[INFO] cloning repository https://github.com/itsmoirob/rust_tut
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/itsmoirob/rust_tut" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fitsmoirob%2Frust_tut", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fitsmoirob%2Frust_tut'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f95afffd446a8890948b74cbc2e983854b6d192
[INFO] testing itsmoirob/rust_tut against try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fitsmoirob%2Frust_tut" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/itsmoirob/rust_tut on toolchain ecabaf78506b7a4668d42dc20268c086b93f0fad
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/itsmoirob/rust_tut
[INFO] finished tweaking git repo https://github.com/itsmoirob/rust_tut
[INFO] tweaked toml for git repo https://github.com/itsmoirob/rust_tut written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/itsmoirob/rust_tut already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 49e5acda6457f23c3466a63e4e4f9ce13dcb5abde85092a2dc41e60d5434ab82
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "49e5acda6457f23c3466a63e4e4f9ce13dcb5abde85092a2dc41e60d5434ab82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "49e5acda6457f23c3466a63e4e4f9ce13dcb5abde85092a2dc41e60d5434ab82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49e5acda6457f23c3466a63e4e4f9ce13dcb5abde85092a2dc41e60d5434ab82", kill_on_drop: false }`
[INFO] [stdout] 49e5acda6457f23c3466a63e4e4f9ce13dcb5abde85092a2dc41e60d5434ab82
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 445c3f4605e935920565b65c53564f13f4e1ebd6e3751666a473c18db450dd22
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "445c3f4605e935920565b65c53564f13f4e1ebd6e3751666a473c18db450dd22", kill_on_drop: false }`
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling instant v0.1.9
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling lock_api v0.4.4
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling tut v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `reference_counted`
[INFO] [stdout]   --> src/main.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |     let reference_counted = Arc::new(employee_arc_lock);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reference_counted`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `employee_mutable`
[INFO] [stdout]   --> src/main.rs:93:13
[INFO] [stdout]    |
[INFO] [stdout] 93 |     let mut employee_mutable = Employee::new(String::from("Arthur_emutable"), 500);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_employee_mutable`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:93:9
[INFO] [stdout]    |
[INFO] [stdout] 93 |     let mut employee_mutable = Employee::new(String::from("Arthur_emutable"), 500);
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `use_ided_impl`
[INFO] [stdout]   --> src/employee.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn use_ided_impl(x: impl Ided) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `use_ided_dyn`
[INFO] [stdout]   --> src/employee.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn use_ided_dyn(x: Box<dyn Ided>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.27s
[INFO] running `Command { std: "docker" "inspect" "445c3f4605e935920565b65c53564f13f4e1ebd6e3751666a473c18db450dd22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "445c3f4605e935920565b65c53564f13f4e1ebd6e3751666a473c18db450dd22", kill_on_drop: false }`
[INFO] [stdout] 445c3f4605e935920565b65c53564f13f4e1ebd6e3751666a473c18db450dd22
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 94ace699d47175b92ec5ddfbab2a934683db401765c458f874d266e1db065e60
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "94ace699d47175b92ec5ddfbab2a934683db401765c458f874d266e1db065e60", kill_on_drop: false }`
[INFO] [stderr]    Compiling tut v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `reference_counted`
[INFO] [stdout]   --> src/main.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |     let reference_counted = Arc::new(employee_arc_lock);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reference_counted`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `employee_mutable`
[INFO] [stdout]   --> src/main.rs:93:13
[INFO] [stdout]    |
[INFO] [stdout] 93 |     let mut employee_mutable = Employee::new(String::from("Arthur_emutable"), 500);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_employee_mutable`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:93:9
[INFO] [stdout]    |
[INFO] [stdout] 93 |     let mut employee_mutable = Employee::new(String::from("Arthur_emutable"), 500);
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `use_ided_impl`
[INFO] [stdout]   --> src/employee.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn use_ided_impl(x: impl Ided) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `use_ided_dyn`
[INFO] [stdout]   --> src/employee.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn use_ided_dyn(x: Box<dyn Ided>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.94s
[INFO] running `Command { std: "docker" "inspect" "94ace699d47175b92ec5ddfbab2a934683db401765c458f874d266e1db065e60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94ace699d47175b92ec5ddfbab2a934683db401765c458f874d266e1db065e60", kill_on_drop: false }`
[INFO] [stdout] 94ace699d47175b92ec5ddfbab2a934683db401765c458f874d266e1db065e60
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c2e3da0428b825e433b599ef2fb71f5f06e854cfe1f161767d08afe573f049e0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c2e3da0428b825e433b599ef2fb71f5f06e854cfe1f161767d08afe573f049e0", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `reference_counted`
[INFO] [stderr]   --> src/main.rs:89:9
[INFO] [stderr]    |
[INFO] [stderr] 89 |     let reference_counted = Arc::new(employee_arc_lock);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reference_counted`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `employee_mutable`
[INFO] [stderr]   --> src/main.rs:93:13
[INFO] [stderr]    |
[INFO] [stderr] 93 |     let mut employee_mutable = Employee::new(String::from("Arthur_emutable"), 500);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_employee_mutable`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:93:9
[INFO] [stderr]    |
[INFO] [stderr] 93 |     let mut employee_mutable = Employee::new(String::from("Arthur_emutable"), 500);
[INFO] [stderr]    |         ----^^^^^^^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `use_ided_impl`
[INFO] [stderr]   --> src/employee.rs:44:4
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn use_ided_impl(x: impl Ided) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `use_ided_dyn`
[INFO] [stderr]   --> src/employee.rs:49:4
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn use_ided_dyn(x: Box<dyn Ided>) {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/tut-9f9c366f7df82461)
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/tut-6d852cc02e06893e)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests tut
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c2e3da0428b825e433b599ef2fb71f5f06e854cfe1f161767d08afe573f049e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2e3da0428b825e433b599ef2fb71f5f06e854cfe1f161767d08afe573f049e0", kill_on_drop: false }`
[INFO] [stdout] c2e3da0428b825e433b599ef2fb71f5f06e854cfe1f161767d08afe573f049e0