[INFO] cloning repository https://github.com/LaurentChion/rust-mdbook-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LaurentChion/rust-mdbook-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLaurentChion%2Frust-mdbook-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLaurentChion%2Frust-mdbook-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 64f026ddbaa7b3e8710bb4e2a0465dead510c6ea
[INFO] checking LaurentChion/rust-mdbook-playground against try#ce3348c21531b911ca5aadbbbe7ad63a1bc4c382 for pr-149596
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLaurentChion%2Frust-mdbook-playground" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/LaurentChion/rust-mdbook-playground
[INFO] finished tweaking git repo https://github.com/LaurentChion/rust-mdbook-playground
[INFO] tweaked toml for git repo https://github.com/LaurentChion/rust-mdbook-playground written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/LaurentChion/rust-mdbook-playground on toolchain ce3348c21531b911ca5aadbbbe7ad63a1bc4c382
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ce3348c21531b911ca5aadbbbe7ad63a1bc4c382" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/LaurentChion/rust-mdbook-playground 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" "+ce3348c21531b911ca5aadbbbe7ad63a1bc4c382" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+ce3348c21531b911ca5aadbbbe7ad63a1bc4c382" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cf39c80b85284c5ef38e3df34237bd1948c7da2a48396676aa41a27f24c4d12d
[INFO] running `Command { std: "docker" "start" "-a" "cf39c80b85284c5ef38e3df34237bd1948c7da2a48396676aa41a27f24c4d12d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cf39c80b85284c5ef38e3df34237bd1948c7da2a48396676aa41a27f24c4d12d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf39c80b85284c5ef38e3df34237bd1948c7da2a48396676aa41a27f24c4d12d", kill_on_drop: false }`
[INFO] [stdout] cf39c80b85284c5ef38e3df34237bd1948c7da2a48396676aa41a27f24c4d12d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+ce3348c21531b911ca5aadbbbe7ad63a1bc4c382" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8467ab3f6a8fd2a3c1c4e2767afd8448495b047c7042054a1fcfc26da9d80bfa
[INFO] running `Command { std: "docker" "start" "-a" "8467ab3f6a8fd2a3c1c4e2767afd8448495b047c7042054a1fcfc26da9d80bfa", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking rust-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.61s
[INFO] running `Command { std: "docker" "inspect" "8467ab3f6a8fd2a3c1c4e2767afd8448495b047c7042054a1fcfc26da9d80bfa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8467ab3f6a8fd2a3c1c4e2767afd8448495b047c7042054a1fcfc26da9d80bfa", kill_on_drop: false }`
[INFO] [stdout] 8467ab3f6a8fd2a3c1c4e2767afd8448495b047c7042054a1fcfc26da9d80bfa