Oct 12 13:55:25.551 INFO checking shanemikel/rust-hello against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 12 13:55:25.552 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-7/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-7/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-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 12 13:55:26.118 INFO blam! 0dc21104dad7a10214fbe03bf1383f7b5d9cff2c9612ae4d774e59964f8fd374
Oct 12 13:55:26.120 INFO running `"docker" "start" "-a" "0dc21104dad7a10214fbe03bf1383f7b5d9cff2c9612ae4d774e59964f8fd374"`
Oct 12 13:55:28.328 INFO kablam! usermod: no changes
Oct 12 13:55:28.360 INFO kablam!     Checking rust-hello v0.1.0 (/source)
Oct 12 13:55:28.764 INFO kablam! warning: unused import: `std::cell::RefCell`
Oct 12 13:55:28.764 INFO kablam!  --> src/main.rs:8:9
Oct 12 13:55:28.764 INFO kablam!   |
Oct 12 13:55:28.764 INFO kablam! 8 |     use std::cell::RefCell;
Oct 12 13:55:28.764 INFO kablam!   |         ^^^^^^^^^^^^^^^^^^
Oct 12 13:55:28.764 INFO kablam!   |
Oct 12 13:55:28.764 INFO kablam!   = note: #[warn(unused_imports)] on by default
Oct 12 13:55:28.764 INFO kablam! 
Oct 12 13:55:28.764 INFO kablam! warning: unused import: `Mutex`
Oct 12 13:55:28.764 INFO kablam!  --> src/main.rs:9:26
Oct 12 13:55:28.764 INFO kablam!   |
Oct 12 13:55:28.765 INFO kablam! 9 |     use std::sync::{Arc, Mutex, RwLock};
Oct 12 13:55:28.765 INFO kablam!   |                          ^^^^^
Oct 12 13:55:28.765 INFO kablam! 
Oct 12 13:55:28.804 INFO kablam! warning: unused import: `std::cell::RefCell`
Oct 12 13:55:28.805 INFO kablam!  --> src/main.rs:8:9
Oct 12 13:55:28.805 INFO kablam!   |
Oct 12 13:55:28.806 INFO kablam! 8 |     use std::cell::RefCell;
Oct 12 13:55:28.806 INFO kablam!   |         ^^^^^^^^^^^^^^^^^^
Oct 12 13:55:28.806 INFO kablam!   |
Oct 12 13:55:28.807 INFO kablam!   = note: #[warn(unused_imports)] on by default
Oct 12 13:55:28.807 INFO kablam! 
Oct 12 13:55:28.807 INFO kablam! warning: unused import: `Mutex`
Oct 12 13:55:28.808 INFO kablam!  --> src/main.rs:9:26
Oct 12 13:55:28.808 INFO kablam!   |
Oct 12 13:55:28.808 INFO kablam! 9 |     use std::sync::{Arc, Mutex, RwLock};
Oct 12 13:55:28.809 INFO kablam!   |                          ^^^^^
Oct 12 13:55:28.809 INFO kablam! 
Oct 12 13:55:28.949 INFO kablam! warning: unused variable: `data`
Oct 12 13:55:28.949 INFO kablam!   --> src/main.rs:25:17
Oct 12 13:55:28.950 INFO kablam!    |
Oct 12 13:55:28.950 INFO kablam! 25 |             let data = data.read().unwrap();
Oct 12 13:55:28.950 INFO kablam!    |                 ^^^^ help: consider using `_data` instead
Oct 12 13:55:28.951 INFO kablam!    |
Oct 12 13:55:28.951 INFO kablam!    = note: #[warn(unused_variables)] on by default
Oct 12 13:55:28.951 INFO kablam! 
Oct 12 13:55:28.984 INFO kablam! warning: enum is never used: `List`
Oct 12 13:55:28.984 INFO kablam!  --> src/list.rs:3:1
Oct 12 13:55:28.985 INFO kablam!   |
Oct 12 13:55:28.985 INFO kablam! 3 | pub enum List<T> {
Oct 12 13:55:28.986 INFO kablam!   | ^^^^^^^^^^^^^^^^
Oct 12 13:55:28.986 INFO kablam!   |
Oct 12 13:55:28.986 INFO kablam!   = note: #[warn(dead_code)] on by default
Oct 12 13:55:28.986 INFO kablam! 
Oct 12 13:55:28.987 INFO kablam! warning: method is never used: `new`
Oct 12 13:55:28.987 INFO kablam!  --> src/list.rs:9:5
Oct 12 13:55:28.987 INFO kablam!   |
Oct 12 13:55:28.988 INFO kablam! 9 |     pub fn new() -> List<T> { List::Nil }
Oct 12 13:55:28.988 INFO kablam!   |     ^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 13:55:28.988 INFO kablam! 
Oct 12 13:55:28.989 INFO kablam! warning: method is never used: `cons`
Oct 12 13:55:28.989 INFO kablam!   --> src/list.rs:11:5
Oct 12 13:55:28.989 INFO kablam!    |
Oct 12 13:55:28.990 INFO kablam! 11 |     pub fn cons(self, x: T) -> List<T> { List::Cons(x, Box::new(self)) }
Oct 12 13:55:28.990 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 13:55:28.990 INFO kablam! 
Oct 12 13:55:28.991 INFO kablam! warning: method is never used: `head`
Oct 12 13:55:28.991 INFO kablam!   --> src/list.rs:13:5
Oct 12 13:55:28.991 INFO kablam!    |
Oct 12 13:55:28.992 INFO kablam! 13 |     pub fn head(self) -> Option<T> {
Oct 12 13:55:28.992 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 13:55:28.992 INFO kablam! 
Oct 12 13:55:28.993 INFO kablam! warning: method is never used: `tail`
Oct 12 13:55:28.993 INFO kablam!   --> src/list.rs:20:5
Oct 12 13:55:28.993 INFO kablam!    |
Oct 12 13:55:28.994 INFO kablam! 20 |     pub fn tail(&self) -> Option<&List<T>> {
Oct 12 13:55:28.994 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 13:55:28.994 INFO kablam! 
Oct 12 13:55:28.995 INFO kablam! warning: method is never used: `head_ref`
Oct 12 13:55:28.995 INFO kablam!   --> src/list.rs:29:5
Oct 12 13:55:28.995 INFO kablam!    |
Oct 12 13:55:28.996 INFO kablam! 29 |     pub fn head_ref(&self) -> Option<T> {
Oct 12 13:55:28.996 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 13:55:28.996 INFO kablam! 
Oct 12 13:55:28.996 INFO kablam! warning: constant item is never used: `N`
Oct 12 13:55:28.996 INFO kablam!   --> src/main.rs:13:5
Oct 12 13:55:28.996 INFO kablam!    |
Oct 12 13:55:28.996 INFO kablam! 13 |     const N: usize = 10;
Oct 12 13:55:28.996 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^
Oct 12 13:55:28.996 INFO kablam! 
Oct 12 13:55:28.996 INFO kablam! warning: function is never used: `test_list`
Oct 12 13:55:28.996 INFO kablam!   --> src/main.rs:39:1
Oct 12 13:55:28.996 INFO kablam!    |
Oct 12 13:55:28.996 INFO kablam! 39 | fn test_list() {
Oct 12 13:55:28.996 INFO kablam!    | ^^^^^^^^^^^^^^
Oct 12 13:55:28.996 INFO kablam! 
Oct 12 13:55:28.998 INFO kablam! warning: unused variable: `data`
Oct 12 13:55:28.998 INFO kablam!   --> src/main.rs:25:17
Oct 12 13:55:28.999 INFO kablam!    |
Oct 12 13:55:28.999 INFO kablam! 25 |             let data = data.read().unwrap();
Oct 12 13:55:28.999 INFO kablam!    |                 ^^^^ help: consider using `_data` instead
Oct 12 13:55:29.000 INFO kablam!    |
Oct 12 13:55:29.000 INFO kablam!    = note: #[warn(unused_variables)] on by default
Oct 12 13:55:29.000 INFO kablam! 
Oct 12 13:55:29.023 INFO kablam! warning: enum is never used: `List`
Oct 12 13:55:29.024 INFO kablam!  --> src/list.rs:3:1
Oct 12 13:55:29.024 INFO kablam!   |
Oct 12 13:55:29.025 INFO kablam! 3 | pub enum List<T> {
Oct 12 13:55:29.025 INFO kablam!   | ^^^^^^^^^^^^^^^^
Oct 12 13:55:29.025 INFO kablam!   |
Oct 12 13:55:29.026 INFO kablam!   = note: #[warn(dead_code)] on by default
Oct 12 13:55:29.026 INFO kablam! 
Oct 12 13:55:29.032 INFO kablam! warning: method is never used: `new`
Oct 12 13:55:29.033 INFO kablam!  --> src/list.rs:9:5
Oct 12 13:55:29.033 INFO kablam!   |
Oct 12 13:55:29.033 INFO kablam! 9 |     pub fn new() -> List<T> { List::Nil }
Oct 12 13:55:29.033 INFO kablam!   |     ^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 13:55:29.034 INFO kablam! 
Oct 12 13:55:29.034 INFO kablam! warning: method is never used: `cons`
Oct 12 13:55:29.034 INFO kablam!   --> src/list.rs:11:5
Oct 12 13:55:29.035 INFO kablam!    |
Oct 12 13:55:29.035 INFO kablam! 11 |     pub fn cons(self, x: T) -> List<T> { List::Cons(x, Box::new(self)) }
Oct 12 13:55:29.035 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 13:55:29.036 INFO kablam! 
Oct 12 13:55:29.036 INFO kablam! warning: method is never used: `head`
Oct 12 13:55:29.036 INFO kablam!   --> src/list.rs:13:5
Oct 12 13:55:29.037 INFO kablam!    |
Oct 12 13:55:29.037 INFO kablam! 13 |     pub fn head(self) -> Option<T> {
Oct 12 13:55:29.037 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 13:55:29.037 INFO kablam! 
Oct 12 13:55:29.038 INFO kablam! warning: method is never used: `tail`
Oct 12 13:55:29.038 INFO kablam!   --> src/list.rs:20:5
Oct 12 13:55:29.039 INFO kablam!    |
Oct 12 13:55:29.039 INFO kablam! 20 |     pub fn tail(&self) -> Option<&List<T>> {
Oct 12 13:55:29.039 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 13:55:29.040 INFO kablam! 
Oct 12 13:55:29.040 INFO kablam! warning: method is never used: `head_ref`
Oct 12 13:55:29.040 INFO kablam!   --> src/list.rs:29:5
Oct 12 13:55:29.041 INFO kablam!    |
Oct 12 13:55:29.041 INFO kablam! 29 |     pub fn head_ref(&self) -> Option<T> {
Oct 12 13:55:29.041 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 13:55:29.041 INFO kablam! 
Oct 12 13:55:29.042 INFO kablam! warning: constant item is never used: `N`
Oct 12 13:55:29.042 INFO kablam!   --> src/main.rs:13:5
Oct 12 13:55:29.042 INFO kablam!    |
Oct 12 13:55:29.043 INFO kablam! 13 |     const N: usize = 10;
Oct 12 13:55:29.043 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^
Oct 12 13:55:29.043 INFO kablam! 
Oct 12 13:55:29.044 INFO kablam! warning: function is never used: `test_list`
Oct 12 13:55:29.044 INFO kablam!   --> src/main.rs:39:1
Oct 12 13:55:29.044 INFO kablam!    |
Oct 12 13:55:29.044 INFO kablam! 39 | fn test_list() {
Oct 12 13:55:29.045 INFO kablam!    | ^^^^^^^^^^^^^^
Oct 12 13:55:29.045 INFO kablam! 
Oct 12 13:55:29.098 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
Oct 12 13:55:29.100 INFO kablam! su: No module specific data is present
Oct 12 13:55:30.500 INFO running `"docker" "rm" "-f" "0dc21104dad7a10214fbe03bf1383f7b5d9cff2c9612ae4d774e59964f8fd374"`
Oct 12 13:55:30.893 INFO blam! 0dc21104dad7a10214fbe03bf1383f7b5d9cff2c9612ae4d774e59964f8fd374