[INFO] cloning repository https://github.com/ameernormie/rust_lang_concepts
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ameernormie/rust_lang_concepts" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fameernormie%2Frust_lang_concepts", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fameernormie%2Frust_lang_concepts'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 52dff83aa55dc7b9d9fd4db48c90582247359856
[INFO] testing ameernormie/rust_lang_concepts against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fameernormie%2Frust_lang_concepts" "/workspace/builds/worker-22/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-22/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ameernormie/rust_lang_concepts on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ameernormie/rust_lang_concepts
[INFO] finished tweaking git repo https://github.com/ameernormie/rust_lang_concepts
[INFO] tweaked toml for git repo https://github.com/ameernormie/rust_lang_concepts written to /workspace/builds/worker-22/source/Cargo.toml
[INFO] crate git repo https://github.com/ameernormie/rust_lang_concepts already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 82ca0c360dbeefbd42e6d237fc85e2d5e42a34034524620d884a05288d8795e3
[INFO] running `Command { std: "docker" "start" "-a" "82ca0c360dbeefbd42e6d237fc85e2d5e42a34034524620d884a05288d8795e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "82ca0c360dbeefbd42e6d237fc85e2d5e42a34034524620d884a05288d8795e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82ca0c360dbeefbd42e6d237fc85e2d5e42a34034524620d884a05288d8795e3", kill_on_drop: false }`
[INFO] [stdout] 82ca0c360dbeefbd42e6d237fc85e2d5e42a34034524620d884a05288d8795e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 577cab0dc97d62ffc22a6cb9cc46b1a7835ca716464828f3b3597084ef7813e1
[INFO] running `Command { std: "docker" "start" "-a" "577cab0dc97d62ffc22a6cb9cc46b1a7835ca716464828f3b3597084ef7813e1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust_lang_concepts v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `LimitTracker`
[INFO] [stdout]   --> src/smart_pointers.rs:73:12
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub struct LimitTracker<'a, T: Messenger> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/smart_pointers.rs:83:12
[INFO] [stdout]    |
[INFO] [stdout] 83 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_value`
[INFO] [stdout]   --> src/smart_pointers.rs:91:12
[INFO] [stdout]    |
[INFO] [stdout] 91 |     pub fn set_value(&mut self, value: usize) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.15s
[INFO] running `Command { std: "docker" "inspect" "577cab0dc97d62ffc22a6cb9cc46b1a7835ca716464828f3b3597084ef7813e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "577cab0dc97d62ffc22a6cb9cc46b1a7835ca716464828f3b3597084ef7813e1", kill_on_drop: false }`
[INFO] [stdout] 577cab0dc97d62ffc22a6cb9cc46b1a7835ca716464828f3b3597084ef7813e1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 748a4fd6960caeec09d0907f2677023f6bbebb23fd1212650751eff2418d13f9
[INFO] running `Command { std: "docker" "start" "-a" "748a4fd6960caeec09d0907f2677023f6bbebb23fd1212650751eff2418d13f9", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_lang_concepts v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `v1`
[INFO] [stdout]   --> src/closures.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |     let v1 = c.value(1);
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_v1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "748a4fd6960caeec09d0907f2677023f6bbebb23fd1212650751eff2418d13f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "748a4fd6960caeec09d0907f2677023f6bbebb23fd1212650751eff2418d13f9", kill_on_drop: false }`
[INFO] [stdout] 748a4fd6960caeec09d0907f2677023f6bbebb23fd1212650751eff2418d13f9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f8b3a41ef8a1a101c01d76b812fc07043b26d94a0d7b2df609c7026e4eb6ddf6
[INFO] running `Command { std: "docker" "start" "-a" "f8b3a41ef8a1a101c01d76b812fc07043b26d94a0d7b2df609c7026e4eb6ddf6", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `v1`
[INFO] [stderr]   --> src/closures.rs:90:9
[INFO] [stderr]    |
[INFO] [stderr] 90 |     let v1 = c.value(1);
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_v1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_lang_concepts` (bin "rust_lang_concepts" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_lang_concepts-4a1b4a3512f43a1e)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test iterators::counter_next_method ... ok
[INFO] [stdout] test smart_pointers::tests::it_sends_an_over_75_percent_warning_message ... ok
[INFO] [stdout] test closures::call_cacher_with_different_values ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f8b3a41ef8a1a101c01d76b812fc07043b26d94a0d7b2df609c7026e4eb6ddf6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8b3a41ef8a1a101c01d76b812fc07043b26d94a0d7b2df609c7026e4eb6ddf6", kill_on_drop: false }`
[INFO] [stdout] f8b3a41ef8a1a101c01d76b812fc07043b26d94a0d7b2df609c7026e4eb6ddf6