[INFO] fetching crate statistics 0.4.1...
[INFO] testing statistics-0.4.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate statistics 0.4.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate statistics 0.4.1 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 statistics 0.4.1
[INFO] finished tweaking crates.io crate statistics 0.4.1
[INFO] tweaked toml for crates.io crate statistics 0.4.1 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 52e3de776d40afe9130d0150729474facee162a20de2bfee2b63d2a44a5759b9
[INFO] running `Command { std: "docker" "start" "-a" "52e3de776d40afe9130d0150729474facee162a20de2bfee2b63d2a44a5759b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "52e3de776d40afe9130d0150729474facee162a20de2bfee2b63d2a44a5759b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52e3de776d40afe9130d0150729474facee162a20de2bfee2b63d2a44a5759b9", kill_on_drop: false }`
[INFO] [stdout] 52e3de776d40afe9130d0150729474facee162a20de2bfee2b63d2a44a5759b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 6b643579eed6057ea408539e4315d4eb0ebf4368bc909c8293bd06c26ddc87c3
[INFO] running `Command { std: "docker" "start" "-a" "6b643579eed6057ea408539e4315d4eb0ebf4368bc909c8293bd06c26ddc87c3", kill_on_drop: false }`
[INFO] [stderr]    Compiling statistics v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]   --> src/real.rs:12:21
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn from_natural(usize) -> Self;
[INFO] [stdout]    |                     ^^^^^ help: try naming the parameter or explicitly ignoring it: `_: usize`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "6b643579eed6057ea408539e4315d4eb0ebf4368bc909c8293bd06c26ddc87c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b643579eed6057ea408539e4315d4eb0ebf4368bc909c8293bd06c26ddc87c3", kill_on_drop: false }`
[INFO] [stdout] 6b643579eed6057ea408539e4315d4eb0ebf4368bc909c8293bd06c26ddc87c3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] ce8e11fe29d6133d6dc653e271f4c977a0ae07a9e1dc8df70bc50c8fdee628ae
[INFO] running `Command { std: "docker" "start" "-a" "ce8e11fe29d6133d6dc653e271f4c977a0ae07a9e1dc8df70bc50c8fdee628ae", kill_on_drop: false }`
[INFO] [stderr]    Compiling assert v0.7.4
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]   --> src/real.rs:12:21
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn from_natural(usize) -> Self;
[INFO] [stdout]    |                     ^^^^^ help: try naming the parameter or explicitly ignoring it: `_: usize`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling statistics v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]   --> src/real.rs:12:21
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn from_natural(usize) -> Self;
[INFO] [stdout]    |                     ^^^^^ help: try naming the parameter or explicitly ignoring it: `_: usize`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `Command { std: "docker" "inspect" "ce8e11fe29d6133d6dc653e271f4c977a0ae07a9e1dc8df70bc50c8fdee628ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce8e11fe29d6133d6dc653e271f4c977a0ae07a9e1dc8df70bc50c8fdee628ae", kill_on_drop: false }`
[INFO] [stdout] ce8e11fe29d6133d6dc653e271f4c977a0ae07a9e1dc8df70bc50c8fdee628ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 621a58950716a3b1b15229ecdc83a781334e46a1c534a1be7446e9b9bc816efe
[INFO] running `Command { std: "docker" "start" "-a" "621a58950716a3b1b15229ecdc83a781334e46a1c534a1be7446e9b9bc816efe", kill_on_drop: false }`
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stderr]   --> src/real.rs:12:21
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn from_natural(usize) -> Self;
[INFO] [stderr]    |                     ^^^^^ help: try naming the parameter or explicitly ignoring it: `_: usize`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stderr]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stderr] 
[INFO] [stderr] warning: `statistics` (lib) generated 1 warning
[INFO] [stderr] warning: `statistics` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/statistics-c39f478d03b76694)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests statistics
[INFO] [stdout] running 5 tests
[INFO] [stdout] test moment::tests::mean ... ok
[INFO] [stdout] test moment::tests::mean_0 ... ok
[INFO] [stdout] test moment::tests::variance_0 ... ok
[INFO] [stdout] test moment::tests::variance ... ok
[INFO] [stdout] test moment::tests::variance_1 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[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" "621a58950716a3b1b15229ecdc83a781334e46a1c534a1be7446e9b9bc816efe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "621a58950716a3b1b15229ecdc83a781334e46a1c534a1be7446e9b9bc816efe", kill_on_drop: false }`
[INFO] [stdout] 621a58950716a3b1b15229ecdc83a781334e46a1c534a1be7446e9b9bc816efe