Dec 04 22:41:32.329 INFO checking amitdash291/rust_lifetimes against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 22:41:32.329 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 22:41:32.824 INFO [stdout] e23bc0f0d0cf6b48b5da894f591512f39f1329dc637c0beef0ef237ee5f20eb6
Dec 04 22:41:32.826 INFO running `"docker" "start" "-a" "e23bc0f0d0cf6b48b5da894f591512f39f1329dc637c0beef0ef237ee5f20eb6"`
Dec 04 22:41:34.036 INFO [stderr] usermod: no changes
Dec 04 22:41:34.091 INFO [stderr]     Checking lifetime_demo v0.1.0 (/source)
Dec 04 22:41:34.784 INFO [stderr] warning: variable `result_ref` is assigned to, but never used
Dec 04 22:41:34.784 INFO [stderr]  --> src/main.rs:4:9
Dec 04 22:41:34.784 INFO [stderr]   |
Dec 04 22:41:34.785 INFO [stderr] 4 |     let result_ref;
Dec 04 22:41:34.785 INFO [stderr]   |         ^^^^^^^^^^
Dec 04 22:41:34.785 INFO [stderr]   |
Dec 04 22:41:34.785 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 04 22:41:34.786 INFO [stderr]   = note: consider using `_result_ref` instead
Dec 04 22:41:34.786 INFO [stderr] 
Dec 04 22:41:34.786 INFO [stderr] warning: value assigned to `result_ref` is never read
Dec 04 22:41:34.786 INFO [stderr]  --> src/main.rs:6:5
Dec 04 22:41:34.786 INFO [stderr]   |
Dec 04 22:41:34.787 INFO [stderr] 6 |     result_ref = which_is_greater(&a, &b)
Dec 04 22:41:34.787 INFO [stderr]   |     ^^^^^^^^^^
Dec 04 22:41:34.787 INFO [stderr]   |
Dec 04 22:41:34.787 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 04 22:41:34.787 INFO [stderr] 
Dec 04 22:41:34.787 INFO [stderr] warning: unused variable: `a`
Dec 04 22:41:34.787 INFO [stderr]   --> src/main.rs:25:29
Dec 04 22:41:34.788 INFO [stderr]    |
Dec 04 22:41:34.788 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 04 22:41:34.788 INFO [stderr]    |                             ^ help: consider using `_a` instead
Dec 04 22:41:34.788 INFO [stderr] 
Dec 04 22:41:34.788 INFO [stderr] warning: unused variable: `b`
Dec 04 22:41:34.788 INFO [stderr]   --> src/main.rs:25:41
Dec 04 22:41:34.788 INFO [stderr]    |
Dec 04 22:41:34.788 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 04 22:41:34.789 INFO [stderr]    |                                         ^ help: consider using `_b` instead
Dec 04 22:41:34.789 INFO [stderr] 
Dec 04 22:41:34.789 INFO [stderr] warning: unused variable: `vec1`
Dec 04 22:41:34.789 INFO [stderr]   --> src/main.rs:37:13
Dec 04 22:41:34.789 INFO [stderr]    |
Dec 04 22:41:34.789 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 04 22:41:34.789 INFO [stderr]    |             ^^^^ help: consider using `_vec1` instead
Dec 04 22:41:34.789 INFO [stderr] 
Dec 04 22:41:34.791 INFO [stderr] warning: variable does not need to be mutable
Dec 04 22:41:34.791 INFO [stderr]   --> src/main.rs:37:9
Dec 04 22:41:34.791 INFO [stderr]    |
Dec 04 22:41:34.791 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 04 22:41:34.791 INFO [stderr]    |         ----^^^^
Dec 04 22:41:34.791 INFO [stderr]    |         |
Dec 04 22:41:34.792 INFO [stderr]    |         help: remove this `mut`
Dec 04 22:41:34.792 INFO [stderr]    |
Dec 04 22:41:34.792 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 22:41:34.792 INFO [stderr] 
Dec 04 22:41:34.795 INFO [stderr] warning: function is never used: `test_mut_ref`
Dec 04 22:41:34.795 INFO [stderr]   --> src/main.rs:34:1
Dec 04 22:41:34.795 INFO [stderr]    |
Dec 04 22:41:34.795 INFO [stderr] 34 | fn test_mut_ref() {
Dec 04 22:41:34.795 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 04 22:41:34.795 INFO [stderr]    |
Dec 04 22:41:34.795 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 22:41:34.795 INFO [stderr] 
Dec 04 22:41:34.796 INFO [stderr] warning: function is never used: `copy_vec`
Dec 04 22:41:34.796 INFO [stderr]   --> src/main.rs:40:1
Dec 04 22:41:34.796 INFO [stderr]    |
Dec 04 22:41:34.796 INFO [stderr] 40 | fn copy_vec(from: &Vec<i32>, to: &mut Vec<i32>) {
Dec 04 22:41:34.796 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 22:41:34.796 INFO [stderr] 
Dec 04 22:41:34.827 INFO [stderr] warning: variable `result_ref` is assigned to, but never used
Dec 04 22:41:34.827 INFO [stderr]  --> src/main.rs:4:9
Dec 04 22:41:34.827 INFO [stderr]   |
Dec 04 22:41:34.827 INFO [stderr] 4 |     let result_ref;
Dec 04 22:41:34.828 INFO [stderr]   |         ^^^^^^^^^^
Dec 04 22:41:34.828 INFO [stderr]   |
Dec 04 22:41:34.828 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 04 22:41:34.828 INFO [stderr]   = note: consider using `_result_ref` instead
Dec 04 22:41:34.828 INFO [stderr] 
Dec 04 22:41:34.828 INFO [stderr] warning: value assigned to `result_ref` is never read
Dec 04 22:41:34.828 INFO [stderr]  --> src/main.rs:6:5
Dec 04 22:41:34.828 INFO [stderr]   |
Dec 04 22:41:34.828 INFO [stderr] 6 |     result_ref = which_is_greater(&a, &b)
Dec 04 22:41:34.828 INFO [stderr]   |     ^^^^^^^^^^
Dec 04 22:41:34.829 INFO [stderr]   |
Dec 04 22:41:34.829 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 04 22:41:34.829 INFO [stderr] 
Dec 04 22:41:34.829 INFO [stderr] warning: unused variable: `a`
Dec 04 22:41:34.829 INFO [stderr]   --> src/main.rs:25:29
Dec 04 22:41:34.829 INFO [stderr]    |
Dec 04 22:41:34.829 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 04 22:41:34.829 INFO [stderr]    |                             ^ help: consider using `_a` instead
Dec 04 22:41:34.829 INFO [stderr] 
Dec 04 22:41:34.829 INFO [stderr] warning: unused variable: `b`
Dec 04 22:41:34.829 INFO [stderr]   --> src/main.rs:25:41
Dec 04 22:41:34.829 INFO [stderr]    |
Dec 04 22:41:34.830 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 04 22:41:34.830 INFO [stderr]    |                                         ^ help: consider using `_b` instead
Dec 04 22:41:34.830 INFO [stderr] 
Dec 04 22:41:34.830 INFO [stderr] warning: unused variable: `vec1`
Dec 04 22:41:34.830 INFO [stderr]   --> src/main.rs:37:13
Dec 04 22:41:34.830 INFO [stderr]    |
Dec 04 22:41:34.830 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 04 22:41:34.830 INFO [stderr]    |             ^^^^ help: consider using `_vec1` instead
Dec 04 22:41:34.830 INFO [stderr] 
Dec 04 22:41:34.839 INFO [stderr] warning: variable does not need to be mutable
Dec 04 22:41:34.839 INFO [stderr]   --> src/main.rs:37:9
Dec 04 22:41:34.839 INFO [stderr]    |
Dec 04 22:41:34.839 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 04 22:41:34.839 INFO [stderr]    |         ----^^^^
Dec 04 22:41:34.839 INFO [stderr]    |         |
Dec 04 22:41:34.839 INFO [stderr]    |         help: remove this `mut`
Dec 04 22:41:34.839 INFO [stderr]    |
Dec 04 22:41:34.839 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 22:41:34.839 INFO [stderr] 
Dec 04 22:41:34.839 INFO [stderr] warning: function is never used: `test_mut_ref`
Dec 04 22:41:34.839 INFO [stderr]   --> src/main.rs:34:1
Dec 04 22:41:34.839 INFO [stderr]    |
Dec 04 22:41:34.839 INFO [stderr] 34 | fn test_mut_ref() {
Dec 04 22:41:34.839 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 04 22:41:34.840 INFO [stderr]    |
Dec 04 22:41:34.840 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 22:41:34.840 INFO [stderr] 
Dec 04 22:41:34.840 INFO [stderr] warning: function is never used: `copy_vec`
Dec 04 22:41:34.840 INFO [stderr]   --> src/main.rs:40:1
Dec 04 22:41:34.840 INFO [stderr]    |
Dec 04 22:41:34.840 INFO [stderr] 40 | fn copy_vec(from: &Vec<i32>, to: &mut Vec<i32>) {
Dec 04 22:41:34.840 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 22:41:34.840 INFO [stderr] 
Dec 04 22:41:34.883 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.82s
Dec 04 22:41:34.885 INFO [stderr] su: No module specific data is present
Dec 04 22:41:35.566 INFO running `"docker" "inspect" "e23bc0f0d0cf6b48b5da894f591512f39f1329dc637c0beef0ef237ee5f20eb6"`
Dec 04 22:41:35.685 INFO running `"docker" "rm" "-f" "e23bc0f0d0cf6b48b5da894f591512f39f1329dc637c0beef0ef237ee5f20eb6"`
Dec 04 22:41:35.801 INFO [stdout] e23bc0f0d0cf6b48b5da894f591512f39f1329dc637c0beef0ef237ee5f20eb6