[INFO] cloning repository https://github.com/Bear-V/learn_rust_by_example_demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Bear-V/learn_rust_by_example_demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBear-V%2Flearn_rust_by_example_demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBear-V%2Flearn_rust_by_example_demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 28c2246a63aa5c07b9f98c34ce3b98bf73a97759
[INFO] testing Bear-V/learn_rust_by_example_demo against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBear-V%2Flearn_rust_by_example_demo" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Bear-V/learn_rust_by_example_demo on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Bear-V/learn_rust_by_example_demo
[INFO] finished tweaking git repo https://github.com/Bear-V/learn_rust_by_example_demo
[INFO] tweaked toml for git repo https://github.com/Bear-V/learn_rust_by_example_demo written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Bear-V/learn_rust_by_example_demo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 98e34cbf750ee7115598995326841341cd75b2c64e5c5509beefe9d6aa86200b
[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" "98e34cbf750ee7115598995326841341cd75b2c64e5c5509beefe9d6aa86200b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98e34cbf750ee7115598995326841341cd75b2c64e5c5509beefe9d6aa86200b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98e34cbf750ee7115598995326841341cd75b2c64e5c5509beefe9d6aa86200b", kill_on_drop: false }`
[INFO] [stdout] 98e34cbf750ee7115598995326841341cd75b2c64e5c5509beefe9d6aa86200b
[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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6a53cf7587b8b2721111880fc1d161aef38f18e4c5e47ce66256841148f4e47f
[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" "6a53cf7587b8b2721111880fc1d161aef38f18e4c5e47ce66256841148f4e47f", kill_on_drop: false }`
[INFO] [stderr]    Compiling learn_rust_by_example_demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected item after doc comment
[INFO] [stdout]  --> src/example/m_enum.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | / /**
[INFO] [stdout] 2 | |  * @Author: ZZX
[INFO] [stdout] 3 | |  * @Description: 枚举
[INFO] [stdout] 4 | |  * @Date: create in 2021/9/9 23:41
[INFO] [stdout] 5 | |  */
[INFO] [stdout]   | |___^ this doc comment doesn't document anything
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::f32::consts::PI`
[INFO] [stdout]  --> src/example/c_formatted_print.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::f32::consts::PI;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]  --> src/example/e_display.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Formatter`
[INFO] [stdout]  --> src/example/e_display.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::fmt::Formatter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]  --> src/example/f_display_list.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Formatter`
[INFO] [stdout]  --> src/example/f_display_list.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::fmt::Formatter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Display`, `Formatter`, `UpperHex`
[INFO] [stdout]  --> src/example/g_formatting.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::fmt::{Display, Formatter, UpperHex};
[INFO] [stdout]   |                ^^^^^^^  ^^^^^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Display`, `Formatter`
[INFO] [stdout]  --> src/example/j_tuple.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{Display, Formatter};
[INFO] [stdout]   |                ^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem`
[INFO] [stdout]  --> src/example/k_array_and_slice.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::mem;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learn_rust_by_example_demo` due to 2 previous errors; 8 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "6a53cf7587b8b2721111880fc1d161aef38f18e4c5e47ce66256841148f4e47f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a53cf7587b8b2721111880fc1d161aef38f18e4c5e47ce66256841148f4e47f", kill_on_drop: false }`
[INFO] [stdout] 6a53cf7587b8b2721111880fc1d161aef38f18e4c5e47ce66256841148f4e47f