[INFO] fetching crate rustnomial 0.3.2...
[INFO] checking rustnomial-0.3.2 against master#32da2305880765a4c76180086959a2d5da131565 for pr-105102-1
[INFO] extracting crate rustnomial 0.3.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate rustnomial 0.3.2 on toolchain 32da2305880765a4c76180086959a2d5da131565
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+32da2305880765a4c76180086959a2d5da131565" "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-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+32da2305880765a4c76180086959a2d5da131565" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+32da2305880765a4c76180086959a2d5da131565" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-complex v0.4.2
[INFO] [stderr]   Downloaded num-rational v0.4.1
[INFO] [stderr]   Downloaded num-bigint v0.4.3
[INFO] [stderr]   Downloaded roots v0.0.7
[INFO] [stderr]   Downloaded num v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+32da2305880765a4c76180086959a2d5da131565" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f16fd7d7bc23cc81f0bc09c987737eddbcaad3c549255a1268ec325278fcea0f
[INFO] running `Command { std: "docker" "start" "-a" "f16fd7d7bc23cc81f0bc09c987737eddbcaad3c549255a1268ec325278fcea0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f16fd7d7bc23cc81f0bc09c987737eddbcaad3c549255a1268ec325278fcea0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f16fd7d7bc23cc81f0bc09c987737eddbcaad3c549255a1268ec325278fcea0f", kill_on_drop: false }`
[INFO] [stdout] f16fd7d7bc23cc81f0bc09c987737eddbcaad3c549255a1268ec325278fcea0f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+32da2305880765a4c76180086959a2d5da131565" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c4170c5f83728bf42c7aee35501101c6c31c7f09b7fc57fc7252d1968714590b
[INFO] running `Command { std: "docker" "start" "-a" "c4170c5f83728bf42c7aee35501101c6c31c7f09b7fc57fc7252d1968714590b", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking roots v0.0.7
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]     Checking num-complex v0.4.2
[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 return value of `from` that must be used
[INFO] [stdout]   --> src/benchmarks/bench.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |             SparsePolynomial::from(vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
[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:63:13
[INFO] [stdout]    |
[INFO] [stdout] 63 |             Polynomial::new(vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10]) * 5;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the arithmetic operation produces a value
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 63 |             let _ = Polynomial::new(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:70:13
[INFO] [stdout]    |
[INFO] [stdout] 70 |             SparsePolynomial::from(vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10]) * 5;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the arithmetic operation produces a value
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 70 |             let _ = 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]    |             ^^^^^^^^^^^^^ the arithmetic operation produces a value
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 78 |             let _ = a.clone() / 5;
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.99s
[INFO] running `Command { std: "docker" "inspect" "c4170c5f83728bf42c7aee35501101c6c31c7f09b7fc57fc7252d1968714590b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4170c5f83728bf42c7aee35501101c6c31c7f09b7fc57fc7252d1968714590b", kill_on_drop: false }`
[INFO] [stdout] c4170c5f83728bf42c7aee35501101c6c31c7f09b7fc57fc7252d1968714590b