Nov 29 18:22:50.966 INFO checking shanemikel/rust-hello against try#32252761328f59ccfadb1bafb8148c685bc830b3 for pr-56323
Nov 29 18:22:50.966 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-6/try#32252761328f59ccfadb1bafb8148c685bc830b3:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56323/try#32252761328f59ccfadb1bafb8148c685bc830b3:/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 +32252761328f59ccfadb1bafb8148c685bc830b3-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 29 18:22:51.441 INFO [stdout] ab7c820bcddd29113f0b815b607f4216dd1f0f616ecc1d3c545a0020c1c0d649
Nov 29 18:22:51.444 INFO running `"docker" "start" "-a" "ab7c820bcddd29113f0b815b607f4216dd1f0f616ecc1d3c545a0020c1c0d649"`
Nov 29 18:22:53.619 INFO [stderr] usermod: no changes
Nov 29 18:22:53.684 INFO [stderr]     Checking rust-hello v0.1.0 (/source)
Nov 29 18:22:54.176 INFO [stderr] warning: unused import: `std::cell::RefCell`
Nov 29 18:22:54.176 INFO [stderr]  --> src/main.rs:8:9
Nov 29 18:22:54.176 INFO [stderr]   |
Nov 29 18:22:54.176 INFO [stderr] 8 |     use std::cell::RefCell;
Nov 29 18:22:54.176 INFO [stderr]   |         ^^^^^^^^^^^^^^^^^^
Nov 29 18:22:54.176 INFO [stderr]   |
Nov 29 18:22:54.176 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 29 18:22:54.176 INFO [stderr] 
Nov 29 18:22:54.176 INFO [stderr] warning: unused import: `Mutex`
Nov 29 18:22:54.176 INFO [stderr]  --> src/main.rs:9:26
Nov 29 18:22:54.176 INFO [stderr]   |
Nov 29 18:22:54.176 INFO [stderr] 9 |     use std::sync::{Arc, Mutex, RwLock};
Nov 29 18:22:54.176 INFO [stderr]   |                          ^^^^^
Nov 29 18:22:54.176 INFO [stderr] 
Nov 29 18:22:54.212 INFO [stderr] warning: unused import: `std::cell::RefCell`
Nov 29 18:22:54.212 INFO [stderr]  --> src/main.rs:8:9
Nov 29 18:22:54.212 INFO [stderr]   |
Nov 29 18:22:54.212 INFO [stderr] 8 |     use std::cell::RefCell;
Nov 29 18:22:54.212 INFO [stderr]   |         ^^^^^^^^^^^^^^^^^^
Nov 29 18:22:54.212 INFO [stderr]   |
Nov 29 18:22:54.212 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 29 18:22:54.212 INFO [stderr] 
Nov 29 18:22:54.212 INFO [stderr] warning: unused import: `Mutex`
Nov 29 18:22:54.212 INFO [stderr]  --> src/main.rs:9:26
Nov 29 18:22:54.212 INFO [stderr]   |
Nov 29 18:22:54.212 INFO [stderr] 9 |     use std::sync::{Arc, Mutex, RwLock};
Nov 29 18:22:54.212 INFO [stderr]   |                          ^^^^^
Nov 29 18:22:54.212 INFO [stderr] 
Nov 29 18:22:54.384 INFO [stderr] warning: unused variable: `data`
Nov 29 18:22:54.384 INFO [stderr]   --> src/main.rs:25:17
Nov 29 18:22:54.384 INFO [stderr]    |
Nov 29 18:22:54.384 INFO [stderr] 25 |             let data = data.read().unwrap();
Nov 29 18:22:54.384 INFO [stderr]    |                 ^^^^ help: consider using `_data` instead
Nov 29 18:22:54.384 INFO [stderr]    |
Nov 29 18:22:54.384 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Nov 29 18:22:54.384 INFO [stderr] 
Nov 29 18:22:54.408 INFO [stderr] warning: enum is never used: `List`
Nov 29 18:22:54.408 INFO [stderr]  --> src/list.rs:3:1
Nov 29 18:22:54.408 INFO [stderr]   |
Nov 29 18:22:54.408 INFO [stderr] 3 | pub enum List<T> {
Nov 29 18:22:54.408 INFO [stderr]   | ^^^^^^^^^^^^^^^^
Nov 29 18:22:54.408 INFO [stderr]   |
Nov 29 18:22:54.408 INFO [stderr]   = note: #[warn(dead_code)] on by default
Nov 29 18:22:54.408 INFO [stderr] 
Nov 29 18:22:54.408 INFO [stderr] warning: method is never used: `new`
Nov 29 18:22:54.408 INFO [stderr]  --> src/list.rs:9:5
Nov 29 18:22:54.408 INFO [stderr]   |
Nov 29 18:22:54.408 INFO [stderr] 9 |     pub fn new() -> List<T> { List::Nil }
Nov 29 18:22:54.408 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 18:22:54.408 INFO [stderr] 
Nov 29 18:22:54.408 INFO [stderr] warning: method is never used: `cons`
Nov 29 18:22:54.408 INFO [stderr]   --> src/list.rs:11:5
Nov 29 18:22:54.408 INFO [stderr]    |
Nov 29 18:22:54.408 INFO [stderr] 11 |     pub fn cons(self, x: T) -> List<T> { List::Cons(x, Box::new(self)) }
Nov 29 18:22:54.408 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 18:22:54.408 INFO [stderr] 
Nov 29 18:22:54.408 INFO [stderr] warning: method is never used: `head`
Nov 29 18:22:54.408 INFO [stderr]   --> src/list.rs:13:5
Nov 29 18:22:54.408 INFO [stderr]    |
Nov 29 18:22:54.408 INFO [stderr] 13 |     pub fn head(self) -> Option<T> {
Nov 29 18:22:54.408 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 18:22:54.408 INFO [stderr] 
Nov 29 18:22:54.408 INFO [stderr] warning: method is never used: `tail`
Nov 29 18:22:54.408 INFO [stderr]   --> src/list.rs:20:5
Nov 29 18:22:54.408 INFO [stderr]    |
Nov 29 18:22:54.408 INFO [stderr] 20 |     pub fn tail(&self) -> Option<&List<T>> {
Nov 29 18:22:54.408 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 18:22:54.408 INFO [stderr] 
Nov 29 18:22:54.408 INFO [stderr] warning: method is never used: `head_ref`
Nov 29 18:22:54.408 INFO [stderr]   --> src/list.rs:29:5
Nov 29 18:22:54.408 INFO [stderr]    |
Nov 29 18:22:54.408 INFO [stderr] 29 |     pub fn head_ref(&self) -> Option<T> {
Nov 29 18:22:54.408 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 18:22:54.408 INFO [stderr] 
Nov 29 18:22:54.408 INFO [stderr] warning: constant item is never used: `N`
Nov 29 18:22:54.408 INFO [stderr]   --> src/main.rs:13:5
Nov 29 18:22:54.408 INFO [stderr]    |
Nov 29 18:22:54.408 INFO [stderr] 13 |     const N: usize = 10;
Nov 29 18:22:54.409 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Nov 29 18:22:54.409 INFO [stderr] 
Nov 29 18:22:54.409 INFO [stderr] warning: function is never used: `test_list`
Nov 29 18:22:54.409 INFO [stderr]   --> src/main.rs:39:1
Nov 29 18:22:54.409 INFO [stderr]    |
Nov 29 18:22:54.409 INFO [stderr] 39 | fn test_list() {
Nov 29 18:22:54.409 INFO [stderr]    | ^^^^^^^^^^^^^^
Nov 29 18:22:54.409 INFO [stderr] 
Nov 29 18:22:54.432 INFO [stderr] warning: unused variable: `data`
Nov 29 18:22:54.432 INFO [stderr]   --> src/main.rs:25:17
Nov 29 18:22:54.432 INFO [stderr]    |
Nov 29 18:22:54.432 INFO [stderr] 25 |             let data = data.read().unwrap();
Nov 29 18:22:54.432 INFO [stderr]    |                 ^^^^ help: consider using `_data` instead
Nov 29 18:22:54.433 INFO [stderr]    |
Nov 29 18:22:54.433 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Nov 29 18:22:54.433 INFO [stderr] 
Nov 29 18:22:54.456 INFO [stderr] warning: enum is never used: `List`
Nov 29 18:22:54.456 INFO [stderr]  --> src/list.rs:3:1
Nov 29 18:22:54.457 INFO [stderr]   |
Nov 29 18:22:54.457 INFO [stderr] 3 | pub enum List<T> {
Nov 29 18:22:54.457 INFO [stderr]   | ^^^^^^^^^^^^^^^^
Nov 29 18:22:54.457 INFO [stderr]   |
Nov 29 18:22:54.457 INFO [stderr]   = note: #[warn(dead_code)] on by default
Nov 29 18:22:54.457 INFO [stderr] 
Nov 29 18:22:54.457 INFO [stderr] warning: method is never used: `new`
Nov 29 18:22:54.457 INFO [stderr]  --> src/list.rs:9:5
Nov 29 18:22:54.457 INFO [stderr]   |
Nov 29 18:22:54.457 INFO [stderr] 9 |     pub fn new() -> List<T> { List::Nil }
Nov 29 18:22:54.457 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 18:22:54.457 INFO [stderr] 
Nov 29 18:22:54.457 INFO [stderr] warning: method is never used: `cons`
Nov 29 18:22:54.457 INFO [stderr]   --> src/list.rs:11:5
Nov 29 18:22:54.457 INFO [stderr]    |
Nov 29 18:22:54.457 INFO [stderr] 11 |     pub fn cons(self, x: T) -> List<T> { List::Cons(x, Box::new(self)) }
Nov 29 18:22:54.457 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 18:22:54.457 INFO [stderr] 
Nov 29 18:22:54.457 INFO [stderr] warning: method is never used: `head`
Nov 29 18:22:54.457 INFO [stderr]   --> src/list.rs:13:5
Nov 29 18:22:54.457 INFO [stderr]    |
Nov 29 18:22:54.457 INFO [stderr] 13 |     pub fn head(self) -> Option<T> {
Nov 29 18:22:54.457 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 18:22:54.457 INFO [stderr] 
Nov 29 18:22:54.458 INFO [stderr] warning: method is never used: `tail`
Nov 29 18:22:54.458 INFO [stderr]   --> src/list.rs:20:5
Nov 29 18:22:54.458 INFO [stderr]    |
Nov 29 18:22:54.458 INFO [stderr] 20 |     pub fn tail(&self) -> Option<&List<T>> {
Nov 29 18:22:54.458 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 18:22:54.458 INFO [stderr] 
Nov 29 18:22:54.458 INFO [stderr] warning: method is never used: `head_ref`
Nov 29 18:22:54.458 INFO [stderr]   --> src/list.rs:29:5
Nov 29 18:22:54.458 INFO [stderr]    |
Nov 29 18:22:54.458 INFO [stderr] 29 |     pub fn head_ref(&self) -> Option<T> {
Nov 29 18:22:54.458 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 18:22:54.458 INFO [stderr] 
Nov 29 18:22:54.458 INFO [stderr] warning: constant item is never used: `N`
Nov 29 18:22:54.458 INFO [stderr]   --> src/main.rs:13:5
Nov 29 18:22:54.458 INFO [stderr]    |
Nov 29 18:22:54.458 INFO [stderr] 13 |     const N: usize = 10;
Nov 29 18:22:54.458 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Nov 29 18:22:54.458 INFO [stderr] 
Nov 29 18:22:54.458 INFO [stderr] warning: function is never used: `test_list`
Nov 29 18:22:54.458 INFO [stderr]   --> src/main.rs:39:1
Nov 29 18:22:54.458 INFO [stderr]    |
Nov 29 18:22:54.458 INFO [stderr] 39 | fn test_list() {
Nov 29 18:22:54.458 INFO [stderr]    | ^^^^^^^^^^^^^^
Nov 29 18:22:54.458 INFO [stderr] 
Nov 29 18:22:54.500 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
Nov 29 18:22:54.500 INFO [stderr] su: No module specific data is present
Nov 29 18:22:55.712 INFO running `"docker" "inspect" "ab7c820bcddd29113f0b815b607f4216dd1f0f616ecc1d3c545a0020c1c0d649"`
Nov 29 18:22:55.968 INFO running `"docker" "rm" "-f" "ab7c820bcddd29113f0b815b607f4216dd1f0f616ecc1d3c545a0020c1c0d649"`
Nov 29 18:22:56.320 INFO [stdout] ab7c820bcddd29113f0b815b607f4216dd1f0f616ecc1d3c545a0020c1c0d649