[[case]] # orphan test
in = "lfs.c"
code = '''
    lfs_format(&lfs, &cfg) => 0;
    lfs_mount(&lfs, &cfg) => 0;
    lfs_mkdir(&lfs, "parent") => 0;
    lfs_mkdir(&lfs, "parent/orphan") => 0;
    lfs_mkdir(&lfs, "parent/child") => 0;
    lfs_remove(&lfs, "parent/orphan") => 0;
    lfs_unmount(&lfs) => 0;

    // corrupt the child's most recent commit, this should be the update
    // to the linked-list entry, which should orphan the orphan. Note this
    // makes a lot of assumptions about the remove operation.
    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "parent/child") => 0;
    lfs_block_t block = dir.m.pair[0];
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_unmount(&lfs) => 0;
    uint8_t bbuffer[LFS_BLOCK_SIZE];
    cfg.read(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    int off = LFS_BLOCK_SIZE-1;
    while (off >= 0 && bbuffer[off] == LFS_ERASE_VALUE) {
        off -= 1;
    }
    memset(&bbuffer[off-3], LFS_BLOCK_SIZE, 3);
    cfg.erase(&cfg, block) => 0;
    cfg.prog(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    cfg.sync(&cfg) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_stat(&lfs, "parent/orphan", &info) => LFS_ERR_NOENT;
    lfs_stat(&lfs, "parent/child", &info) => 0;
    lfs_fs_size(&lfs) => 8;
    lfs_unmount(&lfs) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_stat(&lfs, "parent/orphan", &info) => LFS_ERR_NOENT;
    lfs_stat(&lfs, "parent/child", &info) => 0;
    lfs_fs_size(&lfs) => 8;
    // this mkdir should both create a dir and deorphan, so size
    // should be unchanged
    lfs_mkdir(&lfs, "parent/otherchild") => 0;
    lfs_stat(&lfs, "parent/orphan", &info) => LFS_ERR_NOENT;
    lfs_stat(&lfs, "parent/child", &info) => 0;
    lfs_stat(&lfs, "parent/otherchild", &info) => 0;
    lfs_fs_size(&lfs) => 8;
    lfs_unmount(&lfs) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_stat(&lfs, "parent/orphan", &info) => LFS_ERR_NOENT;
    lfs_stat(&lfs, "parent/child", &info) => 0;
    lfs_stat(&lfs, "parent/otherchild", &info) => 0;
    lfs_fs_size(&lfs) => 8;
    lfs_unmount(&lfs) => 0;
'''