Nov 30 07:07:48.410 INFO checking amitdash291/rust_lifetimes against try#32252761328f59ccfadb1bafb8148c685bc830b3 for pr-56323
Nov 30 07:07:48.410 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-4/try#32252761328f59ccfadb1bafb8148c685bc830b3:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/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 30 07:07:48.971 INFO [stdout] c68f2810d6ab4f4a99ace72effea5839d693a7a9aff8cec3b552f0356c705609
Nov 30 07:07:48.978 INFO running `"docker" "start" "-a" "c68f2810d6ab4f4a99ace72effea5839d693a7a9aff8cec3b552f0356c705609"`
Nov 30 07:07:50.140 INFO [stderr] usermod: no changes
Nov 30 07:07:50.201 INFO [stderr]     Checking lifetime_demo v0.1.0 (/source)
Nov 30 07:07:50.630 INFO [stderr] warning: variable `result_ref` is assigned to, but never used
Nov 30 07:07:50.630 INFO [stderr]  --> src/main.rs:4:9
Nov 30 07:07:50.630 INFO [stderr]   |
Nov 30 07:07:50.630 INFO [stderr] 4 |     let result_ref;
Nov 30 07:07:50.630 INFO [stderr]   |         ^^^^^^^^^^
Nov 30 07:07:50.630 INFO [stderr]   |
Nov 30 07:07:50.630 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Nov 30 07:07:50.630 INFO [stderr]   = note: consider using `_result_ref` instead
Nov 30 07:07:50.630 INFO [stderr] 
Nov 30 07:07:50.630 INFO [stderr] warning: value assigned to `result_ref` is never read
Nov 30 07:07:50.630 INFO [stderr]  --> src/main.rs:6:5
Nov 30 07:07:50.630 INFO [stderr]   |
Nov 30 07:07:50.630 INFO [stderr] 6 |     result_ref = which_is_greater(&a, &b)
Nov 30 07:07:50.630 INFO [stderr]   |     ^^^^^^^^^^
Nov 30 07:07:50.630 INFO [stderr]   |
Nov 30 07:07:50.630 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Nov 30 07:07:50.630 INFO [stderr] 
Nov 30 07:07:50.630 INFO [stderr] warning: unused variable: `a`
Nov 30 07:07:50.630 INFO [stderr]   --> src/main.rs:25:29
Nov 30 07:07:50.630 INFO [stderr]    |
Nov 30 07:07:50.630 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Nov 30 07:07:50.630 INFO [stderr]    |                             ^ help: consider using `_a` instead
Nov 30 07:07:50.630 INFO [stderr] 
Nov 30 07:07:50.630 INFO [stderr] warning: unused variable: `b`
Nov 30 07:07:50.630 INFO [stderr]   --> src/main.rs:25:41
Nov 30 07:07:50.630 INFO [stderr]    |
Nov 30 07:07:50.631 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Nov 30 07:07:50.631 INFO [stderr]    |                                         ^ help: consider using `_b` instead
Nov 30 07:07:50.631 INFO [stderr] 
Nov 30 07:07:50.631 INFO [stderr] warning: unused variable: `vec1`
Nov 30 07:07:50.631 INFO [stderr]   --> src/main.rs:37:13
Nov 30 07:07:50.631 INFO [stderr]    |
Nov 30 07:07:50.631 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Nov 30 07:07:50.631 INFO [stderr]    |             ^^^^ help: consider using `_vec1` instead
Nov 30 07:07:50.631 INFO [stderr] 
Nov 30 07:07:50.631 INFO [stderr] warning: variable does not need to be mutable
Nov 30 07:07:50.631 INFO [stderr]   --> src/main.rs:37:9
Nov 30 07:07:50.631 INFO [stderr]    |
Nov 30 07:07:50.631 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Nov 30 07:07:50.631 INFO [stderr]    |         ----^^^^
Nov 30 07:07:50.631 INFO [stderr]    |         |
Nov 30 07:07:50.631 INFO [stderr]    |         help: remove this `mut`
Nov 30 07:07:50.631 INFO [stderr]    |
Nov 30 07:07:50.631 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 30 07:07:50.631 INFO [stderr] 
Nov 30 07:07:50.631 INFO [stderr] warning: function is never used: `test_mut_ref`
Nov 30 07:07:50.631 INFO [stderr]   --> src/main.rs:34:1
Nov 30 07:07:50.631 INFO [stderr]    |
Nov 30 07:07:50.631 INFO [stderr] 34 | fn test_mut_ref() {
Nov 30 07:07:50.631 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Nov 30 07:07:50.631 INFO [stderr]    |
Nov 30 07:07:50.631 INFO [stderr]    = note: #[warn(dead_code)] on by default
Nov 30 07:07:50.631 INFO [stderr] 
Nov 30 07:07:50.631 INFO [stderr] warning: function is never used: `copy_vec`
Nov 30 07:07:50.631 INFO [stderr]   --> src/main.rs:40:1
Nov 30 07:07:50.631 INFO [stderr]    |
Nov 30 07:07:50.631 INFO [stderr] 40 | fn copy_vec(from: &Vec<i32>, to: &mut Vec<i32>) {
Nov 30 07:07:50.631 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 07:07:50.631 INFO [stderr] 
Nov 30 07:07:50.704 INFO [stderr] warning: variable `result_ref` is assigned to, but never used
Nov 30 07:07:50.704 INFO [stderr]  --> src/main.rs:4:9
Nov 30 07:07:50.704 INFO [stderr]   |
Nov 30 07:07:50.704 INFO [stderr] 4 |     let result_ref;
Nov 30 07:07:50.704 INFO [stderr]   |         ^^^^^^^^^^
Nov 30 07:07:50.704 INFO [stderr]   |
Nov 30 07:07:50.704 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Nov 30 07:07:50.712 INFO [stderr]   = note: consider using `_result_ref` instead
Nov 30 07:07:50.712 INFO [stderr] 
Nov 30 07:07:50.712 INFO [stderr] warning: value assigned to `result_ref` is never read
Nov 30 07:07:50.712 INFO [stderr]  --> src/main.rs:6:5
Nov 30 07:07:50.712 INFO [stderr]   |
Nov 30 07:07:50.713 INFO [stderr] 6 |     result_ref = which_is_greater(&a, &b)
Nov 30 07:07:50.713 INFO [stderr]   |     ^^^^^^^^^^
Nov 30 07:07:50.713 INFO [stderr]   |
Nov 30 07:07:50.713 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Nov 30 07:07:50.713 INFO [stderr] 
Nov 30 07:07:50.713 INFO [stderr] warning: unused variable: `a`
Nov 30 07:07:50.713 INFO [stderr]   --> src/main.rs:25:29
Nov 30 07:07:50.713 INFO [stderr]    |
Nov 30 07:07:50.713 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Nov 30 07:07:50.713 INFO [stderr]    |                             ^ help: consider using `_a` instead
Nov 30 07:07:50.713 INFO [stderr] 
Nov 30 07:07:50.713 INFO [stderr] warning: unused variable: `b`
Nov 30 07:07:50.713 INFO [stderr]   --> src/main.rs:25:41
Nov 30 07:07:50.713 INFO [stderr]    |
Nov 30 07:07:50.713 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Nov 30 07:07:50.713 INFO [stderr]    |                                         ^ help: consider using `_b` instead
Nov 30 07:07:50.713 INFO [stderr] 
Nov 30 07:07:50.713 INFO [stderr] warning: unused variable: `vec1`
Nov 30 07:07:50.713 INFO [stderr]   --> src/main.rs:37:13
Nov 30 07:07:50.713 INFO [stderr]    |
Nov 30 07:07:50.713 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Nov 30 07:07:50.713 INFO [stderr]    |             ^^^^ help: consider using `_vec1` instead
Nov 30 07:07:50.713 INFO [stderr] 
Nov 30 07:07:50.713 INFO [stderr] warning: variable does not need to be mutable
Nov 30 07:07:50.713 INFO [stderr]   --> src/main.rs:37:9
Nov 30 07:07:50.713 INFO [stderr]    |
Nov 30 07:07:50.713 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Nov 30 07:07:50.713 INFO [stderr]    |         ----^^^^
Nov 30 07:07:50.713 INFO [stderr]    |         |
Nov 30 07:07:50.713 INFO [stderr]    |         help: remove this `mut`
Nov 30 07:07:50.713 INFO [stderr]    |
Nov 30 07:07:50.713 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 30 07:07:50.713 INFO [stderr] 
Nov 30 07:07:50.713 INFO [stderr] warning: function is never used: `test_mut_ref`
Nov 30 07:07:50.713 INFO [stderr]   --> src/main.rs:34:1
Nov 30 07:07:50.713 INFO [stderr]    |
Nov 30 07:07:50.713 INFO [stderr] 34 | fn test_mut_ref() {
Nov 30 07:07:50.713 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Nov 30 07:07:50.713 INFO [stderr]    |
Nov 30 07:07:50.713 INFO [stderr]    = note: #[warn(dead_code)] on by default
Nov 30 07:07:50.713 INFO [stderr] 
Nov 30 07:07:50.713 INFO [stderr] warning: function is never used: `copy_vec`
Nov 30 07:07:50.713 INFO [stderr]   --> src/main.rs:40:1
Nov 30 07:07:50.713 INFO [stderr]    |
Nov 30 07:07:50.713 INFO [stderr] 40 | fn copy_vec(from: &Vec<i32>, to: &mut Vec<i32>) {
Nov 30 07:07:50.713 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 07:07:50.713 INFO [stderr] 
Nov 30 07:07:50.744 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
Nov 30 07:07:50.744 INFO [stderr] su: No module specific data is present
Nov 30 07:07:53.022 INFO running `"docker" "inspect" "c68f2810d6ab4f4a99ace72effea5839d693a7a9aff8cec3b552f0356c705609"`
Nov 30 07:07:53.252 INFO running `"docker" "rm" "-f" "c68f2810d6ab4f4a99ace72effea5839d693a7a9aff8cec3b552f0356c705609"`
Nov 30 07:07:53.620 INFO [stdout] c68f2810d6ab4f4a99ace72effea5839d693a7a9aff8cec3b552f0356c705609