[INFO] fetching crate backgeard 0.1.0...
[INFO] testing backgeard-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate backgeard 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate backgeard 0.1.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate backgeard 0.1.0
[INFO] finished tweaking crates.io crate backgeard 0.1.0
[INFO] tweaked toml for crates.io crate backgeard 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate backgeard 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tungstenite v0.10.1
[INFO] [stderr]   Downloaded headers v0.3.2
[INFO] [stderr]   Downloaded ryu v1.0.4
[INFO] [stderr]   Downloaded arc-swap v0.4.6
[INFO] [stderr]   Downloaded mime_guess v1.8.8
[INFO] [stderr]   Downloaded multipart v0.16.1
[INFO] [stderr]   Downloaded warp v0.2.3
[INFO] [stderr]   Downloaded miow v0.3.4
[INFO] [stderr]   Downloaded proc-macro2 v1.0.14
[INFO] [stderr]   Downloaded serde_json v1.0.53
[INFO] [stderr]   Downloaded serde v1.0.110
[INFO] [stderr]   Downloaded tokio-tungstenite v0.10.1
[INFO] [stderr]   Downloaded regex v1.3.7
[INFO] [stderr]   Downloaded urlencoding v1.0.0
[INFO] [stderr]   Downloaded hyper v0.13.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f5e9465ea195c3cad4e27860582deffdb85862326334fe2292c30b425390b102
[INFO] running `Command { std: "docker" "start" "-a" "f5e9465ea195c3cad4e27860582deffdb85862326334fe2292c30b425390b102", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5e9465ea195c3cad4e27860582deffdb85862326334fe2292c30b425390b102", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5e9465ea195c3cad4e27860582deffdb85862326334fe2292c30b425390b102", kill_on_drop: false }`
[INFO] [stdout] f5e9465ea195c3cad4e27860582deffdb85862326334fe2292c30b425390b102
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d64a6fa42523a26a4689245fac847edcd73c531bbab6ae755853a1b685fb81fe
[INFO] running `Command { std: "docker" "start" "-a" "d64a6fa42523a26a4689245fac847edcd73c531bbab6ae755853a1b685fb81fe", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.14
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.23
[INFO] [stderr]    Compiling bytes v0.5.4
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling futures-core v0.3.5
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling proc-macro-nested v0.1.4
[INFO] [stderr]    Compiling futures-sink v0.3.5
[INFO] [stderr]    Compiling once_cell v1.4.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.15
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling futures-io v0.3.5
[INFO] [stderr]    Compiling ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling smallvec v1.4.0
[INFO] [stderr]    Compiling arc-swap v0.4.6
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling pin-project-lite v0.1.5
[INFO] [stderr]    Compiling serde v1.0.110
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling ryu v1.0.4
[INFO] [stderr]    Compiling remove_dir_all v0.5.2
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[INFO] [stderr]    Compiling thread_local v1.0.1
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[INFO] [stderr]    Compiling regex v1.3.7
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling phf_codegen v0.7.24
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[INFO] [stderr]    Compiling headers-core v0.2.0
[INFO] [stderr]    Compiling http-body v0.3.1
[INFO] [stderr]    Compiling headers v0.3.2
[INFO] [stderr]    Compiling tungstenite v0.10.1
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling pretty_env_logger v0.4.0
[INFO] [stderr]    Compiling serde_json v1.0.53
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[INFO] [stderr]    Compiling multipart v0.16.1
[INFO] [stderr]    Compiling pin-project-internal v0.4.17
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling tokio v0.2.21
[INFO] [stderr]    Compiling pin-project v0.4.17
[INFO] [stderr]    Compiling futures-util v0.3.5
[INFO] [stderr]    Compiling tokio-util v0.3.1
[INFO] [stderr]    Compiling futures-executor v0.3.5
[INFO] [stderr]    Compiling h2 v0.2.5
[INFO] [stderr]    Compiling futures v0.3.5
[INFO] [stderr]    Compiling tokio-tungstenite v0.10.1
[INFO] [stderr]    Compiling hyper v0.13.5
[INFO] [stderr]    Compiling warp v0.2.3
[INFO] [stderr]    Compiling backgeard v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `child`
[INFO] [stdout]   --> src/main.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     child: Arc<Mutex<Child>>,
[INFO] [stdout]    |     ^^^^^ help: if this is intentional, prefix it with an underscore: `_child`
[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 44.35s
[INFO] running `Command { std: "docker" "inspect" "d64a6fa42523a26a4689245fac847edcd73c531bbab6ae755853a1b685fb81fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d64a6fa42523a26a4689245fac847edcd73c531bbab6ae755853a1b685fb81fe", kill_on_drop: false }`
[INFO] [stdout] d64a6fa42523a26a4689245fac847edcd73c531bbab6ae755853a1b685fb81fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9631939285a6cc3f5c761bb66d63c0bb3c512ac73c9005c0ded95620545f4df0
[INFO] running `Command { std: "docker" "start" "-a" "9631939285a6cc3f5c761bb66d63c0bb3c512ac73c9005c0ded95620545f4df0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling backgeard v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `child`
[INFO] [stdout]   --> src/main.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     child: Arc<Mutex<Child>>,
[INFO] [stdout]    |     ^^^^^ help: if this is intentional, prefix it with an underscore: `_child`
[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 2.38s
[INFO] running `Command { std: "docker" "inspect" "9631939285a6cc3f5c761bb66d63c0bb3c512ac73c9005c0ded95620545f4df0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9631939285a6cc3f5c761bb66d63c0bb3c512ac73c9005c0ded95620545f4df0", kill_on_drop: false }`
[INFO] [stdout] 9631939285a6cc3f5c761bb66d63c0bb3c512ac73c9005c0ded95620545f4df0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5500ada656bf3797242bcf9a95c825a6f25061ade1c0e93d020195c046c1df07
[INFO] running `Command { std: "docker" "start" "-a" "5500ada656bf3797242bcf9a95c825a6f25061ade1c0e93d020195c046c1df07", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused variable: `child`
[INFO] [stderr]   --> src/main.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     child: Arc<Mutex<Child>>,
[INFO] [stderr]    |     ^^^^^ help: if this is intentional, prefix it with an underscore: `_child`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `backgeard` (bin "backgeard" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/backgeard-25ea1a7983812dc5)
[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" "5500ada656bf3797242bcf9a95c825a6f25061ade1c0e93d020195c046c1df07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5500ada656bf3797242bcf9a95c825a6f25061ade1c0e93d020195c046c1df07", kill_on_drop: false }`
[INFO] [stdout] 5500ada656bf3797242bcf9a95c825a6f25061ade1c0e93d020195c046c1df07