Dec 04 10:20:02.152 INFO checking shanemikel/rust-hello against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 10:20:02.152 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-4/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/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 +1df97983eb2057dc6a8f7eb364e263b51ae23230-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 04 10:20:02.636 INFO [stdout] 8bae7f38a90b6f9c943153cf24212db2f66316692bf2efebb54670912741d3a9
Dec 04 10:20:02.639 INFO running `"docker" "start" "-a" "8bae7f38a90b6f9c943153cf24212db2f66316692bf2efebb54670912741d3a9"`
Dec 04 10:20:05.511 INFO [stderr] usermod: no changes
Dec 04 10:20:05.587 INFO [stderr]     Checking rust-hello v0.1.0 (/source)
Dec 04 10:20:05.951 INFO [stderr] warning: unused import: `std::cell::RefCell`
Dec 04 10:20:05.951 INFO [stderr]  --> src/main.rs:8:9
Dec 04 10:20:05.951 INFO [stderr]   |
Dec 04 10:20:05.951 INFO [stderr] 8 |     use std::cell::RefCell;
Dec 04 10:20:05.951 INFO [stderr]   |         ^^^^^^^^^^^^^^^^^^
Dec 04 10:20:05.951 INFO [stderr]   |
Dec 04 10:20:05.951 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 10:20:05.951 INFO [stderr] 
Dec 04 10:20:05.951 INFO [stderr] warning: unused import: `Mutex`
Dec 04 10:20:05.951 INFO [stderr]  --> src/main.rs:9:26
Dec 04 10:20:05.951 INFO [stderr]   |
Dec 04 10:20:05.951 INFO [stderr] 9 |     use std::sync::{Arc, Mutex, RwLock};
Dec 04 10:20:05.951 INFO [stderr]   |                          ^^^^^
Dec 04 10:20:05.951 INFO [stderr] 
Dec 04 10:20:05.960 INFO [stderr] warning: unused import: `std::cell::RefCell`
Dec 04 10:20:05.960 INFO [stderr]  --> src/main.rs:8:9
Dec 04 10:20:05.960 INFO [stderr]   |
Dec 04 10:20:05.960 INFO [stderr] 8 |     use std::cell::RefCell;
Dec 04 10:20:05.960 INFO [stderr]   |         ^^^^^^^^^^^^^^^^^^
Dec 04 10:20:05.960 INFO [stderr]   |
Dec 04 10:20:05.967 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 10:20:05.967 INFO [stderr] 
Dec 04 10:20:05.967 INFO [stderr] warning: unused import: `Mutex`
Dec 04 10:20:05.967 INFO [stderr]  --> src/main.rs:9:26
Dec 04 10:20:05.967 INFO [stderr]   |
Dec 04 10:20:05.967 INFO [stderr] 9 |     use std::sync::{Arc, Mutex, RwLock};
Dec 04 10:20:05.967 INFO [stderr]   |                          ^^^^^
Dec 04 10:20:05.967 INFO [stderr] 
Dec 04 10:20:06.115 INFO [stderr] warning: unused variable: `data`
Dec 04 10:20:06.116 INFO [stderr]   --> src/main.rs:25:17
Dec 04 10:20:06.116 INFO [stderr]    |
Dec 04 10:20:06.116 INFO [stderr] 25 |             let data = data.read().unwrap();
Dec 04 10:20:06.116 INFO [stderr]    |                 ^^^^ help: consider using `_data` instead
Dec 04 10:20:06.116 INFO [stderr]    |
Dec 04 10:20:06.116 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 10:20:06.116 INFO [stderr] 
Dec 04 10:20:06.127 INFO [stderr] warning: unused variable: `data`
Dec 04 10:20:06.127 INFO [stderr]   --> src/main.rs:25:17
Dec 04 10:20:06.127 INFO [stderr]    |
Dec 04 10:20:06.127 INFO [stderr] 25 |             let data = data.read().unwrap();
Dec 04 10:20:06.127 INFO [stderr]    |                 ^^^^ help: consider using `_data` instead
Dec 04 10:20:06.128 INFO [stderr]    |
Dec 04 10:20:06.128 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 10:20:06.128 INFO [stderr] 
Dec 04 10:20:06.147 INFO [stderr] warning: enum is never used: `List`
Dec 04 10:20:06.147 INFO [stderr]  --> src/list.rs:3:1
Dec 04 10:20:06.147 INFO [stderr]   |
Dec 04 10:20:06.147 INFO [stderr] 3 | pub enum List<T> {
Dec 04 10:20:06.147 INFO [stderr]   | ^^^^^^^^^^^^^^^^
Dec 04 10:20:06.147 INFO [stderr]   |
Dec 04 10:20:06.147 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 04 10:20:06.147 INFO [stderr] 
Dec 04 10:20:06.147 INFO [stderr] warning: method is never used: `new`
Dec 04 10:20:06.147 INFO [stderr]  --> src/list.rs:9:5
Dec 04 10:20:06.148 INFO [stderr]   |
Dec 04 10:20:06.148 INFO [stderr] 9 |     pub fn new() -> List<T> { List::Nil }
Dec 04 10:20:06.148 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:20:06.148 INFO [stderr] 
Dec 04 10:20:06.148 INFO [stderr] warning: method is never used: `cons`
Dec 04 10:20:06.148 INFO [stderr]   --> src/list.rs:11:5
Dec 04 10:20:06.148 INFO [stderr]    |
Dec 04 10:20:06.148 INFO [stderr] 11 |     pub fn cons(self, x: T) -> List<T> { List::Cons(x, Box::new(self)) }
Dec 04 10:20:06.148 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:20:06.148 INFO [stderr] 
Dec 04 10:20:06.148 INFO [stderr] warning: method is never used: `head`
Dec 04 10:20:06.148 INFO [stderr]   --> src/list.rs:13:5
Dec 04 10:20:06.148 INFO [stderr]    |
Dec 04 10:20:06.148 INFO [stderr] 13 |     pub fn head(self) -> Option<T> {
Dec 04 10:20:06.148 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:20:06.148 INFO [stderr] 
Dec 04 10:20:06.148 INFO [stderr] warning: method is never used: `tail`
Dec 04 10:20:06.148 INFO [stderr]   --> src/list.rs:20:5
Dec 04 10:20:06.148 INFO [stderr]    |
Dec 04 10:20:06.148 INFO [stderr] 20 |     pub fn tail(&self) -> Option<&List<T>> {
Dec 04 10:20:06.148 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:20:06.151 INFO [stderr] 
Dec 04 10:20:06.151 INFO [stderr] warning: method is never used: `head_ref`
Dec 04 10:20:06.151 INFO [stderr]   --> src/list.rs:29:5
Dec 04 10:20:06.151 INFO [stderr]    |
Dec 04 10:20:06.151 INFO [stderr] 29 |     pub fn head_ref(&self) -> Option<T> {
Dec 04 10:20:06.151 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:20:06.151 INFO [stderr] 
Dec 04 10:20:06.151 INFO [stderr] warning: constant item is never used: `N`
Dec 04 10:20:06.151 INFO [stderr]   --> src/main.rs:13:5
Dec 04 10:20:06.151 INFO [stderr]    |
Dec 04 10:20:06.151 INFO [stderr] 13 |     const N: usize = 10;
Dec 04 10:20:06.151 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Dec 04 10:20:06.151 INFO [stderr] 
Dec 04 10:20:06.151 INFO [stderr] warning: function is never used: `test_list`
Dec 04 10:20:06.151 INFO [stderr]   --> src/main.rs:39:1
Dec 04 10:20:06.151 INFO [stderr]    |
Dec 04 10:20:06.151 INFO [stderr] 39 | fn test_list() {
Dec 04 10:20:06.151 INFO [stderr]    | ^^^^^^^^^^^^^^
Dec 04 10:20:06.151 INFO [stderr] 
Dec 04 10:20:06.160 INFO [stderr] warning: enum is never used: `List`
Dec 04 10:20:06.160 INFO [stderr]  --> src/list.rs:3:1
Dec 04 10:20:06.160 INFO [stderr]   |
Dec 04 10:20:06.160 INFO [stderr] 3 | pub enum List<T> {
Dec 04 10:20:06.160 INFO [stderr]   | ^^^^^^^^^^^^^^^^
Dec 04 10:20:06.160 INFO [stderr]   |
Dec 04 10:20:06.161 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 04 10:20:06.161 INFO [stderr] 
Dec 04 10:20:06.161 INFO [stderr] warning: method is never used: `new`
Dec 04 10:20:06.161 INFO [stderr]  --> src/list.rs:9:5
Dec 04 10:20:06.161 INFO [stderr]   |
Dec 04 10:20:06.161 INFO [stderr] 9 |     pub fn new() -> List<T> { List::Nil }
Dec 04 10:20:06.161 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:20:06.161 INFO [stderr] 
Dec 04 10:20:06.161 INFO [stderr] warning: method is never used: `cons`
Dec 04 10:20:06.161 INFO [stderr]   --> src/list.rs:11:5
Dec 04 10:20:06.161 INFO [stderr]    |
Dec 04 10:20:06.161 INFO [stderr] 11 |     pub fn cons(self, x: T) -> List<T> { List::Cons(x, Box::new(self)) }
Dec 04 10:20:06.162 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:20:06.162 INFO [stderr] 
Dec 04 10:20:06.162 INFO [stderr] warning: method is never used: `head`
Dec 04 10:20:06.162 INFO [stderr]   --> src/list.rs:13:5
Dec 04 10:20:06.162 INFO [stderr]    |
Dec 04 10:20:06.162 INFO [stderr] 13 |     pub fn head(self) -> Option<T> {
Dec 04 10:20:06.163 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:20:06.163 INFO [stderr] 
Dec 04 10:20:06.163 INFO [stderr] warning: method is never used: `tail`
Dec 04 10:20:06.163 INFO [stderr]   --> src/list.rs:20:5
Dec 04 10:20:06.163 INFO [stderr]    |
Dec 04 10:20:06.163 INFO [stderr] 20 |     pub fn tail(&self) -> Option<&List<T>> {
Dec 04 10:20:06.164 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:20:06.164 INFO [stderr] 
Dec 04 10:20:06.164 INFO [stderr] warning: method is never used: `head_ref`
Dec 04 10:20:06.164 INFO [stderr]   --> src/list.rs:29:5
Dec 04 10:20:06.164 INFO [stderr]    |
Dec 04 10:20:06.164 INFO [stderr] 29 |     pub fn head_ref(&self) -> Option<T> {
Dec 04 10:20:06.165 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 10:20:06.165 INFO [stderr] 
Dec 04 10:20:06.165 INFO [stderr] warning: constant item is never used: `N`
Dec 04 10:20:06.165 INFO [stderr]   --> src/main.rs:13:5
Dec 04 10:20:06.165 INFO [stderr]    |
Dec 04 10:20:06.165 INFO [stderr] 13 |     const N: usize = 10;
Dec 04 10:20:06.166 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Dec 04 10:20:06.166 INFO [stderr] 
Dec 04 10:20:06.166 INFO [stderr] warning: function is never used: `test_list`
Dec 04 10:20:06.166 INFO [stderr]   --> src/main.rs:39:1
Dec 04 10:20:06.166 INFO [stderr]    |
Dec 04 10:20:06.166 INFO [stderr] 39 | fn test_list() {
Dec 04 10:20:06.167 INFO [stderr]    | ^^^^^^^^^^^^^^
Dec 04 10:20:06.167 INFO [stderr] 
Dec 04 10:20:06.223 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.68s
Dec 04 10:20:06.231 INFO [stderr] su: No module specific data is present
Dec 04 10:20:07.615 INFO running `"docker" "inspect" "8bae7f38a90b6f9c943153cf24212db2f66316692bf2efebb54670912741d3a9"`
Dec 04 10:20:07.855 INFO running `"docker" "rm" "-f" "8bae7f38a90b6f9c943153cf24212db2f66316692bf2efebb54670912741d3a9"`
Dec 04 10:20:08.171 INFO [stdout] 8bae7f38a90b6f9c943153cf24212db2f66316692bf2efebb54670912741d3a9