[INFO] cloning repository https://github.com/harrydevnull/cassandra-rust-test
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/harrydevnull/cassandra-rust-test" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fharrydevnull%2Fcassandra-rust-test", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fharrydevnull%2Fcassandra-rust-test'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 393ec43dab8fd0c1635447a0b77abf26b7c6240d
[INFO] checking harrydevnull/cassandra-rust-test against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fharrydevnull%2Fcassandra-rust-test" "/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/harrydevnull/cassandra-rust-test on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/harrydevnull/cassandra-rust-test
[INFO] finished tweaking git repo https://github.com/harrydevnull/cassandra-rust-test
[INFO] tweaked toml for git repo https://github.com/harrydevnull/cassandra-rust-test written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/harrydevnull/cassandra-rust-test already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "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] 12703df7a491b34f35a3fa24571a8d895dcffc1309c06068d20f88cdb3dd3d9d
[INFO] running `Command { std: "docker" "start" "-a" "12703df7a491b34f35a3fa24571a8d895dcffc1309c06068d20f88cdb3dd3d9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "12703df7a491b34f35a3fa24571a8d895dcffc1309c06068d20f88cdb3dd3d9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12703df7a491b34f35a3fa24571a8d895dcffc1309c06068d20f88cdb3dd3d9d", kill_on_drop: false }`
[INFO] [stdout] 12703df7a491b34f35a3fa24571a8d895dcffc1309c06068d20f88cdb3dd3d9d
[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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 467d2ec944d255084ada4f0ab099543702e79c153ba2df13d3b2e0f66d81cb9f
[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" "467d2ec944d255084ada4f0ab099543702e79c153ba2df13d3b2e0f66d81cb9f", kill_on_drop: false }`
[INFO] [stderr]     Checking byteorder v0.5.3
[INFO] [stderr]     Checking lazy_static v0.2.2
[INFO] [stderr]     Checking uuid v0.2.3
[INFO] [stderr]     Checking log v0.3.6
[INFO] [stderr]     Checking lz4-compress v0.1.0
[INFO] [stderr]     Checking snap v0.1.2
[INFO] [stderr]     Checking cdrs v0.2.0
[INFO] [stderr]     Checking cassandraaccess v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `response_frame`
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let response_frame = client.start(compression::Compression::Snappy).unwrap();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_response_frame`
[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] [stdout] warning: unused variable: `response_frame`
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let response_frame = client.start(compression::Compression::Snappy).unwrap();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_response_frame`
[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 dev [unoptimized + debuginfo] target(s) in 2.63s
[INFO] running `Command { std: "docker" "inspect" "467d2ec944d255084ada4f0ab099543702e79c153ba2df13d3b2e0f66d81cb9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "467d2ec944d255084ada4f0ab099543702e79c153ba2df13d3b2e0f66d81cb9f", kill_on_drop: false }`
[INFO] [stdout] 467d2ec944d255084ada4f0ab099543702e79c153ba2df13d3b2e0f66d81cb9f