[INFO] cloning repository https://github.com/LearningOS/learn_rust_rustlings-CL-a11y
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LearningOS/learn_rust_rustlings-CL-a11y" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-CL-a11y", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-CL-a11y'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d17567e336ce1b02774f7692558e5af649fbb41d
[INFO] checking LearningOS/learn_rust_rustlings-CL-a11y/d17567e336ce1b02774f7692558e5af649fbb41d against master#f167efad2f51088d86180ee89177b3d7c9e7c2f5 for pr-129543
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Flearn_rust_rustlings-CL-a11y" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LearningOS/learn_rust_rustlings-CL-a11y on toolchain f167efad2f51088d86180ee89177b3d7c9e7c2f5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LearningOS/learn_rust_rustlings-CL-a11y
[INFO] finished tweaking git repo https://github.com/LearningOS/learn_rust_rustlings-CL-a11y
[INFO] tweaked toml for git repo https://github.com/LearningOS/learn_rust_rustlings-CL-a11y written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/LearningOS/learn_rust_rustlings-CL-a11y 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" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] [stderr]     Updating rustlings v4.7.1 (/workspace/builds/worker-2-tc1/source) -> v4.8.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 464f8e7365bc1dee4b1a561c402b1396019c534a80de7cbb84a2edc53334b90a
[INFO] running `Command { std: "docker" "start" "-a" "464f8e7365bc1dee4b1a561c402b1396019c534a80de7cbb84a2edc53334b90a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "464f8e7365bc1dee4b1a561c402b1396019c534a80de7cbb84a2edc53334b90a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "464f8e7365bc1dee4b1a561c402b1396019c534a80de7cbb84a2edc53334b90a", kill_on_drop: false }`
[INFO] [stdout] 464f8e7365bc1dee4b1a561c402b1396019c534a80de7cbb84a2edc53334b90a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 63e27502c774fabfda5006f160711921041f90cd7b987869d547e1b0f60e80be
[INFO] running `Command { std: "docker" "start" "-a" "63e27502c774fabfda5006f160711921041f90cd7b987869d547e1b0f60e80be", kill_on_drop: false }`
[INFO] [stderr]     Checking console v0.15.0
[INFO] [stderr]     Checking predicates v1.0.8
[INFO] [stderr]     Checking serde_json v1.0.81
[INFO] [stderr]     Checking indicatif v0.16.2
[INFO] [stderr]     Checking escargot v0.4.0
[INFO] [stderr]     Checking rustlings v4.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.46s
[INFO] running `Command { std: "docker" "inspect" "63e27502c774fabfda5006f160711921041f90cd7b987869d547e1b0f60e80be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63e27502c774fabfda5006f160711921041f90cd7b987869d547e1b0f60e80be", kill_on_drop: false }`
[INFO] [stdout] 63e27502c774fabfda5006f160711921041f90cd7b987869d547e1b0f60e80be