[INFO] cloning repository shiroyasha/rust-too-many-lists
[INFO] running `"git" "clone" "--bare" "git://github.com/shiroyasha/rust-too-many-lists.git" "work/cache/sources/gh/shiroyasha/rust-too-many-lists"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/shiroyasha/rust-too-many-lists'...
[INFO] running `"git" "clone" "work/cache/sources/gh/shiroyasha/rust-too-many-lists" "work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/shiroyasha/rust-too-many-lists"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/shiroyasha/rust-too-many-lists'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/shiroyasha/rust-too-many-lists" "work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/shiroyasha/rust-too-many-lists"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/shiroyasha/rust-too-many-lists'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ecb394b3200df168f4a95e0051bb810ffb4d7cf6
[INFO] sha for GitHub repo shiroyasha/rust-too-many-lists: ecb394b3200df168f4a95e0051bb810ffb4d7cf6
[INFO] validating manifest of shiroyasha/rust-too-many-lists on toolchain master#c0086b9e8972fef9fd4af24bae20d45021ed06c6
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of shiroyasha/rust-too-many-lists on toolchain try#290ac7b29f41ff9fa5232f9a1116ea71a3501063
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing shiroyasha/rust-too-many-lists
[INFO] finished frobbing shiroyasha/rust-too-many-lists
[INFO] frobbed toml for shiroyasha/rust-too-many-lists written to work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/shiroyasha/rust-too-many-lists/Cargo.toml
[INFO] started frobbing shiroyasha/rust-too-many-lists
[INFO] finished frobbing shiroyasha/rust-too-many-lists
[INFO] frobbed toml for shiroyasha/rust-too-many-lists written to work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/shiroyasha/rust-too-many-lists/Cargo.toml
[INFO] crate shiroyasha/rust-too-many-lists has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking shiroyasha/rust-too-many-lists against master#c0086b9e8972fef9fd4af24bae20d45021ed06c6 for pr-58899
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58899/worker-0/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/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" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b7cfa5a9cc4152ba0d08c9a0b407b86be45d9a320db724b82087ff98ee3e083b
[INFO] running `"docker" "start" "-a" "b7cfa5a9cc4152ba0d08c9a0b407b86be45d9a320db724b82087ff98ee3e083b"`
[INFO] [stderr]     Checking rust-too-many-lists v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `List`
[INFO] [stderr]  --> src/first.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct List {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `More`
[INFO] [stderr]  --> src/first.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     More(Box<Node>),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `elem`
[INFO] [stderr]   --> src/first.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     elem: i32,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/first.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn new() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push`
[INFO] [stderr]   --> src/first.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn push(&mut self, elem: i32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop`
[INFO] [stderr]   --> src/first.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn pop(&mut self) -> Option<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Link`
[INFO] [stderr]  --> src/second.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | type Link<T> = Option<Box<Node<T>>>;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Node`
[INFO] [stderr]  --> src/second.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | struct Node<T> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/second.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn new() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push`
[INFO] [stderr]   --> src/second.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     pub fn push(&mut self, elem: T) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek`
[INFO] [stderr]   --> src/second.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn peek(&self) -> Option<&T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_mut`
[INFO] [stderr]   --> src/second.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn peek_mut(&mut self) -> Option<&mut T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `IntoIter`
[INFO] [stderr]   --> src/second.rs:60:1
[INFO] [stderr]    |
[INFO] [stderr] 60 | pub struct IntoIter<T>(List<T>);
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `into_iter`
[INFO] [stderr]   --> src/second.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn into_iter(self) -> IntoIter<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Iter`
[INFO] [stderr]   --> src/second.rs:76:1
[INFO] [stderr]    |
[INFO] [stderr] 76 | pub struct Iter<'a, T: 'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `iter`
[INFO] [stderr]   --> src/second.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     pub fn iter<'a>(&'a self) -> Iter<'a, T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Tree`
[INFO] [stderr]  --> src/treeee.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Tree<'a> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Link`
[INFO] [stderr]  --> src/treeee.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | type Link<'a> = Option<Box<Node<'a>>>;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Node`
[INFO] [stderr]  --> src/treeee.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | struct Node<'a> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/treeee.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn new() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]   --> src/treeee.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn add(&mut self, value: &'a str) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `display`
[INFO] [stderr]   --> src/treeee.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn display(&self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert`
[INFO] [stderr]   --> src/treeee.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     fn insert(head: &mut Node<'a>, new_node : Box<Node<'a>>) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `display_node`
[INFO] [stderr]   --> src/treeee.rs:49:5
[INFO] [stderr]    |
[INFO] [stderr] 49 |     fn display_node(node : &Node, depth: i32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Collection`
[INFO] [stderr]  --> src/four.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct Collection<'a> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Elem`
[INFO] [stderr]  --> src/four.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | struct Elem<'a> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `insert`
[INFO] [stderr]   --> src/four.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn insert<'a>(c : &mut Collection<'a>, e : Box<Elem<'a>>) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `a`
[INFO] [stderr]   --> src/four.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn a<'a>() -> Collection<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `"docker" "inspect" "b7cfa5a9cc4152ba0d08c9a0b407b86be45d9a320db724b82087ff98ee3e083b"`
[INFO] running `"docker" "rm" "-f" "b7cfa5a9cc4152ba0d08c9a0b407b86be45d9a320db724b82087ff98ee3e083b"`
[INFO] [stdout] b7cfa5a9cc4152ba0d08c9a0b407b86be45d9a320db724b82087ff98ee3e083b