Dec 14 03:01:09.586 INFO testing amitdash291/rust_lifetimes against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 14 03:01:09.586 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-4/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 03:01:09.815 INFO [stdout] c453d7b35fbf68ecb4e0a9dbeca5df9b5e1ebcec6592c23567358a0c9a2a06e4
Dec 14 03:01:09.821 INFO running `"docker" "start" "-a" "c453d7b35fbf68ecb4e0a9dbeca5df9b5e1ebcec6592c23567358a0c9a2a06e4"`
Dec 14 03:01:10.519 INFO [stderr] usermod: no changes
Dec 14 03:01:10.559 INFO [stderr]    Compiling lifetime_demo v0.1.0 (/source)
Dec 14 03:01:10.974 INFO [stderr] warning: variable `result_ref` is assigned to, but never used
Dec 14 03:01:10.974 INFO [stderr]  --> src/main.rs:4:9
Dec 14 03:01:10.974 INFO [stderr]   |
Dec 14 03:01:10.974 INFO [stderr] 4 |     let result_ref;
Dec 14 03:01:10.974 INFO [stderr]   |         ^^^^^^^^^^
Dec 14 03:01:10.974 INFO [stderr]   |
Dec 14 03:01:10.974 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 14 03:01:10.974 INFO [stderr]   = note: consider using `_result_ref` instead
Dec 14 03:01:10.974 INFO [stderr] 
Dec 14 03:01:10.974 INFO [stderr] warning: value assigned to `result_ref` is never read
Dec 14 03:01:10.974 INFO [stderr]  --> src/main.rs:6:5
Dec 14 03:01:10.974 INFO [stderr]   |
Dec 14 03:01:10.974 INFO [stderr] 6 |     result_ref = which_is_greater(&a, &b)
Dec 14 03:01:10.974 INFO [stderr]   |     ^^^^^^^^^^
Dec 14 03:01:10.974 INFO [stderr]   |
Dec 14 03:01:10.974 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 14 03:01:10.974 INFO [stderr] 
Dec 14 03:01:10.974 INFO [stderr] warning: unused variable: `a`
Dec 14 03:01:10.974 INFO [stderr]   --> src/main.rs:25:29
Dec 14 03:01:10.974 INFO [stderr]    |
Dec 14 03:01:10.974 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 14 03:01:10.974 INFO [stderr]    |                             ^ help: consider using `_a` instead
Dec 14 03:01:10.974 INFO [stderr] 
Dec 14 03:01:10.974 INFO [stderr] warning: unused variable: `b`
Dec 14 03:01:10.974 INFO [stderr]   --> src/main.rs:25:41
Dec 14 03:01:10.974 INFO [stderr]    |
Dec 14 03:01:10.974 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 14 03:01:10.974 INFO [stderr]    |                                         ^ help: consider using `_b` instead
Dec 14 03:01:10.974 INFO [stderr] 
Dec 14 03:01:10.974 INFO [stderr] warning: unused variable: `vec1`
Dec 14 03:01:10.974 INFO [stderr]   --> src/main.rs:37:13
Dec 14 03:01:10.974 INFO [stderr]    |
Dec 14 03:01:10.974 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 14 03:01:10.974 INFO [stderr]    |             ^^^^ help: consider using `_vec1` instead
Dec 14 03:01:10.974 INFO [stderr] 
Dec 14 03:01:10.975 INFO [stderr] warning: variable does not need to be mutable
Dec 14 03:01:10.975 INFO [stderr]   --> src/main.rs:37:9
Dec 14 03:01:10.975 INFO [stderr]    |
Dec 14 03:01:10.975 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 14 03:01:10.975 INFO [stderr]    |         ----^^^^
Dec 14 03:01:10.975 INFO [stderr]    |         |
Dec 14 03:01:10.975 INFO [stderr]    |         help: remove this `mut`
Dec 14 03:01:10.975 INFO [stderr]    |
Dec 14 03:01:10.975 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 14 03:01:10.975 INFO [stderr] 
Dec 14 03:01:10.980 INFO [stderr] warning: function is never used: `test_mut_ref`
Dec 14 03:01:10.981 INFO [stderr]   --> src/main.rs:34:1
Dec 14 03:01:10.981 INFO [stderr]    |
Dec 14 03:01:10.981 INFO [stderr] 34 | fn test_mut_ref() {
Dec 14 03:01:10.981 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 14 03:01:10.981 INFO [stderr]    |
Dec 14 03:01:10.981 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 14 03:01:10.981 INFO [stderr] 
Dec 14 03:01:10.981 INFO [stderr] warning: function is never used: `copy_vec`
Dec 14 03:01:10.981 INFO [stderr]   --> src/main.rs:40:1
Dec 14 03:01:10.981 INFO [stderr]    |
Dec 14 03:01:10.981 INFO [stderr] 40 | fn copy_vec(from: &Vec<i32>, to: &mut Vec<i32>) {
Dec 14 03:01:10.981 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 03:01:10.981 INFO [stderr] 
Dec 14 03:01:11.215 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
Dec 14 03:01:11.219 INFO [stderr] su: No module specific data is present
Dec 14 03:01:11.516 INFO running `"docker" "inspect" "c453d7b35fbf68ecb4e0a9dbeca5df9b5e1ebcec6592c23567358a0c9a2a06e4"`
Dec 14 03:01:11.614 INFO running `"docker" "rm" "-f" "c453d7b35fbf68ecb4e0a9dbeca5df9b5e1ebcec6592c23567358a0c9a2a06e4"`
Dec 14 03:01:11.702 INFO [stdout] c453d7b35fbf68ecb4e0a9dbeca5df9b5e1ebcec6592c23567358a0c9a2a06e4
Dec 14 03:01:11.709 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-4/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 03:01:11.942 INFO [stdout] 48c7f6d0b186403745273b3f67dfe648f8e93503a0260b4c504a9a04f6dbea99
Dec 14 03:01:11.944 INFO running `"docker" "start" "-a" "48c7f6d0b186403745273b3f67dfe648f8e93503a0260b4c504a9a04f6dbea99"`
Dec 14 03:01:12.379 INFO [stderr] usermod: no changes
Dec 14 03:01:12.411 INFO [stderr]    Compiling lifetime_demo v0.1.0 (/source)
Dec 14 03:01:12.843 INFO [stderr] warning: variable `result_ref` is assigned to, but never used
Dec 14 03:01:12.843 INFO [stderr]  --> src/main.rs:4:9
Dec 14 03:01:12.843 INFO [stderr]   |
Dec 14 03:01:12.843 INFO [stderr] 4 |     let result_ref;
Dec 14 03:01:12.843 INFO [stderr]   |         ^^^^^^^^^^
Dec 14 03:01:12.843 INFO [stderr]   |
Dec 14 03:01:12.843 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 14 03:01:12.843 INFO [stderr]   = note: consider using `_result_ref` instead
Dec 14 03:01:12.843 INFO [stderr] 
Dec 14 03:01:12.843 INFO [stderr] warning: value assigned to `result_ref` is never read
Dec 14 03:01:12.843 INFO [stderr]  --> src/main.rs:6:5
Dec 14 03:01:12.843 INFO [stderr]   |
Dec 14 03:01:12.843 INFO [stderr] 6 |     result_ref = which_is_greater(&a, &b)
Dec 14 03:01:12.843 INFO [stderr]   |     ^^^^^^^^^^
Dec 14 03:01:12.843 INFO [stderr]   |
Dec 14 03:01:12.843 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 14 03:01:12.843 INFO [stderr] 
Dec 14 03:01:12.843 INFO [stderr] warning: unused variable: `a`
Dec 14 03:01:12.843 INFO [stderr]   --> src/main.rs:25:29
Dec 14 03:01:12.843 INFO [stderr]    |
Dec 14 03:01:12.843 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 14 03:01:12.843 INFO [stderr]    |                             ^ help: consider using `_a` instead
Dec 14 03:01:12.843 INFO [stderr] 
Dec 14 03:01:12.843 INFO [stderr] warning: unused variable: `b`
Dec 14 03:01:12.843 INFO [stderr]   --> src/main.rs:25:41
Dec 14 03:01:12.843 INFO [stderr]    |
Dec 14 03:01:12.843 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 14 03:01:12.843 INFO [stderr]    |                                         ^ help: consider using `_b` instead
Dec 14 03:01:12.843 INFO [stderr] 
Dec 14 03:01:12.843 INFO [stderr] warning: unused variable: `vec1`
Dec 14 03:01:12.843 INFO [stderr]   --> src/main.rs:37:13
Dec 14 03:01:12.843 INFO [stderr]    |
Dec 14 03:01:12.843 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 14 03:01:12.843 INFO [stderr]    |             ^^^^ help: consider using `_vec1` instead
Dec 14 03:01:12.843 INFO [stderr] 
Dec 14 03:01:12.843 INFO [stderr] warning: variable does not need to be mutable
Dec 14 03:01:12.843 INFO [stderr]   --> src/main.rs:37:9
Dec 14 03:01:12.843 INFO [stderr]    |
Dec 14 03:01:12.843 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 14 03:01:12.843 INFO [stderr]    |         ----^^^^
Dec 14 03:01:12.843 INFO [stderr]    |         |
Dec 14 03:01:12.843 INFO [stderr]    |         help: remove this `mut`
Dec 14 03:01:12.843 INFO [stderr]    |
Dec 14 03:01:12.843 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 14 03:01:12.843 INFO [stderr] 
Dec 14 03:01:12.847 INFO [stderr] warning: function is never used: `test_mut_ref`
Dec 14 03:01:12.847 INFO [stderr]   --> src/main.rs:34:1
Dec 14 03:01:12.847 INFO [stderr]    |
Dec 14 03:01:12.847 INFO [stderr] 34 | fn test_mut_ref() {
Dec 14 03:01:12.847 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 14 03:01:12.847 INFO [stderr]    |
Dec 14 03:01:12.847 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 14 03:01:12.847 INFO [stderr] 
Dec 14 03:01:12.847 INFO [stderr] warning: function is never used: `copy_vec`
Dec 14 03:01:12.847 INFO [stderr]   --> src/main.rs:40:1
Dec 14 03:01:12.847 INFO [stderr]    |
Dec 14 03:01:12.847 INFO [stderr] 40 | fn copy_vec(from: &Vec<i32>, to: &mut Vec<i32>) {
Dec 14 03:01:12.847 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 03:01:12.847 INFO [stderr] 
Dec 14 03:01:13.091 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.68s
Dec 14 03:01:13.095 INFO [stderr] su: No module specific data is present
Dec 14 03:01:18.922 INFO running `"docker" "inspect" "48c7f6d0b186403745273b3f67dfe648f8e93503a0260b4c504a9a04f6dbea99"`
Dec 14 03:01:19.308 INFO running `"docker" "rm" "-f" "48c7f6d0b186403745273b3f67dfe648f8e93503a0260b4c504a9a04f6dbea99"`
Dec 14 03:01:19.519 INFO [stdout] 48c7f6d0b186403745273b3f67dfe648f8e93503a0260b4c504a9a04f6dbea99
Dec 14 03:01:19.527 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-4/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 03:01:20.686 INFO [stdout] 71129e8281778e6c1c277c955938da6098797786919a1fcf2e8f36b63834343f
Dec 14 03:01:20.688 INFO running `"docker" "start" "-a" "71129e8281778e6c1c277c955938da6098797786919a1fcf2e8f36b63834343f"`
Dec 14 03:01:21.215 INFO [stderr] usermod: no changes
Dec 14 03:01:21.215 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Dec 14 03:01:21.215 INFO [stderr]      Running /target/debug/deps/lifetime_demo-cbb75d4b1da40703
Dec 14 03:01:21.215 INFO [stderr] su: No module specific data is present
Dec 14 03:01:21.215 INFO [stdout] 
Dec 14 03:01:21.215 INFO [stdout] running 0 tests
Dec 14 03:01:21.215 INFO [stdout] 
Dec 14 03:01:21.215 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 14 03:01:21.215 INFO [stdout] 
Dec 14 03:01:31.974 INFO running `"docker" "inspect" "71129e8281778e6c1c277c955938da6098797786919a1fcf2e8f36b63834343f"`
Dec 14 03:01:32.045 INFO running `"docker" "rm" "-f" "71129e8281778e6c1c277c955938da6098797786919a1fcf2e8f36b63834343f"`
Dec 14 03:01:34.053 INFO [stdout] 71129e8281778e6c1c277c955938da6098797786919a1fcf2e8f36b63834343f