Dec 11 09:40:35.313 INFO checking shanemikel/rust-hello against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 09:40:35.313 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-1/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/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 09:40:35.739 INFO [stdout] 6f14fbe1ad1e98325df2db6244eeef51f41422887806dcc218e60ef2ede9597d
Dec 11 09:40:35.741 INFO running `"docker" "start" "-a" "6f14fbe1ad1e98325df2db6244eeef51f41422887806dcc218e60ef2ede9597d"`
Dec 11 09:40:37.156 INFO [stderr] usermod: no changes
Dec 11 09:40:37.225 INFO [stderr]     Checking rust-hello v0.1.0 (/source)
Dec 11 09:40:37.520 INFO [stderr] warning: unused import: `std::cell::RefCell`
Dec 11 09:40:37.520 INFO [stderr]  --> src/main.rs:8:9
Dec 11 09:40:37.520 INFO [stderr]   |
Dec 11 09:40:37.520 INFO [stderr] 8 |     use std::cell::RefCell;
Dec 11 09:40:37.520 INFO [stderr]   |         ^^^^^^^^^^^^^^^^^^
Dec 11 09:40:37.520 INFO [stderr]   |
Dec 11 09:40:37.520 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 09:40:37.521 INFO [stderr] 
Dec 11 09:40:37.521 INFO [stderr] warning: unused import: `Mutex`
Dec 11 09:40:37.521 INFO [stderr]  --> src/main.rs:9:26
Dec 11 09:40:37.521 INFO [stderr]   |
Dec 11 09:40:37.521 INFO [stderr] 9 |     use std::sync::{Arc, Mutex, RwLock};
Dec 11 09:40:37.521 INFO [stderr]   |                          ^^^^^
Dec 11 09:40:37.521 INFO [stderr] 
Dec 11 09:40:37.583 INFO [stderr] warning: unused import: `std::cell::RefCell`
Dec 11 09:40:37.583 INFO [stderr]  --> src/main.rs:8:9
Dec 11 09:40:37.583 INFO [stderr]   |
Dec 11 09:40:37.583 INFO [stderr] 8 |     use std::cell::RefCell;
Dec 11 09:40:37.584 INFO [stderr]   |         ^^^^^^^^^^^^^^^^^^
Dec 11 09:40:37.584 INFO [stderr]   |
Dec 11 09:40:37.584 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 09:40:37.584 INFO [stderr] 
Dec 11 09:40:37.584 INFO [stderr] warning: unused import: `Mutex`
Dec 11 09:40:37.584 INFO [stderr]  --> src/main.rs:9:26
Dec 11 09:40:37.584 INFO [stderr]   |
Dec 11 09:40:37.584 INFO [stderr] 9 |     use std::sync::{Arc, Mutex, RwLock};
Dec 11 09:40:37.584 INFO [stderr]   |                          ^^^^^
Dec 11 09:40:37.584 INFO [stderr] 
Dec 11 09:40:37.638 INFO [stderr] warning: unused variable: `data`
Dec 11 09:40:37.638 INFO [stderr]   --> src/main.rs:25:17
Dec 11 09:40:37.638 INFO [stderr]    |
Dec 11 09:40:37.638 INFO [stderr] 25 |             let data = data.read().unwrap();
Dec 11 09:40:37.638 INFO [stderr]    |                 ^^^^ help: consider using `_data` instead
Dec 11 09:40:37.639 INFO [stderr]    |
Dec 11 09:40:37.639 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 11 09:40:37.639 INFO [stderr] 
Dec 11 09:40:37.659 INFO [stderr] warning: enum is never used: `List`
Dec 11 09:40:37.660 INFO [stderr]  --> src/list.rs:3:1
Dec 11 09:40:37.660 INFO [stderr]   |
Dec 11 09:40:37.660 INFO [stderr] 3 | pub enum List<T> {
Dec 11 09:40:37.660 INFO [stderr]   | ^^^^^^^^^^^^^^^^
Dec 11 09:40:37.660 INFO [stderr]   |
Dec 11 09:40:37.660 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 11 09:40:37.660 INFO [stderr] 
Dec 11 09:40:37.660 INFO [stderr] warning: method is never used: `new`
Dec 11 09:40:37.660 INFO [stderr]  --> src/list.rs:9:5
Dec 11 09:40:37.660 INFO [stderr]   |
Dec 11 09:40:37.660 INFO [stderr] 9 |     pub fn new() -> List<T> { List::Nil }
Dec 11 09:40:37.660 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:40:37.660 INFO [stderr] 
Dec 11 09:40:37.660 INFO [stderr] warning: method is never used: `cons`
Dec 11 09:40:37.660 INFO [stderr]   --> src/list.rs:11:5
Dec 11 09:40:37.660 INFO [stderr]    |
Dec 11 09:40:37.660 INFO [stderr] 11 |     pub fn cons(self, x: T) -> List<T> { List::Cons(x, Box::new(self)) }
Dec 11 09:40:37.660 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:40:37.660 INFO [stderr] 
Dec 11 09:40:37.660 INFO [stderr] warning: method is never used: `head`
Dec 11 09:40:37.660 INFO [stderr]   --> src/list.rs:13:5
Dec 11 09:40:37.660 INFO [stderr]    |
Dec 11 09:40:37.660 INFO [stderr] 13 |     pub fn head(self) -> Option<T> {
Dec 11 09:40:37.661 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:40:37.662 INFO [stderr] 
Dec 11 09:40:37.663 INFO [stderr] warning: method is never used: `tail`
Dec 11 09:40:37.663 INFO [stderr]   --> src/list.rs:20:5
Dec 11 09:40:37.663 INFO [stderr]    |
Dec 11 09:40:37.663 INFO [stderr] 20 |     pub fn tail(&self) -> Option<&List<T>> {
Dec 11 09:40:37.663 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:40:37.663 INFO [stderr] 
Dec 11 09:40:37.663 INFO [stderr] warning: method is never used: `head_ref`
Dec 11 09:40:37.663 INFO [stderr]   --> src/list.rs:29:5
Dec 11 09:40:37.663 INFO [stderr]    |
Dec 11 09:40:37.663 INFO [stderr] 29 |     pub fn head_ref(&self) -> Option<T> {
Dec 11 09:40:37.663 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:40:37.663 INFO [stderr] 
Dec 11 09:40:37.663 INFO [stderr] warning: constant item is never used: `N`
Dec 11 09:40:37.663 INFO [stderr]   --> src/main.rs:13:5
Dec 11 09:40:37.663 INFO [stderr]    |
Dec 11 09:40:37.663 INFO [stderr] 13 |     const N: usize = 10;
Dec 11 09:40:37.663 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Dec 11 09:40:37.663 INFO [stderr] 
Dec 11 09:40:37.663 INFO [stderr] warning: function is never used: `test_list`
Dec 11 09:40:37.663 INFO [stderr]   --> src/main.rs:39:1
Dec 11 09:40:37.663 INFO [stderr]    |
Dec 11 09:40:37.663 INFO [stderr] 39 | fn test_list() {
Dec 11 09:40:37.663 INFO [stderr]    | ^^^^^^^^^^^^^^
Dec 11 09:40:37.663 INFO [stderr] 
Dec 11 09:40:37.743 INFO [stderr] warning: unused variable: `data`
Dec 11 09:40:37.743 INFO [stderr]   --> src/main.rs:25:17
Dec 11 09:40:37.743 INFO [stderr]    |
Dec 11 09:40:37.744 INFO [stderr] 25 |             let data = data.read().unwrap();
Dec 11 09:40:37.748 INFO [stderr]    |                 ^^^^ help: consider using `_data` instead
Dec 11 09:40:37.748 INFO [stderr]    |
Dec 11 09:40:37.748 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 11 09:40:37.748 INFO [stderr] 
Dec 11 09:40:37.759 INFO [stderr] warning: enum is never used: `List`
Dec 11 09:40:37.759 INFO [stderr]  --> src/list.rs:3:1
Dec 11 09:40:37.759 INFO [stderr]   |
Dec 11 09:40:37.760 INFO [stderr] 3 | pub enum List<T> {
Dec 11 09:40:37.760 INFO [stderr]   | ^^^^^^^^^^^^^^^^
Dec 11 09:40:37.760 INFO [stderr]   |
Dec 11 09:40:37.760 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 11 09:40:37.760 INFO [stderr] 
Dec 11 09:40:37.760 INFO [stderr] warning: method is never used: `new`
Dec 11 09:40:37.760 INFO [stderr]  --> src/list.rs:9:5
Dec 11 09:40:37.760 INFO [stderr]   |
Dec 11 09:40:37.760 INFO [stderr] 9 |     pub fn new() -> List<T> { List::Nil }
Dec 11 09:40:37.760 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:40:37.760 INFO [stderr] 
Dec 11 09:40:37.760 INFO [stderr] warning: method is never used: `cons`
Dec 11 09:40:37.760 INFO [stderr]   --> src/list.rs:11:5
Dec 11 09:40:37.760 INFO [stderr]    |
Dec 11 09:40:37.760 INFO [stderr] 11 |     pub fn cons(self, x: T) -> List<T> { List::Cons(x, Box::new(self)) }
Dec 11 09:40:37.760 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:40:37.760 INFO [stderr] 
Dec 11 09:40:37.760 INFO [stderr] warning: method is never used: `head`
Dec 11 09:40:37.760 INFO [stderr]   --> src/list.rs:13:5
Dec 11 09:40:37.760 INFO [stderr]    |
Dec 11 09:40:37.760 INFO [stderr] 13 |     pub fn head(self) -> Option<T> {
Dec 11 09:40:37.760 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:40:37.760 INFO [stderr] 
Dec 11 09:40:37.760 INFO [stderr] warning: method is never used: `tail`
Dec 11 09:40:37.760 INFO [stderr]   --> src/list.rs:20:5
Dec 11 09:40:37.760 INFO [stderr]    |
Dec 11 09:40:37.760 INFO [stderr] 20 |     pub fn tail(&self) -> Option<&List<T>> {
Dec 11 09:40:37.760 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:40:37.760 INFO [stderr] 
Dec 11 09:40:37.760 INFO [stderr] warning: method is never used: `head_ref`
Dec 11 09:40:37.760 INFO [stderr]   --> src/list.rs:29:5
Dec 11 09:40:37.760 INFO [stderr]    |
Dec 11 09:40:37.760 INFO [stderr] 29 |     pub fn head_ref(&self) -> Option<T> {
Dec 11 09:40:37.760 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:40:37.760 INFO [stderr] 
Dec 11 09:40:37.760 INFO [stderr] warning: constant item is never used: `N`
Dec 11 09:40:37.760 INFO [stderr]   --> src/main.rs:13:5
Dec 11 09:40:37.760 INFO [stderr]    |
Dec 11 09:40:37.760 INFO [stderr] 13 |     const N: usize = 10;
Dec 11 09:40:37.760 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Dec 11 09:40:37.761 INFO [stderr] 
Dec 11 09:40:37.761 INFO [stderr] warning: function is never used: `test_list`
Dec 11 09:40:37.761 INFO [stderr]   --> src/main.rs:39:1
Dec 11 09:40:37.761 INFO [stderr]    |
Dec 11 09:40:37.761 INFO [stderr] 39 | fn test_list() {
Dec 11 09:40:37.761 INFO [stderr]    | ^^^^^^^^^^^^^^
Dec 11 09:40:37.761 INFO [stderr] 
Dec 11 09:40:37.796 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
Dec 11 09:40:37.796 INFO [stderr] su: No module specific data is present
Dec 11 09:40:38.999 INFO running `"docker" "inspect" "6f14fbe1ad1e98325df2db6244eeef51f41422887806dcc218e60ef2ede9597d"`
Dec 11 09:40:39.240 INFO running `"docker" "rm" "-f" "6f14fbe1ad1e98325df2db6244eeef51f41422887806dcc218e60ef2ede9597d"`
Dec 11 09:40:39.556 INFO [stdout] 6f14fbe1ad1e98325df2db6244eeef51f41422887806dcc218e60ef2ede9597d