Nov 17 09:30:32.285 INFO testing amitdash291/rust_lifetimes against try#2e026d6e5d7621634147ad4c8074f1d964dbb1be for pr-55982
Nov 17 09:30:32.285 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-6/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-55982/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/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 +2e026d6e5d7621634147ad4c8074f1d964dbb1be-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"`
Nov 17 09:30:32.635 INFO [stdout] 823c8e4c5ba5fcb005e807d2781c7a4198265f5d2d370b12dbf829e34fe23934
Nov 17 09:30:32.636 INFO running `"docker" "start" "-a" "823c8e4c5ba5fcb005e807d2781c7a4198265f5d2d370b12dbf829e34fe23934"`
Nov 17 09:30:33.895 INFO [stderr] usermod: no changes
Nov 17 09:30:33.967 INFO [stderr]    Compiling lifetime_demo v0.1.0 (/source)
Nov 17 09:30:34.278 INFO [stderr] warning: variable `result_ref` is assigned to, but never used
Nov 17 09:30:34.278 INFO [stderr]  --> src/main.rs:4:9
Nov 17 09:30:34.278 INFO [stderr]   |
Nov 17 09:30:34.278 INFO [stderr] 4 |     let result_ref;
Nov 17 09:30:34.278 INFO [stderr]   |         ^^^^^^^^^^
Nov 17 09:30:34.278 INFO [stderr]   |
Nov 17 09:30:34.278 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Nov 17 09:30:34.278 INFO [stderr]   = note: consider using `_result_ref` instead
Nov 17 09:30:34.278 INFO [stderr] 
Nov 17 09:30:34.278 INFO [stderr] warning: value assigned to `result_ref` is never read
Nov 17 09:30:34.278 INFO [stderr]  --> src/main.rs:6:5
Nov 17 09:30:34.278 INFO [stderr]   |
Nov 17 09:30:34.278 INFO [stderr] 6 |     result_ref = which_is_greater(&a, &b)
Nov 17 09:30:34.278 INFO [stderr]   |     ^^^^^^^^^^
Nov 17 09:30:34.278 INFO [stderr]   |
Nov 17 09:30:34.278 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Nov 17 09:30:34.278 INFO [stderr] 
Nov 17 09:30:34.278 INFO [stderr] warning: unused variable: `a`
Nov 17 09:30:34.278 INFO [stderr]   --> src/main.rs:25:29
Nov 17 09:30:34.278 INFO [stderr]    |
Nov 17 09:30:34.278 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Nov 17 09:30:34.279 INFO [stderr]    |                             ^ help: consider using `_a` instead
Nov 17 09:30:34.279 INFO [stderr] 
Nov 17 09:30:34.279 INFO [stderr] warning: unused variable: `b`
Nov 17 09:30:34.279 INFO [stderr]   --> src/main.rs:25:41
Nov 17 09:30:34.279 INFO [stderr]    |
Nov 17 09:30:34.279 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Nov 17 09:30:34.279 INFO [stderr]    |                                         ^ help: consider using `_b` instead
Nov 17 09:30:34.279 INFO [stderr] 
Nov 17 09:30:34.279 INFO [stderr] warning: unused variable: `vec1`
Nov 17 09:30:34.279 INFO [stderr]   --> src/main.rs:37:13
Nov 17 09:30:34.279 INFO [stderr]    |
Nov 17 09:30:34.279 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Nov 17 09:30:34.279 INFO [stderr]    |             ^^^^ help: consider using `_vec1` instead
Nov 17 09:30:34.279 INFO [stderr] 
Nov 17 09:30:34.279 INFO [stderr] warning: variable does not need to be mutable
Nov 17 09:30:34.279 INFO [stderr]   --> src/main.rs:37:9
Nov 17 09:30:34.279 INFO [stderr]    |
Nov 17 09:30:34.279 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Nov 17 09:30:34.279 INFO [stderr]    |         ----^^^^
Nov 17 09:30:34.279 INFO [stderr]    |         |
Nov 17 09:30:34.279 INFO [stderr]    |         help: remove this `mut`
Nov 17 09:30:34.279 INFO [stderr]    |
Nov 17 09:30:34.279 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 17 09:30:34.279 INFO [stderr] 
Nov 17 09:30:34.295 INFO [stderr] warning: function is never used: `test_mut_ref`
Nov 17 09:30:34.295 INFO [stderr]   --> src/main.rs:34:1
Nov 17 09:30:34.295 INFO [stderr]    |
Nov 17 09:30:34.295 INFO [stderr] 34 | fn test_mut_ref() {
Nov 17 09:30:34.295 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Nov 17 09:30:34.295 INFO [stderr]    |
Nov 17 09:30:34.295 INFO [stderr]    = note: #[warn(dead_code)] on by default
Nov 17 09:30:34.295 INFO [stderr] 
Nov 17 09:30:34.295 INFO [stderr] warning: function is never used: `copy_vec`
Nov 17 09:30:34.295 INFO [stderr]   --> src/main.rs:40:1
Nov 17 09:30:34.295 INFO [stderr]    |
Nov 17 09:30:34.295 INFO [stderr] 40 | fn copy_vec(from: &Vec<i32>, to: &mut Vec<i32>) {
Nov 17 09:30:34.295 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 17 09:30:34.295 INFO [stderr] 
Nov 17 09:30:34.622 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.70s
Nov 17 09:30:34.624 INFO [stderr] su: No module specific data is present
Nov 17 09:30:35.295 INFO running `"docker" "inspect" "823c8e4c5ba5fcb005e807d2781c7a4198265f5d2d370b12dbf829e34fe23934"`
Nov 17 09:30:35.575 INFO running `"docker" "rm" "-f" "823c8e4c5ba5fcb005e807d2781c7a4198265f5d2d370b12dbf829e34fe23934"`
Nov 17 09:30:35.859 INFO [stdout] 823c8e4c5ba5fcb005e807d2781c7a4198265f5d2d370b12dbf829e34fe23934
Nov 17 09:30:35.863 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-6/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-55982/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/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 +2e026d6e5d7621634147ad4c8074f1d964dbb1be-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"`
Nov 17 09:30:36.295 INFO [stdout] fa5cebcb9c3419dac38a4639444ea4857998a9145d841275d7b277f3046ae961
Nov 17 09:30:36.303 INFO running `"docker" "start" "-a" "fa5cebcb9c3419dac38a4639444ea4857998a9145d841275d7b277f3046ae961"`
Nov 17 09:30:37.452 INFO [stderr] usermod: no changes
Nov 17 09:30:37.499 INFO [stderr]    Compiling lifetime_demo v0.1.0 (/source)
Nov 17 09:30:37.971 INFO [stderr] warning: variable `result_ref` is assigned to, but never used
Nov 17 09:30:37.971 INFO [stderr]  --> src/main.rs:4:9
Nov 17 09:30:37.971 INFO [stderr]   |
Nov 17 09:30:37.971 INFO [stderr] 4 |     let result_ref;
Nov 17 09:30:37.971 INFO [stderr]   |         ^^^^^^^^^^
Nov 17 09:30:37.971 INFO [stderr]   |
Nov 17 09:30:37.971 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Nov 17 09:30:37.971 INFO [stderr]   = note: consider using `_result_ref` instead
Nov 17 09:30:37.971 INFO [stderr] 
Nov 17 09:30:37.971 INFO [stderr] warning: value assigned to `result_ref` is never read
Nov 17 09:30:37.971 INFO [stderr]  --> src/main.rs:6:5
Nov 17 09:30:37.971 INFO [stderr]   |
Nov 17 09:30:37.971 INFO [stderr] 6 |     result_ref = which_is_greater(&a, &b)
Nov 17 09:30:37.971 INFO [stderr]   |     ^^^^^^^^^^
Nov 17 09:30:37.971 INFO [stderr]   |
Nov 17 09:30:37.971 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Nov 17 09:30:37.971 INFO [stderr] 
Nov 17 09:30:37.971 INFO [stderr] warning: unused variable: `a`
Nov 17 09:30:37.971 INFO [stderr]   --> src/main.rs:25:29
Nov 17 09:30:37.971 INFO [stderr]    |
Nov 17 09:30:37.971 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Nov 17 09:30:37.971 INFO [stderr]    |                             ^ help: consider using `_a` instead
Nov 17 09:30:37.971 INFO [stderr] 
Nov 17 09:30:37.971 INFO [stderr] warning: unused variable: `b`
Nov 17 09:30:37.971 INFO [stderr]   --> src/main.rs:25:41
Nov 17 09:30:37.971 INFO [stderr]    |
Nov 17 09:30:37.971 INFO [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 {
Nov 17 09:30:37.971 INFO [stderr]    |                                         ^ help: consider using `_b` instead
Nov 17 09:30:37.971 INFO [stderr] 
Nov 17 09:30:37.971 INFO [stderr] warning: unused variable: `vec1`
Nov 17 09:30:37.971 INFO [stderr]   --> src/main.rs:37:13
Nov 17 09:30:37.971 INFO [stderr]    |
Nov 17 09:30:37.971 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Nov 17 09:30:37.971 INFO [stderr]    |             ^^^^ help: consider using `_vec1` instead
Nov 17 09:30:37.971 INFO [stderr] 
Nov 17 09:30:37.975 INFO [stderr] warning: variable does not need to be mutable
Nov 17 09:30:37.975 INFO [stderr]   --> src/main.rs:37:9
Nov 17 09:30:37.975 INFO [stderr]    |
Nov 17 09:30:37.975 INFO [stderr] 37 |     let mut vec1: Vec<i32> = Vec::new();
Nov 17 09:30:37.975 INFO [stderr]    |         ----^^^^
Nov 17 09:30:37.975 INFO [stderr]    |         |
Nov 17 09:30:37.975 INFO [stderr]    |         help: remove this `mut`
Nov 17 09:30:37.975 INFO [stderr]    |
Nov 17 09:30:37.975 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 17 09:30:37.975 INFO [stderr] 
Nov 17 09:30:37.975 INFO [stderr] warning: function is never used: `test_mut_ref`
Nov 17 09:30:37.975 INFO [stderr]   --> src/main.rs:34:1
Nov 17 09:30:37.975 INFO [stderr]    |
Nov 17 09:30:37.975 INFO [stderr] 34 | fn test_mut_ref() {
Nov 17 09:30:37.975 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Nov 17 09:30:37.975 INFO [stderr]    |
Nov 17 09:30:37.975 INFO [stderr]    = note: #[warn(dead_code)] on by default
Nov 17 09:30:37.975 INFO [stderr] 
Nov 17 09:30:37.975 INFO [stderr] warning: function is never used: `copy_vec`
Nov 17 09:30:37.975 INFO [stderr]   --> src/main.rs:40:1
Nov 17 09:30:37.975 INFO [stderr]    |
Nov 17 09:30:37.975 INFO [stderr] 40 | fn copy_vec(from: &Vec<i32>, to: &mut Vec<i32>) {
Nov 17 09:30:37.975 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 17 09:30:37.975 INFO [stderr] 
Nov 17 09:30:38.340 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
Nov 17 09:30:38.342 INFO [stderr] su: No module specific data is present
Nov 17 09:30:39.551 INFO running `"docker" "inspect" "fa5cebcb9c3419dac38a4639444ea4857998a9145d841275d7b277f3046ae961"`
Nov 17 09:30:39.807 INFO running `"docker" "rm" "-f" "fa5cebcb9c3419dac38a4639444ea4857998a9145d841275d7b277f3046ae961"`
Nov 17 09:30:40.072 INFO [stdout] fa5cebcb9c3419dac38a4639444ea4857998a9145d841275d7b277f3046ae961
Nov 17 09:30:40.076 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-6/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-55982/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/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 +2e026d6e5d7621634147ad4c8074f1d964dbb1be-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"`
Nov 17 09:30:40.391 INFO [stdout] 1e653868bf5b49dff02fe55fcc423404befff874b629a093f3d9812bdad87deb
Nov 17 09:30:40.397 INFO running `"docker" "start" "-a" "1e653868bf5b49dff02fe55fcc423404befff874b629a093f3d9812bdad87deb"`
Nov 17 09:30:41.126 INFO [stderr] usermod: no changes
Nov 17 09:30:41.154 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Nov 17 09:30:41.154 INFO [stderr]      Running /target/debug/deps/lifetime_demo-764261b832b2fbcd
Nov 17 09:30:41.157 INFO [stdout] 
Nov 17 09:30:41.157 INFO [stdout] running 0 tests
Nov 17 09:30:41.157 INFO [stdout] 
Nov 17 09:30:41.158 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Nov 17 09:30:41.158 INFO [stdout] 
Nov 17 09:30:41.159 INFO [stderr] su: No module specific data is present
Nov 17 09:30:41.567 INFO running `"docker" "inspect" "1e653868bf5b49dff02fe55fcc423404befff874b629a093f3d9812bdad87deb"`
Nov 17 09:30:41.734 INFO running `"docker" "rm" "-f" "1e653868bf5b49dff02fe55fcc423404befff874b629a093f3d9812bdad87deb"`
Nov 17 09:30:41.803 INFO [stdout] 1e653868bf5b49dff02fe55fcc423404befff874b629a093f3d9812bdad87deb