tac assert failure: *** glibc detected *** tac: double free or corruption (!prev): 0x0946a890 ***

[Marcos K]

text file contains ^M
(hope it's attached)

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: coreutils 8.5-1ubuntu6
ProcVersionSignature: Ubuntu 3.0.0-26.43-generic 3.0.43
Uname: Linux 3.0.0-26-generic i686
NonfreeKernelModules: btrfs zlib_deflate libcrc32c ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs reiserfs usb_storage uas cdc_acm st lp parport_pc pci_stub vboxpci vboxnetadp vboxnetflt vboxdrv snd_hrtimer rfcomm bnep ip6table_filter ip6_tables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp iptable_filter ip_tables x_tables bridge stp ppdev binfmt_misc gspca_vc032x gspca_main snd_hda_codec_realtek videodev snd_hda_intel btusb snd_hda_codec snd_hwdep snd_pcm arc4 bluetooth snd_seq_midi radeon snd_rawmidi iwl3945 snd_seq_midi_event iwl_legacy snd_seq joydev snd_timer snd_seq_device pcmcia tifm_7xx1 tifm_core ttm drm_kms_helper drm nls_iso8859_1 nls_cp437 yenta_socket pcmcia_rsrc irda snd mac80211 acer_wmi psmouse serio_raw i2c_algo_bit pcmcia_core soundcore snd_page_alloc crc_ccitt sparse_keymap cfg80211 vfat fat wmi parport usbhid hid firewire_ohci firewire_core crc_itu_t tg3
ApportVersion: 1.23-0ubuntu4
Architecture: i386
AssertionMessage: *** glibc detected *** tac: double free or corruption (!prev): 0x0946a890 ***
Date: Mon Oct 29 15:19:32 2012
ExecutablePath: /usr/bin/tac
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
ProcCmdline: tac
Signal: 6
SourcePackage: coreutils
StacktraceTop:
 __kernel_vsyscall ()
 raise () from /lib/i386-linux-gnu/libc.so.6
 abort () from /lib/i386-linux-gnu/libc.so.6
 ?? () from /lib/i386-linux-gnu/libc.so.6
 ?? () from /lib/i386-linux-gnu/libc.so.6
Title: tac assert failure: *** glibc detected *** tac: double free or corruption (!prev): 0x0946a890 ***
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout libvirtd lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 __libc_message (do_abort=2, fmt=0xad1c6c "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:189
 malloc_printerr (action=<optimized out>, str=<optimized out>, ptr=0x946a890) at malloc.c:6283
 _int_free (av=0xb0e400, p=0x946a888) at malloc.c:4795
 __GI___libc_free (mem=0x946a890) at malloc.c:3738
 main (argc=1, argv=0xbff5b6f4) at tac.c:669