[INFO] cloning repository https://github.com/aviplayer/linked_list_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aviplayer/linked_list_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faviplayer%2Flinked_list_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faviplayer%2Flinked_list_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9b900f4a947ed2af8ce1c6d3cc89efb175ed2ac7
[INFO] testing aviplayer/linked_list_rust against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faviplayer%2Flinked_list_rust" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aviplayer/linked_list_rust on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/aviplayer/linked_list_rust
[INFO] finished tweaking git repo https://github.com/aviplayer/linked_list_rust
[INFO] tweaked toml for git repo https://github.com/aviplayer/linked_list_rust written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/aviplayer/linked_list_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /workspace/builds/worker-3/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "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] 22cae980eecfc4fde4a78a78e2c2048660e4731fcf629c248879e7d244438957
[INFO] running `Command { std: "docker" "start" "-a" "22cae980eecfc4fde4a78a78e2c2048660e4731fcf629c248879e7d244438957", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22cae980eecfc4fde4a78a78e2c2048660e4731fcf629c248879e7d244438957", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22cae980eecfc4fde4a78a78e2c2048660e4731fcf629c248879e7d244438957", kill_on_drop: false }`
[INFO] [stdout] 22cae980eecfc4fde4a78a78e2c2048660e4731fcf629c248879e7d244438957
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8f6d1d9665fa56630106b2246049e83f8bf281c1a0c6557168331c962445683a
[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" "8f6d1d9665fa56630106b2246049e83f8bf281c1a0c6557168331c962445683a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling getrandom v0.2.1
[INFO] [stderr]    Compiling rand_core v0.6.1
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.1
[INFO] [stderr]    Compiling binary_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `Left`
[INFO] [stdout]   --> src/binary.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     Left = 0,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Right`
[INFO] [stdout]   --> src/binary.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     Right = 1,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find1`
[INFO] [stdout]   --> src/binary.rs:95:8
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn find1(node: &mut NodeOption, val: i32) -> Result<&mut NodeOption, Error> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.87s
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8f6d1d9665fa56630106b2246049e83f8bf281c1a0c6557168331c962445683a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f6d1d9665fa56630106b2246049e83f8bf281c1a0c6557168331c962445683a", kill_on_drop: false }`
[INFO] [stdout] 8f6d1d9665fa56630106b2246049e83f8bf281c1a0c6557168331c962445683a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--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] d79324caba1bf1a5cae3c1d315ebb5e3fa5361f15902dabbcbf27e3cb1e0254e
[INFO] running `Command { std: "docker" "start" "-a" "d79324caba1bf1a5cae3c1d315ebb5e3fa5361f15902dabbcbf27e3cb1e0254e", kill_on_drop: false }`
[INFO] [stderr]    Compiling binary_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `Left`
[INFO] [stdout]   --> src/binary.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     Left = 0,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Right`
[INFO] [stdout]   --> src/binary.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     Right = 1,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find1`
[INFO] [stdout]   --> src/binary.rs:95:8
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn find1(node: &mut NodeOption, val: i32) -> Result<&mut NodeOption, Error> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.87s
[INFO] running `Command { std: "docker" "inspect" "d79324caba1bf1a5cae3c1d315ebb5e3fa5361f15902dabbcbf27e3cb1e0254e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d79324caba1bf1a5cae3c1d315ebb5e3fa5361f15902dabbcbf27e3cb1e0254e", kill_on_drop: false }`
[INFO] [stdout] d79324caba1bf1a5cae3c1d315ebb5e3fa5361f15902dabbcbf27e3cb1e0254e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5294fff6961fbcd539f34f85f0ee2c17fbfcee25abac0b51a8e0b4b89f8e6d95
[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" "5294fff6961fbcd539f34f85f0ee2c17fbfcee25abac0b51a8e0b4b89f8e6d95", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: variant is never constructed: `Left`
[INFO] [stdout] running 0 tests
[INFO] [stderr]   --> src/binary.rs:32:5
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stderr] 32 |     Left = 0,
[INFO] [stdout] 
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Right`
[INFO] [stderr]   --> src/binary.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     Right = 1,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `find1`
[INFO] [stderr]   --> src/binary.rs:95:8
[INFO] [stderr]    |
[INFO] [stderr] 95 |     fn find1(node: &mut NodeOption, val: i32) -> Result<&mut NodeOption, Error> {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/binary_tree-1674330198db6ebd
[INFO] running `Command { std: "docker" "inspect" "5294fff6961fbcd539f34f85f0ee2c17fbfcee25abac0b51a8e0b4b89f8e6d95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5294fff6961fbcd539f34f85f0ee2c17fbfcee25abac0b51a8e0b4b89f8e6d95", kill_on_drop: false }`
[INFO] [stdout] 5294fff6961fbcd539f34f85f0ee2c17fbfcee25abac0b51a8e0b4b89f8e6d95