[INFO] cloning repository https://github.com/Pizzascripters/abstract-algebra
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Pizzascripters/abstract-algebra" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPizzascripters%2Fabstract-algebra", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPizzascripters%2Fabstract-algebra'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7663b6781a80316743bf0a434497b531f3ef4bb7
[INFO] checking Pizzascripters/abstract-algebra against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPizzascripters%2Fabstract-algebra" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Pizzascripters/abstract-algebra
[INFO] finished tweaking git repo https://github.com/Pizzascripters/abstract-algebra
[INFO] tweaked toml for git repo https://github.com/Pizzascripters/abstract-algebra written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Pizzascripters/abstract-algebra on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Pizzascripters/abstract-algebra 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" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded os_str_bytes v6.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 462a192e4568b0da4c42812ac97e36e91a7ca9e42ee0b92e148b2f0516fe3e8b
[INFO] running `Command { std: "docker" "start" "-a" "462a192e4568b0da4c42812ac97e36e91a7ca9e42ee0b92e148b2f0516fe3e8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "462a192e4568b0da4c42812ac97e36e91a7ca9e42ee0b92e148b2f0516fe3e8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "462a192e4568b0da4c42812ac97e36e91a7ca9e42ee0b92e148b2f0516fe3e8b", kill_on_drop: false }`
[INFO] [stdout] 462a192e4568b0da4c42812ac97e36e91a7ca9e42ee0b92e148b2f0516fe3e8b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a11a7cdd80f9fb876c4325ae95e437bd59aea854a7dbf0fe757cb7c67736edc2
[INFO] running `Command { std: "docker" "start" "-a" "a11a7cdd80f9fb876c4325ae95e437bd59aea854a7dbf0fe757cb7c67736edc2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.125
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]     Checking os_str_bytes v6.0.1
[INFO] [stderr]    Compiling indexmap v1.8.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking clap_lex v0.2.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap_derive v3.1.18
[INFO] [stderr]     Checking clap v3.1.18
[INFO] [stderr]     Checking abstract-algebra v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `identity` is never used
[INFO] [stdout]  --> src/group/group.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub trait Group<G: Clone + ToString> {
[INFO] [stdout]   |           ----- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 9 |     fn identity(&self) -> G;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `identity` is never used
[INFO] [stdout]  --> src/group/group.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub trait Group<G: Clone + ToString> {
[INFO] [stdout]   |           ----- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 9 |     fn identity(&self) -> G;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.25s
[INFO] running `Command { std: "docker" "inspect" "a11a7cdd80f9fb876c4325ae95e437bd59aea854a7dbf0fe757cb7c67736edc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a11a7cdd80f9fb876c4325ae95e437bd59aea854a7dbf0fe757cb7c67736edc2", kill_on_drop: false }`
[INFO] [stdout] a11a7cdd80f9fb876c4325ae95e437bd59aea854a7dbf0fe757cb7c67736edc2