Dec 06 07:02:22.458 INFO testing amitdash291/rust_lifetimes against master#906deae0790bd18681b937fe9a141a3c26cf1855 for pr-56514
Dec 06 07:02:22.458 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-5/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-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 07:02:22.745 INFO [stdout] 20ffe1cd9e69fff2a0af6a9ac086b5eb752b3ccca72a3e14e43c259070cd315f
Dec 06 07:02:22.747 INFO running `"docker" "start" "-a" "20ffe1cd9e69fff2a0af6a9ac086b5eb752b3ccca72a3e14e43c259070cd315f"`
Dec 06 07:02:23.141 INFO [stderr] usermod: no changes
Dec 06 07:02:23.173 INFO [stderr]    Compiling lifetime_demo v0.1.0 (/source)
Dec 06 07:02:23.493 INFO [stderr] warning: variable `result_ref` is assigned to, but never used
Dec 06 07:02:23.493 INFO [stderr]  --> src/main.rs:4:9
Dec 06 07:02:23.493 INFO [stderr]   |
Dec 06 07:02:23.493 INFO [stderr] 4 |     let result_ref;
Dec 06 07:02:23.493 INFO [stderr]   |         ^^^^^^^^^^
Dec 06 07:02:23.493 INFO [stderr]   |
Dec 06 07:02:23.493 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 06 07:02:23.493 INFO [stderr]   = note: consider using `_result_ref` instead
Dec 06 07:02:23.493 INFO [stderr] 
Dec 06 07:02:23.493 INFO [stderr] warning: value assigned to `result_ref` is never read
Dec 06 07:02:23.493 INFO [stderr]  --> src/main.rs:6:5
Dec 06 07:02:23.493 INFO [stderr]   |
Dec 06 07:02:23.493 INFO [stderr] 6 |     result_ref = which_is_greater(&a, &b)
Dec 06 07:02:23.493 INFO [stderr]   |     ^^^^^^^^^^
Dec 06 07:02:23.493 INFO [stderr]   |
Dec 06 07:02:23.493 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 06 07:02:23.493 INFO [stderr] 
Dec 06 07:02:23.493 INFO [stderr] warning: unused variable: `a`
Dec 06 07:02:23.493 INFO [stderr]   --> src/main.rs:25:29
Dec 06 07:02:23.493 INFO [stderr]    |
Dec 06 07:02:23.493 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 06 07:02:23.493 INFO [stderr]    |                             ^ help: consider using `_a` instead
Dec 06 07:02:23.493 INFO [stderr] 
Dec 06 07:02:23.493 INFO [stderr] warning: unused variable: `b`
Dec 06 07:02:23.493 INFO [stderr]   --> src/main.rs:25:41
Dec 06 07:02:23.493 INFO [stderr]    |
Dec 06 07:02:23.493 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 06 07:02:23.493 INFO [stderr]    |                                         ^ help: consider using `_b` instead
Dec 06 07:02:23.493 INFO [stderr] 
Dec 06 07:02:23.493 INFO [stderr] warning: unused variable: `vec1`
Dec 06 07:02:23.493 INFO [stderr]   --> src/main.rs:37:13
Dec 06 07:02:23.493 INFO [stderr]    |
Dec 06 07:02:23.493 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 06 07:02:23.493 INFO [stderr]    |             ^^^^ help: consider using `_vec1` instead
Dec 06 07:02:23.493 INFO [stderr] 
Dec 06 07:02:23.494 INFO [stderr] warning: variable does not need to be mutable
Dec 06 07:02:23.494 INFO [stderr]   --> src/main.rs:37:9
Dec 06 07:02:23.494 INFO [stderr]    |
Dec 06 07:02:23.494 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 06 07:02:23.494 INFO [stderr]    |         ----^^^^
Dec 06 07:02:23.494 INFO [stderr]    |         |
Dec 06 07:02:23.494 INFO [stderr]    |         help: remove this `mut`
Dec 06 07:02:23.494 INFO [stderr]    |
Dec 06 07:02:23.494 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 07:02:23.494 INFO [stderr] 
Dec 06 07:02:23.497 INFO [stderr] warning: function is never used: `test_mut_ref`
Dec 06 07:02:23.497 INFO [stderr]   --> src/main.rs:34:1
Dec 06 07:02:23.497 INFO [stderr]    |
Dec 06 07:02:23.497 INFO [stderr] 34 | fn test_mut_ref() {
Dec 06 07:02:23.497 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 06 07:02:23.497 INFO [stderr]    |
Dec 06 07:02:23.497 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 06 07:02:23.497 INFO [stderr] 
Dec 06 07:02:23.497 INFO [stderr] warning: function is never used: `copy_vec`
Dec 06 07:02:23.497 INFO [stderr]   --> src/main.rs:40:1
Dec 06 07:02:23.497 INFO [stderr]    |
Dec 06 07:02:23.497 INFO [stderr] 40 | fn copy_vec(from: &Vec<i32>, to: &mut Vec<i32>) {
Dec 06 07:02:23.497 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 07:02:23.497 INFO [stderr] 
Dec 06 07:02:23.658 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.49s
Dec 06 07:02:23.668 INFO [stderr] su: No module specific data is present
Dec 06 07:02:23.990 INFO running `"docker" "inspect" "20ffe1cd9e69fff2a0af6a9ac086b5eb752b3ccca72a3e14e43c259070cd315f"`
Dec 06 07:02:24.106 INFO running `"docker" "rm" "-f" "20ffe1cd9e69fff2a0af6a9ac086b5eb752b3ccca72a3e14e43c259070cd315f"`
Dec 06 07:02:24.224 INFO [stdout] 20ffe1cd9e69fff2a0af6a9ac086b5eb752b3ccca72a3e14e43c259070cd315f
Dec 06 07:02:24.230 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-5/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-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 07:02:24.482 INFO [stdout] c3ca8df5a988274b4e410fddfdbedb68f710d567aefdd3dc0b3f25a0ea08659f
Dec 06 07:02:24.484 INFO running `"docker" "start" "-a" "c3ca8df5a988274b4e410fddfdbedb68f710d567aefdd3dc0b3f25a0ea08659f"`
Dec 06 07:02:24.830 INFO [stderr] usermod: no changes
Dec 06 07:02:24.853 INFO [stderr]    Compiling lifetime_demo v0.1.0 (/source)
Dec 06 07:02:25.183 INFO [stderr] warning: variable `result_ref` is assigned to, but never used
Dec 06 07:02:25.183 INFO [stderr]  --> src/main.rs:4:9
Dec 06 07:02:25.183 INFO [stderr]   |
Dec 06 07:02:25.183 INFO [stderr] 4 |     let result_ref;
Dec 06 07:02:25.183 INFO [stderr]   |         ^^^^^^^^^^
Dec 06 07:02:25.183 INFO [stderr]   |
Dec 06 07:02:25.183 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 06 07:02:25.183 INFO [stderr]   = note: consider using `_result_ref` instead
Dec 06 07:02:25.183 INFO [stderr] 
Dec 06 07:02:25.183 INFO [stderr] warning: value assigned to `result_ref` is never read
Dec 06 07:02:25.183 INFO [stderr]  --> src/main.rs:6:5
Dec 06 07:02:25.183 INFO [stderr]   |
Dec 06 07:02:25.183 INFO [stderr] 6 |     result_ref = which_is_greater(&a, &b)
Dec 06 07:02:25.183 INFO [stderr]   |     ^^^^^^^^^^
Dec 06 07:02:25.183 INFO [stderr]   |
Dec 06 07:02:25.183 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 06 07:02:25.183 INFO [stderr] 
Dec 06 07:02:25.183 INFO [stderr] warning: unused variable: `a`
Dec 06 07:02:25.183 INFO [stderr]   --> src/main.rs:25:29
Dec 06 07:02:25.183 INFO [stderr]    |
Dec 06 07:02:25.183 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 06 07:02:25.183 INFO [stderr]    |                             ^ help: consider using `_a` instead
Dec 06 07:02:25.183 INFO [stderr] 
Dec 06 07:02:25.183 INFO [stderr] warning: unused variable: `b`
Dec 06 07:02:25.183 INFO [stderr]   --> src/main.rs:25:41
Dec 06 07:02:25.183 INFO [stderr]    |
Dec 06 07:02:25.183 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Dec 06 07:02:25.183 INFO [stderr]    |                                         ^ help: consider using `_b` instead
Dec 06 07:02:25.183 INFO [stderr] 
Dec 06 07:02:25.183 INFO [stderr] warning: unused variable: `vec1`
Dec 06 07:02:25.183 INFO [stderr]   --> src/main.rs:37:13
Dec 06 07:02:25.183 INFO [stderr]    |
Dec 06 07:02:25.183 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 06 07:02:25.183 INFO [stderr]    |             ^^^^ help: consider using `_vec1` instead
Dec 06 07:02:25.183 INFO [stderr] 
Dec 06 07:02:25.183 INFO [stderr] warning: variable does not need to be mutable
Dec 06 07:02:25.183 INFO [stderr]   --> src/main.rs:37:9
Dec 06 07:02:25.183 INFO [stderr]    |
Dec 06 07:02:25.183 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Dec 06 07:02:25.183 INFO [stderr]    |         ----^^^^
Dec 06 07:02:25.183 INFO [stderr]    |         |
Dec 06 07:02:25.183 INFO [stderr]    |         help: remove this `mut`
Dec 06 07:02:25.183 INFO [stderr]    |
Dec 06 07:02:25.183 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 07:02:25.183 INFO [stderr] 
Dec 06 07:02:25.185 INFO [stderr] warning: function is never used: `test_mut_ref`
Dec 06 07:02:25.185 INFO [stderr]   --> src/main.rs:34:1
Dec 06 07:02:25.185 INFO [stderr]    |
Dec 06 07:02:25.185 INFO [stderr] 34 | fn test_mut_ref() {
Dec 06 07:02:25.185 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 06 07:02:25.185 INFO [stderr]    |
Dec 06 07:02:25.185 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 06 07:02:25.185 INFO [stderr] 
Dec 06 07:02:25.188 INFO [stderr] warning: function is never used: `copy_vec`
Dec 06 07:02:25.188 INFO [stderr]   --> src/main.rs:40:1
Dec 06 07:02:25.188 INFO [stderr]    |
Dec 06 07:02:25.188 INFO [stderr] 40 | fn copy_vec(from: &Vec<i32>, to: &mut Vec<i32>) {
Dec 06 07:02:25.188 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 07:02:25.188 INFO [stderr] 
Dec 06 07:02:25.393 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.54s
Dec 06 07:02:25.397 INFO [stderr] su: No module specific data is present
Dec 06 07:02:25.667 INFO running `"docker" "inspect" "c3ca8df5a988274b4e410fddfdbedb68f710d567aefdd3dc0b3f25a0ea08659f"`
Dec 06 07:02:25.879 INFO running `"docker" "rm" "-f" "c3ca8df5a988274b4e410fddfdbedb68f710d567aefdd3dc0b3f25a0ea08659f"`
Dec 06 07:02:25.960 INFO [stdout] c3ca8df5a988274b4e410fddfdbedb68f710d567aefdd3dc0b3f25a0ea08659f
Dec 06 07:02:25.962 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-5/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-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 07:02:26.137 INFO [stdout] 1ed3a2c4c52e56b4c6d932a4c202e8dba14e7acf37cfe029760f97ea5b726229
Dec 06 07:02:26.139 INFO running `"docker" "start" "-a" "1ed3a2c4c52e56b4c6d932a4c202e8dba14e7acf37cfe029760f97ea5b726229"`
Dec 06 07:02:26.485 INFO [stderr] usermod: no changes
Dec 06 07:02:26.511 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Dec 06 07:02:26.511 INFO [stderr]      Running /target/debug/deps/lifetime_demo-0d88e8043c1bbfcd
Dec 06 07:02:26.513 INFO [stdout] 
Dec 06 07:02:26.513 INFO [stdout] running 0 tests
Dec 06 07:02:26.513 INFO [stdout] 
Dec 06 07:02:26.513 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 07:02:26.513 INFO [stdout] 
Dec 06 07:02:26.514 INFO [stderr] su: No module specific data is present
Dec 06 07:02:26.781 INFO running `"docker" "inspect" "1ed3a2c4c52e56b4c6d932a4c202e8dba14e7acf37cfe029760f97ea5b726229"`
Dec 06 07:02:26.881 INFO running `"docker" "rm" "-f" "1ed3a2c4c52e56b4c6d932a4c202e8dba14e7acf37cfe029760f97ea5b726229"`
Dec 06 07:02:26.961 INFO [stdout] 1ed3a2c4c52e56b4c6d932a4c202e8dba14e7acf37cfe029760f97ea5b726229