We mustn't free more, otherwise we'll crash like #0 0xb779d424 in __kernel_vsyscall () #1 0xb733981f in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56 #2 0xb733ccd3 in __GI_abort () at abort.c:90 #3 0xb7376275 in __libc_message (do_abort=do_abort@entry=2, fmt=fmt@entry=0xb74767d0 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:199 #4 0xb7380e52 in malloc_printerr (action=<optimized out>, str=<optimized out>, ptr=0xb7087000) at malloc.c:4923 #5 0xb7381b90 in _int_free (av=0xb74b7440 <main_arena>, p=0xb7086ff8, have_lock=0) at malloc.c:3779 #6 0xb75c059f in ruby_xfree () from /usr/lib/libruby-1.9.1.so.1.9 #7 0xb7076448 in ruby_libvirt_generate_list () from /usr/lib/ruby/vendor_ruby/1.9.1/i486-linux/_libvirt.so ... since we're trying to free random addresses.