Dec 06 07:02:21.113 INFO testing amitdash291/rust_lifetimes against try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468 for pr-56514
Dec 06 07:02:21.114 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-3/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt build --frozen" "-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 06 07:02:21.274 INFO [stdout] 3b84a58eb49a7554c35005adfbb5a94eb53ed8de30808c1b5bec0cfc96d2b90a
Dec 06 07:02:21.281 INFO running `"docker" "start" "-a" "3b84a58eb49a7554c35005adfbb5a94eb53ed8de30808c1b5bec0cfc96d2b90a"`
Dec 06 07:02:21.752 INFO [stderr] usermod: no changes
Dec 06 07:02:21.775 INFO [stderr]    Compiling lifetime_demo v0.1.0 (/source)
Dec 06 07:02:22.108 INFO [stderr] warning: variable `result_ref` is assigned to, but never used
Dec 06 07:02:22.108 INFO [stderr]  --> src/main.rs:4:9
Dec 06 07:02:22.108 INFO [stderr]   |
Dec 06 07:02:22.108 INFO [stderr] 4 |     let result_ref;
Dec 06 07:02:22.108 INFO [stderr]   |         ^^^^^^^^^^
Dec 06 07:02:22.108 INFO [stderr]   |
Dec 06 07:02:22.108 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 06 07:02:22.108 INFO [stderr]   = note: consider using `_result_ref` instead
Dec 06 07:02:22.108 INFO [stderr] 
Dec 06 07:02:22.108 INFO [stderr] warning: value assigned to `result_ref` is never read
Dec 06 07:02:22.108 INFO [stderr]  --> src/main.rs:6:5
Dec 06 07:02:22.108 INFO [stderr]   |
Dec 06 07:02:22.108 INFO [stderr] 6 |     result_ref = which_is_greater(&a, &b)
Dec 06 07:02:22.108 INFO [stderr]   |     ^^^^^^^^^^
Dec 06 07:02:22.108 INFO [stderr]   |
Dec 06 07:02:22.108 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 06 07:02:22.108 INFO [stderr] 
Dec 06 07:02:22.108 INFO [stderr] warning: unused variable: `a`
Dec 06 07:02:22.108 INFO [stderr]   --> src/main.rs:25:29
Dec 06 07:02:22.108 INFO [stderr]    |
Dec 06 07:02:22.108 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 06 07:02:22.108 INFO [stderr]    |                             ^ help: consider using `_a` instead
Dec 06 07:02:22.108 INFO [stderr] 
Dec 06 07:02:22.108 INFO [stderr] warning: unused variable: `b`
Dec 06 07:02:22.108 INFO [stderr]   --> src/main.rs:25:41
Dec 06 07:02:22.108 INFO [stderr]    |
Dec 06 07:02:22.108 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 06 07:02:22.108 INFO [stderr]    |                                         ^ help: consider using `_b` instead
Dec 06 07:02:22.108 INFO [stderr] 
Dec 06 07:02:22.108 INFO [stderr] warning: unused variable: `vec1`
Dec 06 07:02:22.108 INFO [stderr]   --> src/main.rs:37:13
Dec 06 07:02:22.108 INFO [stderr]    |
Dec 06 07:02:22.108 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 06 07:02:22.108 INFO [stderr]    |             ^^^^ help: consider using `_vec1` instead
Dec 06 07:02:22.108 INFO [stderr] 
Dec 06 07:02:22.108 INFO [stderr] warning: variable does not need to be mutable
Dec 06 07:02:22.108 INFO [stderr]   --> src/main.rs:37:9
Dec 06 07:02:22.108 INFO [stderr]    |
Dec 06 07:02:22.108 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 06 07:02:22.108 INFO [stderr]    |         ----^^^^
Dec 06 07:02:22.108 INFO [stderr]    |         |
Dec 06 07:02:22.108 INFO [stderr]    |         help: remove this `mut`
Dec 06 07:02:22.108 INFO [stderr]    |
Dec 06 07:02:22.109 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 07:02:22.109 INFO [stderr] 
Dec 06 07:02:22.120 INFO [stderr] warning: function is never used: `test_mut_ref`
Dec 06 07:02:22.120 INFO [stderr]   --> src/main.rs:34:1
Dec 06 07:02:22.120 INFO [stderr]    |
Dec 06 07:02:22.120 INFO [stderr] 34 | fn test_mut_ref() {
Dec 06 07:02:22.120 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 06 07:02:22.120 INFO [stderr]    |
Dec 06 07:02:22.120 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 06 07:02:22.120 INFO [stderr] 
Dec 06 07:02:22.120 INFO [stderr] warning: function is never used: `copy_vec`
Dec 06 07:02:22.120 INFO [stderr]   --> src/main.rs:40:1
Dec 06 07:02:22.120 INFO [stderr]    |
Dec 06 07:02:22.120 INFO [stderr] 40 | fn copy_vec(from: &Vec<i32>, to: &mut Vec<i32>) {
Dec 06 07:02:22.120 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 07:02:22.120 INFO [stderr] 
Dec 06 07:02:22.344 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.57s
Dec 06 07:02:22.344 INFO [stderr] su: No module specific data is present
Dec 06 07:02:22.751 INFO running `"docker" "inspect" "3b84a58eb49a7554c35005adfbb5a94eb53ed8de30808c1b5bec0cfc96d2b90a"`
Dec 06 07:02:22.824 INFO running `"docker" "rm" "-f" "3b84a58eb49a7554c35005adfbb5a94eb53ed8de30808c1b5bec0cfc96d2b90a"`
Dec 06 07:02:22.918 INFO [stdout] 3b84a58eb49a7554c35005adfbb5a94eb53ed8de30808c1b5bec0cfc96d2b90a
Dec 06 07:02:22.922 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-3/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt test --frozen --no-run" "-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 06 07:02:23.084 INFO [stdout] 3fd42efac125774cdea81774b3eb490477ac0c275e8b565fbf3671fad1e2b42f
Dec 06 07:02:23.086 INFO running `"docker" "start" "-a" "3fd42efac125774cdea81774b3eb490477ac0c275e8b565fbf3671fad1e2b42f"`
Dec 06 07:02:23.524 INFO [stderr] usermod: no changes
Dec 06 07:02:23.555 INFO [stderr]    Compiling lifetime_demo v0.1.0 (/source)
Dec 06 07:02:23.958 INFO [stderr] warning: variable `result_ref` is assigned to, but never used
Dec 06 07:02:23.958 INFO [stderr]  --> src/main.rs:4:9
Dec 06 07:02:23.958 INFO [stderr]   |
Dec 06 07:02:23.958 INFO [stderr] 4 |     let result_ref;
Dec 06 07:02:23.958 INFO [stderr]   |         ^^^^^^^^^^
Dec 06 07:02:23.958 INFO [stderr]   |
Dec 06 07:02:23.958 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 06 07:02:23.958 INFO [stderr]   = note: consider using `_result_ref` instead
Dec 06 07:02:23.958 INFO [stderr] 
Dec 06 07:02:23.958 INFO [stderr] warning: value assigned to `result_ref` is never read
Dec 06 07:02:23.958 INFO [stderr]  --> src/main.rs:6:5
Dec 06 07:02:23.958 INFO [stderr]   |
Dec 06 07:02:23.958 INFO [stderr] 6 |     result_ref = which_is_greater(&a, &b)
Dec 06 07:02:23.958 INFO [stderr]   |     ^^^^^^^^^^
Dec 06 07:02:23.958 INFO [stderr]   |
Dec 06 07:02:23.958 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 06 07:02:23.958 INFO [stderr] 
Dec 06 07:02:23.958 INFO [stderr] warning: unused variable: `a`
Dec 06 07:02:23.958 INFO [stderr]   --> src/main.rs:25:29
Dec 06 07:02:23.958 INFO [stderr]    |
Dec 06 07:02:23.958 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 06 07:02:23.958 INFO [stderr]    |                             ^ help: consider using `_a` instead
Dec 06 07:02:23.958 INFO [stderr] 
Dec 06 07:02:23.958 INFO [stderr] warning: unused variable: `b`
Dec 06 07:02:23.958 INFO [stderr]   --> src/main.rs:25:41
Dec 06 07:02:23.958 INFO [stderr]    |
Dec 06 07:02:23.958 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 06 07:02:23.958 INFO [stderr]    |                                         ^ help: consider using `_b` instead
Dec 06 07:02:23.958 INFO [stderr] 
Dec 06 07:02:23.958 INFO [stderr] warning: unused variable: `vec1`
Dec 06 07:02:23.958 INFO [stderr]   --> src/main.rs:37:13
Dec 06 07:02:23.958 INFO [stderr]    |
Dec 06 07:02:23.958 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 06 07:02:23.958 INFO [stderr]    |             ^^^^ help: consider using `_vec1` instead
Dec 06 07:02:23.958 INFO [stderr] 
Dec 06 07:02:23.959 INFO [stderr] warning: variable does not need to be mutable
Dec 06 07:02:23.959 INFO [stderr]   --> src/main.rs:37:9
Dec 06 07:02:23.959 INFO [stderr]    |
Dec 06 07:02:23.959 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 06 07:02:23.959 INFO [stderr]    |         ----^^^^
Dec 06 07:02:23.959 INFO [stderr]    |         |
Dec 06 07:02:23.959 INFO [stderr]    |         help: remove this `mut`
Dec 06 07:02:23.959 INFO [stderr]    |
Dec 06 07:02:23.959 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 07:02:23.959 INFO [stderr] 
Dec 06 07:02:23.961 INFO [stderr] warning: function is never used: `test_mut_ref`
Dec 06 07:02:23.961 INFO [stderr]   --> src/main.rs:34:1
Dec 06 07:02:23.961 INFO [stderr]    |
Dec 06 07:02:23.961 INFO [stderr] 34 | fn test_mut_ref() {
Dec 06 07:02:23.961 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 06 07:02:23.961 INFO [stderr]    |
Dec 06 07:02:23.961 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 06 07:02:23.961 INFO [stderr] 
Dec 06 07:02:23.961 INFO [stderr] warning: function is never used: `copy_vec`
Dec 06 07:02:23.961 INFO [stderr]   --> src/main.rs:40:1
Dec 06 07:02:23.961 INFO [stderr]    |
Dec 06 07:02:23.961 INFO [stderr] 40 | fn copy_vec(from: &Vec<i32>, to: &mut Vec<i32>) {
Dec 06 07:02:23.961 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 07:02:23.961 INFO [stderr] 
Dec 06 07:02:24.202 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.66s
Dec 06 07:02:24.204 INFO [stderr] su: No module specific data is present
Dec 06 07:02:24.545 INFO running `"docker" "inspect" "3fd42efac125774cdea81774b3eb490477ac0c275e8b565fbf3671fad1e2b42f"`
Dec 06 07:02:24.630 INFO running `"docker" "rm" "-f" "3fd42efac125774cdea81774b3eb490477ac0c275e8b565fbf3671fad1e2b42f"`
Dec 06 07:02:24.701 INFO [stdout] 3fd42efac125774cdea81774b3eb490477ac0c275e8b565fbf3671fad1e2b42f
Dec 06 07:02:24.703 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-3/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt test --frozen" "-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 06 07:02:24.848 INFO [stdout] 1d3b55c91c16d660ed1ec36bd368811e91ed239e609b620f6345938fafe02e25
Dec 06 07:02:24.850 INFO running `"docker" "start" "-a" "1d3b55c91c16d660ed1ec36bd368811e91ed239e609b620f6345938fafe02e25"`
Dec 06 07:02:25.212 INFO [stderr] usermod: no changes
Dec 06 07:02:25.238 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Dec 06 07:02:25.238 INFO [stderr]      Running /target/debug/deps/lifetime_demo-d4d532fa1c135fb1
Dec 06 07:02:25.240 INFO [stdout] 
Dec 06 07:02:25.240 INFO [stdout] running 0 tests
Dec 06 07:02:25.240 INFO [stdout] 
Dec 06 07:02:25.240 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 07:02:25.240 INFO [stdout] 
Dec 06 07:02:25.242 INFO [stderr] su: No module specific data is present
Dec 06 07:02:25.511 INFO running `"docker" "inspect" "1d3b55c91c16d660ed1ec36bd368811e91ed239e609b620f6345938fafe02e25"`
Dec 06 07:02:25.605 INFO running `"docker" "rm" "-f" "1d3b55c91c16d660ed1ec36bd368811e91ed239e609b620f6345938fafe02e25"`
Dec 06 07:02:25.833 INFO [stdout] 1d3b55c91c16d660ed1ec36bd368811e91ed239e609b620f6345938fafe02e25