[INFO] cloning repository https://github.com/tmaxmax/polynomial-roots-calculator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tmaxmax/polynomial-roots-calculator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftmaxmax%2Fpolynomial-roots-calculator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftmaxmax%2Fpolynomial-roots-calculator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0a36f512ed8cbcca964b0144b7ef9d0cba7840a5
[INFO] building tmaxmax/polynomial-roots-calculator against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftmaxmax%2Fpolynomial-roots-calculator" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tmaxmax/polynomial-roots-calculator on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/tmaxmax/polynomial-roots-calculator
[INFO] finished tweaking git repo https://github.com/tmaxmax/polynomial-roots-calculator
[INFO] tweaked toml for git repo https://github.com/tmaxmax/polynomial-roots-calculator written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/tmaxmax/polynomial-roots-calculator 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b82a9209593499e68ee33fbdf62877840ad01f54cfcb4d3ac55879533c2993c5
[INFO] running `Command { std: "docker" "start" "-a" "b82a9209593499e68ee33fbdf62877840ad01f54cfcb4d3ac55879533c2993c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b82a9209593499e68ee33fbdf62877840ad01f54cfcb4d3ac55879533c2993c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b82a9209593499e68ee33fbdf62877840ad01f54cfcb4d3ac55879533c2993c5", kill_on_drop: false }`
[INFO] [stdout] b82a9209593499e68ee33fbdf62877840ad01f54cfcb4d3ac55879533c2993c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f9859600aa5f4910b6dbfeb768cf4517f6996d650b7ec54346380d32e1b6c8b5
[INFO] running `Command { std: "docker" "start" "-a" "f9859600aa5f4910b6dbfeb768cf4517f6996d650b7ec54346380d32e1b6c8b5", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling anyhow v1.0.71
[INFO] [stderr]    Compiling polynomial-roots-calculator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `primitive`, `gcd`, and `gsfd` are never used
[INFO] [stdout]   --> src/polynomial.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Polynomial {
[INFO] [stdout]    | --------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn primitive(&self) -> (Polynomial, f64) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     pub fn gcd(&self, rhs: &Self) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 57 |     pub fn gsfd(&self) -> Self {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `gcd` is never used
[INFO] [stdout]    --> src/polynomial.rs:303:4
[INFO] [stdout]     |
[INFO] [stdout] 303 | fn gcd(mut r0: Vec<Rational32>, mut r1: Vec<Rational32>) -> Vec<Rational32> {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `primitive` is never used
[INFO] [stdout]    --> src/polynomial.rs:319:4
[INFO] [stdout]     |
[INFO] [stdout] 319 | fn primitive(v: &mut [Rational32]) -> Rational32 {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.63s
[INFO] running `Command { std: "docker" "inspect" "f9859600aa5f4910b6dbfeb768cf4517f6996d650b7ec54346380d32e1b6c8b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9859600aa5f4910b6dbfeb768cf4517f6996d650b7ec54346380d32e1b6c8b5", kill_on_drop: false }`
[INFO] [stdout] f9859600aa5f4910b6dbfeb768cf4517f6996d650b7ec54346380d32e1b6c8b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cdf176ac5f774e0f8cba4f1645f5018445b75a00c3e07059d1119dc219efb52d
[INFO] running `Command { std: "docker" "start" "-a" "cdf176ac5f774e0f8cba4f1645f5018445b75a00c3e07059d1119dc219efb52d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.146
[INFO] [stderr]    Compiling getrandom v0.2.10
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling polynomial-roots-calculator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 3.40s
[INFO] running `Command { std: "docker" "inspect" "cdf176ac5f774e0f8cba4f1645f5018445b75a00c3e07059d1119dc219efb52d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cdf176ac5f774e0f8cba4f1645f5018445b75a00c3e07059d1119dc219efb52d", kill_on_drop: false }`
[INFO] [stdout] cdf176ac5f774e0f8cba4f1645f5018445b75a00c3e07059d1119dc219efb52d