Dec 17 15:31:49.385 INFO checking shiroyasha/rust-too-many-lists against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 15:31:49.385 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/shiroyasha/rust-too-many-lists:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 15:31:49.850 INFO [stdout] 067842e3ddb23d8b447d1a74a3dbda7a6803406ae32a26558a340f0a2adfbd83
Dec 17 15:31:49.858 INFO running `"docker" "start" "-a" "067842e3ddb23d8b447d1a74a3dbda7a6803406ae32a26558a340f0a2adfbd83"`
Dec 17 15:31:51.064 INFO [stderr]     Checking rust-too-many-lists v0.1.0 (/opt/crater/workdir)
Dec 17 15:31:51.316 INFO [stderr] warning: struct is never constructed: `List`
Dec 17 15:31:51.316 INFO [stderr]  --> src/first.rs:3:1
Dec 17 15:31:51.316 INFO [stderr]   |
Dec 17 15:31:51.316 INFO [stderr] 3 | pub struct List {
Dec 17 15:31:51.316 INFO [stderr]   | ^^^^^^^^^^^^^^^
Dec 17 15:31:51.316 INFO [stderr]   |
Dec 17 15:31:51.316 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 17 15:31:51.316 INFO [stderr] 
Dec 17 15:31:51.316 INFO [stderr] warning: variant is never constructed: `More`
Dec 17 15:31:51.316 INFO [stderr]  --> src/first.rs:9:5
Dec 17 15:31:51.316 INFO [stderr]   |
Dec 17 15:31:51.316 INFO [stderr] 9 |     More(Box<Node>),
Dec 17 15:31:51.316 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 17 15:31:51.316 INFO [stderr] 
Dec 17 15:31:51.316 INFO [stderr] warning: field is never used: `elem`
Dec 17 15:31:51.316 INFO [stderr]   --> src/first.rs:13:5
Dec 17 15:31:51.316 INFO [stderr]    |
Dec 17 15:31:51.316 INFO [stderr] 13 |     elem: i32,
Dec 17 15:31:51.316 INFO [stderr]    |     ^^^^^^^^^
Dec 17 15:31:51.316 INFO [stderr] 
Dec 17 15:31:51.316 INFO [stderr] warning: method is never used: `new`
Dec 17 15:31:51.316 INFO [stderr]   --> src/first.rs:18:5
Dec 17 15:31:51.316 INFO [stderr]    |
Dec 17 15:31:51.316 INFO [stderr] 18 |     pub fn new() -> Self {
Dec 17 15:31:51.316 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.316 INFO [stderr] 
Dec 17 15:31:51.316 INFO [stderr] warning: method is never used: `push`
Dec 17 15:31:51.316 INFO [stderr]   --> src/first.rs:22:5
Dec 17 15:31:51.316 INFO [stderr]    |
Dec 17 15:31:51.316 INFO [stderr] 22 |     pub fn push(&mut self, elem: i32) {
Dec 17 15:31:51.316 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.316 INFO [stderr] 
Dec 17 15:31:51.316 INFO [stderr] warning: method is never used: `pop`
Dec 17 15:31:51.316 INFO [stderr]   --> src/first.rs:31:5
Dec 17 15:31:51.316 INFO [stderr]    |
Dec 17 15:31:51.316 INFO [stderr] 31 |     pub fn pop(&mut self) -> Option<i32> {
Dec 17 15:31:51.316 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.316 INFO [stderr] 
Dec 17 15:31:51.316 INFO [stderr] warning: type alias is never used: `Link`
Dec 17 15:31:51.316 INFO [stderr]  --> src/second.rs:7:1
Dec 17 15:31:51.316 INFO [stderr]   |
Dec 17 15:31:51.316 INFO [stderr] 7 | type Link<T> = Option<Box<Node<T>>>;
Dec 17 15:31:51.316 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.316 INFO [stderr] 
Dec 17 15:31:51.316 INFO [stderr] warning: struct is never constructed: `Node`
Dec 17 15:31:51.316 INFO [stderr]  --> src/second.rs:9:1
Dec 17 15:31:51.316 INFO [stderr]   |
Dec 17 15:31:51.316 INFO [stderr] 9 | struct Node<T> {
Dec 17 15:31:51.316 INFO [stderr]   | ^^^^^^^^^^^^^^
Dec 17 15:31:51.316 INFO [stderr] 
Dec 17 15:31:51.316 INFO [stderr] warning: method is never used: `new`
Dec 17 15:31:51.316 INFO [stderr]   --> src/second.rs:15:5
Dec 17 15:31:51.316 INFO [stderr]    |
Dec 17 15:31:51.317 INFO [stderr] 15 |     pub fn new() -> Self {
Dec 17 15:31:51.317 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.317 INFO [stderr] 
Dec 17 15:31:51.317 INFO [stderr] warning: method is never used: `push`
Dec 17 15:31:51.317 INFO [stderr]   --> src/second.rs:19:5
Dec 17 15:31:51.317 INFO [stderr]    |
Dec 17 15:31:51.317 INFO [stderr] 19 |     pub fn push(&mut self, elem: T) {
Dec 17 15:31:51.317 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.317 INFO [stderr] 
Dec 17 15:31:51.317 INFO [stderr] warning: method is never used: `peek`
Dec 17 15:31:51.317 INFO [stderr]   --> src/second.rs:37:5
Dec 17 15:31:51.317 INFO [stderr]    |
Dec 17 15:31:51.317 INFO [stderr] 37 |     pub fn peek(&self) -> Option<&T> {
Dec 17 15:31:51.317 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.317 INFO [stderr] 
Dec 17 15:31:51.317 INFO [stderr] warning: method is never used: `peek_mut`
Dec 17 15:31:51.317 INFO [stderr]   --> src/second.rs:43:5
Dec 17 15:31:51.317 INFO [stderr]    |
Dec 17 15:31:51.317 INFO [stderr] 43 |     pub fn peek_mut(&mut self) -> Option<&mut T> {
Dec 17 15:31:51.317 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.317 INFO [stderr] 
Dec 17 15:31:51.317 INFO [stderr] warning: struct is never constructed: `IntoIter`
Dec 17 15:31:51.317 INFO [stderr]   --> src/second.rs:60:1
Dec 17 15:31:51.317 INFO [stderr]    |
Dec 17 15:31:51.317 INFO [stderr] 60 | pub struct IntoIter<T>(List<T>);
Dec 17 15:31:51.317 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.317 INFO [stderr] 
Dec 17 15:31:51.317 INFO [stderr] warning: method is never used: `into_iter`
Dec 17 15:31:51.317 INFO [stderr]   --> src/second.rs:63:5
Dec 17 15:31:51.317 INFO [stderr]    |
Dec 17 15:31:51.317 INFO [stderr] 63 |     pub fn into_iter(self) -> IntoIter<T> {
Dec 17 15:31:51.317 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.317 INFO [stderr] 
Dec 17 15:31:51.317 INFO [stderr] warning: struct is never constructed: `Iter`
Dec 17 15:31:51.317 INFO [stderr]   --> src/second.rs:76:1
Dec 17 15:31:51.317 INFO [stderr]    |
Dec 17 15:31:51.317 INFO [stderr] 76 | pub struct Iter<'a, T: 'a> {
Dec 17 15:31:51.317 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.317 INFO [stderr] 
Dec 17 15:31:51.317 INFO [stderr] warning: method is never used: `iter`
Dec 17 15:31:51.317 INFO [stderr]   --> src/second.rs:81:5
Dec 17 15:31:51.317 INFO [stderr]    |
Dec 17 15:31:51.317 INFO [stderr] 81 |     pub fn iter<'a>(&'a self) -> Iter<'a, T> {
Dec 17 15:31:51.317 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.317 INFO [stderr] 
Dec 17 15:31:51.317 INFO [stderr] warning: struct is never constructed: `Tree`
Dec 17 15:31:51.317 INFO [stderr]  --> src/treeee.rs:1:1
Dec 17 15:31:51.317 INFO [stderr]   |
Dec 17 15:31:51.317 INFO [stderr] 1 | pub struct Tree<'a> {
Dec 17 15:31:51.317 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.317 INFO [stderr] 
Dec 17 15:31:51.317 INFO [stderr] warning: type alias is never used: `Link`
Dec 17 15:31:51.317 INFO [stderr]  --> src/treeee.rs:5:1
Dec 17 15:31:51.317 INFO [stderr]   |
Dec 17 15:31:51.317 INFO [stderr] 5 | type Link<'a> = Option<Box<Node<'a>>>;
Dec 17 15:31:51.317 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.317 INFO [stderr] 
Dec 17 15:31:51.317 INFO [stderr] warning: struct is never constructed: `Node`
Dec 17 15:31:51.317 INFO [stderr]  --> src/treeee.rs:7:1
Dec 17 15:31:51.317 INFO [stderr]   |
Dec 17 15:31:51.317 INFO [stderr] 7 | struct Node<'a> {
Dec 17 15:31:51.317 INFO [stderr]   | ^^^^^^^^^^^^^^^
Dec 17 15:31:51.317 INFO [stderr] 
Dec 17 15:31:51.317 INFO [stderr] warning: method is never used: `new`
Dec 17 15:31:51.317 INFO [stderr]   --> src/treeee.rs:14:5
Dec 17 15:31:51.317 INFO [stderr]    |
Dec 17 15:31:51.317 INFO [stderr] 14 |     pub fn new() -> Self {
Dec 17 15:31:51.317 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.317 INFO [stderr] 
Dec 17 15:31:51.317 INFO [stderr] warning: method is never used: `add`
Dec 17 15:31:51.317 INFO [stderr]   --> src/treeee.rs:18:5
Dec 17 15:31:51.317 INFO [stderr]    |
Dec 17 15:31:51.317 INFO [stderr] 18 |     pub fn add(&mut self, value: &'a str) {
Dec 17 15:31:51.317 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.317 INFO [stderr] 
Dec 17 15:31:51.317 INFO [stderr] warning: method is never used: `display`
Dec 17 15:31:51.317 INFO [stderr]   --> src/treeee.rs:31:5
Dec 17 15:31:51.317 INFO [stderr]    |
Dec 17 15:31:51.317 INFO [stderr] 31 |     pub fn display(&self) {
Dec 17 15:31:51.317 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.317 INFO [stderr] 
Dec 17 15:31:51.317 INFO [stderr] warning: method is never used: `insert`
Dec 17 15:31:51.317 INFO [stderr]   --> src/treeee.rs:35:5
Dec 17 15:31:51.317 INFO [stderr]    |
Dec 17 15:31:51.317 INFO [stderr] 35 |     fn insert(head: &mut Node<'a>, new_node : Box<Node<'a>>) {
Dec 17 15:31:51.317 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.317 INFO [stderr] 
Dec 17 15:31:51.317 INFO [stderr] warning: method is never used: `display_node`
Dec 17 15:31:51.317 INFO [stderr]   --> src/treeee.rs:49:5
Dec 17 15:31:51.317 INFO [stderr]    |
Dec 17 15:31:51.317 INFO [stderr] 49 |     fn display_node(node : &Node, depth: i32) {
Dec 17 15:31:51.317 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.317 INFO [stderr] 
Dec 17 15:31:51.317 INFO [stderr] warning: struct is never constructed: `Collection`
Dec 17 15:31:51.318 INFO [stderr]  --> src/four.rs:3:1
Dec 17 15:31:51.318 INFO [stderr]   |
Dec 17 15:31:51.318 INFO [stderr] 3 | struct Collection<'a> {
Dec 17 15:31:51.318 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.318 INFO [stderr] 
Dec 17 15:31:51.318 INFO [stderr] warning: struct is never constructed: `Elem`
Dec 17 15:31:51.318 INFO [stderr]  --> src/four.rs:8:1
Dec 17 15:31:51.318 INFO [stderr]   |
Dec 17 15:31:51.318 INFO [stderr] 8 | struct Elem<'a> {
Dec 17 15:31:51.318 INFO [stderr]   | ^^^^^^^^^^^^^^^
Dec 17 15:31:51.318 INFO [stderr] 
Dec 17 15:31:51.318 INFO [stderr] warning: function is never used: `insert`
Dec 17 15:31:51.318 INFO [stderr]   --> src/four.rs:12:1
Dec 17 15:31:51.318 INFO [stderr]    |
Dec 17 15:31:51.318 INFO [stderr] 12 | fn insert<'a>(c : &mut Collection<'a>, e : Box<Elem<'a>>) {
Dec 17 15:31:51.318 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.318 INFO [stderr] 
Dec 17 15:31:51.318 INFO [stderr] warning: function is never used: `a`
Dec 17 15:31:51.318 INFO [stderr]   --> src/four.rs:17:1
Dec 17 15:31:51.318 INFO [stderr]    |
Dec 17 15:31:51.318 INFO [stderr] 17 | fn a<'a>() -> Collection<'a> {
Dec 17 15:31:51.318 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:31:51.318 INFO [stderr] 
Dec 17 15:31:51.664 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
Dec 17 15:31:52.416 INFO running `"docker" "inspect" "067842e3ddb23d8b447d1a74a3dbda7a6803406ae32a26558a340f0a2adfbd83"`
Dec 17 15:31:52.720 INFO running `"docker" "rm" "-f" "067842e3ddb23d8b447d1a74a3dbda7a6803406ae32a26558a340f0a2adfbd83"`
Dec 17 15:31:53.048 INFO [stdout] 067842e3ddb23d8b447d1a74a3dbda7a6803406ae32a26558a340f0a2adfbd83