[INFO] fetching crate kurobako 0.2.10...
[INFO] checking kurobako-0.2.10 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate kurobako 0.2.10 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate kurobako 0.2.10 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate kurobako 0.2.10
[INFO] finished tweaking crates.io crate kurobako 0.2.10
[INFO] tweaked toml for crates.io crate kurobako 0.2.10 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate kurobako 0.2.10 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded trackable v1.2.0
[INFO] [stderr]   Downloaded rustats v0.1.2
[INFO] [stderr]   Downloaded nasbench v0.1.2
[INFO] [stderr]   Downloaded kurobako_solvers v0.2.2
[INFO] [stderr]   Downloaded build_const v0.2.2
[INFO] [stderr]   Downloaded crc v1.8.1
[INFO] [stderr]   Downloaded rand_distr v0.3.0
[INFO] [stderr]   Downloaded hdf5file v0.1.1
[INFO] [stderr]   Downloaded kurobako_problems v0.1.14
[INFO] [stderr]   Downloaded kurobako_core v0.1.12
[INFO] [stderr]   Downloaded yamakan v0.2.0
[INFO] [stderr]   Downloaded randomforest v0.1.6
[INFO] [stderr]   Downloaded rlua v0.17.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c0f4e3cf3d6bbc7c5898ba556f8c61bf882bc3e3d89a7c7892c5d9b2df026a52
[INFO] running `Command { std: "docker" "start" "-a" "c0f4e3cf3d6bbc7c5898ba556f8c61bf882bc3e3d89a7c7892c5d9b2df026a52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0f4e3cf3d6bbc7c5898ba556f8c61bf882bc3e3d89a7c7892c5d9b2df026a52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0f4e3cf3d6bbc7c5898ba556f8c61bf882bc3e3d89a7c7892c5d9b2df026a52", kill_on_drop: false }`
[INFO] [stdout] c0f4e3cf3d6bbc7c5898ba556f8c61bf882bc3e3d89a7c7892c5d9b2df026a52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 12b1dca83b3117ddc9b5881813a2a832f71a2dc9ef7ce090d9a60099c75cac06
[INFO] running `Command { std: "docker" "start" "-a" "12b1dca83b3117ddc9b5881813a2a832f71a2dc9ef7ce090d9a60099c75cac06", kill_on_drop: false }`
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[INFO] [stderr]    Compiling trackable_derive v1.0.0
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[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]     Checking trackable v1.2.0
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[INFO] [stderr]     Checking bytecodec v0.4.15
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[INFO] [stderr]     Checking protobuf_codec v0.2.8
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[INFO] [stderr]     Checking kurobako_core v0.1.12
[INFO] [stderr]     Checking nasbench v0.1.2
[INFO] [stderr]     Checking kurobako_solvers v0.2.2
[INFO] [stderr]     Checking kurobako_problems v0.1.14
[INFO] [stderr]     Checking kurobako v0.2.10 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `BestValues` is never constructed
[INFO] [stdout]    --> src/plot/curve.rs:364:8
[INFO] [stdout]     |
[INFO] [stdout] 364 | struct BestValues {}
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BestValues` is never constructed
[INFO] [stdout]    --> src/plot/curve.rs:364:8
[INFO] [stdout]     |
[INFO] [stdout] 364 | struct BestValues {}
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 00s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rlua v0.17.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "12b1dca83b3117ddc9b5881813a2a832f71a2dc9ef7ce090d9a60099c75cac06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12b1dca83b3117ddc9b5881813a2a832f71a2dc9ef7ce090d9a60099c75cac06", kill_on_drop: false }`
[INFO] [stdout] 12b1dca83b3117ddc9b5881813a2a832f71a2dc9ef7ce090d9a60099c75cac06