[INFO] cloning repository https://github.com/duganc/polynomial-rings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/duganc/polynomial-rings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fduganc%2Fpolynomial-rings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fduganc%2Fpolynomial-rings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 93f50ef4a3841c0a287666a14f5747d162dfb0d4
[INFO] checking duganc/polynomial-rings against master#430feb24a46993e5073c1bb1b39da190d83fa2bf for pr-78363
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fduganc%2Fpolynomial-rings" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/duganc/polynomial-rings on toolchain 430feb24a46993e5073c1bb1b39da190d83fa2bf
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+430feb24a46993e5073c1bb1b39da190d83fa2bf" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/duganc/polynomial-rings
[INFO] finished tweaking git repo https://github.com/duganc/polynomial-rings
[INFO] tweaked toml for git repo https://github.com/duganc/polynomial-rings written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/duganc/polynomial-rings already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+430feb24a46993e5073c1bb1b39da190d83fa2bf" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+430feb24a46993e5073c1bb1b39da190d83fa2bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f8831044c88699577a0b34b49b8e3520b0a42e0386dd0f26d1e7daa0eb74ae80
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f8831044c88699577a0b34b49b8e3520b0a42e0386dd0f26d1e7daa0eb74ae80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f8831044c88699577a0b34b49b8e3520b0a42e0386dd0f26d1e7daa0eb74ae80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8831044c88699577a0b34b49b8e3520b0a42e0386dd0f26d1e7daa0eb74ae80", kill_on_drop: false }`
[INFO] [stdout] f8831044c88699577a0b34b49b8e3520b0a42e0386dd0f26d1e7daa0eb74ae80
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+430feb24a46993e5073c1bb1b39da190d83fa2bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c55b40e31506edd480af9e8fbc4fd126abf2814a43af33e100b72be329463d45
[INFO] running `Command { std: "docker" "start" "-a" "c55b40e31506edd480af9e8fbc4fd126abf2814a43af33e100b72be329463d45", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.5
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking polynomial-rings v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `num::complex::Complex`
[INFO] [stdout]  --> src/ring.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use num::complex::Complex;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `VARIABLE`
[INFO] [stdout]  --> src/ring.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | const VARIABLE: &str = "x";
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `zero`
[INFO] [stdout]   --> src/ring.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn zero() -> Self {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_degree`
[INFO] [stdout]   --> src/ring.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn get_degree(&self) -> i8 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_string`
[INFO] [stdout]   --> src/ring.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn to_string(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_string_term`
[INFO] [stdout]   --> src/ring.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn to_string_term(coefficient: T, variable: String, power: u16) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_string_variable`
[INFO] [stdout]   --> src/ring.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 96 |     fn to_string_variable(variable: String, power: u16) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.60s
[INFO] running `Command { std: "docker" "inspect" "c55b40e31506edd480af9e8fbc4fd126abf2814a43af33e100b72be329463d45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c55b40e31506edd480af9e8fbc4fd126abf2814a43af33e100b72be329463d45", kill_on_drop: false }`
[INFO] [stdout] c55b40e31506edd480af9e8fbc4fd126abf2814a43af33e100b72be329463d45