[INFO] cloning repository https://github.com/VaclavStebra/rust-book-understanding-ownership
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/VaclavStebra/rust-book-understanding-ownership" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVaclavStebra%2Frust-book-understanding-ownership", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVaclavStebra%2Frust-book-understanding-ownership'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3960aaa13804e7853505d7883f88617de1123cd2
[INFO] checking VaclavStebra/rust-book-understanding-ownership against master#8387315ab3c26a57a1f53a90f188f0bc88514bca for pr-124605
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVaclavStebra%2Frust-book-understanding-ownership" "/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/VaclavStebra/rust-book-understanding-ownership on toolchain 8387315ab3c26a57a1f53a90f188f0bc88514bca
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8387315ab3c26a57a1f53a90f188f0bc88514bca" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/VaclavStebra/rust-book-understanding-ownership
[INFO] finished tweaking git repo https://github.com/VaclavStebra/rust-book-understanding-ownership
[INFO] tweaked toml for git repo https://github.com/VaclavStebra/rust-book-understanding-ownership written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/VaclavStebra/rust-book-understanding-ownership 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" "+8387315ab3c26a57a1f53a90f188f0bc88514bca" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking VaclavStebra/rust-book-understanding-ownership against try#fcc50f77e1a14e407d895972348a0ff09eafc210 for pr-124605
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVaclavStebra%2Frust-book-understanding-ownership" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/VaclavStebra/rust-book-understanding-ownership on toolchain fcc50f77e1a14e407d895972348a0ff09eafc210
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fcc50f77e1a14e407d895972348a0ff09eafc210" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/VaclavStebra/rust-book-understanding-ownership
[INFO] finished tweaking git repo https://github.com/VaclavStebra/rust-book-understanding-ownership
[INFO] tweaked toml for git repo https://github.com/VaclavStebra/rust-book-understanding-ownership written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/VaclavStebra/rust-book-understanding-ownership 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" "+fcc50f77e1a14e407d895972348a0ff09eafc210" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking VaclavStebra/rust-book-understanding-ownership against try#fcc50f77e1a14e407d895972348a0ff09eafc210 for pr-124605
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVaclavStebra%2Frust-book-understanding-ownership" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/VaclavStebra/rust-book-understanding-ownership on toolchain fcc50f77e1a14e407d895972348a0ff09eafc210
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fcc50f77e1a14e407d895972348a0ff09eafc210" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/VaclavStebra/rust-book-understanding-ownership
[INFO] finished tweaking git repo https://github.com/VaclavStebra/rust-book-understanding-ownership
[INFO] tweaked toml for git repo https://github.com/VaclavStebra/rust-book-understanding-ownership written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/VaclavStebra/rust-book-understanding-ownership 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" "+fcc50f77e1a14e407d895972348a0ff09eafc210" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+fcc50f77e1a14e407d895972348a0ff09eafc210" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cb3375200aa7909a5d8d3ab314dcb0a2a4a568cbff073409ca2cde7492169639
[INFO] running `Command { std: "docker" "start" "-a" "cb3375200aa7909a5d8d3ab314dcb0a2a4a568cbff073409ca2cde7492169639", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb3375200aa7909a5d8d3ab314dcb0a2a4a568cbff073409ca2cde7492169639", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb3375200aa7909a5d8d3ab314dcb0a2a4a568cbff073409ca2cde7492169639", kill_on_drop: false }`
[INFO] [stdout] cb3375200aa7909a5d8d3ab314dcb0a2a4a568cbff073409ca2cde7492169639
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+fcc50f77e1a14e407d895972348a0ff09eafc210" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fe7026956428817180df579bf4ab28476e9f0b50540ad36ad0aa1e156f16242b
[INFO] running `Command { std: "docker" "start" "-a" "fe7026956428817180df579bf4ab28476e9f0b50540ad36ad0aa1e156f16242b", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-book-understanding-ownership v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "fe7026956428817180df579bf4ab28476e9f0b50540ad36ad0aa1e156f16242b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe7026956428817180df579bf4ab28476e9f0b50540ad36ad0aa1e156f16242b", kill_on_drop: false }`
[INFO] [stdout] fe7026956428817180df579bf4ab28476e9f0b50540ad36ad0aa1e156f16242b