[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-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fameernormie%2Frust_lang_concepts" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ameernormie/rust_lang_concepts on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-11/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-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] fa8744de0169ea3d45e9ee3a8a77c4f1db874d8782e79d170fe551f6fa6c3a13
[INFO] running `Command { std: "docker" "start" "-a" "fa8744de0169ea3d45e9ee3a8a77c4f1db874d8782e79d170fe551f6fa6c3a13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa8744de0169ea3d45e9ee3a8a77c4f1db874d8782e79d170fe551f6fa6c3a13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa8744de0169ea3d45e9ee3a8a77c4f1db874d8782e79d170fe551f6fa6c3a13", kill_on_drop: false }`
[INFO] [stdout] fa8744de0169ea3d45e9ee3a8a77c4f1db874d8782e79d170fe551f6fa6c3a13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ee26835f11f21c74f623eea5fd9b5eb65dbcb2f6ff9ac23f6f80f3b4f0839927
[INFO] running `Command { std: "docker" "start" "-a" "ee26835f11f21c74f623eea5fd9b5eb65dbcb2f6ff9ac23f6f80f3b4f0839927", kill_on_drop: false }`
[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 2.73s
[INFO] running `Command { std: "docker" "inspect" "ee26835f11f21c74f623eea5fd9b5eb65dbcb2f6ff9ac23f6f80f3b4f0839927", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee26835f11f21c74f623eea5fd9b5eb65dbcb2f6ff9ac23f6f80f3b4f0839927", kill_on_drop: false }`
[INFO] [stdout] ee26835f11f21c74f623eea5fd9b5eb65dbcb2f6ff9ac23f6f80f3b4f0839927
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7303c56aff0c23d5276639afff5ad32b5629c2cc89f1caf02ae14ae678475355
[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" "7303c56aff0c23d5276639afff5ad32b5629c2cc89f1caf02ae14ae678475355", 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 1.58s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_lang_concepts-4a1b4a3512f43a1e)
[INFO] running `Command { std: "docker" "inspect" "7303c56aff0c23d5276639afff5ad32b5629c2cc89f1caf02ae14ae678475355", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7303c56aff0c23d5276639afff5ad32b5629c2cc89f1caf02ae14ae678475355", kill_on_drop: false }`
[INFO] [stdout] 7303c56aff0c23d5276639afff5ad32b5629c2cc89f1caf02ae14ae678475355
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] dd3f0a21d7c966cae8e25daa4893792847cb4fbd253aa8613542fa11a6a47a53
[INFO] running `Command { std: "docker" "start" "-a" "dd3f0a21d7c966cae8e25daa4893792847cb4fbd253aa8613542fa11a6a47a53", 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 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_lang_concepts-4a1b4a3512f43a1e)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test smart_pointers::tests::it_sends_an_over_75_percent_warning_message ... ok
[INFO] [stdout] test iterators::counter_next_method ... 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" "dd3f0a21d7c966cae8e25daa4893792847cb4fbd253aa8613542fa11a6a47a53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd3f0a21d7c966cae8e25daa4893792847cb4fbd253aa8613542fa11a6a47a53", kill_on_drop: false }`
[INFO] [stdout] dd3f0a21d7c966cae8e25daa4893792847cb4fbd253aa8613542fa11a6a47a53