[INFO] updating cached repository xudifsd/hello_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/xudifsd/hello_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/xudifsd/hello_rust" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/xudifsd/hello_rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/xudifsd/hello_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/xudifsd/hello_rust" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/xudifsd/hello_rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/xudifsd/hello_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d1c4fcff6c7f1c77bde570e02c1c576e424011e9
[INFO] sha for GitHub repo xudifsd/hello_rust: d1c4fcff6c7f1c77bde570e02c1c576e424011e9
[INFO] validating manifest of xudifsd/hello_rust on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of xudifsd/hello_rust on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing xudifsd/hello_rust
[INFO] finished frobbing xudifsd/hello_rust
[INFO] frobbed toml for xudifsd/hello_rust written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/xudifsd/hello_rust/Cargo.toml
[INFO] started frobbing xudifsd/hello_rust
[INFO] finished frobbing xudifsd/hello_rust
[INFO] frobbed toml for xudifsd/hello_rust written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/xudifsd/hello_rust/Cargo.toml
[INFO] crate xudifsd/hello_rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking xudifsd/hello_rust against master#60960a260f7b5c695fd0717311d72ce62dd4eb43 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-4/master#60960a260f7b5c695fd0717311d72ce62dd4eb43:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/xudifsd/hello_rust:/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" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 8bcc363ee8fd81ce736ff5302eb4d36bc6721173f94cc40ee02ca4ef307a8b3c
[INFO] running `"docker" "start" "-a" "8bcc363ee8fd81ce736ff5302eb4d36bc6721173f94cc40ee02ca4ef307a8b3c"`
[INFO] [stderr]     Checking hello_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `tree`
[INFO] [stderr]   --> src/tree.rs:80:9
[INFO] [stderr]    |
[INFO] [stderr] 80 |     use tree::Tree;
[INFO] [stderr]    |         ^^^^ maybe a missing crate `tree`?
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `hello_rust`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]    --> src/main.rs:232:1
[INFO] [stderr]     |
[INFO] [stderr] 232 | / macro_rules! assert_some_and_eq {
[INFO] [stderr] 233 | |     ($exp: expr, $val: expr) => {
[INFO] [stderr] 234 | |         if let Some(x) = $exp {
[INFO] [stderr] 235 | |             assert_eq!(x, $val);
[INFO] [stderr] ...   |
[INFO] [stderr] 239 | |     }
[INFO] [stderr] 240 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_macros)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rc2`
[INFO] [stderr]    --> src/main.rs:288:17
[INFO] [stderr]     |
[INFO] [stderr] 288 |             let rc2 = rc1.clone();
[INFO] [stderr]     |                 ^^^ help: consider prefixing with an underscore: `_rc2`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `val`
[INFO] [stderr]    --> src/main.rs:274:5
[INFO] [stderr]     |
[INFO] [stderr] 274 |     val: i32,
[INFO] [stderr]     |     ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rc2`
[INFO] [stderr]    --> src/main.rs:288:17
[INFO] [stderr]     |
[INFO] [stderr] 288 |             let rc2 = rc1.clone();
[INFO] [stderr]     |                 ^^^ help: consider prefixing with an underscore: `_rc2`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Node`
[INFO] [stderr]   --> src/main.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | struct Node<'a, T> where T: 'a {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/main.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn new(val: &'a T) -> Node<'a, T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert`
[INFO] [stderr]   --> src/main.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub fn insert(&mut self, val: &'a T) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Circle`
[INFO] [stderr]   --> src/main.rs:53:1
[INFO] [stderr]    |
[INFO] [stderr] 53 | struct Circle {
[INFO] [stderr]    | ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Square`
[INFO] [stderr]   --> src/main.rs:63:1
[INFO] [stderr]    |
[INFO] [stderr] 63 | struct Square {
[INFO] [stderr]    | ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_area`
[INFO] [stderr]   --> src/main.rs:73:1
[INFO] [stderr]    |
[INFO] [stderr] 73 | fn get_area<T>(t: T) -> f64 where T: HasArea {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ListNode`
[INFO] [stderr]    --> src/main.rs:109:1
[INFO] [stderr]     |
[INFO] [stderr] 109 | struct ListNode<'a, T> where T: PartialOrd + 'a {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `List`
[INFO] [stderr]    --> src/main.rs:114:1
[INFO] [stderr]     |
[INFO] [stderr] 114 | struct List<'a, T> where T: PartialOrd + 'a {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/main.rs:119:5
[INFO] [stderr]     |
[INFO] [stderr] 119 |     fn new() -> List<'a, T> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert`
[INFO] [stderr]    --> src/main.rs:122:5
[INFO] [stderr]     |
[INFO] [stderr] 122 |     fn insert(&mut self, val: &'a T) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop`
[INFO] [stderr]    --> src/main.rs:127:5
[INFO] [stderr]     |
[INFO] [stderr] 127 |     fn pop(&mut self) -> Option<&'a T> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reverse`
[INFO] [stderr]    --> src/main.rs:139:5
[INFO] [stderr]     |
[INFO] [stderr] 139 |     fn reverse(mut self) -> List<'a, T> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `StackFrame`
[INFO] [stderr]    --> src/main.rs:200:1
[INFO] [stderr]     |
[INFO] [stderr] 200 | struct StackFrame<T> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Stack`
[INFO] [stderr]    --> src/main.rs:205:1
[INFO] [stderr]     |
[INFO] [stderr] 205 | struct Stack<T> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/main.rs:213:5
[INFO] [stderr]     |
[INFO] [stderr] 213 |     fn new() -> Stack<T> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push`
[INFO] [stderr]    --> src/main.rs:216:5
[INFO] [stderr]     |
[INFO] [stderr] 216 |     fn push(&mut self, val: T) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop`
[INFO] [stderr]    --> src/main.rs:220:5
[INFO] [stderr]     |
[INFO] [stderr] 220 |     fn pop(&mut self) -> Option<T> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `NotCopy`
[INFO] [stderr]    --> src/main.rs:256:1
[INFO] [stderr]     |
[INFO] [stderr] 256 | struct NotCopy {
[INFO] [stderr]     | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Owner`
[INFO] [stderr]    --> src/main.rs:260:1
[INFO] [stderr]     |
[INFO] [stderr] 260 | struct Owner {
[INFO] [stderr]     | ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `val`
[INFO] [stderr]    --> src/main.rs:274:5
[INFO] [stderr]     |
[INFO] [stderr] 274 |     val: i32,
[INFO] [stderr]     |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "8bcc363ee8fd81ce736ff5302eb4d36bc6721173f94cc40ee02ca4ef307a8b3c"`
[INFO] running `"docker" "rm" "-f" "8bcc363ee8fd81ce736ff5302eb4d36bc6721173f94cc40ee02ca4ef307a8b3c"`
[INFO] [stdout] 8bcc363ee8fd81ce736ff5302eb4d36bc6721173f94cc40ee02ca4ef307a8b3c