[INFO] fetching crate samplers 0.1.3...
[INFO] testing samplers-0.1.3 against 1.59.0 for beta-1.60-1
[INFO] extracting crate samplers 0.1.3 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate samplers 0.1.3 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate samplers 0.1.3
[INFO] finished tweaking crates.io crate samplers 0.1.3
[INFO] tweaked toml for crates.io crate samplers 0.1.3 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate crates.io crate samplers 0.1.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--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-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c961223560584e0c025a90e9aa25b9a72128e1299a40c9ee195951331844593b
[INFO] running `Command { std: "docker" "start" "-a" "c961223560584e0c025a90e9aa25b9a72128e1299a40c9ee195951331844593b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c961223560584e0c025a90e9aa25b9a72128e1299a40c9ee195951331844593b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c961223560584e0c025a90e9aa25b9a72128e1299a40c9ee195951331844593b", kill_on_drop: false }`
[INFO] [stdout] c961223560584e0c025a90e9aa25b9a72128e1299a40c9ee195951331844593b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e4a25dbbd24b0d527fb696cd7577a19623b981106c05fb67d7023cee9fc27ef2
[INFO] running `Command { std: "docker" "start" "-a" "e4a25dbbd24b0d527fb696cd7577a19623b981106c05fb67d7023cee9fc27ef2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling failure_derive v0.1.7
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling backtrace-sys v0.1.33
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling backtrace v0.3.45
[INFO] [stderr]    Compiling rand_distr v0.2.2
[INFO] [stderr]    Compiling statrs v0.12.0
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling failure v0.1.7
[INFO] [stderr]    Compiling samplers v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.53s
[INFO] running `Command { std: "docker" "inspect" "e4a25dbbd24b0d527fb696cd7577a19623b981106c05fb67d7023cee9fc27ef2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4a25dbbd24b0d527fb696cd7577a19623b981106c05fb67d7023cee9fc27ef2", kill_on_drop: false }`
[INFO] [stdout] e4a25dbbd24b0d527fb696cd7577a19623b981106c05fb67d7023cee9fc27ef2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 390137b3cd3620f52bc601151bb52e3b531d2d72aca012502ce1e0320272897c
[INFO] running `Command { std: "docker" "start" "-a" "390137b3cd3620f52bc601151bb52e3b531d2d72aca012502ce1e0320272897c", kill_on_drop: false }`
[INFO] [stderr]    Compiling samplers v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.26s
[INFO] running `Command { std: "docker" "inspect" "390137b3cd3620f52bc601151bb52e3b531d2d72aca012502ce1e0320272897c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "390137b3cd3620f52bc601151bb52e3b531d2d72aca012502ce1e0320272897c", kill_on_drop: false }`
[INFO] [stdout] 390137b3cd3620f52bc601151bb52e3b531d2d72aca012502ce1e0320272897c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4bee9005ca333475d9e416724cfa911942216bb1f9115c9dd3a7c5671f09e2cd
[INFO] running `Command { std: "docker" "start" "-a" "4bee9005ca333475d9e416724cfa911942216bb1f9115c9dd3a7c5671f09e2cd", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/samplers-bb4cca96d2004f48)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test histogram::test_histogram ... ok
[INFO] [stdout] test histogram::test_linspace ... ok
[INFO] [stdout] test summary::test_central_moments_summary ... ok
[INFO] [stdout] test summary::test_distribution_summary ... ok
[INFO] [stdout] test summary::test_mean ... ok
[INFO] [stdout] test summary::test_variance ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4bee9005ca333475d9e416724cfa911942216bb1f9115c9dd3a7c5671f09e2cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4bee9005ca333475d9e416724cfa911942216bb1f9115c9dd3a7c5671f09e2cd", kill_on_drop: false }`
[INFO] [stdout] 4bee9005ca333475d9e416724cfa911942216bb1f9115c9dd3a7c5671f09e2cd