Oct 31 21:18:44.779 INFO checking shanemikel/rust-hello against try#d7816399d50d407bbce1efe9dbadf8faaaf568fc for pr-55538
Oct 31 21:18:44.781 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55538/worker-6/try#d7816399d50d407bbce1efe9dbadf8faaaf568fc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-55538/try#d7816399d50d407bbce1efe9dbadf8faaaf568fc:/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 +d7816399d50d407bbce1efe9dbadf8faaaf568fc-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"`
Oct 31 21:18:45.237 INFO blam! 00dc2a0ef8360feab95d27a01bf70b3a0b9ca49d02562240d13a618b7574574d
Oct 31 21:18:45.239 INFO running `"docker" "start" "-a" "00dc2a0ef8360feab95d27a01bf70b3a0b9ca49d02562240d13a618b7574574d"`
Oct 31 21:18:47.448 INFO kablam! usermod: no changes
Oct 31 21:18:47.512 INFO kablam!     Checking rust-hello v0.1.0 (/source)
Oct 31 21:18:47.961 INFO kablam! warning: unused import: `std::cell::RefCell`
Oct 31 21:18:47.961 INFO kablam!  --> src/main.rs:8:9
Oct 31 21:18:47.961 INFO kablam!   |
Oct 31 21:18:47.961 INFO kablam! 8 |     use std::cell::RefCell;
Oct 31 21:18:47.961 INFO kablam!   |         ^^^^^^^^^^^^^^^^^^
Oct 31 21:18:47.961 INFO kablam!   |
Oct 31 21:18:47.961 INFO kablam!   = note: #[warn(unused_imports)] on by default
Oct 31 21:18:47.963 INFO kablam! 
Oct 31 21:18:47.963 INFO kablam! warning: unused import: `Mutex`
Oct 31 21:18:47.963 INFO kablam!  --> src/main.rs:9:26
Oct 31 21:18:47.963 INFO kablam!   |
Oct 31 21:18:47.963 INFO kablam! 9 |     use std::sync::{Arc, Mutex, RwLock};
Oct 31 21:18:47.963 INFO kablam!   |                          ^^^^^
Oct 31 21:18:47.963 INFO kablam! 
Oct 31 21:18:48.017 INFO kablam! warning: unused import: `std::cell::RefCell`
Oct 31 21:18:48.017 INFO kablam!  --> src/main.rs:8:9
Oct 31 21:18:48.017 INFO kablam!   |
Oct 31 21:18:48.017 INFO kablam! 8 |     use std::cell::RefCell;
Oct 31 21:18:48.018 INFO kablam!   |         ^^^^^^^^^^^^^^^^^^
Oct 31 21:18:48.018 INFO kablam!   |
Oct 31 21:18:48.018 INFO kablam!   = note: #[warn(unused_imports)] on by default
Oct 31 21:18:48.018 INFO kablam! 
Oct 31 21:18:48.018 INFO kablam! warning: unused import: `Mutex`
Oct 31 21:18:48.018 INFO kablam!  --> src/main.rs:9:26
Oct 31 21:18:48.018 INFO kablam!   |
Oct 31 21:18:48.018 INFO kablam! 9 |     use std::sync::{Arc, Mutex, RwLock};
Oct 31 21:18:48.018 INFO kablam!   |                          ^^^^^
Oct 31 21:18:48.018 INFO kablam! 
Oct 31 21:18:48.209 INFO kablam! warning: unused variable: `data`
Oct 31 21:18:48.209 INFO kablam!   --> src/main.rs:25:17
Oct 31 21:18:48.209 INFO kablam!    |
Oct 31 21:18:48.209 INFO kablam! 25 |             let data = data.read().unwrap();
Oct 31 21:18:48.209 INFO kablam!    |                 ^^^^ help: consider using `_data` instead
Oct 31 21:18:48.209 INFO kablam!    |
Oct 31 21:18:48.228 INFO kablam!    = note: #[warn(unused_variables)] on by default
Oct 31 21:18:48.228 INFO kablam! 
Oct 31 21:18:48.234 INFO kablam! warning: enum is never used: `List`
Oct 31 21:18:48.234 INFO kablam!  --> src/list.rs:3:1
Oct 31 21:18:48.234 INFO kablam!   |
Oct 31 21:18:48.234 INFO kablam! 3 | pub enum List<T> {
Oct 31 21:18:48.234 INFO kablam!   | ^^^^^^^^^^^^^^^^
Oct 31 21:18:48.234 INFO kablam!   |
Oct 31 21:18:48.240 INFO kablam!   = note: #[warn(dead_code)] on by default
Oct 31 21:18:48.241 INFO kablam! 
Oct 31 21:18:48.241 INFO kablam! warning: method is never used: `new`
Oct 31 21:18:48.241 INFO kablam!  --> src/list.rs:9:5
Oct 31 21:18:48.241 INFO kablam!   |
Oct 31 21:18:48.241 INFO kablam! 9 |     pub fn new() -> List<T> { List::Nil }
Oct 31 21:18:48.241 INFO kablam!   |     ^^^^^^^^^^^^^^^^^^^^^^^
Oct 31 21:18:48.241 INFO kablam! 
Oct 31 21:18:48.241 INFO kablam! warning: method is never used: `cons`
Oct 31 21:18:48.242 INFO kablam!   --> src/list.rs:11:5
Oct 31 21:18:48.243 INFO kablam!    |
Oct 31 21:18:48.243 INFO kablam! 11 |     pub fn cons(self, x: T) -> List<T> { List::Cons(x, Box::new(self)) }
Oct 31 21:18:48.243 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 31 21:18:48.243 INFO kablam! 
Oct 31 21:18:48.243 INFO kablam! warning: method is never used: `head`
Oct 31 21:18:48.243 INFO kablam!   --> src/list.rs:13:5
Oct 31 21:18:48.243 INFO kablam!    |
Oct 31 21:18:48.243 INFO kablam! 13 |     pub fn head(self) -> Option<T> {
Oct 31 21:18:48.243 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 31 21:18:48.243 INFO kablam! 
Oct 31 21:18:48.243 INFO kablam! warning: method is never used: `tail`
Oct 31 21:18:48.243 INFO kablam!   --> src/list.rs:20:5
Oct 31 21:18:48.243 INFO kablam!    |
Oct 31 21:18:48.243 INFO kablam! 20 |     pub fn tail(&self) -> Option<&List<T>> {
Oct 31 21:18:48.243 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 31 21:18:48.245 INFO kablam! 
Oct 31 21:18:48.245 INFO kablam! warning: method is never used: `head_ref`
Oct 31 21:18:48.245 INFO kablam!   --> src/list.rs:29:5
Oct 31 21:18:48.245 INFO kablam!    |
Oct 31 21:18:48.245 INFO kablam! 29 |     pub fn head_ref(&self) -> Option<T> {
Oct 31 21:18:48.245 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 31 21:18:48.245 INFO kablam! 
Oct 31 21:18:48.245 INFO kablam! warning: constant item is never used: `N`
Oct 31 21:18:48.245 INFO kablam!   --> src/main.rs:13:5
Oct 31 21:18:48.245 INFO kablam!    |
Oct 31 21:18:48.245 INFO kablam! 13 |     const N: usize = 10;
Oct 31 21:18:48.245 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^
Oct 31 21:18:48.245 INFO kablam! 
Oct 31 21:18:48.245 INFO kablam! warning: function is never used: `test_list`
Oct 31 21:18:48.245 INFO kablam!   --> src/main.rs:39:1
Oct 31 21:18:48.246 INFO kablam!    |
Oct 31 21:18:48.246 INFO kablam! 39 | fn test_list() {
Oct 31 21:18:48.246 INFO kablam!    | ^^^^^^^^^^^^^^
Oct 31 21:18:48.246 INFO kablam! 
Oct 31 21:18:48.252 INFO kablam! warning: unused variable: `data`
Oct 31 21:18:48.252 INFO kablam!   --> src/main.rs:25:17
Oct 31 21:18:48.252 INFO kablam!    |
Oct 31 21:18:48.252 INFO kablam! 25 |             let data = data.read().unwrap();
Oct 31 21:18:48.252 INFO kablam!    |                 ^^^^ help: consider using `_data` instead
Oct 31 21:18:48.252 INFO kablam!    |
Oct 31 21:18:48.252 INFO kablam!    = note: #[warn(unused_variables)] on by default
Oct 31 21:18:48.252 INFO kablam! 
Oct 31 21:18:48.304 INFO kablam! warning: enum is never used: `List`
Oct 31 21:18:48.304 INFO kablam!  --> src/list.rs:3:1
Oct 31 21:18:48.305 INFO kablam!   |
Oct 31 21:18:48.305 INFO kablam! 3 | pub enum List<T> {
Oct 31 21:18:48.305 INFO kablam!   | ^^^^^^^^^^^^^^^^
Oct 31 21:18:48.306 INFO kablam!   |
Oct 31 21:18:48.306 INFO kablam!   = note: #[warn(dead_code)] on by default
Oct 31 21:18:48.306 INFO kablam! 
Oct 31 21:18:48.307 INFO kablam! warning: method is never used: `new`
Oct 31 21:18:48.307 INFO kablam!  --> src/list.rs:9:5
Oct 31 21:18:48.307 INFO kablam!   |
Oct 31 21:18:48.308 INFO kablam! 9 |     pub fn new() -> List<T> { List::Nil }
Oct 31 21:18:48.308 INFO kablam!   |     ^^^^^^^^^^^^^^^^^^^^^^^
Oct 31 21:18:48.308 INFO kablam! 
Oct 31 21:18:48.309 INFO kablam! warning: method is never used: `cons`
Oct 31 21:18:48.309 INFO kablam!   --> src/list.rs:11:5
Oct 31 21:18:48.309 INFO kablam!    |
Oct 31 21:18:48.310 INFO kablam! 11 |     pub fn cons(self, x: T) -> List<T> { List::Cons(x, Box::new(self)) }
Oct 31 21:18:48.310 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 31 21:18:48.310 INFO kablam! 
Oct 31 21:18:48.311 INFO kablam! warning: method is never used: `head`
Oct 31 21:18:48.311 INFO kablam!   --> src/list.rs:13:5
Oct 31 21:18:48.312 INFO kablam!    |
Oct 31 21:18:48.312 INFO kablam! 13 |     pub fn head(self) -> Option<T> {
Oct 31 21:18:48.312 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 31 21:18:48.312 INFO kablam! 
Oct 31 21:18:48.312 INFO kablam! warning: method is never used: `tail`
Oct 31 21:18:48.312 INFO kablam!   --> src/list.rs:20:5
Oct 31 21:18:48.312 INFO kablam!    |
Oct 31 21:18:48.312 INFO kablam! 20 |     pub fn tail(&self) -> Option<&List<T>> {
Oct 31 21:18:48.312 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 31 21:18:48.312 INFO kablam! 
Oct 31 21:18:48.312 INFO kablam! warning: method is never used: `head_ref`
Oct 31 21:18:48.312 INFO kablam!   --> src/list.rs:29:5
Oct 31 21:18:48.312 INFO kablam!    |
Oct 31 21:18:48.312 INFO kablam! 29 |     pub fn head_ref(&self) -> Option<T> {
Oct 31 21:18:48.312 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 31 21:18:48.312 INFO kablam! 
Oct 31 21:18:48.312 INFO kablam! warning: constant item is never used: `N`
Oct 31 21:18:48.312 INFO kablam!   --> src/main.rs:13:5
Oct 31 21:18:48.312 INFO kablam!    |
Oct 31 21:18:48.312 INFO kablam! 13 |     const N: usize = 10;
Oct 31 21:18:48.312 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^
Oct 31 21:18:48.312 INFO kablam! 
Oct 31 21:18:48.312 INFO kablam! warning: function is never used: `test_list`
Oct 31 21:18:48.312 INFO kablam!   --> src/main.rs:39:1
Oct 31 21:18:48.312 INFO kablam!    |
Oct 31 21:18:48.312 INFO kablam! 39 | fn test_list() {
Oct 31 21:18:48.312 INFO kablam!    | ^^^^^^^^^^^^^^
Oct 31 21:18:48.312 INFO kablam! 
Oct 31 21:18:48.361 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.88s
Oct 31 21:18:48.363 INFO kablam! su: No module specific data is present
Oct 31 21:18:49.904 INFO running `"docker" "rm" "-f" "00dc2a0ef8360feab95d27a01bf70b3a0b9ca49d02562240d13a618b7574574d"`
Oct 31 21:18:50.237 INFO blam! 00dc2a0ef8360feab95d27a01bf70b3a0b9ca49d02562240d13a618b7574574d