Dec 14 03:01:09.521 INFO testing amitdash291/rust_lifetimes against try#aa49d8ef14939ddec0e34b346b60174a5673d48f for pr-56550
Dec 14 03:01:09.521 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-2/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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 14 03:01:09.678 INFO [stdout] 9cfaeef0edf5323112b71fe7bb976d0a2eb95f82e10a16ab2595e63b3f20fa2d
Dec 14 03:01:09.680 INFO running `"docker" "start" "-a" "9cfaeef0edf5323112b71fe7bb976d0a2eb95f82e10a16ab2595e63b3f20fa2d"`
Dec 14 03:01:10.282 INFO [stderr] usermod: no changes
Dec 14 03:01:10.318 INFO [stderr]    Compiling lifetime_demo v0.1.0 (/source)
Dec 14 03:01:10.686 INFO [stderr] warning: variable `result_ref` is assigned to, but never used
Dec 14 03:01:10.686 INFO [stderr]  --> src/main.rs:4:9
Dec 14 03:01:10.686 INFO [stderr]   |
Dec 14 03:01:10.686 INFO [stderr] 4 |     let result_ref;
Dec 14 03:01:10.686 INFO [stderr]   |         ^^^^^^^^^^
Dec 14 03:01:10.686 INFO [stderr]   |
Dec 14 03:01:10.687 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 14 03:01:10.687 INFO [stderr]   = note: consider using `_result_ref` instead
Dec 14 03:01:10.687 INFO [stderr] 
Dec 14 03:01:10.687 INFO [stderr] warning: value assigned to `result_ref` is never read
Dec 14 03:01:10.687 INFO [stderr]  --> src/main.rs:6:5
Dec 14 03:01:10.687 INFO [stderr]   |
Dec 14 03:01:10.687 INFO [stderr] 6 |     result_ref = which_is_greater(&a, &b)
Dec 14 03:01:10.687 INFO [stderr]   |     ^^^^^^^^^^
Dec 14 03:01:10.687 INFO [stderr]   |
Dec 14 03:01:10.687 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 14 03:01:10.687 INFO [stderr] 
Dec 14 03:01:10.687 INFO [stderr] warning: unused variable: `a`
Dec 14 03:01:10.687 INFO [stderr]   --> src/main.rs:25:29
Dec 14 03:01:10.687 INFO [stderr]    |
Dec 14 03:01:10.687 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 14 03:01:10.687 INFO [stderr]    |                             ^ help: consider using `_a` instead
Dec 14 03:01:10.687 INFO [stderr] 
Dec 14 03:01:10.687 INFO [stderr] warning: unused variable: `b`
Dec 14 03:01:10.687 INFO [stderr]   --> src/main.rs:25:41
Dec 14 03:01:10.687 INFO [stderr]    |
Dec 14 03:01:10.687 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 14 03:01:10.687 INFO [stderr]    |                                         ^ help: consider using `_b` instead
Dec 14 03:01:10.687 INFO [stderr] 
Dec 14 03:01:10.687 INFO [stderr] warning: unused variable: `vec1`
Dec 14 03:01:10.687 INFO [stderr]   --> src/main.rs:37:13
Dec 14 03:01:10.687 INFO [stderr]    |
Dec 14 03:01:10.687 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 14 03:01:10.687 INFO [stderr]    |             ^^^^ help: consider using `_vec1` instead
Dec 14 03:01:10.687 INFO [stderr] 
Dec 14 03:01:10.694 INFO [stderr] warning: variable does not need to be mutable
Dec 14 03:01:10.694 INFO [stderr]   --> src/main.rs:37:9
Dec 14 03:01:10.694 INFO [stderr]    |
Dec 14 03:01:10.694 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 14 03:01:10.694 INFO [stderr]    |         ----^^^^
Dec 14 03:01:10.694 INFO [stderr]    |         |
Dec 14 03:01:10.694 INFO [stderr]    |         help: remove this `mut`
Dec 14 03:01:10.694 INFO [stderr]    |
Dec 14 03:01:10.694 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 14 03:01:10.694 INFO [stderr] 
Dec 14 03:01:10.694 INFO [stderr] warning: function is never used: `test_mut_ref`
Dec 14 03:01:10.694 INFO [stderr]   --> src/main.rs:34:1
Dec 14 03:01:10.694 INFO [stderr]    |
Dec 14 03:01:10.694 INFO [stderr] 34 | fn test_mut_ref() {
Dec 14 03:01:10.694 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 14 03:01:10.694 INFO [stderr]    |
Dec 14 03:01:10.694 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 14 03:01:10.694 INFO [stderr] 
Dec 14 03:01:10.694 INFO [stderr] warning: function is never used: `copy_vec`
Dec 14 03:01:10.694 INFO [stderr]   --> src/main.rs:40:1
Dec 14 03:01:10.694 INFO [stderr]    |
Dec 14 03:01:10.694 INFO [stderr] 40 | fn copy_vec(from: &Vec<i32>, to: &mut Vec<i32>) {
Dec 14 03:01:10.694 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 03:01:10.694 INFO [stderr] 
Dec 14 03:01:10.923 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
Dec 14 03:01:10.927 INFO [stderr] su: No module specific data is present
Dec 14 03:01:11.305 INFO running `"docker" "inspect" "9cfaeef0edf5323112b71fe7bb976d0a2eb95f82e10a16ab2595e63b3f20fa2d"`
Dec 14 03:01:11.376 INFO running `"docker" "rm" "-f" "9cfaeef0edf5323112b71fe7bb976d0a2eb95f82e10a16ab2595e63b3f20fa2d"`
Dec 14 03:01:11.461 INFO [stdout] 9cfaeef0edf5323112b71fe7bb976d0a2eb95f82e10a16ab2595e63b3f20fa2d
Dec 14 03:01:11.465 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-2/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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 14 03:01:11.660 INFO [stdout] 0f373831bc93fde21c9a28dd0a4d32db112b835effabe0e8e1e43d9dd73a4d61
Dec 14 03:01:11.664 INFO running `"docker" "start" "-a" "0f373831bc93fde21c9a28dd0a4d32db112b835effabe0e8e1e43d9dd73a4d61"`
Dec 14 03:01:12.130 INFO [stderr] usermod: no changes
Dec 14 03:01:12.158 INFO [stderr]    Compiling lifetime_demo v0.1.0 (/source)
Dec 14 03:01:12.527 INFO [stderr] warning: variable `result_ref` is assigned to, but never used
Dec 14 03:01:12.527 INFO [stderr]  --> src/main.rs:4:9
Dec 14 03:01:12.527 INFO [stderr]   |
Dec 14 03:01:12.527 INFO [stderr] 4 |     let result_ref;
Dec 14 03:01:12.527 INFO [stderr]   |         ^^^^^^^^^^
Dec 14 03:01:12.527 INFO [stderr]   |
Dec 14 03:01:12.527 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 14 03:01:12.527 INFO [stderr]   = note: consider using `_result_ref` instead
Dec 14 03:01:12.527 INFO [stderr] 
Dec 14 03:01:12.527 INFO [stderr] warning: value assigned to `result_ref` is never read
Dec 14 03:01:12.527 INFO [stderr]  --> src/main.rs:6:5
Dec 14 03:01:12.527 INFO [stderr]   |
Dec 14 03:01:12.527 INFO [stderr] 6 |     result_ref = which_is_greater(&a, &b)
Dec 14 03:01:12.527 INFO [stderr]   |     ^^^^^^^^^^
Dec 14 03:01:12.527 INFO [stderr]   |
Dec 14 03:01:12.527 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 14 03:01:12.527 INFO [stderr] 
Dec 14 03:01:12.527 INFO [stderr] warning: unused variable: `a`
Dec 14 03:01:12.527 INFO [stderr]   --> src/main.rs:25:29
Dec 14 03:01:12.527 INFO [stderr]    |
Dec 14 03:01:12.527 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 14 03:01:12.527 INFO [stderr]    |                             ^ help: consider using `_a` instead
Dec 14 03:01:12.527 INFO [stderr] 
Dec 14 03:01:12.527 INFO [stderr] warning: unused variable: `b`
Dec 14 03:01:12.527 INFO [stderr]   --> src/main.rs:25:41
Dec 14 03:01:12.527 INFO [stderr]    |
Dec 14 03:01:12.527 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 14 03:01:12.527 INFO [stderr]    |                                         ^ help: consider using `_b` instead
Dec 14 03:01:12.527 INFO [stderr] 
Dec 14 03:01:12.527 INFO [stderr] warning: unused variable: `vec1`
Dec 14 03:01:12.527 INFO [stderr]   --> src/main.rs:37:13
Dec 14 03:01:12.527 INFO [stderr]    |
Dec 14 03:01:12.527 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 14 03:01:12.527 INFO [stderr]    |             ^^^^ help: consider using `_vec1` instead
Dec 14 03:01:12.527 INFO [stderr] 
Dec 14 03:01:12.528 INFO [stderr] warning: variable does not need to be mutable
Dec 14 03:01:12.528 INFO [stderr]   --> src/main.rs:37:9
Dec 14 03:01:12.528 INFO [stderr]    |
Dec 14 03:01:12.528 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 14 03:01:12.528 INFO [stderr]    |         ----^^^^
Dec 14 03:01:12.528 INFO [stderr]    |         |
Dec 14 03:01:12.528 INFO [stderr]    |         help: remove this `mut`
Dec 14 03:01:12.528 INFO [stderr]    |
Dec 14 03:01:12.528 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 14 03:01:12.528 INFO [stderr] 
Dec 14 03:01:12.530 INFO [stderr] warning: function is never used: `test_mut_ref`
Dec 14 03:01:12.530 INFO [stderr]   --> src/main.rs:34:1
Dec 14 03:01:12.530 INFO [stderr]    |
Dec 14 03:01:12.530 INFO [stderr] 34 | fn test_mut_ref() {
Dec 14 03:01:12.530 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 14 03:01:12.530 INFO [stderr]    |
Dec 14 03:01:12.530 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 14 03:01:12.530 INFO [stderr] 
Dec 14 03:01:12.530 INFO [stderr] warning: function is never used: `copy_vec`
Dec 14 03:01:12.530 INFO [stderr]   --> src/main.rs:40:1
Dec 14 03:01:12.530 INFO [stderr]    |
Dec 14 03:01:12.530 INFO [stderr] 40 | fn copy_vec(from: &Vec<i32>, to: &mut Vec<i32>) {
Dec 14 03:01:12.530 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 03:01:12.530 INFO [stderr] 
Dec 14 03:01:12.757 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
Dec 14 03:01:12.759 INFO [stderr] su: No module specific data is present
Dec 14 03:01:17.360 INFO running `"docker" "inspect" "0f373831bc93fde21c9a28dd0a4d32db112b835effabe0e8e1e43d9dd73a4d61"`
Dec 14 03:01:17.407 INFO running `"docker" "rm" "-f" "0f373831bc93fde21c9a28dd0a4d32db112b835effabe0e8e1e43d9dd73a4d61"`
Dec 14 03:01:17.502 INFO [stdout] 0f373831bc93fde21c9a28dd0a4d32db112b835effabe0e8e1e43d9dd73a4d61
Dec 14 03:01:17.504 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-2/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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 14 03:01:19.100 INFO [stdout] 151a6fbb27d5dab417ff0850ef41626aad9d2a711b0c6dd005ae0f46aa7d7816
Dec 14 03:01:19.104 INFO running `"docker" "start" "-a" "151a6fbb27d5dab417ff0850ef41626aad9d2a711b0c6dd005ae0f46aa7d7816"`
Dec 14 03:01:19.831 INFO [stderr] usermod: no changes
Dec 14 03:01:19.851 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.00s
Dec 14 03:01:19.851 INFO [stderr]      Running /target/debug/deps/lifetime_demo-21d0dfed4410147c
Dec 14 03:01:19.854 INFO [stdout] 
Dec 14 03:01:19.854 INFO [stdout] running 0 tests
Dec 14 03:01:19.854 INFO [stdout] 
Dec 14 03:01:19.854 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 14 03:01:19.854 INFO [stdout] 
Dec 14 03:01:19.855 INFO [stderr] su: No module specific data is present
Dec 14 03:01:20.647 INFO running `"docker" "inspect" "151a6fbb27d5dab417ff0850ef41626aad9d2a711b0c6dd005ae0f46aa7d7816"`
Dec 14 03:01:20.696 INFO running `"docker" "rm" "-f" "151a6fbb27d5dab417ff0850ef41626aad9d2a711b0c6dd005ae0f46aa7d7816"`
Dec 14 03:01:20.813 INFO [stdout] 151a6fbb27d5dab417ff0850ef41626aad9d2a711b0c6dd005ae0f46aa7d7816