Dec 11 09:37:44.445 INFO checking shiroyasha/rust-too-many-lists against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 09:37:44.445 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-6/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-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 11 09:37:44.954 INFO [stdout] f60e947496676a76259278a088cfeab69deed57d74e9218ba4b01b4086bb48c0
Dec 11 09:37:44.973 INFO running `"docker" "start" "-a" "f60e947496676a76259278a088cfeab69deed57d74e9218ba4b01b4086bb48c0"`
Dec 11 09:37:46.517 INFO [stderr] usermod: no changes
Dec 11 09:37:46.576 INFO [stderr]     Checking rust-too-many-lists v0.1.0 (/source)
Dec 11 09:37:46.926 INFO [stderr] warning: struct is never constructed: `List`
Dec 11 09:37:46.926 INFO [stderr]  --> src/first.rs:3:1
Dec 11 09:37:46.926 INFO [stderr]   |
Dec 11 09:37:46.926 INFO [stderr] 3 | pub struct List {
Dec 11 09:37:46.926 INFO [stderr]   | ^^^^^^^^^^^^^^^
Dec 11 09:37:46.926 INFO [stderr]   |
Dec 11 09:37:46.926 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 11 09:37:46.926 INFO [stderr] 
Dec 11 09:37:46.926 INFO [stderr] warning: variant is never constructed: `More`
Dec 11 09:37:46.926 INFO [stderr]  --> src/first.rs:9:5
Dec 11 09:37:46.926 INFO [stderr]   |
Dec 11 09:37:46.926 INFO [stderr] 9 |     More(Box<Node>),
Dec 11 09:37:46.926 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 11 09:37:46.926 INFO [stderr] 
Dec 11 09:37:46.926 INFO [stderr] warning: field is never used: `elem`
Dec 11 09:37:46.926 INFO [stderr]   --> src/first.rs:13:5
Dec 11 09:37:46.926 INFO [stderr]    |
Dec 11 09:37:46.926 INFO [stderr] 13 |     elem: i32,
Dec 11 09:37:46.926 INFO [stderr]    |     ^^^^^^^^^
Dec 11 09:37:46.926 INFO [stderr] 
Dec 11 09:37:46.926 INFO [stderr] warning: method is never used: `new`
Dec 11 09:37:46.926 INFO [stderr]   --> src/first.rs:18:5
Dec 11 09:37:46.926 INFO [stderr]    |
Dec 11 09:37:46.926 INFO [stderr] 18 |     pub fn new() -> Self {
Dec 11 09:37:46.926 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.926 INFO [stderr] 
Dec 11 09:37:46.926 INFO [stderr] warning: method is never used: `push`
Dec 11 09:37:46.926 INFO [stderr]   --> src/first.rs:22:5
Dec 11 09:37:46.926 INFO [stderr]    |
Dec 11 09:37:46.926 INFO [stderr] 22 |     pub fn push(&mut self, elem: i32) {
Dec 11 09:37:46.927 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.927 INFO [stderr] 
Dec 11 09:37:46.927 INFO [stderr] warning: method is never used: `pop`
Dec 11 09:37:46.927 INFO [stderr]   --> src/first.rs:31:5
Dec 11 09:37:46.927 INFO [stderr]    |
Dec 11 09:37:46.927 INFO [stderr] 31 |     pub fn pop(&mut self) -> Option<i32> {
Dec 11 09:37:46.927 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.927 INFO [stderr] 
Dec 11 09:37:46.927 INFO [stderr] warning: type alias is never used: `Link`
Dec 11 09:37:46.927 INFO [stderr]  --> src/second.rs:7:1
Dec 11 09:37:46.927 INFO [stderr]   |
Dec 11 09:37:46.927 INFO [stderr] 7 | type Link<T> = Option<Box<Node<T>>>;
Dec 11 09:37:46.927 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.927 INFO [stderr] 
Dec 11 09:37:46.927 INFO [stderr] warning: struct is never constructed: `Node`
Dec 11 09:37:46.927 INFO [stderr]  --> src/second.rs:9:1
Dec 11 09:37:46.927 INFO [stderr]   |
Dec 11 09:37:46.927 INFO [stderr] 9 | struct Node<T> {
Dec 11 09:37:46.927 INFO [stderr]   | ^^^^^^^^^^^^^^
Dec 11 09:37:46.927 INFO [stderr] 
Dec 11 09:37:46.927 INFO [stderr] warning: method is never used: `new`
Dec 11 09:37:46.927 INFO [stderr]   --> src/second.rs:15:5
Dec 11 09:37:46.927 INFO [stderr]    |
Dec 11 09:37:46.927 INFO [stderr] 15 |     pub fn new() -> Self {
Dec 11 09:37:46.927 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.927 INFO [stderr] 
Dec 11 09:37:46.927 INFO [stderr] warning: method is never used: `push`
Dec 11 09:37:46.927 INFO [stderr]   --> src/second.rs:19:5
Dec 11 09:37:46.927 INFO [stderr]    |
Dec 11 09:37:46.927 INFO [stderr] 19 |     pub fn push(&mut self, elem: T) {
Dec 11 09:37:46.927 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.927 INFO [stderr] 
Dec 11 09:37:46.927 INFO [stderr] warning: method is never used: `peek`
Dec 11 09:37:46.927 INFO [stderr]   --> src/second.rs:37:5
Dec 11 09:37:46.927 INFO [stderr]    |
Dec 11 09:37:46.927 INFO [stderr] 37 |     pub fn peek(&self) -> Option<&T> {
Dec 11 09:37:46.927 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.927 INFO [stderr] 
Dec 11 09:37:46.927 INFO [stderr] warning: method is never used: `peek_mut`
Dec 11 09:37:46.927 INFO [stderr]   --> src/second.rs:43:5
Dec 11 09:37:46.927 INFO [stderr]    |
Dec 11 09:37:46.927 INFO [stderr] 43 |     pub fn peek_mut(&mut self) -> Option<&mut T> {
Dec 11 09:37:46.927 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.927 INFO [stderr] 
Dec 11 09:37:46.927 INFO [stderr] warning: struct is never constructed: `IntoIter`
Dec 11 09:37:46.927 INFO [stderr]   --> src/second.rs:60:1
Dec 11 09:37:46.927 INFO [stderr]    |
Dec 11 09:37:46.927 INFO [stderr] 60 | pub struct IntoIter<T>(List<T>);
Dec 11 09:37:46.927 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.927 INFO [stderr] 
Dec 11 09:37:46.927 INFO [stderr] warning: method is never used: `into_iter`
Dec 11 09:37:46.927 INFO [stderr]   --> src/second.rs:63:5
Dec 11 09:37:46.927 INFO [stderr]    |
Dec 11 09:37:46.927 INFO [stderr] 63 |     pub fn into_iter(self) -> IntoIter<T> {
Dec 11 09:37:46.927 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.927 INFO [stderr] 
Dec 11 09:37:46.927 INFO [stderr] warning: struct is never constructed: `Iter`
Dec 11 09:37:46.927 INFO [stderr]   --> src/second.rs:76:1
Dec 11 09:37:46.927 INFO [stderr]    |
Dec 11 09:37:46.927 INFO [stderr] 76 | pub struct Iter<'a, T: 'a> {
Dec 11 09:37:46.927 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.927 INFO [stderr] 
Dec 11 09:37:46.927 INFO [stderr] warning: method is never used: `iter`
Dec 11 09:37:46.927 INFO [stderr]   --> src/second.rs:81:5
Dec 11 09:37:46.927 INFO [stderr]    |
Dec 11 09:37:46.927 INFO [stderr] 81 |     pub fn iter<'a>(&'a self) -> Iter<'a, T> {
Dec 11 09:37:46.927 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.927 INFO [stderr] 
Dec 11 09:37:46.927 INFO [stderr] warning: struct is never constructed: `Tree`
Dec 11 09:37:46.927 INFO [stderr]  --> src/treeee.rs:1:1
Dec 11 09:37:46.927 INFO [stderr]   |
Dec 11 09:37:46.927 INFO [stderr] 1 | pub struct Tree<'a> {
Dec 11 09:37:46.927 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.927 INFO [stderr] 
Dec 11 09:37:46.927 INFO [stderr] warning: type alias is never used: `Link`
Dec 11 09:37:46.927 INFO [stderr]  --> src/treeee.rs:5:1
Dec 11 09:37:46.927 INFO [stderr]   |
Dec 11 09:37:46.927 INFO [stderr] 5 | type Link<'a> = Option<Box<Node<'a>>>;
Dec 11 09:37:46.927 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.927 INFO [stderr] 
Dec 11 09:37:46.927 INFO [stderr] warning: struct is never constructed: `Node`
Dec 11 09:37:46.927 INFO [stderr]  --> src/treeee.rs:7:1
Dec 11 09:37:46.927 INFO [stderr]   |
Dec 11 09:37:46.927 INFO [stderr] 7 | struct Node<'a> {
Dec 11 09:37:46.927 INFO [stderr]   | ^^^^^^^^^^^^^^^
Dec 11 09:37:46.928 INFO [stderr] 
Dec 11 09:37:46.928 INFO [stderr] warning: method is never used: `new`
Dec 11 09:37:46.928 INFO [stderr]   --> src/treeee.rs:14:5
Dec 11 09:37:46.928 INFO [stderr]    |
Dec 11 09:37:46.928 INFO [stderr] 14 |     pub fn new() -> Self {
Dec 11 09:37:46.928 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.928 INFO [stderr] 
Dec 11 09:37:46.928 INFO [stderr] warning: method is never used: `add`
Dec 11 09:37:46.928 INFO [stderr]   --> src/treeee.rs:18:5
Dec 11 09:37:46.928 INFO [stderr]    |
Dec 11 09:37:46.928 INFO [stderr] 18 |     pub fn add(&mut self, value: &'a str) {
Dec 11 09:37:46.928 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.928 INFO [stderr] 
Dec 11 09:37:46.928 INFO [stderr] warning: method is never used: `display`
Dec 11 09:37:46.928 INFO [stderr]   --> src/treeee.rs:31:5
Dec 11 09:37:46.928 INFO [stderr]    |
Dec 11 09:37:46.928 INFO [stderr] 31 |     pub fn display(&self) {
Dec 11 09:37:46.928 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.928 INFO [stderr] 
Dec 11 09:37:46.928 INFO [stderr] warning: method is never used: `insert`
Dec 11 09:37:46.928 INFO [stderr]   --> src/treeee.rs:35:5
Dec 11 09:37:46.928 INFO [stderr]    |
Dec 11 09:37:46.928 INFO [stderr] 35 |     fn insert(head: &mut Node<'a>, new_node : Box<Node<'a>>) {
Dec 11 09:37:46.928 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.928 INFO [stderr] 
Dec 11 09:37:46.928 INFO [stderr] warning: method is never used: `display_node`
Dec 11 09:37:46.928 INFO [stderr]   --> src/treeee.rs:49:5
Dec 11 09:37:46.928 INFO [stderr]    |
Dec 11 09:37:46.928 INFO [stderr] 49 |     fn display_node(node : &Node, depth: i32) {
Dec 11 09:37:46.928 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.928 INFO [stderr] 
Dec 11 09:37:46.928 INFO [stderr] warning: struct is never constructed: `Collection`
Dec 11 09:37:46.928 INFO [stderr]  --> src/four.rs:3:1
Dec 11 09:37:46.928 INFO [stderr]   |
Dec 11 09:37:46.928 INFO [stderr] 3 | struct Collection<'a> {
Dec 11 09:37:46.928 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.928 INFO [stderr] 
Dec 11 09:37:46.928 INFO [stderr] warning: struct is never constructed: `Elem`
Dec 11 09:37:46.928 INFO [stderr]  --> src/four.rs:8:1
Dec 11 09:37:46.928 INFO [stderr]   |
Dec 11 09:37:46.928 INFO [stderr] 8 | struct Elem<'a> {
Dec 11 09:37:46.928 INFO [stderr]   | ^^^^^^^^^^^^^^^
Dec 11 09:37:46.928 INFO [stderr] 
Dec 11 09:37:46.928 INFO [stderr] warning: function is never used: `insert`
Dec 11 09:37:46.928 INFO [stderr]   --> src/four.rs:12:1
Dec 11 09:37:46.928 INFO [stderr]    |
Dec 11 09:37:46.928 INFO [stderr] 12 | fn insert<'a>(c : &mut Collection<'a>, e : Box<Elem<'a>>) {
Dec 11 09:37:46.928 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.928 INFO [stderr] 
Dec 11 09:37:46.928 INFO [stderr] warning: function is never used: `a`
Dec 11 09:37:46.928 INFO [stderr]   --> src/four.rs:17:1
Dec 11 09:37:46.928 INFO [stderr]    |
Dec 11 09:37:46.928 INFO [stderr] 17 | fn a<'a>() -> Collection<'a> {
Dec 11 09:37:46.928 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:37:46.928 INFO [stderr] 
Dec 11 09:37:47.148 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.59s
Dec 11 09:37:47.148 INFO [stderr] su: No module specific data is present
Dec 11 09:37:47.816 INFO running `"docker" "inspect" "f60e947496676a76259278a088cfeab69deed57d74e9218ba4b01b4086bb48c0"`
Dec 11 09:37:48.134 INFO running `"docker" "rm" "-f" "f60e947496676a76259278a088cfeab69deed57d74e9218ba4b01b4086bb48c0"`
Dec 11 09:37:48.448 INFO [stdout] f60e947496676a76259278a088cfeab69deed57d74e9218ba4b01b4086bb48c0