[INFO] updating cached repository https://github.com/stay-on-main/fs_test
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 16c1b875d90774c2f27d07c9fa5b7f33072640bb
[INFO] checking stay-on-main/fs_test against master#fdc0011561c6365c596dfd8fa1ef388162bc89c7 for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstay-on-main%2Ffs_test" "/workspace/builds/worker-13/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stay-on-main/fs_test on toolchain fdc0011561c6365c596dfd8fa1ef388162bc89c7
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/stay-on-main/fs_test
[INFO] finished tweaking git repo https://github.com/stay-on-main/fs_test
[INFO] tweaked toml for git repo https://github.com/stay-on-main/fs_test written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/stay-on-main/fs_test already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 15afcc909a67dde03318a951d0c1b82b992516f28287feebff832d58fc11a792
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "15afcc909a67dde03318a951d0c1b82b992516f28287feebff832d58fc11a792"`
[INFO] [stderr]     Checking fat_table v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/fs/disk_cacher.rs:6:15
[INFO] [stderr]   |
[INFO] [stderr] 6 |     disk: &'a Disk,
[INFO] [stderr]   |               ^^^^ help: use `dyn`: `dyn Disk`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/fs/disk_cacher.rs:15:23
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn new(disk: &Disk) -> DiskCacher {
[INFO] [stderr]    |                       ^^^^ help: use `dyn`: `dyn Disk`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Path`
[INFO] [stderr]  --> src/fs/dir_entry.rs:3:19
[INFO] [stderr]   |
[INFO] [stderr] 3 | use super::path::{Path};
[INFO] [stderr]   |                   ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `File`
[INFO] [stderr]   --> src/fs/mod.rs:11:12
[INFO] [stderr]    |
[INFO] [stderr] 11 | use file::{File};
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Path`
[INFO] [stderr]   --> src/fs/mod.rs:14:12
[INFO] [stderr]    |
[INFO] [stderr] 14 | use path::{Path};
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/fs/mod.rs:46:21
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn new(io: &Disk) -> Fs {
[INFO] [stderr]    |                     ^^^^ help: use `dyn`: `dyn Disk`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `DirEntryType`
[INFO] [stderr]  --> src/main.rs:3:31
[INFO] [stderr]   |
[INFO] [stderr] 3 | use fs::dir_entry::{DirEntry, DirEntryType};
[INFO] [stderr]   |                               ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/fs/disk_cacher.rs:6:15
[INFO] [stderr]   |
[INFO] [stderr] 6 |     disk: &'a Disk,
[INFO] [stderr]   |               ^^^^ help: use `dyn`: `dyn Disk`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/fs/disk_cacher.rs:15:23
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn new(disk: &Disk) -> DiskCacher {
[INFO] [stderr]    |                       ^^^^ help: use `dyn`: `dyn Disk`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Path`
[INFO] [stderr]  --> src/fs/dir_entry.rs:3:19
[INFO] [stderr]   |
[INFO] [stderr] 3 | use super::path::{Path};
[INFO] [stderr]   |                   ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `File`
[INFO] [stderr]   --> src/fs/mod.rs:11:12
[INFO] [stderr]    |
[INFO] [stderr] 11 | use file::{File};
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Path`
[INFO] [stderr]   --> src/fs/mod.rs:14:12
[INFO] [stderr]    |
[INFO] [stderr] 14 | use path::{Path};
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/fs/mod.rs:46:21
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn new(io: &Disk) -> Fs {
[INFO] [stderr]    |                     ^^^^ help: use `dyn`: `dyn Disk`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `DirEntryType`
[INFO] [stderr]  --> src/main.rs:3:31
[INFO] [stderr]   |
[INFO] [stderr] 3 | use fs::dir_entry::{DirEntry, DirEntryType};
[INFO] [stderr]   |                               ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_mut`
[INFO] [stderr]   --> src/fs/disk_cacher.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn get_mut(&mut self, id: u32) -> &mut [u8] {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `ATTR_VOLUME_ID`
[INFO] [stderr]  --> src/fs/dir_entry.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | const ATTR_VOLUME_ID: u8 = 0x08;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `size`
[INFO] [stderr]   --> src/fs/dir_entry.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     size: u32,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `attr`
[INFO] [stderr]   --> src/fs/dir_entry.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     attr: u8,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `DirEntryType`
[INFO] [stderr]    --> src/fs/dir_entry.rs:114:10
[INFO] [stderr]     |
[INFO] [stderr] 114 | pub enum DirEntryType {
[INFO] [stderr]     |          ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print`
[INFO] [stderr]    --> src/fs/dir_entry.rs:131:5
[INFO] [stderr]     |
[INFO] [stderr] 131 |     pub fn print(&self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_type`
[INFO] [stderr]    --> src/fs/dir_entry.rs:143:5
[INFO] [stderr]     |
[INFO] [stderr] 143 |     pub fn get_type(&self) -> DirEntryType {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `file_open`
[INFO] [stderr]    --> src/fs/dir_entry.rs:153:5
[INFO] [stderr]     |
[INFO] [stderr] 153 |     pub fn file_open(&self) -> Option<file::File<'a>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find`
[INFO] [stderr]    --> src/fs/dir_entry.rs:188:5
[INFO] [stderr]     |
[INFO] [stderr] 188 |     pub fn find(&'a self, name: &[u8]) -> Option<DirEntry> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `File`
[INFO] [stderr]  --> src/fs/file.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct File<'a> {
[INFO] [stderr]   |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read`
[INFO] [stderr]   --> src/fs/file.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn read(&mut self, buffer: &'b mut [u8]) -> Option<&'b[u8]> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tell`
[INFO] [stderr]   --> src/fs/file.rs:67:5
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn tell(&self) -> u32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `seek`
[INFO] [stderr]   --> src/fs/file.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn seek(&mut self, pos: u32) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `new`
[INFO] [stderr]   --> src/fs/file.rs:94:8
[INFO] [stderr]    |
[INFO] [stderr] 94 | pub fn new<'a>(fs: &'a Fs<'a>, size: u32, cluster: u32) -> File {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `u16_from_bytes`
[INFO] [stderr]  --> src/fs/fat_table.rs:3:4
[INFO] [stderr]   |
[INFO] [stderr] 3 | fn u16_from_bytes(bytes: &[u8]) -> u16 {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `u32_to_bytes`
[INFO] [stderr]   --> src/fs/fat_table.rs:12:4
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn u32_to_bytes(bytes: &mut [u8], val: u32) {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `num`
[INFO] [stderr]   --> src/fs/fat_table.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     num: u32,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set`
[INFO] [stderr]   --> src/fs/fat_table.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn set(&self, io: &mut DiskCacher, cluster: u32, val: u32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `chain_create`
[INFO] [stderr]   --> src/fs/fat_table.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn chain_create(&self, io: &mut DiskCacher) -> Option<u32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `chain_delete`
[INFO] [stderr]   --> src/fs/fat_table.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     pub fn chain_delete(&self, io: &mut DiskCacher, cluster: u32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `chain_truncate`
[INFO] [stderr]   --> src/fs/fat_table.rs:90:5
[INFO] [stderr]    |
[INFO] [stderr] 90 |     pub fn chain_truncate(&self, io: &mut DiskCacher, cluster: u32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `chain_extend`
[INFO] [stderr]    --> src/fs/fat_table.rs:101:5
[INFO] [stderr]     |
[INFO] [stderr] 101 |     pub fn chain_extend(&self, io: &mut DiskCacher, cluster: u32) -> Option<u32> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_mut`
[INFO] [stderr]   --> src/fs/disk_cacher.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn get_mut(&mut self, id: u32) -> &mut [u8] {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `ATTR_VOLUME_ID`
[INFO] [stderr]  --> src/fs/dir_entry.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | const ATTR_VOLUME_ID: u8 = 0x08;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `size`
[INFO] [stderr]   --> src/fs/dir_entry.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     size: u32,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `attr`
[INFO] [stderr]   --> src/fs/dir_entry.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     attr: u8,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `DirEntryType`
[INFO] [stderr]    --> src/fs/dir_entry.rs:114:10
[INFO] [stderr]     |
[INFO] [stderr] 114 | pub enum DirEntryType {
[INFO] [stderr]     |          ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print`
[INFO] [stderr]    --> src/fs/dir_entry.rs:131:5
[INFO] [stderr]     |
[INFO] [stderr] 131 |     pub fn print(&self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_type`
[INFO] [stderr]    --> src/fs/dir_entry.rs:143:5
[INFO] [stderr]     |
[INFO] [stderr] 143 |     pub fn get_type(&self) -> DirEntryType {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `file_open`
[INFO] [stderr]    --> src/fs/dir_entry.rs:153:5
[INFO] [stderr]     |
[INFO] [stderr] 153 |     pub fn file_open(&self) -> Option<file::File<'a>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find`
[INFO] [stderr]    --> src/fs/dir_entry.rs:188:5
[INFO] [stderr]     |
[INFO] [stderr] 188 |     pub fn find(&'a self, name: &[u8]) -> Option<DirEntry> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `File`
[INFO] [stderr]  --> src/fs/file.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct File<'a> {
[INFO] [stderr]   |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read`
[INFO] [stderr]   --> src/fs/file.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn read(&mut self, buffer: &'b mut [u8]) -> Option<&'b[u8]> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tell`
[INFO] [stderr]   --> src/fs/file.rs:67:5
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn tell(&self) -> u32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `seek`
[INFO] [stderr]   --> src/fs/file.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn seek(&mut self, pos: u32) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `new`
[INFO] [stderr]   --> src/fs/file.rs:94:8
[INFO] [stderr]    |
[INFO] [stderr] 94 | pub fn new<'a>(fs: &'a Fs<'a>, size: u32, cluster: u32) -> File {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `u16_from_bytes`
[INFO] [stderr]  --> src/fs/fat_table.rs:3:4
[INFO] [stderr]   |
[INFO] [stderr] 3 | fn u16_from_bytes(bytes: &[u8]) -> u16 {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `u32_to_bytes`
[INFO] [stderr]   --> src/fs/fat_table.rs:12:4
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn u32_to_bytes(bytes: &mut [u8], val: u32) {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `num`
[INFO] [stderr]   --> src/fs/fat_table.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     num: u32,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set`
[INFO] [stderr]   --> src/fs/fat_table.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn set(&self, io: &mut DiskCacher, cluster: u32, val: u32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `chain_create`
[INFO] [stderr]   --> src/fs/fat_table.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn chain_create(&self, io: &mut DiskCacher) -> Option<u32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `chain_delete`
[INFO] [stderr]   --> src/fs/fat_table.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     pub fn chain_delete(&self, io: &mut DiskCacher, cluster: u32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `chain_truncate`
[INFO] [stderr]   --> src/fs/fat_table.rs:90:5
[INFO] [stderr]    |
[INFO] [stderr] 90 |     pub fn chain_truncate(&self, io: &mut DiskCacher, cluster: u32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `chain_extend`
[INFO] [stderr]    --> src/fs/fat_table.rs:101:5
[INFO] [stderr]     |
[INFO] [stderr] 101 |     pub fn chain_extend(&self, io: &mut DiskCacher, cluster: u32) -> Option<u32> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.34s
[INFO] running `"docker" "inspect" "15afcc909a67dde03318a951d0c1b82b992516f28287feebff832d58fc11a792"`
[INFO] running `"docker" "rm" "-f" "15afcc909a67dde03318a951d0c1b82b992516f28287feebff832d58fc11a792"`
[INFO] [stdout] 15afcc909a67dde03318a951d0c1b82b992516f28287feebff832d58fc11a792