[INFO] fetching crate histogram-sampler 0.5.0...
[INFO] testing histogram-sampler-0.5.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate histogram-sampler 0.5.0 into /workspace/builds/worker-50/source
[INFO] validating manifest of crates.io crate histogram-sampler 0.5.0 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 histogram-sampler 0.5.0
[INFO] finished tweaking crates.io crate histogram-sampler 0.5.0
[INFO] tweaked toml for crates.io crate histogram-sampler 0.5.0 written to /workspace/builds/worker-50/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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] 3a2f0b85a4f2e4aa4867d5ef553df550ad535a6b87bdb7a40afcb29a2fc9eb06
[INFO] running `Command { std: "docker" "start" "-a" "3a2f0b85a4f2e4aa4867d5ef553df550ad535a6b87bdb7a40afcb29a2fc9eb06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a2f0b85a4f2e4aa4867d5ef553df550ad535a6b87bdb7a40afcb29a2fc9eb06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a2f0b85a4f2e4aa4867d5ef553df550ad535a6b87bdb7a40afcb29a2fc9eb06", kill_on_drop: false }`
[INFO] [stdout] 3a2f0b85a4f2e4aa4867d5ef553df550ad535a6b87bdb7a40afcb29a2fc9eb06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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] b3fa3da4cd1352f0a8bbf6346e02cf79f4372b9ab56f1a98eca021a10dad6a46
[INFO] running `Command { std: "docker" "start" "-a" "b3fa3da4cd1352f0a8bbf6346e02cf79f4372b9ab56f1a98eca021a10dad6a46", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling getrandom v0.2.5
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling histogram-sampler v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.60s
[INFO] running `Command { std: "docker" "inspect" "b3fa3da4cd1352f0a8bbf6346e02cf79f4372b9ab56f1a98eca021a10dad6a46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3fa3da4cd1352f0a8bbf6346e02cf79f4372b9ab56f1a98eca021a10dad6a46", kill_on_drop: false }`
[INFO] [stdout] b3fa3da4cd1352f0a8bbf6346e02cf79f4372b9ab56f1a98eca021a10dad6a46
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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] 4e85bf7c3d926ca2e997ad6c71673cb1d9c5440a7c5761c4fa9527bbb5e6d9b1
[INFO] running `Command { std: "docker" "start" "-a" "4e85bf7c3d926ca2e997ad6c71673cb1d9c5440a7c5761c4fa9527bbb5e6d9b1", kill_on_drop: false }`
[INFO] [stderr]    Compiling histogram-sampler v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.51s
[INFO] running `Command { std: "docker" "inspect" "4e85bf7c3d926ca2e997ad6c71673cb1d9c5440a7c5761c4fa9527bbb5e6d9b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e85bf7c3d926ca2e997ad6c71673cb1d9c5440a7c5761c4fa9527bbb5e6d9b1", kill_on_drop: false }`
[INFO] [stdout] 4e85bf7c3d926ca2e997ad6c71673cb1d9c5440a7c5761c4fa9527bbb5e6d9b1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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] e59085353d6024e62ac76bccb0b032671d41c60fda15d13c0ec793a2b3af6c92
[INFO] running `Command { std: "docker" "start" "-a" "e59085353d6024e62ac76bccb0b032671d41c60fda15d13c0ec793a2b3af6c92", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/histogram_sampler-94a789e9ec409d0c)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.31s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests histogram-sampler
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 39) ... ok
[INFO] [stdout] test src/lib.rs - Sampler (line 97) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.94s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e59085353d6024e62ac76bccb0b032671d41c60fda15d13c0ec793a2b3af6c92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e59085353d6024e62ac76bccb0b032671d41c60fda15d13c0ec793a2b3af6c92", kill_on_drop: false }`
[INFO] [stdout] e59085353d6024e62ac76bccb0b032671d41c60fda15d13c0ec793a2b3af6c92