Starting program: /home/floppym/src/grub/build1/grub-probe --target=device /
[Thread debugging using libthread_db enabled]

Program received signal SIGSEGV, Segmentation fault.
0x0000000000490e03 in grub_find_root_devices_from_btrfs (dir=0x6f2710 "/")
    at ../branch1/util/getroot.c:489
489	  ret[j] = 0;
#0  0x0000000000490e03 in grub_find_root_devices_from_btrfs (dir=0x6f2710 "/")
    at ../branch1/util/getroot.c:489
        fd = 9
        fsi = {max_id = 1, num_devices = 1, fsid = " Ç´\354\371\367Ex\225r\021\362'\304\314W", 
          reserved = {0 <repeats 124 times>}}
        i = 1
        j = 4206176
        ret = 0x6f1080
#1  0x00000000004914c9 in grub_find_root_devices_from_mountinfo (dir=0x6f2710 "/", relroot=0x0)
    at ../branch1/util/getroot.c:626
        ret = 0x0
        fp = 0x6f3720
        buf = 0x6f3960 "32 16 8:1 / /boot rw,relatime - ext2 /dev/sda1 rw,user_xattr,acl,barrier=1\n"
        len = 120
        entry_len = 2
        entry_max = 4
        entries = 0x7ffff73c0010
        parent_entry = {id = 16, major = 0, minor = 0, enc_root = '\000' <repeats 16384 times>, 
          enc_path = '\000' <repeats 16384 times>, fstype = '\000' <repeats 16384 times>, 
          device = '\000' <repeats 16384 times>}
        i = 1
#2  0x0000000000491a85 in grub_guess_root_devices (dir=0x6f2710 "/")
    at ../branch1/util/getroot.c:973
        os_dev = 0x0
        st = {st_dev = 0, st_ino = 0, st_nlink = 0, st_mode = 4158563628, st_uid = 32767, 
          st_gid = 1, __pad0 = 0, st_rdev = 0, st_size = 140737488347680, 
          st_blksize = 140737345964984, st_blocks = 140737488348416, st_atim = {tv_sec = 0, 
            tv_nsec = 140737488347728}, st_mtim = {tv_sec = 4206176, tv_nsec = 140737488348416}, 
          st_ctim = {tv_sec = 140737351976853, tv_nsec = 7279392}, __unused = {100, 7284496, 0}}
        dev = 0
#3  0x000000000040384a in probe (path=0x6f1320 "/", device_names=0x0, delim=10 '\n')
    at ../branch1/util/grub-probe.c:333
        drives_names = 0x0
        curdev = 0x0
        curdrive = 0x7fffffffe390
        grub_path = 0x6f2710 "/"
        ndev = 0
#4  0x0000000000404d51 in main (argc=3, argv=0x7fffffffe508) at ../branch1/util/grub-probe.c:878
        delim = 10 '\n'
        arguments = {devices = 0x6f1050, device_max = 4, ndevices = 1, dev_map = 0x0, 
          zero_delim = 0}
A debugging session is active.

	Inferior 1 [process 2438] will be killed.

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