Dec 04 10:58:35.656 INFO checking ryota-sakamoto/rust_study against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 10:58:35.656 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-6/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1df97983eb2057dc6a8f7eb364e263b51ae23230-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 04 10:58:36.171 INFO [stdout] 1ec768b5dde25f3bc48593094efc36ea88029a96efea249b8fc6183dc4ad9b2e
Dec 04 10:58:36.173 INFO running `"docker" "start" "-a" "1ec768b5dde25f3bc48593094efc36ea88029a96efea249b8fc6183dc4ad9b2e"`
Dec 04 10:58:37.487 INFO [stderr] usermod: no changes
Dec 04 10:58:37.563 INFO [stderr]     Checking rust_test v0.1.0 (/source)
Dec 04 10:58:37.903 INFO [stderr] warning: unused macro definition
Dec 04 10:58:37.903 INFO [stderr]   --> src/list.rs:53:1
Dec 04 10:58:37.903 INFO [stderr]    |
Dec 04 10:58:37.903 INFO [stderr] 53 | / macro_rules! list {
Dec 04 10:58:37.903 INFO [stderr] 54 | |     ($($n: expr),*) => {
Dec 04 10:58:37.903 INFO [stderr] 55 | |         {
Dec 04 10:58:37.903 INFO [stderr] 56 | |             let mut list = List::empty_list();
Dec 04 10:58:37.903 INFO [stderr] ...  |
Dec 04 10:58:37.903 INFO [stderr] 74 | |     };
Dec 04 10:58:37.903 INFO [stderr] 75 | | }
Dec 04 10:58:37.903 INFO [stderr]    | |_^
Dec 04 10:58:37.903 INFO [stderr]    |
Dec 04 10:58:37.903 INFO [stderr]    = note: #[warn(unused_macros)] on by default
Dec 04 10:58:37.903 INFO [stderr] 
Dec 04 10:58:37.913 INFO [stderr] warning: unused macro definition
Dec 04 10:58:37.913 INFO [stderr]   --> src/list.rs:53:1
Dec 04 10:58:37.913 INFO [stderr]    |
Dec 04 10:58:37.913 INFO [stderr] 53 | / macro_rules! list {
Dec 04 10:58:37.913 INFO [stderr] 54 | |     ($($n: expr),*) => {
Dec 04 10:58:37.913 INFO [stderr] 55 | |         {
Dec 04 10:58:37.913 INFO [stderr] 56 | |             let mut list = List::empty_list();
Dec 04 10:58:37.913 INFO [stderr] ...  |
Dec 04 10:58:37.913 INFO [stderr] 74 | |     };
Dec 04 10:58:37.913 INFO [stderr] 75 | | }
Dec 04 10:58:37.913 INFO [stderr]    | |_^
Dec 04 10:58:37.913 INFO [stderr]    |
Dec 04 10:58:37.913 INFO [stderr]    = note: #[warn(unused_macros)] on by default
Dec 04 10:58:37.913 INFO [stderr] 
Dec 04 10:58:37.975 INFO [stderr] warning: function is never used: `call`
Dec 04 10:58:37.975 INFO [stderr]  --> src/module.rs:1:1
Dec 04 10:58:37.975 INFO [stderr]   |
Dec 04 10:58:37.975 INFO [stderr] 1 | pub fn call() {
Dec 04 10:58:37.975 INFO [stderr]   | ^^^^^^^^^^^^^
Dec 04 10:58:37.975 INFO [stderr]   |
Dec 04 10:58:37.975 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 04 10:58:37.975 INFO [stderr] 
Dec 04 10:58:37.975 INFO [stderr] warning: enum is never used: `List`
Dec 04 10:58:37.975 INFO [stderr]  --> src/list.rs:4:1
Dec 04 10:58:37.975 INFO [stderr]   |
Dec 04 10:58:37.975 INFO [stderr] 4 | pub enum List<T: Debug> {
Dec 04 10:58:37.975 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:37.975 INFO [stderr] 
Dec 04 10:58:37.975 INFO [stderr] warning: method is never used: `empty_list`
Dec 04 10:58:37.975 INFO [stderr]   --> src/list.rs:13:5
Dec 04 10:58:37.975 INFO [stderr]    |
Dec 04 10:58:37.975 INFO [stderr] 13 |     pub fn empty_list() -> List<T> {
Dec 04 10:58:37.975 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:37.975 INFO [stderr] 
Dec 04 10:58:37.975 INFO [stderr] warning: method is never used: `prepend`
Dec 04 10:58:37.975 INFO [stderr]   --> src/list.rs:17:5
Dec 04 10:58:37.975 INFO [stderr]    |
Dec 04 10:58:37.975 INFO [stderr] 17 |     pub fn prepend(self, t: T) -> Self {
Dec 04 10:58:37.975 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:37.975 INFO [stderr] 
Dec 04 10:58:37.975 INFO [stderr] warning: method is never used: `head`
Dec 04 10:58:37.975 INFO [stderr]   --> src/list.rs:24:5
Dec 04 10:58:37.975 INFO [stderr]    |
Dec 04 10:58:37.976 INFO [stderr] 24 |     pub fn head(&self) -> &T {
Dec 04 10:58:37.976 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:37.976 INFO [stderr] 
Dec 04 10:58:37.976 INFO [stderr] warning: method is never used: `last`
Dec 04 10:58:37.976 INFO [stderr]   --> src/list.rs:31:5
Dec 04 10:58:37.976 INFO [stderr]    |
Dec 04 10:58:37.976 INFO [stderr] 31 |     pub fn last(&self) -> &T {
Dec 04 10:58:37.976 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:37.976 INFO [stderr] 
Dec 04 10:58:37.976 INFO [stderr] warning: method is never used: `is_empty`
Dec 04 10:58:37.976 INFO [stderr]   --> src/list.rs:44:5
Dec 04 10:58:37.976 INFO [stderr]    |
Dec 04 10:58:37.976 INFO [stderr] 44 |     fn is_empty(&self) -> bool {
Dec 04 10:58:37.976 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:37.976 INFO [stderr] 
Dec 04 10:58:37.976 INFO [stderr] warning: function is never used: `tailrec`
Dec 04 10:58:37.976 INFO [stderr]   --> src/list.rs:87:1
Dec 04 10:58:37.976 INFO [stderr]    |
Dec 04 10:58:37.976 INFO [stderr] 87 | fn tailrec<T: Debug>(list: &List<T>) {
Dec 04 10:58:37.976 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:37.976 INFO [stderr] 
Dec 04 10:58:37.976 INFO [stderr] warning: function is never used: `call`
Dec 04 10:58:37.976 INFO [stderr]  --> src/module.rs:1:1
Dec 04 10:58:37.976 INFO [stderr]   |
Dec 04 10:58:37.976 INFO [stderr] 1 | pub fn call() {
Dec 04 10:58:37.976 INFO [stderr]   | ^^^^^^^^^^^^^
Dec 04 10:58:37.976 INFO [stderr]   |
Dec 04 10:58:37.976 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 04 10:58:37.976 INFO [stderr] 
Dec 04 10:58:37.976 INFO [stderr] warning: enum is never used: `List`
Dec 04 10:58:37.976 INFO [stderr]  --> src/list.rs:4:1
Dec 04 10:58:37.976 INFO [stderr]   |
Dec 04 10:58:37.976 INFO [stderr] 4 | pub enum List<T: Debug> {
Dec 04 10:58:37.976 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:37.976 INFO [stderr] 
Dec 04 10:58:37.976 INFO [stderr] warning: method is never used: `empty_list`
Dec 04 10:58:37.976 INFO [stderr]   --> src/list.rs:13:5
Dec 04 10:58:37.976 INFO [stderr]    |
Dec 04 10:58:37.976 INFO [stderr] 13 |     pub fn empty_list() -> List<T> {
Dec 04 10:58:37.976 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:37.976 INFO [stderr] 
Dec 04 10:58:37.976 INFO [stderr] warning: method is never used: `prepend`
Dec 04 10:58:37.976 INFO [stderr]   --> src/list.rs:17:5
Dec 04 10:58:37.976 INFO [stderr]    |
Dec 04 10:58:37.976 INFO [stderr] 17 |     pub fn prepend(self, t: T) -> Self {
Dec 04 10:58:37.976 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:37.976 INFO [stderr] 
Dec 04 10:58:37.976 INFO [stderr] warning: method is never used: `head`
Dec 04 10:58:37.976 INFO [stderr]   --> src/list.rs:24:5
Dec 04 10:58:37.976 INFO [stderr]    |
Dec 04 10:58:37.976 INFO [stderr] 24 |     pub fn head(&self) -> &T {
Dec 04 10:58:37.976 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:37.976 INFO [stderr] 
Dec 04 10:58:37.976 INFO [stderr] warning: method is never used: `last`
Dec 04 10:58:37.976 INFO [stderr]   --> src/list.rs:31:5
Dec 04 10:58:37.976 INFO [stderr]    |
Dec 04 10:58:37.976 INFO [stderr] 31 |     pub fn last(&self) -> &T {
Dec 04 10:58:37.976 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:37.976 INFO [stderr] 
Dec 04 10:58:37.976 INFO [stderr] warning: method is never used: `is_empty`
Dec 04 10:58:37.976 INFO [stderr]   --> src/list.rs:44:5
Dec 04 10:58:37.976 INFO [stderr]    |
Dec 04 10:58:37.976 INFO [stderr] 44 |     fn is_empty(&self) -> bool {
Dec 04 10:58:37.976 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:37.976 INFO [stderr] 
Dec 04 10:58:37.976 INFO [stderr] warning: function is never used: `tailrec`
Dec 04 10:58:37.976 INFO [stderr]   --> src/list.rs:87:1
Dec 04 10:58:37.976 INFO [stderr]    |
Dec 04 10:58:37.976 INFO [stderr] 87 | fn tailrec<T: Debug>(list: &List<T>) {
Dec 04 10:58:37.976 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:37.976 INFO [stderr] 
Dec 04 10:58:37.991 INFO [stderr] warning: the `head:` in this pattern is redundant
Dec 04 10:58:37.991 INFO [stderr]   --> src/list.rs:27:26
Dec 04 10:58:37.991 INFO [stderr]    |
Dec 04 10:58:37.991 INFO [stderr] 27 |             &List::List {head: ref head, tail: _} => head,
Dec 04 10:58:37.991 INFO [stderr]    |                          -----^^^^^^^^^
Dec 04 10:58:37.991 INFO [stderr]    |                          |
Dec 04 10:58:37.991 INFO [stderr]    |                          help: remove this
Dec 04 10:58:37.991 INFO [stderr]    |
Dec 04 10:58:37.991 INFO [stderr]    = note: #[warn(non_shorthand_field_patterns)] on by default
Dec 04 10:58:37.991 INFO [stderr] 
Dec 04 10:58:37.991 INFO [stderr] warning: the `head:` in this pattern is redundant
Dec 04 10:58:37.991 INFO [stderr]   --> src/list.rs:34:26
Dec 04 10:58:37.991 INFO [stderr]    |
Dec 04 10:58:37.991 INFO [stderr] 34 |             &List::List {head: ref head, tail: ref tail} => {
Dec 04 10:58:37.991 INFO [stderr]    |                          -----^^^^^^^^^
Dec 04 10:58:37.991 INFO [stderr]    |                          |
Dec 04 10:58:37.991 INFO [stderr]    |                          help: remove this
Dec 04 10:58:37.991 INFO [stderr] 
Dec 04 10:58:37.991 INFO [stderr] warning: the `tail:` in this pattern is redundant
Dec 04 10:58:37.991 INFO [stderr]   --> src/list.rs:34:42
Dec 04 10:58:37.991 INFO [stderr]    |
Dec 04 10:58:37.991 INFO [stderr] 34 |             &List::List {head: ref head, tail: ref tail} => {
Dec 04 10:58:37.991 INFO [stderr]    |                                          -----^^^^^^^^^
Dec 04 10:58:37.991 INFO [stderr]    |                                          |
Dec 04 10:58:37.991 INFO [stderr]    |                                          help: remove this
Dec 04 10:58:37.991 INFO [stderr] 
Dec 04 10:58:37.991 INFO [stderr] warning: the `head:` in this pattern is redundant
Dec 04 10:58:37.991 INFO [stderr]   --> src/list.rs:90:22
Dec 04 10:58:37.991 INFO [stderr]    |
Dec 04 10:58:37.991 INFO [stderr] 90 |         &List::List {head: ref head, tail: ref tail} => {
Dec 04 10:58:37.991 INFO [stderr]    |                      -----^^^^^^^^^
Dec 04 10:58:37.991 INFO [stderr]    |                      |
Dec 04 10:58:37.991 INFO [stderr]    |                      help: remove this
Dec 04 10:58:37.991 INFO [stderr] 
Dec 04 10:58:37.991 INFO [stderr] warning: the `tail:` in this pattern is redundant
Dec 04 10:58:37.991 INFO [stderr]   --> src/list.rs:90:38
Dec 04 10:58:37.991 INFO [stderr]    |
Dec 04 10:58:37.991 INFO [stderr] 90 |         &List::List {head: ref head, tail: ref tail} => {
Dec 04 10:58:37.991 INFO [stderr]    |                                      -----^^^^^^^^^
Dec 04 10:58:37.991 INFO [stderr]    |                                      |
Dec 04 10:58:37.991 INFO [stderr]    |                                      help: remove this
Dec 04 10:58:37.991 INFO [stderr] 
Dec 04 10:58:37.995 INFO [stderr] warning: the `head:` in this pattern is redundant
Dec 04 10:58:37.995 INFO [stderr]   --> src/list.rs:27:26
Dec 04 10:58:37.995 INFO [stderr]    |
Dec 04 10:58:37.995 INFO [stderr] 27 |             &List::List {head: ref head, tail: _} => head,
Dec 04 10:58:37.995 INFO [stderr]    |                          -----^^^^^^^^^
Dec 04 10:58:37.995 INFO [stderr]    |                          |
Dec 04 10:58:37.995 INFO [stderr]    |                          help: remove this
Dec 04 10:58:37.995 INFO [stderr]    |
Dec 04 10:58:37.995 INFO [stderr]    = note: #[warn(non_shorthand_field_patterns)] on by default
Dec 04 10:58:37.995 INFO [stderr] 
Dec 04 10:58:37.995 INFO [stderr] warning: the `head:` in this pattern is redundant
Dec 04 10:58:37.995 INFO [stderr]   --> src/list.rs:34:26
Dec 04 10:58:37.995 INFO [stderr]    |
Dec 04 10:58:37.995 INFO [stderr] 34 |             &List::List {head: ref head, tail: ref tail} => {
Dec 04 10:58:37.995 INFO [stderr]    |                          -----^^^^^^^^^
Dec 04 10:58:37.995 INFO [stderr]    |                          |
Dec 04 10:58:37.995 INFO [stderr]    |                          help: remove this
Dec 04 10:58:37.995 INFO [stderr] 
Dec 04 10:58:37.995 INFO [stderr] warning: the `tail:` in this pattern is redundant
Dec 04 10:58:37.995 INFO [stderr]   --> src/list.rs:34:42
Dec 04 10:58:37.995 INFO [stderr]    |
Dec 04 10:58:37.995 INFO [stderr] 34 |             &List::List {head: ref head, tail: ref tail} => {
Dec 04 10:58:37.995 INFO [stderr]    |                                          -----^^^^^^^^^
Dec 04 10:58:37.995 INFO [stderr]    |                                          |
Dec 04 10:58:37.995 INFO [stderr]    |                                          help: remove this
Dec 04 10:58:37.995 INFO [stderr] 
Dec 04 10:58:37.995 INFO [stderr] warning: the `head:` in this pattern is redundant
Dec 04 10:58:37.995 INFO [stderr]   --> src/list.rs:90:22
Dec 04 10:58:37.995 INFO [stderr]    |
Dec 04 10:58:37.995 INFO [stderr] 90 |         &List::List {head: ref head, tail: ref tail} => {
Dec 04 10:58:37.995 INFO [stderr]    |                      -----^^^^^^^^^
Dec 04 10:58:37.995 INFO [stderr]    |                      |
Dec 04 10:58:37.995 INFO [stderr]    |                      help: remove this
Dec 04 10:58:37.995 INFO [stderr] 
Dec 04 10:58:37.995 INFO [stderr] warning: the `tail:` in this pattern is redundant
Dec 04 10:58:37.995 INFO [stderr]   --> src/list.rs:90:38
Dec 04 10:58:37.995 INFO [stderr]    |
Dec 04 10:58:37.995 INFO [stderr] 90 |         &List::List {head: ref head, tail: ref tail} => {
Dec 04 10:58:37.995 INFO [stderr]    |                                      -----^^^^^^^^^
Dec 04 10:58:37.995 INFO [stderr]    |                                      |
Dec 04 10:58:37.995 INFO [stderr]    |                                      help: remove this
Dec 04 10:58:37.995 INFO [stderr] 
Dec 04 10:58:38.471 INFO [stderr] warning: unused macro definition
Dec 04 10:58:38.471 INFO [stderr]   --> src/list.rs:53:1
Dec 04 10:58:38.471 INFO [stderr]    |
Dec 04 10:58:38.471 INFO [stderr] 53 | / macro_rules! list {
Dec 04 10:58:38.471 INFO [stderr] 54 | |     ($($n: expr),*) => {
Dec 04 10:58:38.471 INFO [stderr] 55 | |         {
Dec 04 10:58:38.471 INFO [stderr] 56 | |             let mut list = List::empty_list();
Dec 04 10:58:38.471 INFO [stderr] ...  |
Dec 04 10:58:38.471 INFO [stderr] 74 | |     };
Dec 04 10:58:38.471 INFO [stderr] 75 | | }
Dec 04 10:58:38.471 INFO [stderr]    | |_^
Dec 04 10:58:38.471 INFO [stderr]    |
Dec 04 10:58:38.471 INFO [stderr]    = note: #[warn(unused_macros)] on by default
Dec 04 10:58:38.471 INFO [stderr] 
Dec 04 10:58:38.479 INFO [stderr] warning: unused macro definition
Dec 04 10:58:38.479 INFO [stderr]   --> src/list.rs:53:1
Dec 04 10:58:38.479 INFO [stderr]    |
Dec 04 10:58:38.479 INFO [stderr] 53 | / macro_rules! list {
Dec 04 10:58:38.479 INFO [stderr] 54 | |     ($($n: expr),*) => {
Dec 04 10:58:38.479 INFO [stderr] 55 | |         {
Dec 04 10:58:38.479 INFO [stderr] 56 | |             let mut list = List::empty_list();
Dec 04 10:58:38.479 INFO [stderr] ...  |
Dec 04 10:58:38.479 INFO [stderr] 74 | |     };
Dec 04 10:58:38.479 INFO [stderr] 75 | | }
Dec 04 10:58:38.479 INFO [stderr]    | |_^
Dec 04 10:58:38.479 INFO [stderr]    |
Dec 04 10:58:38.479 INFO [stderr]    = note: #[warn(unused_macros)] on by default
Dec 04 10:58:38.479 INFO [stderr] 
Dec 04 10:58:38.627 INFO [stderr] warning: method is never used: `head`
Dec 04 10:58:38.627 INFO [stderr]   --> src/list.rs:24:5
Dec 04 10:58:38.627 INFO [stderr]    |
Dec 04 10:58:38.627 INFO [stderr] 24 |     pub fn head(&self) -> &T {
Dec 04 10:58:38.627 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:38.627 INFO [stderr]    |
Dec 04 10:58:38.627 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 10:58:38.627 INFO [stderr] 
Dec 04 10:58:38.627 INFO [stderr] warning: method is never used: `last`
Dec 04 10:58:38.627 INFO [stderr]   --> src/list.rs:31:5
Dec 04 10:58:38.627 INFO [stderr]    |
Dec 04 10:58:38.627 INFO [stderr] 31 |     pub fn last(&self) -> &T {
Dec 04 10:58:38.627 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:38.627 INFO [stderr] 
Dec 04 10:58:38.627 INFO [stderr] warning: method is never used: `is_empty`
Dec 04 10:58:38.627 INFO [stderr]   --> src/list.rs:44:5
Dec 04 10:58:38.627 INFO [stderr]    |
Dec 04 10:58:38.627 INFO [stderr] 44 |     fn is_empty(&self) -> bool {
Dec 04 10:58:38.627 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:38.627 INFO [stderr] 
Dec 04 10:58:38.627 INFO [stderr] warning: function is never used: `tailrec`
Dec 04 10:58:38.627 INFO [stderr]   --> src/list.rs:87:1
Dec 04 10:58:38.627 INFO [stderr]    |
Dec 04 10:58:38.627 INFO [stderr] 87 | fn tailrec<T: Debug>(list: &List<T>) {
Dec 04 10:58:38.627 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:38.627 INFO [stderr] 
Dec 04 10:58:38.627 INFO [stderr] warning: the `head:` in this pattern is redundant
Dec 04 10:58:38.627 INFO [stderr]   --> src/list.rs:27:26
Dec 04 10:58:38.627 INFO [stderr]    |
Dec 04 10:58:38.627 INFO [stderr] 27 |             &List::List {head: ref head, tail: _} => head,
Dec 04 10:58:38.627 INFO [stderr]    |                          -----^^^^^^^^^
Dec 04 10:58:38.627 INFO [stderr]    |                          |
Dec 04 10:58:38.627 INFO [stderr]    |                          help: remove this
Dec 04 10:58:38.627 INFO [stderr]    |
Dec 04 10:58:38.627 INFO [stderr]    = note: #[warn(non_shorthand_field_patterns)] on by default
Dec 04 10:58:38.627 INFO [stderr] 
Dec 04 10:58:38.627 INFO [stderr] warning: the `head:` in this pattern is redundant
Dec 04 10:58:38.627 INFO [stderr]   --> src/list.rs:34:26
Dec 04 10:58:38.627 INFO [stderr]    |
Dec 04 10:58:38.627 INFO [stderr] 34 |             &List::List {head: ref head, tail: ref tail} => {
Dec 04 10:58:38.627 INFO [stderr]    |                          -----^^^^^^^^^
Dec 04 10:58:38.627 INFO [stderr]    |                          |
Dec 04 10:58:38.627 INFO [stderr]    |                          help: remove this
Dec 04 10:58:38.627 INFO [stderr] 
Dec 04 10:58:38.627 INFO [stderr] warning: the `tail:` in this pattern is redundant
Dec 04 10:58:38.627 INFO [stderr]   --> src/list.rs:34:42
Dec 04 10:58:38.627 INFO [stderr]    |
Dec 04 10:58:38.627 INFO [stderr] 34 |             &List::List {head: ref head, tail: ref tail} => {
Dec 04 10:58:38.627 INFO [stderr]    |                                          -----^^^^^^^^^
Dec 04 10:58:38.627 INFO [stderr]    |                                          |
Dec 04 10:58:38.627 INFO [stderr]    |                                          help: remove this
Dec 04 10:58:38.627 INFO [stderr] 
Dec 04 10:58:38.627 INFO [stderr] warning: the `head:` in this pattern is redundant
Dec 04 10:58:38.627 INFO [stderr]   --> src/list.rs:90:22
Dec 04 10:58:38.627 INFO [stderr]    |
Dec 04 10:58:38.627 INFO [stderr] 90 |         &List::List {head: ref head, tail: ref tail} => {
Dec 04 10:58:38.627 INFO [stderr]    |                      -----^^^^^^^^^
Dec 04 10:58:38.627 INFO [stderr]    |                      |
Dec 04 10:58:38.627 INFO [stderr]    |                      help: remove this
Dec 04 10:58:38.627 INFO [stderr] 
Dec 04 10:58:38.627 INFO [stderr] warning: the `tail:` in this pattern is redundant
Dec 04 10:58:38.628 INFO [stderr]   --> src/list.rs:90:38
Dec 04 10:58:38.628 INFO [stderr]    |
Dec 04 10:58:38.628 INFO [stderr] 90 |         &List::List {head: ref head, tail: ref tail} => {
Dec 04 10:58:38.628 INFO [stderr]    |                                      -----^^^^^^^^^
Dec 04 10:58:38.628 INFO [stderr]    |                                      |
Dec 04 10:58:38.628 INFO [stderr]    |                                      help: remove this
Dec 04 10:58:38.628 INFO [stderr] 
Dec 04 10:58:38.663 INFO [stderr] warning: method is never used: `head`
Dec 04 10:58:38.663 INFO [stderr]   --> src/list.rs:24:5
Dec 04 10:58:38.663 INFO [stderr]    |
Dec 04 10:58:38.663 INFO [stderr] 24 |     pub fn head(&self) -> &T {
Dec 04 10:58:38.663 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:38.664 INFO [stderr]    |
Dec 04 10:58:38.664 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 10:58:38.664 INFO [stderr] 
Dec 04 10:58:38.664 INFO [stderr] warning: method is never used: `last`
Dec 04 10:58:38.664 INFO [stderr]   --> src/list.rs:31:5
Dec 04 10:58:38.664 INFO [stderr]    |
Dec 04 10:58:38.664 INFO [stderr] 31 |     pub fn last(&self) -> &T {
Dec 04 10:58:38.664 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:38.664 INFO [stderr] 
Dec 04 10:58:38.664 INFO [stderr] warning: method is never used: `is_empty`
Dec 04 10:58:38.664 INFO [stderr]   --> src/list.rs:44:5
Dec 04 10:58:38.664 INFO [stderr]    |
Dec 04 10:58:38.664 INFO [stderr] 44 |     fn is_empty(&self) -> bool {
Dec 04 10:58:38.664 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:38.664 INFO [stderr] 
Dec 04 10:58:38.664 INFO [stderr] warning: function is never used: `tailrec`
Dec 04 10:58:38.664 INFO [stderr]   --> src/list.rs:87:1
Dec 04 10:58:38.664 INFO [stderr]    |
Dec 04 10:58:38.664 INFO [stderr] 87 | fn tailrec<T: Debug>(list: &List<T>) {
Dec 04 10:58:38.664 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:58:38.664 INFO [stderr] 
Dec 04 10:58:38.664 INFO [stderr] warning: the `head:` in this pattern is redundant
Dec 04 10:58:38.664 INFO [stderr]   --> src/list.rs:27:26
Dec 04 10:58:38.664 INFO [stderr]    |
Dec 04 10:58:38.664 INFO [stderr] 27 |             &List::List {head: ref head, tail: _} => head,
Dec 04 10:58:38.664 INFO [stderr]    |                          -----^^^^^^^^^
Dec 04 10:58:38.664 INFO [stderr]    |                          |
Dec 04 10:58:38.664 INFO [stderr]    |                          help: remove this
Dec 04 10:58:38.664 INFO [stderr]    |
Dec 04 10:58:38.664 INFO [stderr]    = note: #[warn(non_shorthand_field_patterns)] on by default
Dec 04 10:58:38.666 INFO [stderr] 
Dec 04 10:58:38.666 INFO [stderr] warning: the `head:` in this pattern is redundant
Dec 04 10:58:38.666 INFO [stderr]   --> src/list.rs:34:26
Dec 04 10:58:38.666 INFO [stderr]    |
Dec 04 10:58:38.666 INFO [stderr] 34 |             &List::List {head: ref head, tail: ref tail} => {
Dec 04 10:58:38.666 INFO [stderr]    |                          -----^^^^^^^^^
Dec 04 10:58:38.666 INFO [stderr]    |                          |
Dec 04 10:58:38.666 INFO [stderr]    |                          help: remove this
Dec 04 10:58:38.666 INFO [stderr] 
Dec 04 10:58:38.666 INFO [stderr] warning: the `tail:` in this pattern is redundant
Dec 04 10:58:38.666 INFO [stderr]   --> src/list.rs:34:42
Dec 04 10:58:38.666 INFO [stderr]    |
Dec 04 10:58:38.666 INFO [stderr] 34 |             &List::List {head: ref head, tail: ref tail} => {
Dec 04 10:58:38.666 INFO [stderr]    |                                          -----^^^^^^^^^
Dec 04 10:58:38.666 INFO [stderr]    |                                          |
Dec 04 10:58:38.666 INFO [stderr]    |                                          help: remove this
Dec 04 10:58:38.666 INFO [stderr] 
Dec 04 10:58:38.666 INFO [stderr] warning: the `head:` in this pattern is redundant
Dec 04 10:58:38.666 INFO [stderr]   --> src/list.rs:90:22
Dec 04 10:58:38.666 INFO [stderr]    |
Dec 04 10:58:38.666 INFO [stderr] 90 |         &List::List {head: ref head, tail: ref tail} => {
Dec 04 10:58:38.666 INFO [stderr]    |                      -----^^^^^^^^^
Dec 04 10:58:38.666 INFO [stderr]    |                      |
Dec 04 10:58:38.666 INFO [stderr]    |                      help: remove this
Dec 04 10:58:38.666 INFO [stderr] 
Dec 04 10:58:38.666 INFO [stderr] warning: the `tail:` in this pattern is redundant
Dec 04 10:58:38.666 INFO [stderr]   --> src/list.rs:90:38
Dec 04 10:58:38.666 INFO [stderr]    |
Dec 04 10:58:38.666 INFO [stderr] 90 |         &List::List {head: ref head, tail: ref tail} => {
Dec 04 10:58:38.666 INFO [stderr]    |                                      -----^^^^^^^^^
Dec 04 10:58:38.666 INFO [stderr]    |                                      |
Dec 04 10:58:38.666 INFO [stderr]    |                                      help: remove this
Dec 04 10:58:38.666 INFO [stderr] 
Dec 04 10:58:38.681 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.16s
Dec 04 10:58:38.687 INFO [stderr] su: No module specific data is present
Dec 04 10:58:39.806 INFO running `"docker" "inspect" "1ec768b5dde25f3bc48593094efc36ea88029a96efea249b8fc6183dc4ad9b2e"`
Dec 04 10:58:40.209 INFO running `"docker" "rm" "-f" "1ec768b5dde25f3bc48593094efc36ea88029a96efea249b8fc6183dc4ad9b2e"`
Dec 04 10:58:40.523 INFO [stdout] 1ec768b5dde25f3bc48593094efc36ea88029a96efea249b8fc6183dc4ad9b2e