[INFO] cloning repository https://github.com/toasterbag/rr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/toasterbag/rr" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoasterbag%2Frr", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoasterbag%2Frr'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 55fb9f2ebcf96ede29543b5e1e4576a733430e86
[INFO] testing toasterbag/rr against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoasterbag%2Frr" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/toasterbag/rr 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/toasterbag/rr
[INFO] finished tweaking git repo https://github.com/toasterbag/rr
[INFO] tweaked toml for git repo https://github.com/toasterbag/rr written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/toasterbag/rr 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stdout] e3c9765a11451ce12bc4aa96b56c23cace72d3c6348d3a0bbdc0b3160814c18d
[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" "e3c9765a11451ce12bc4aa96b56c23cace72d3c6348d3a0bbdc0b3160814c18d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3c9765a11451ce12bc4aa96b56c23cace72d3c6348d3a0bbdc0b3160814c18d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3c9765a11451ce12bc4aa96b56c23cace72d3c6348d3a0bbdc0b3160814c18d", kill_on_drop: false }`
[INFO] [stdout] e3c9765a11451ce12bc4aa96b56c23cace72d3c6348d3a0bbdc0b3160814c18d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 11f20112f26c580d94a69678299178635531115689a47986f72f27ba1fb7c4bb
[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" "11f20112f26c580d94a69678299178635531115689a47986f72f27ba1fb7c4bb", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]    Compiling futures-io v0.3.5
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling argh_shared v0.1.1
[INFO] [stderr]    Compiling scoped-tls-hkt v0.1.2
[INFO] [stderr]    Compiling async-task v3.0.0
[INFO] [stderr]    Compiling futures-task v0.3.5
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling socket2 v0.3.12
[INFO] [stderr]    Compiling crossbeam-queue v0.2.2
[INFO] [stderr]    Compiling kv-log-macro v1.0.6
[INFO] [stderr]    Compiling pin-project-internal v0.4.20
[INFO] [stderr]    Compiling argh_derive v0.1.1
[INFO] [stderr]    Compiling argh v0.1.3
[INFO] [stderr]    Compiling pin-project v0.4.20
[INFO] [stderr]    Compiling futures-util v0.3.5
[INFO] [stderr]    Compiling piper v0.1.3
[INFO] [stderr]    Compiling smol v0.1.11
[INFO] [stderr]    Compiling async-std v1.6.0
[INFO] [stderr]    Compiling rr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `handle`
[INFO] [stdout]   --> src/main.rs:70:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |     let handle = thread::spawn(move || {
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_handle`
[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 53.13s
[INFO] running `Command { std: "docker" "inspect" "11f20112f26c580d94a69678299178635531115689a47986f72f27ba1fb7c4bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11f20112f26c580d94a69678299178635531115689a47986f72f27ba1fb7c4bb", kill_on_drop: false }`
[INFO] [stdout] 11f20112f26c580d94a69678299178635531115689a47986f72f27ba1fb7c4bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stdout] 41ce108400590ad7f79be53f50bd752905d08039b29440af2eb40f3acb15aecf
[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" "41ce108400590ad7f79be53f50bd752905d08039b29440af2eb40f3acb15aecf", kill_on_drop: false }`
[INFO] [stderr]    Compiling rr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `handle`
[INFO] [stdout]   --> src/main.rs:70:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |     let handle = thread::spawn(move || {
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_handle`
[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 1.17s
[INFO] running `Command { std: "docker" "inspect" "41ce108400590ad7f79be53f50bd752905d08039b29440af2eb40f3acb15aecf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41ce108400590ad7f79be53f50bd752905d08039b29440af2eb40f3acb15aecf", kill_on_drop: false }`
[INFO] [stdout] 41ce108400590ad7f79be53f50bd752905d08039b29440af2eb40f3acb15aecf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] d74f4c8615b2b6219fa4c9a7ece3bdfc741fb903d0373855d6d818dbf19fc6ec
[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" "d74f4c8615b2b6219fa4c9a7ece3bdfc741fb903d0373855d6d818dbf19fc6ec", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `handle`
[INFO] [stderr]   --> src/main.rs:70:9
[INFO] [stderr]    |
[INFO] [stderr] 70 |     let handle = thread::spawn(move || {
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_handle`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.16s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rr-ca5a1d04d078a027
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d74f4c8615b2b6219fa4c9a7ece3bdfc741fb903d0373855d6d818dbf19fc6ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d74f4c8615b2b6219fa4c9a7ece3bdfc741fb903d0373855d6d818dbf19fc6ec", kill_on_drop: false }`
[INFO] [stdout] d74f4c8615b2b6219fa4c9a7ece3bdfc741fb903d0373855d6d818dbf19fc6ec