[INFO] cloning repository https://github.com/KermitPurple/rust_data_structures
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/KermitPurple/rust_data_structures" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKermitPurple%2Frust_data_structures", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKermitPurple%2Frust_data_structures'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5be314feed32418ba84db0e5602462e7d2aeaf6b
[INFO] testing KermitPurple/rust_data_structures 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%2FKermitPurple%2Frust_data_structures" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/KermitPurple/rust_data_structures 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/KermitPurple/rust_data_structures
[INFO] finished tweaking git repo https://github.com/KermitPurple/rust_data_structures
[INFO] tweaked toml for git repo https://github.com/KermitPurple/rust_data_structures written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/KermitPurple/rust_data_structures 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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] ddb843a21356cbf66a54569a9c7495cb2c9984525a31bba916054498fe3d49e2
[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" "ddb843a21356cbf66a54569a9c7495cb2c9984525a31bba916054498fe3d49e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ddb843a21356cbf66a54569a9c7495cb2c9984525a31bba916054498fe3d49e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddb843a21356cbf66a54569a9c7495cb2c9984525a31bba916054498fe3d49e2", kill_on_drop: false }`
[INFO] [stdout] ddb843a21356cbf66a54569a9c7495cb2c9984525a31bba916054498fe3d49e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 1e5d39bb5405fa1682f6b58d878fe829b15af07ffcbc4d2362d9f790667987fd
[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" "1e5d39bb5405fa1682f6b58d878fe829b15af07ffcbc4d2362d9f790667987fd", kill_on_drop: false }`
[INFO] [stderr]    Compiling data_structures v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]   --> src/stack.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn len(&self) -> usize {
[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: `is_empty`
[INFO] [stdout]   --> src/queue.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]   --> src/dynamic_array.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_empty`
[INFO] [stdout]   --> src/dynamic_array.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.25s
[INFO] running `Command { std: "docker" "inspect" "1e5d39bb5405fa1682f6b58d878fe829b15af07ffcbc4d2362d9f790667987fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e5d39bb5405fa1682f6b58d878fe829b15af07ffcbc4d2362d9f790667987fd", kill_on_drop: false }`
[INFO] [stdout] 1e5d39bb5405fa1682f6b58d878fe829b15af07ffcbc4d2362d9f790667987fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 97c3f945f97ff87a20a177332615adf19aecc2427bcd1819c0936b2f01257809
[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" "97c3f945f97ff87a20a177332615adf19aecc2427bcd1819c0936b2f01257809", kill_on_drop: false }`
[INFO] [stderr]    Compiling data_structures v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]   --> src/stack.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn len(&self) -> usize {
[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: `is_empty`
[INFO] [stdout]   --> src/queue.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]   --> src/dynamic_array.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_empty`
[INFO] [stdout]   --> src/dynamic_array.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `Command { std: "docker" "inspect" "97c3f945f97ff87a20a177332615adf19aecc2427bcd1819c0936b2f01257809", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97c3f945f97ff87a20a177332615adf19aecc2427bcd1819c0936b2f01257809", kill_on_drop: false }`
[INFO] [stdout] 97c3f945f97ff87a20a177332615adf19aecc2427bcd1819c0936b2f01257809
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3d180615b832a07320d490e34be2f4e9fb01bc8fbffe4504d723cdd37497157b
[INFO] running `Command { std: "docker" "start" "-a" "3d180615b832a07320d490e34be2f4e9fb01bc8fbffe4504d723cdd37497157b", kill_on_drop: false }`
[INFO] [stderr] warning: associated function is never used: `len`
[INFO] [stderr]   --> src/stack.rs:22:12
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn len(&self) -> usize {
[INFO] [stderr]    |            ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_empty`
[INFO] [stderr]   --> src/queue.rs:22:12
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn is_empty(&self) -> bool {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `len`
[INFO] [stderr]   --> src/dynamic_array.rs:44:12
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn len(&self) -> usize {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_empty`
[INFO] [stderr]   --> src/dynamic_array.rs:48:12
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn is_empty(&self) -> bool {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `data_structures` (bin "data_structures" test) generated 4 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/data_structures-b29ff9bc30571fed)
[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" "3d180615b832a07320d490e34be2f4e9fb01bc8fbffe4504d723cdd37497157b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d180615b832a07320d490e34be2f4e9fb01bc8fbffe4504d723cdd37497157b", kill_on_drop: false }`
[INFO] [stdout] 3d180615b832a07320d490e34be2f4e9fb01bc8fbffe4504d723cdd37497157b