[INFO] cloning repository https://github.com/mingyli/samplers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mingyli/samplers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Fsamplers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Fsamplers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] df6b3eef7466f44f22799cf9e7cf63698cf7e68a
[INFO] testing mingyli/samplers against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Fsamplers" "/workspace/builds/worker-57/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-57/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mingyli/samplers on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mingyli/samplers
[INFO] finished tweaking git repo https://github.com/mingyli/samplers
[INFO] tweaked toml for git repo https://github.com/mingyli/samplers written to /workspace/builds/worker-57/source/Cargo.toml
[INFO] crate git repo https://github.com/mingyli/samplers already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/rust-random/rand`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 70ccbe44c871cad7103a464617954d26e97dfa7162d364392264570382f84580
[INFO] running `Command { std: "docker" "start" "-a" "70ccbe44c871cad7103a464617954d26e97dfa7162d364392264570382f84580", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "70ccbe44c871cad7103a464617954d26e97dfa7162d364392264570382f84580", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70ccbe44c871cad7103a464617954d26e97dfa7162d364392264570382f84580", kill_on_drop: false }`
[INFO] [stdout] 70ccbe44c871cad7103a464617954d26e97dfa7162d364392264570382f84580
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3f1d2c5b781c9096cd40cfb637360dd41e451e3f5affbdfa36fc048dc8677e70
[INFO] running `Command { std: "docker" "start" "-a" "3f1d2c5b781c9096cd40cfb637360dd41e451e3f5affbdfa36fc048dc8677e70", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling failure_derive v0.1.7
[INFO] [stderr]    Compiling unicode-width v0.1.7
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.33
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling backtrace v0.3.45
[INFO] [stderr]    Compiling rand_core v0.5.1 (https://github.com/rust-random/rand#2bb85945)
[INFO] [stderr]    Compiling rand_chacha v0.2.2 (https://github.com/rust-random/rand#2bb85945)
[INFO] [stderr]    Compiling rand v0.7.3 (https://github.com/rust-random/rand#2bb85945)
[INFO] [stderr]    Compiling rand_distr v0.2.2 (https://github.com/rust-random/rand#2bb85945)
[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 22.29s
[INFO] running `Command { std: "docker" "inspect" "3f1d2c5b781c9096cd40cfb637360dd41e451e3f5affbdfa36fc048dc8677e70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f1d2c5b781c9096cd40cfb637360dd41e451e3f5affbdfa36fc048dc8677e70", kill_on_drop: false }`
[INFO] [stdout] 3f1d2c5b781c9096cd40cfb637360dd41e451e3f5affbdfa36fc048dc8677e70
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5d706a35526f517b457f0e18c60288fc1f0b3be23e3cb79c3143cd3a317b57b6
[INFO] running `Command { std: "docker" "start" "-a" "5d706a35526f517b457f0e18c60288fc1f0b3be23e3cb79c3143cd3a317b57b6", kill_on_drop: false }`
[INFO] [stderr]    Compiling samplers v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.11s
[INFO] running `Command { std: "docker" "inspect" "5d706a35526f517b457f0e18c60288fc1f0b3be23e3cb79c3143cd3a317b57b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d706a35526f517b457f0e18c60288fc1f0b3be23e3cb79c3143cd3a317b57b6", kill_on_drop: false }`
[INFO] [stdout] 5d706a35526f517b457f0e18c60288fc1f0b3be23e3cb79c3143cd3a317b57b6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7a84e4d1b77feb8b1bd6d71d4427ccd47ca756f91f22666599d1d5bfa6e69bf3
[INFO] running `Command { std: "docker" "start" "-a" "7a84e4d1b77feb8b1bd6d71d4427ccd47ca756f91f22666599d1d5bfa6e69bf3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 5.36s
[INFO] [stdout] running 6 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/samplers-131bba06d95a9c85)
[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_variance ... ok
[INFO] [stdout] test summary::test_mean ... ok
[INFO] [stdout] test summary::test_distribution_summary ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7a84e4d1b77feb8b1bd6d71d4427ccd47ca756f91f22666599d1d5bfa6e69bf3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a84e4d1b77feb8b1bd6d71d4427ccd47ca756f91f22666599d1d5bfa6e69bf3", kill_on_drop: false }`
[INFO] [stdout] 7a84e4d1b77feb8b1bd6d71d4427ccd47ca756f91f22666599d1d5bfa6e69bf3