[INFO] cloning repository https://github.com/tsuka-ryu/rust-the-book
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tsuka-ryu/rust-the-book" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftsuka-ryu%2Frust-the-book", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftsuka-ryu%2Frust-the-book'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 09964a87a1abf3e043334baca6510b7c98a93460
[INFO] checking tsuka-ryu/rust-the-book/09964a87a1abf3e043334baca6510b7c98a93460 against master#042c759f774872cf2f94c6685ce87e24c046c722 for pr-156977
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftsuka-ryu%2Frust-the-book" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/tsuka-ryu/rust-the-book
[INFO] finished tweaking git repo https://github.com/tsuka-ryu/rust-the-book
[INFO] tweaked toml for git repo https://github.com/tsuka-ryu/rust-the-book written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tsuka-ryu/rust-the-book on toolchain 042c759f774872cf2f94c6685ce87e24c046c722
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+042c759f774872cf2f94c6685ce87e24c046c722" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/tsuka-ryu/rust-the-book 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" "+042c759f774872cf2f94c6685ce87e24c046c722" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 35bbddba5912e0279bfcb98adc7447c89f52391717ed4779122073c092604b74
[INFO] running `Command { std: "docker" "start" "35bbddba5912e0279bfcb98adc7447c89f52391717ed4779122073c092604b74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "35bbddba5912e0279bfcb98adc7447c89f52391717ed4779122073c092604b74" "/opt/rustwide/cargo-home/bin/cargo" "+042c759f774872cf2f94c6685ce87e24c046c722" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "35bbddba5912e0279bfcb98adc7447c89f52391717ed4779122073c092604b74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "35bbddba5912e0279bfcb98adc7447c89f52391717ed4779122073c092604b74" "/opt/rustwide/cargo-home/bin/cargo" "+042c759f774872cf2f94c6685ce87e24c046c722" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking ch12-io-project v0.1.0 (/opt/rustwide/workdir/ch12-io-project)
[INFO] [stderr]     Checking ch13-iterators-closures v0.1.0 (/opt/rustwide/workdir/ch13-iterators-closures)
[INFO] [stderr]     Checking ch15-smart-pointers v0.1.0 (/opt/rustwide/workdir/ch15-smart-pointers)
[INFO] [stderr]     Checking ch06-enums v0.1.0 (/opt/rustwide/workdir/ch06-enums)
[INFO] [stderr]     Checking ch05-structs v0.1.0 (/opt/rustwide/workdir/ch05-structs)
[INFO] [stderr]     Checking ch08-collections v0.1.0 (/opt/rustwide/workdir/ch08-collections)
[INFO] [stderr]     Checking ch09-error-handling v0.1.0 (/opt/rustwide/workdir/ch09-error-handling)
[INFO] [stderr]     Checking ch10-generics-traits-lifetimes v0.1.0 (/opt/rustwide/workdir/ch10-generics-traits-lifetimes)
[INFO] [stderr]     Checking ch07-packages-crates-modules v0.1.0 (/opt/rustwide/workdir/ch07-packages-crates-modules)
[INFO] [stderr]     Checking ch11-testing v0.1.0 (/opt/rustwide/workdir/ch11-testing)
[INFO] [stderr]     Checking colored v2.2.0
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking ch01-hello-world v0.1.0 (/opt/rustwide/workdir/ch01-hello-world)
[INFO] [stderr]     Checking ch19-advanced-features v0.1.0 (/opt/rustwide/workdir/ch19-advanced-features)
[INFO] [stderr]     Checking ch03-common-concepts v0.1.0 (/opt/rustwide/workdir/ch03-common-concepts)
[INFO] [stderr]     Checking ch04-ownership v0.1.0 (/opt/rustwide/workdir/ch04-ownership)
[INFO] [stderr]     Checking ch16-concurrency v0.1.0 (/opt/rustwide/workdir/ch16-concurrency)
[INFO] [stderr]     Checking ch20-final-project v0.1.0 (/opt/rustwide/workdir/ch20-final-project)
[INFO] [stderr]     Checking ch17-oop v0.1.0 (/opt/rustwide/workdir/ch17-oop)
[INFO] [stderr]     Checking ch18-patterns v0.1.0 (/opt/rustwide/workdir/ch18-patterns)
[INFO] [stderr]     Checking ch02-guessing-game v0.1.0 (/opt/rustwide/workdir/ch02-guessing-game)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.79s
[INFO] running `Command { std: "docker" "inspect" "35bbddba5912e0279bfcb98adc7447c89f52391717ed4779122073c092604b74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35bbddba5912e0279bfcb98adc7447c89f52391717ed4779122073c092604b74", kill_on_drop: false }`
[INFO] [stdout] 35bbddba5912e0279bfcb98adc7447c89f52391717ed4779122073c092604b74