Dec 11 22:41:32.817 INFO checking amitdash291/rust_lifetimes against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 22:41:32.817 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-7/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-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 11 22:41:34.608 INFO [stdout] e38093b52e927fb27186b06fc31704958c03e3a91171e1e5cc38ef615ae84012
Dec 11 22:41:34.610 INFO running `"docker" "start" "-a" "e38093b52e927fb27186b06fc31704958c03e3a91171e1e5cc38ef615ae84012"`
Dec 11 22:41:35.125 INFO [stderr] usermod: no changes
Dec 11 22:41:35.157 INFO [stderr]     Checking lifetime_demo v0.1.0 (/source)
Dec 11 22:41:35.518 INFO [stderr] warning: variable `result_ref` is assigned to, but never used
Dec 11 22:41:35.518 INFO [stderr]  --> src/main.rs:4:9
Dec 11 22:41:35.518 INFO [stderr]   |
Dec 11 22:41:35.518 INFO [stderr] 4 |     let result_ref;
Dec 11 22:41:35.518 INFO [stderr]   |         ^^^^^^^^^^
Dec 11 22:41:35.518 INFO [stderr]   |
Dec 11 22:41:35.518 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 11 22:41:35.518 INFO [stderr]   = note: consider using `_result_ref` instead
Dec 11 22:41:35.518 INFO [stderr] 
Dec 11 22:41:35.518 INFO [stderr] warning: value assigned to `result_ref` is never read
Dec 11 22:41:35.518 INFO [stderr]  --> src/main.rs:6:5
Dec 11 22:41:35.518 INFO [stderr]   |
Dec 11 22:41:35.518 INFO [stderr] 6 |     result_ref = which_is_greater(&a, &b)
Dec 11 22:41:35.518 INFO [stderr]   |     ^^^^^^^^^^
Dec 11 22:41:35.518 INFO [stderr]   |
Dec 11 22:41:35.518 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 11 22:41:35.518 INFO [stderr] 
Dec 11 22:41:35.518 INFO [stderr] warning: unused variable: `a`
Dec 11 22:41:35.518 INFO [stderr]   --> src/main.rs:25:29
Dec 11 22:41:35.519 INFO [stderr]    |
Dec 11 22:41:35.519 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 11 22:41:35.519 INFO [stderr]    |                             ^ help: consider using `_a` instead
Dec 11 22:41:35.519 INFO [stderr] 
Dec 11 22:41:35.519 INFO [stderr] warning: unused variable: `b`
Dec 11 22:41:35.519 INFO [stderr]   --> src/main.rs:25:41
Dec 11 22:41:35.519 INFO [stderr]    |
Dec 11 22:41:35.519 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 11 22:41:35.519 INFO [stderr]    |                                         ^ help: consider using `_b` instead
Dec 11 22:41:35.519 INFO [stderr] 
Dec 11 22:41:35.519 INFO [stderr] warning: unused variable: `vec1`
Dec 11 22:41:35.519 INFO [stderr]   --> src/main.rs:37:13
Dec 11 22:41:35.519 INFO [stderr]    |
Dec 11 22:41:35.519 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 11 22:41:35.519 INFO [stderr]    |             ^^^^ help: consider using `_vec1` instead
Dec 11 22:41:35.519 INFO [stderr] 
Dec 11 22:41:35.519 INFO [stderr] warning: variable does not need to be mutable
Dec 11 22:41:35.519 INFO [stderr]   --> src/main.rs:37:9
Dec 11 22:41:35.519 INFO [stderr]    |
Dec 11 22:41:35.519 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 11 22:41:35.519 INFO [stderr]    |         ----^^^^
Dec 11 22:41:35.519 INFO [stderr]    |         |
Dec 11 22:41:35.519 INFO [stderr]    |         help: remove this `mut`
Dec 11 22:41:35.519 INFO [stderr]    |
Dec 11 22:41:35.519 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 11 22:41:35.519 INFO [stderr] 
Dec 11 22:41:35.526 INFO [stderr] warning: function is never used: `test_mut_ref`
Dec 11 22:41:35.526 INFO [stderr]   --> src/main.rs:34:1
Dec 11 22:41:35.526 INFO [stderr]    |
Dec 11 22:41:35.526 INFO [stderr] 34 | fn test_mut_ref() {
Dec 11 22:41:35.526 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 11 22:41:35.526 INFO [stderr]    |
Dec 11 22:41:35.526 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 11 22:41:35.526 INFO [stderr] 
Dec 11 22:41:35.526 INFO [stderr] warning: function is never used: `copy_vec`
Dec 11 22:41:35.526 INFO [stderr]   --> src/main.rs:40:1
Dec 11 22:41:35.526 INFO [stderr]    |
Dec 11 22:41:35.526 INFO [stderr] 40 | fn copy_vec(from: &Vec<i32>, to: &mut Vec<i32>) {
Dec 11 22:41:35.526 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 22:41:35.526 INFO [stderr] 
Dec 11 22:41:35.584 INFO [stderr] warning: variable `result_ref` is assigned to, but never used
Dec 11 22:41:35.584 INFO [stderr]  --> src/main.rs:4:9
Dec 11 22:41:35.584 INFO [stderr]   |
Dec 11 22:41:35.584 INFO [stderr] 4 |     let result_ref;
Dec 11 22:41:35.584 INFO [stderr]   |         ^^^^^^^^^^
Dec 11 22:41:35.584 INFO [stderr]   |
Dec 11 22:41:35.584 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 11 22:41:35.584 INFO [stderr]   = note: consider using `_result_ref` instead
Dec 11 22:41:35.584 INFO [stderr] 
Dec 11 22:41:35.584 INFO [stderr] warning: value assigned to `result_ref` is never read
Dec 11 22:41:35.584 INFO [stderr]  --> src/main.rs:6:5
Dec 11 22:41:35.584 INFO [stderr]   |
Dec 11 22:41:35.584 INFO [stderr] 6 |     result_ref = which_is_greater(&a, &b)
Dec 11 22:41:35.584 INFO [stderr]   |     ^^^^^^^^^^
Dec 11 22:41:35.584 INFO [stderr]   |
Dec 11 22:41:35.584 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 11 22:41:35.584 INFO [stderr] 
Dec 11 22:41:35.584 INFO [stderr] warning: unused variable: `a`
Dec 11 22:41:35.584 INFO [stderr]   --> src/main.rs:25:29
Dec 11 22:41:35.584 INFO [stderr]    |
Dec 11 22:41:35.584 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 11 22:41:35.584 INFO [stderr]    |                             ^ help: consider using `_a` instead
Dec 11 22:41:35.584 INFO [stderr] 
Dec 11 22:41:35.584 INFO [stderr] warning: unused variable: `b`
Dec 11 22:41:35.584 INFO [stderr]   --> src/main.rs:25:41
Dec 11 22:41:35.584 INFO [stderr]    |
Dec 11 22:41:35.584 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 11 22:41:35.584 INFO [stderr]    |                                         ^ help: consider using `_b` instead
Dec 11 22:41:35.584 INFO [stderr] 
Dec 11 22:41:35.584 INFO [stderr] warning: unused variable: `vec1`
Dec 11 22:41:35.584 INFO [stderr]   --> src/main.rs:37:13
Dec 11 22:41:35.584 INFO [stderr]    |
Dec 11 22:41:35.584 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 11 22:41:35.585 INFO [stderr]    |             ^^^^ help: consider using `_vec1` instead
Dec 11 22:41:35.585 INFO [stderr] 
Dec 11 22:41:35.586 INFO [stderr] warning: variable does not need to be mutable
Dec 11 22:41:35.586 INFO [stderr]   --> src/main.rs:37:9
Dec 11 22:41:35.586 INFO [stderr]    |
Dec 11 22:41:35.586 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 11 22:41:35.586 INFO [stderr]    |         ----^^^^
Dec 11 22:41:35.586 INFO [stderr]    |         |
Dec 11 22:41:35.586 INFO [stderr]    |         help: remove this `mut`
Dec 11 22:41:35.586 INFO [stderr]    |
Dec 11 22:41:35.586 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 11 22:41:35.586 INFO [stderr] 
Dec 11 22:41:35.588 INFO [stderr] warning: function is never used: `test_mut_ref`
Dec 11 22:41:35.588 INFO [stderr]   --> src/main.rs:34:1
Dec 11 22:41:35.588 INFO [stderr]    |
Dec 11 22:41:35.588 INFO [stderr] 34 | fn test_mut_ref() {
Dec 11 22:41:35.588 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 11 22:41:35.588 INFO [stderr]    |
Dec 11 22:41:35.588 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 11 22:41:35.588 INFO [stderr] 
Dec 11 22:41:35.588 INFO [stderr] warning: function is never used: `copy_vec`
Dec 11 22:41:35.588 INFO [stderr]   --> src/main.rs:40:1
Dec 11 22:41:35.588 INFO [stderr]    |
Dec 11 22:41:35.588 INFO [stderr] 40 | fn copy_vec(from: &Vec<i32>, to: &mut Vec<i32>) {
Dec 11 22:41:35.588 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 22:41:35.588 INFO [stderr] 
Dec 11 22:41:35.626 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
Dec 11 22:41:35.628 INFO [stderr] su: No module specific data is present
Dec 11 22:41:41.124 INFO running `"docker" "inspect" "e38093b52e927fb27186b06fc31704958c03e3a91171e1e5cc38ef615ae84012"`
Dec 11 22:41:41.458 INFO running `"docker" "rm" "-f" "e38093b52e927fb27186b06fc31704958c03e3a91171e1e5cc38ef615ae84012"`
Dec 11 22:41:42.027 INFO [stdout] e38093b52e927fb27186b06fc31704958c03e3a91171e1e5cc38ef615ae84012