[INFO] fetching crate rustnomial 0.3.2...
[INFO] checking rustnomial-0.3.2 against try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477
[INFO] extracting crate rustnomial 0.3.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate rustnomial 0.3.2 on toolchain 3d9fdbff4f377de96b3a51174e7a64086bee9a5c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rustnomial 0.3.2
[INFO] finished tweaking crates.io crate rustnomial 0.3.2
[INFO] tweaked toml for crates.io crate rustnomial 0.3.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-bigint v0.4.0
[INFO] [stderr]   Downloaded roots v0.0.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 70ed406abaf636457775f826f5300487fbdb699113c133bf2130b2312efba25c
[INFO] running `Command { std: "docker" "start" "-a" "70ed406abaf636457775f826f5300487fbdb699113c133bf2130b2312efba25c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "70ed406abaf636457775f826f5300487fbdb699113c133bf2130b2312efba25c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70ed406abaf636457775f826f5300487fbdb699113c133bf2130b2312efba25c", kill_on_drop: false }`
[INFO] [stdout] 70ed406abaf636457775f826f5300487fbdb699113c133bf2130b2312efba25c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bae9334e690f7685c537d32170a27a27a410028f5bf3b1dfbccc8e594f0224b5
[INFO] running `Command { std: "docker" "start" "-a" "bae9334e690f7685c537d32170a27a27a410028f5bf3b1dfbccc8e594f0224b5", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking roots v0.0.7
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.4.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking rustnomial v0.3.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::BTreeMap`
[INFO] [stdout]  --> src/benchmarks/bench.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     use std::collections::BTreeMap;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]   --> src/benchmarks/bench.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 63 |             Polynomial::new(vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10]) * 5;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]   --> src/benchmarks/bench.rs:70:13
[INFO] [stdout]    |
[INFO] [stdout] 70 |             SparsePolynomial::from(vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10]) * 5;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]   --> src/benchmarks/bench.rs:78:13
[INFO] [stdout]    |
[INFO] [stdout] 78 |             a.clone() / 5;
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.35s
[INFO] running `Command { std: "docker" "inspect" "bae9334e690f7685c537d32170a27a27a410028f5bf3b1dfbccc8e594f0224b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bae9334e690f7685c537d32170a27a27a410028f5bf3b1dfbccc8e594f0224b5", kill_on_drop: false }`
[INFO] [stdout] bae9334e690f7685c537d32170a27a27a410028f5bf3b1dfbccc8e594f0224b5