[INFO] cloning repository https://github.com/kevinclark/rsearch
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kevinclark/rsearch" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkevinclark%2Frsearch", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkevinclark%2Frsearch'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 369c4569bd35d5c6e4caf4406becd8f01cc35b65
[INFO] checking kevinclark/rsearch against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkevinclark%2Frsearch" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kevinclark/rsearch on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kevinclark/rsearch
[INFO] finished tweaking git repo https://github.com/kevinclark/rsearch
[INFO] tweaked toml for git repo https://github.com/kevinclark/rsearch written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/kevinclark/rsearch already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "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] ebcfd51f576808d6a74fcdf1ae9a2a7cc5c900d6c7008de57c7e151f6af7ff94
[INFO] running `Command { std: "docker" "start" "-a" "ebcfd51f576808d6a74fcdf1ae9a2a7cc5c900d6c7008de57c7e151f6af7ff94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ebcfd51f576808d6a74fcdf1ae9a2a7cc5c900d6c7008de57c7e151f6af7ff94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebcfd51f576808d6a74fcdf1ae9a2a7cc5c900d6c7008de57c7e151f6af7ff94", kill_on_drop: false }`
[INFO] [stdout] ebcfd51f576808d6a74fcdf1ae9a2a7cc5c900d6c7008de57c7e151f6af7ff94
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--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] 6f1584998415f16aaa77962860ffaf274c4f6d2243015acc036259655ab68b68
[INFO] running `Command { std: "docker" "start" "-a" "6f1584998415f16aaa77962860ffaf274c4f6d2243015acc036259655ab68b68", kill_on_drop: false }`
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]    Compiling snafu-derive v0.6.8
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking charset v0.1.2
[INFO] [stderr]     Checking mailparse v0.12.0
[INFO] [stderr]     Checking snafu v0.6.8
[INFO] [stderr]     Checking rsearch v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `read_u8`
[INFO] [stdout]   --> src/lib.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn read_u8(reader: &mut impl io::BufRead) -> Result<u8, io::Error>
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_u8`
[INFO] [stdout]   --> src/lib.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn read_u8(reader: &mut impl io::BufRead) -> Result<u8, io::Error>
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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 16.91s
[INFO] running `Command { std: "docker" "inspect" "6f1584998415f16aaa77962860ffaf274c4f6d2243015acc036259655ab68b68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f1584998415f16aaa77962860ffaf274c4f6d2243015acc036259655ab68b68", kill_on_drop: false }`
[INFO] [stdout] 6f1584998415f16aaa77962860ffaf274c4f6d2243015acc036259655ab68b68