[INFO] cloning repository https://github.com/modulitos/rust-lang-book-exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/modulitos/rust-lang-book-exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodulitos%2Frust-lang-book-exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodulitos%2Frust-lang-book-exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 17c45d6430a5bbee27a361db263f67e220a2bb05
[INFO] checking modulitos/rust-lang-book-exercises against master#f5f33ec0e0455eefa72fc5567eb1280a4d5ee206 for pr-83312
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodulitos%2Frust-lang-book-exercises" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/modulitos/rust-lang-book-exercises on toolchain f5f33ec0e0455eefa72fc5567eb1280a4d5ee206
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/modulitos/rust-lang-book-exercises
[INFO] finished tweaking git repo https://github.com/modulitos/rust-lang-book-exercises
[INFO] tweaked toml for git repo https://github.com/modulitos/rust-lang-book-exercises written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/modulitos/rust-lang-book-exercises already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4fbdc5ac4a37871b34c728ed99f9507134b75853ce837618dd923c4079740e4e
[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" "4fbdc5ac4a37871b34c728ed99f9507134b75853ce837618dd923c4079740e4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4fbdc5ac4a37871b34c728ed99f9507134b75853ce837618dd923c4079740e4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fbdc5ac4a37871b34c728ed99f9507134b75853ce837618dd923c4079740e4e", kill_on_drop: false }`
[INFO] [stdout] 4fbdc5ac4a37871b34c728ed99f9507134b75853ce837618dd923c4079740e4e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 400be059c39974fc5628e4c9489997b247d3f2e80c941a7eb913f6a86f0ef029
[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" "400be059c39974fc5628e4c9489997b247d3f2e80c941a7eb913f6a86f0ef029", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_lang_book v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `post`
[INFO] [stdout]   --> src/different_types_blog.rs:83:13
[INFO] [stdout]    |
[INFO] [stdout] 83 |         let post = post.reject();
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `advanced_traits`, `fearless_concurrency`, `smart_pointers`, `state_pattern_blog`
[INFO] [stdout]  --> src/bin/main.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rust_lang_book::{advanced_traits, fearless_concurrency, smart_pointers, state_pattern_blog};
[INFO] [stdout]   |                      ^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `advanced_traits`, `fearless_concurrency`, `smart_pointers`, `state_pattern_blog`
[INFO] [stdout]  --> src/bin/main.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rust_lang_book::{advanced_traits, fearless_concurrency, smart_pointers, state_pattern_blog};
[INFO] [stdout]   |                      ^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.11s
[INFO] running `Command { std: "docker" "inspect" "400be059c39974fc5628e4c9489997b247d3f2e80c941a7eb913f6a86f0ef029", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "400be059c39974fc5628e4c9489997b247d3f2e80c941a7eb913f6a86f0ef029", kill_on_drop: false }`
[INFO] [stdout] 400be059c39974fc5628e4c9489997b247d3f2e80c941a7eb913f6a86f0ef029