[INFO] fetching crate histogram-sampler 0.5.0...
[INFO] testing histogram-sampler-0.5.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate histogram-sampler 0.5.0 into /workspace/builds/worker-28/source
[INFO] validating manifest of crates.io crate histogram-sampler 0.5.0 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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-28/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 04e2d6b51f337663ae86e02fea4062698d7cec65e9589e2e439b9b5d8c5e1824
[INFO] running `Command { std: "docker" "start" "-a" "04e2d6b51f337663ae86e02fea4062698d7cec65e9589e2e439b9b5d8c5e1824", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "04e2d6b51f337663ae86e02fea4062698d7cec65e9589e2e439b9b5d8c5e1824", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04e2d6b51f337663ae86e02fea4062698d7cec65e9589e2e439b9b5d8c5e1824", kill_on_drop: false }`
[INFO] [stdout] 04e2d6b51f337663ae86e02fea4062698d7cec65e9589e2e439b9b5d8c5e1824
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5550b087cca7a10b67148b4935ea8a652c87f9bbd7ba32e4f509071529d5b955
[INFO] running `Command { std: "docker" "start" "-a" "5550b087cca7a10b67148b4935ea8a652c87f9bbd7ba32e4f509071529d5b955", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.2.6
[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 2.82s
[INFO] running `Command { std: "docker" "inspect" "5550b087cca7a10b67148b4935ea8a652c87f9bbd7ba32e4f509071529d5b955", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5550b087cca7a10b67148b4935ea8a652c87f9bbd7ba32e4f509071529d5b955", kill_on_drop: false }`
[INFO] [stdout] 5550b087cca7a10b67148b4935ea8a652c87f9bbd7ba32e4f509071529d5b955
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 569b45834baba5c6e5252b8859fcb1167c9619f2b6d08a2e76d614a5e6c09b58
[INFO] running `Command { std: "docker" "start" "-a" "569b45834baba5c6e5252b8859fcb1167c9619f2b6d08a2e76d614a5e6c09b58", kill_on_drop: false }`
[INFO] [stderr]    Compiling histogram-sampler v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.84s
[INFO] running `Command { std: "docker" "inspect" "569b45834baba5c6e5252b8859fcb1167c9619f2b6d08a2e76d614a5e6c09b58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "569b45834baba5c6e5252b8859fcb1167c9619f2b6d08a2e76d614a5e6c09b58", kill_on_drop: false }`
[INFO] [stdout] 569b45834baba5c6e5252b8859fcb1167c9619f2b6d08a2e76d614a5e6c09b58
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3ca66907e8536cc20a72042158218c8c052860ba215d1a0c3642e0384e2fbbc3
[INFO] running `Command { std: "docker" "start" "-a" "3ca66907e8536cc20a72042158218c8c052860ba215d1a0c3642e0384e2fbbc3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.18s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/histogram_sampler-4bcc1ac372a73e3e)
[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 1.04s
[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 0.52s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3ca66907e8536cc20a72042158218c8c052860ba215d1a0c3642e0384e2fbbc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ca66907e8536cc20a72042158218c8c052860ba215d1a0c3642e0384e2fbbc3", kill_on_drop: false }`
[INFO] [stdout] 3ca66907e8536cc20a72042158218c8c052860ba215d1a0c3642e0384e2fbbc3