[INFO] cloning repository https://github.com/JMercie/Rust_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/JMercie/Rust_Book_Exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJMercie%2FRust_Book_Exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJMercie%2FRust_Book_Exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] eb7d2451947e827cb278831802668ed1fbd1c65b
[INFO] checking JMercie/Rust_Book_Exercises against try#8b72f65b805cbe4c261de45030d663f524f27376 for pr-78991
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJMercie%2FRust_Book_Exercises" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JMercie/Rust_Book_Exercises on toolchain 8b72f65b805cbe4c261de45030d663f524f27376
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JMercie/Rust_Book_Exercises
[INFO] finished tweaking git repo https://github.com/JMercie/Rust_Book_Exercises
[INFO] tweaked toml for git repo https://github.com/JMercie/Rust_Book_Exercises written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/JMercie/Rust_Book_Exercises already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 05f9c18c3cd73a197b0467a29bba25e0a9d745c0293cf2085b27e14d8f61d187
[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" "05f9c18c3cd73a197b0467a29bba25e0a9d745c0293cf2085b27e14d8f61d187", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05f9c18c3cd73a197b0467a29bba25e0a9d745c0293cf2085b27e14d8f61d187", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05f9c18c3cd73a197b0467a29bba25e0a9d745c0293cf2085b27e14d8f61d187", kill_on_drop: false }`
[INFO] [stdout] 05f9c18c3cd73a197b0467a29bba25e0a9d745c0293cf2085b27e14d8f61d187
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "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] dff523e1a7aa8cd657ed8696f1f4120b9a91ce041c7d8e49e26034aec4d76272
[INFO] running `Command { std: "docker" "start" "-a" "dff523e1a7aa8cd657ed8696f1f4120b9a91ce041c7d8e49e26034aec4d76272", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_book_exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "dff523e1a7aa8cd657ed8696f1f4120b9a91ce041c7d8e49e26034aec4d76272", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dff523e1a7aa8cd657ed8696f1f4120b9a91ce041c7d8e49e26034aec4d76272", kill_on_drop: false }`
[INFO] [stdout] dff523e1a7aa8cd657ed8696f1f4120b9a91ce041c7d8e49e26034aec4d76272