#0  0x00007f1f86bd8475 in __GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        resultvar = 0
        pid = <optimized out>
        selftid = 4063
#1  0x00007f1f86bdbbdb in __GI_abort () at abort.c:91
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x4173ae, sa_sigaction = 0x4173ae}, sa_mask = {__val = {139773382599453, 0, 7025072, 140734922803040, 139773381499810, 4289454, 206158430232, 140734922803056, 140734922802832, 7302446, 206158430256, 7044032, 139773384943392, 139773382604600, 0, 140734922807421}}, sa_flags = -2033089757, sa_restorer = 0x41833c}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f1f86bd110e in __assert_fail_base (fmt=<optimized out>, assertion=0x4173ae "!(1)", file=0x41833c "disk-io.c", line=<optimized out>, function=<optimized out>) at assert.c:94
        str = 0x6b7bc0 ""
        total = 4096
#3  0x00007f1f86bd11b2 in __GI___assert_fail (assertion=0x4173ae "!(1)", file=0x41833c "disk-io.c", line=679, function=0x4186a8 "open_ctree_fd") at assert.c:103
No locals.
#4  0x000000000040a5a4 in open_ctree_fd (fp=3, path=0x7fff6714d885 "/dev/sda3", sb_bytenr=<optimized out>, writes=<optimized out>) at disk-io.c:659
        sectorsize = 0
        nodesize = 8
        leafsize = 4063
        stripesize = 65536
        key = {objectid = 0, type = 0 '\000', offset = 139773387174453}
        tree_root = 0x6b3010
        extent_root = <optimized out>
        chunk_root = <optimized out>
        dev_root = 0x6b34f0
        csum_root = 0x6b3690
        fs_info = 0x6b3830
        ret = <optimized out>
        disk_super = <optimized out>
        fs_devices = 0x6b55e0
        total_devs = 2
        features = <optimized out>
        __PRETTY_FUNCTION__ = "open_ctree_fd"
#5  0x000000000040a9e9 in open_ctree (filename=0x7fff6714d885 "/dev/sda3", sb_bytenr=0, writes=0) at disk-io.c:583
        fp = 3
        root = <optimized out>
        flags = <optimized out>
#6  0x00000000004012de in main (ac=<optimized out>, av=<optimized out>) at btrfsck.c:2835
        root_cache = {root = {rb_node = 0x0, rotate_notify = 0x417035 <__libc_csu_init+69>}}
        root = <optimized out>
        ret = <optimized out>
        file = 0x7fff6714d885 "/dev/sda3"
        pos = <optimized out>