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Thread 1 (Thread 945):
#0  0x00987416 in __kernel_vsyscall ()
No symbol table info available.
#1  0x00ebecb1 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        resultvar = <value optimized out>
        resultvar = <value optimized out>
        pid = 16715764
        selftid = 945
#2  0x00ec218e in abort () at abort.c:92
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x3b1, sa_sigaction = 0x3b1}, sa_mask = {__val = {16715764, 1, 3217049596, 3217049432, 16367925, 14296292, 136110592, 134620225, 134564644, 3217049596, 39712, 3217049564, 134527236, 134515132, 1031, 0, 16106625, 134620225, 134564628, 3217049492, 16715764, 10, 3217050952, 3217049612, 16228801, 2, 3217049492, 4, 0, 0, 2, 16555288}}, sa_flags = 4, sa_restorer = 0xfcc222}
        sigs = {__val = {32, 0 <repeats 31 times>}}
#3  0x00ef5dc7 in __libc_message (do_abort=2, fmt=0xfce07c "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:189
        ap = 0xb7600468 "*** glibc detected *** /usr/bin/X: corrupted double-linked list: 0x08da5930 ***\n"
        ap_copy = 0xb7600468 "*** glibc detected *** /usr/bin/X: corrupted double-linked list: 0x08da5930 ***\n"
        fd = 2
        on_2 = <value optimized out>
        list = <value optimized out>
        nlist = <value optimized out>
        cp = <value optimized out>
        written = <value optimized out>
#4  0x00f001a1 in malloc_printerr (action=<value optimized out>, str=<value optimized out>, ptr=0x8da5930) at malloc.c:6283
        buf = "08da5930"
        cp = <value optimized out>
#5  0x00f01b78 in _int_free (av=<value optimized out>, p=0x8da5158) at malloc.c:4973
        size = 2008
        fb = <value optimized out>
        nextchunk = 0x8da5930
        nextsize = 2920
        nextinuse = <value optimized out>
        prevsize = <value optimized out>
        bck = 0xff23f0
        fwd = 0x8e29908
        errstr = 0x0
        __func__ = "_int_free"
#6  0x00f04c8d in __libc_free (mem=0x8da5888) at malloc.c:3738
        ar_ptr = 0xff23c0
        p = <value optimized out>
        hook = <value optimized out>
#7  0x00bba019 in ?? () from /usr/lib/xorg/modules/extensions/libglx.so
No symbol table info available.
#8  0x00bae2c7 in ?? () from /usr/lib/xorg/modules/extensions/libglx.so
No symbol table info available.
#9  0x0808fa21 in FreeClientResources ()
No symbol table info available.
#10 0x0808fae6 in FreeAllResources ()
No symbol table info available.
#11 0x08062880 in _start ()
No symbol table info available.