Nov 27 20:36:00.891 INFO checking shanemikel/rust-hello against try#db42d4dad33013eba11ef37342ad9f614e5652b8 for pr-56074
Nov 27 20:36:00.893 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-1/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56074/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/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 +db42d4dad33013eba11ef37342ad9f614e5652b8-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"`
Nov 27 20:36:01.390 INFO [stdout] 99304ecbee687ca4db45766864823ff520e8bee5af4fd7d305da9219d84d717c
Nov 27 20:36:01.393 INFO running `"docker" "start" "-a" "99304ecbee687ca4db45766864823ff520e8bee5af4fd7d305da9219d84d717c"`
Nov 27 20:36:03.915 INFO [stderr] usermod: no changes
Nov 27 20:36:03.972 INFO [stderr]     Checking rust-hello v0.1.0 (/source)
Nov 27 20:36:04.326 INFO [stderr] warning: unused import: `std::cell::RefCell`
Nov 27 20:36:04.326 INFO [stderr]  --> src/main.rs:8:9
Nov 27 20:36:04.326 INFO [stderr]   |
Nov 27 20:36:04.326 INFO [stderr] 8 |     use std::cell::RefCell;
Nov 27 20:36:04.326 INFO [stderr]   |         ^^^^^^^^^^^^^^^^^^
Nov 27 20:36:04.326 INFO [stderr]   |
Nov 27 20:36:04.340 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 27 20:36:04.344 INFO [stderr] 
Nov 27 20:36:04.345 INFO [stderr] warning: unused import: `Mutex`
Nov 27 20:36:04.345 INFO [stderr]  --> src/main.rs:9:26
Nov 27 20:36:04.345 INFO [stderr]   |
Nov 27 20:36:04.345 INFO [stderr] 9 |     use std::sync::{Arc, Mutex, RwLock};
Nov 27 20:36:04.345 INFO [stderr]   |                          ^^^^^
Nov 27 20:36:04.345 INFO [stderr] 
Nov 27 20:36:04.375 INFO [stderr] warning: unused import: `std::cell::RefCell`
Nov 27 20:36:04.375 INFO [stderr]  --> src/main.rs:8:9
Nov 27 20:36:04.375 INFO [stderr]   |
Nov 27 20:36:04.375 INFO [stderr] 8 |     use std::cell::RefCell;
Nov 27 20:36:04.375 INFO [stderr]   |         ^^^^^^^^^^^^^^^^^^
Nov 27 20:36:04.375 INFO [stderr]   |
Nov 27 20:36:04.375 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 27 20:36:04.375 INFO [stderr] 
Nov 27 20:36:04.375 INFO [stderr] warning: unused import: `Mutex`
Nov 27 20:36:04.375 INFO [stderr]  --> src/main.rs:9:26
Nov 27 20:36:04.375 INFO [stderr]   |
Nov 27 20:36:04.375 INFO [stderr] 9 |     use std::sync::{Arc, Mutex, RwLock};
Nov 27 20:36:04.375 INFO [stderr]   |                          ^^^^^
Nov 27 20:36:04.375 INFO [stderr] 
Nov 27 20:36:04.571 INFO [stderr] warning: unused variable: `data`
Nov 27 20:36:04.571 INFO [stderr]   --> src/main.rs:25:17
Nov 27 20:36:04.571 INFO [stderr]    |
Nov 27 20:36:04.571 INFO [stderr] 25 |             let data = data.read().unwrap();
Nov 27 20:36:04.571 INFO [stderr]    |                 ^^^^ help: consider using `_data` instead
Nov 27 20:36:04.571 INFO [stderr]    |
Nov 27 20:36:04.571 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Nov 27 20:36:04.571 INFO [stderr] 
Nov 27 20:36:04.584 INFO [stderr] warning: unused variable: `data`
Nov 27 20:36:04.584 INFO [stderr]   --> src/main.rs:25:17
Nov 27 20:36:04.584 INFO [stderr]    |
Nov 27 20:36:04.584 INFO [stderr] 25 |             let data = data.read().unwrap();
Nov 27 20:36:04.584 INFO [stderr]    |                 ^^^^ help: consider using `_data` instead
Nov 27 20:36:04.584 INFO [stderr]    |
Nov 27 20:36:04.584 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Nov 27 20:36:04.584 INFO [stderr] 
Nov 27 20:36:04.604 INFO [stderr] warning: enum is never used: `List`
Nov 27 20:36:04.604 INFO [stderr]  --> src/list.rs:3:1
Nov 27 20:36:04.604 INFO [stderr]   |
Nov 27 20:36:04.604 INFO [stderr] 3 | pub enum List<T> {
Nov 27 20:36:04.604 INFO [stderr]   | ^^^^^^^^^^^^^^^^
Nov 27 20:36:04.604 INFO [stderr]   |
Nov 27 20:36:04.604 INFO [stderr]   = note: #[warn(dead_code)] on by default
Nov 27 20:36:04.604 INFO [stderr] 
Nov 27 20:36:04.604 INFO [stderr] warning: method is never used: `new`
Nov 27 20:36:04.604 INFO [stderr]  --> src/list.rs:9:5
Nov 27 20:36:04.604 INFO [stderr]   |
Nov 27 20:36:04.604 INFO [stderr] 9 |     pub fn new() -> List<T> { List::Nil }
Nov 27 20:36:04.604 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:36:04.604 INFO [stderr] 
Nov 27 20:36:04.605 INFO [stderr] warning: method is never used: `cons`
Nov 27 20:36:04.605 INFO [stderr]   --> src/list.rs:11:5
Nov 27 20:36:04.605 INFO [stderr]    |
Nov 27 20:36:04.605 INFO [stderr] 11 |     pub fn cons(self, x: T) -> List<T> { List::Cons(x, Box::new(self)) }
Nov 27 20:36:04.605 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:36:04.605 INFO [stderr] 
Nov 27 20:36:04.605 INFO [stderr] warning: method is never used: `head`
Nov 27 20:36:04.605 INFO [stderr]   --> src/list.rs:13:5
Nov 27 20:36:04.605 INFO [stderr]    |
Nov 27 20:36:04.605 INFO [stderr] 13 |     pub fn head(self) -> Option<T> {
Nov 27 20:36:04.605 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:36:04.605 INFO [stderr] 
Nov 27 20:36:04.605 INFO [stderr] warning: method is never used: `tail`
Nov 27 20:36:04.605 INFO [stderr]   --> src/list.rs:20:5
Nov 27 20:36:04.605 INFO [stderr]    |
Nov 27 20:36:04.605 INFO [stderr] 20 |     pub fn tail(&self) -> Option<&List<T>> {
Nov 27 20:36:04.605 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:36:04.605 INFO [stderr] 
Nov 27 20:36:04.605 INFO [stderr] warning: method is never used: `head_ref`
Nov 27 20:36:04.605 INFO [stderr]   --> src/list.rs:29:5
Nov 27 20:36:04.605 INFO [stderr]    |
Nov 27 20:36:04.605 INFO [stderr] 29 |     pub fn head_ref(&self) -> Option<T> {
Nov 27 20:36:04.605 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:36:04.605 INFO [stderr] 
Nov 27 20:36:04.605 INFO [stderr] warning: constant item is never used: `N`
Nov 27 20:36:04.605 INFO [stderr]   --> src/main.rs:13:5
Nov 27 20:36:04.605 INFO [stderr]    |
Nov 27 20:36:04.605 INFO [stderr] 13 |     const N: usize = 10;
Nov 27 20:36:04.605 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Nov 27 20:36:04.605 INFO [stderr] 
Nov 27 20:36:04.605 INFO [stderr] warning: function is never used: `test_list`
Nov 27 20:36:04.605 INFO [stderr]   --> src/main.rs:39:1
Nov 27 20:36:04.605 INFO [stderr]    |
Nov 27 20:36:04.605 INFO [stderr] 39 | fn test_list() {
Nov 27 20:36:04.605 INFO [stderr]    | ^^^^^^^^^^^^^^
Nov 27 20:36:04.605 INFO [stderr] 
Nov 27 20:36:04.611 INFO [stderr] warning: enum is never used: `List`
Nov 27 20:36:04.611 INFO [stderr]  --> src/list.rs:3:1
Nov 27 20:36:04.611 INFO [stderr]   |
Nov 27 20:36:04.611 INFO [stderr] 3 | pub enum List<T> {
Nov 27 20:36:04.611 INFO [stderr]   | ^^^^^^^^^^^^^^^^
Nov 27 20:36:04.611 INFO [stderr]   |
Nov 27 20:36:04.616 INFO [stderr]   = note: #[warn(dead_code)] on by default
Nov 27 20:36:04.616 INFO [stderr] 
Nov 27 20:36:04.617 INFO [stderr] warning: method is never used: `new`
Nov 27 20:36:04.617 INFO [stderr]  --> src/list.rs:9:5
Nov 27 20:36:04.617 INFO [stderr]   |
Nov 27 20:36:04.617 INFO [stderr] 9 |     pub fn new() -> List<T> { List::Nil }
Nov 27 20:36:04.618 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:36:04.618 INFO [stderr] 
Nov 27 20:36:04.618 INFO [stderr] warning: method is never used: `cons`
Nov 27 20:36:04.619 INFO [stderr]   --> src/list.rs:11:5
Nov 27 20:36:04.619 INFO [stderr]    |
Nov 27 20:36:04.619 INFO [stderr] 11 |     pub fn cons(self, x: T) -> List<T> { List::Cons(x, Box::new(self)) }
Nov 27 20:36:04.619 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:36:04.619 INFO [stderr] 
Nov 27 20:36:04.620 INFO [stderr] warning: method is never used: `head`
Nov 27 20:36:04.620 INFO [stderr]   --> src/list.rs:13:5
Nov 27 20:36:04.620 INFO [stderr]    |
Nov 27 20:36:04.621 INFO [stderr] 13 |     pub fn head(self) -> Option<T> {
Nov 27 20:36:04.621 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:36:04.621 INFO [stderr] 
Nov 27 20:36:04.622 INFO [stderr] warning: method is never used: `tail`
Nov 27 20:36:04.622 INFO [stderr]   --> src/list.rs:20:5
Nov 27 20:36:04.622 INFO [stderr]    |
Nov 27 20:36:04.622 INFO [stderr] 20 |     pub fn tail(&self) -> Option<&List<T>> {
Nov 27 20:36:04.622 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:36:04.623 INFO [stderr] 
Nov 27 20:36:04.623 INFO [stderr] warning: method is never used: `head_ref`
Nov 27 20:36:04.623 INFO [stderr]   --> src/list.rs:29:5
Nov 27 20:36:04.623 INFO [stderr]    |
Nov 27 20:36:04.623 INFO [stderr] 29 |     pub fn head_ref(&self) -> Option<T> {
Nov 27 20:36:04.623 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:36:04.623 INFO [stderr] 
Nov 27 20:36:04.623 INFO [stderr] warning: constant item is never used: `N`
Nov 27 20:36:04.623 INFO [stderr]   --> src/main.rs:13:5
Nov 27 20:36:04.623 INFO [stderr]    |
Nov 27 20:36:04.623 INFO [stderr] 13 |     const N: usize = 10;
Nov 27 20:36:04.623 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Nov 27 20:36:04.623 INFO [stderr] 
Nov 27 20:36:04.624 INFO [stderr] warning: function is never used: `test_list`
Nov 27 20:36:04.624 INFO [stderr]   --> src/main.rs:39:1
Nov 27 20:36:04.624 INFO [stderr]    |
Nov 27 20:36:04.624 INFO [stderr] 39 | fn test_list() {
Nov 27 20:36:04.624 INFO [stderr]    | ^^^^^^^^^^^^^^
Nov 27 20:36:04.624 INFO [stderr] 
Nov 27 20:36:04.684 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.74s
Nov 27 20:36:04.684 INFO [stderr] su: No module specific data is present
Nov 27 20:36:05.954 INFO running `"docker" "inspect" "99304ecbee687ca4db45766864823ff520e8bee5af4fd7d305da9219d84d717c"`
Nov 27 20:36:06.306 INFO running `"docker" "rm" "-f" "99304ecbee687ca4db45766864823ff520e8bee5af4fd7d305da9219d84d717c"`
Nov 27 20:36:06.607 INFO [stdout] 99304ecbee687ca4db45766864823ff520e8bee5af4fd7d305da9219d84d717c