[INFO] cloning repository https://github.com/david-rust-bootcamp/02-concurrency
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/david-rust-bootcamp/02-concurrency" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavid-rust-bootcamp%2F02-concurrency", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavid-rust-bootcamp%2F02-concurrency'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1fe912562a98d6a2dd58a8884740aa091354c8f6
[INFO] checking david-rust-bootcamp/02-concurrency/1fe912562a98d6a2dd58a8884740aa091354c8f6 against master#0f6e1ae67854c3c44726e8376144c16b465fe7c6 for pr-129392
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavid-rust-bootcamp%2F02-concurrency" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/david-rust-bootcamp/02-concurrency on toolchain 0f6e1ae67854c3c44726e8376144c16b465fe7c6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/david-rust-bootcamp/02-concurrency
[INFO] finished tweaking git repo https://github.com/david-rust-bootcamp/02-concurrency
[INFO] tweaked toml for git repo https://github.com/david-rust-bootcamp/02-concurrency written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/david-rust-bootcamp/02-concurrency 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" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c4ee8b4395c324bf4fed350612e3d0d9720480c4f2c2b3095ad61f753d18300c
[INFO] running `Command { std: "docker" "start" "-a" "c4ee8b4395c324bf4fed350612e3d0d9720480c4f2c2b3095ad61f753d18300c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c4ee8b4395c324bf4fed350612e3d0d9720480c4f2c2b3095ad61f753d18300c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4ee8b4395c324bf4fed350612e3d0d9720480c4f2c2b3095ad61f753d18300c", kill_on_drop: false }`
[INFO] [stdout] c4ee8b4395c324bf4fed350612e3d0d9720480c4f2c2b3095ad61f753d18300c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0dd07d8eb1f01bd625b986b295ce71c58e1684869cf7b36f5db1984bada6f836
[INFO] running `Command { std: "docker" "start" "-a" "0dd07d8eb1f01bd625b986b295ce71c58e1684869cf7b36f5db1984bada6f836", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]     Checking regex-syntax v0.8.4
[INFO] [stderr]     Checking lazy_static v1.5.0
[INFO] [stderr]     Checking log v0.4.22
[INFO] [stderr]     Checking parking_lot_core v0.9.10
[INFO] [stderr]     Checking hashbrown v0.14.5
[INFO] [stderr]     Checking oneshot v0.1.8
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking sharded-slab v0.1.7
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]     Checking dashmap v5.5.3
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling syn v2.0.68
[INFO] [stderr]     Checking regex-automata v0.4.7
[INFO] [stderr]     Checking regex v1.10.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling tokio-macros v2.3.0
[INFO] [stderr]     Checking tokio v1.38.0
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking tracing-subscriber v0.3.18
[INFO] [stderr]     Checking concurrency v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.58s
[INFO] running `Command { std: "docker" "inspect" "0dd07d8eb1f01bd625b986b295ce71c58e1684869cf7b36f5db1984bada6f836", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0dd07d8eb1f01bd625b986b295ce71c58e1684869cf7b36f5db1984bada6f836", kill_on_drop: false }`
[INFO] [stdout] 0dd07d8eb1f01bd625b986b295ce71c58e1684869cf7b36f5db1984bada6f836