[INFO] fetching crate mdbook-post 0.1.2...
[INFO] documenting mdbook-post-0.1.2 against 1.71.0 for beta-1.72-rustdoc-1
[INFO] extracting crate mdbook-post 0.1.2 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate mdbook-post 0.1.2 on toolchain 1.71.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.71.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mdbook-post 0.1.2
[INFO] finished tweaking crates.io crate mdbook-post 0.1.2
[INFO] tweaked toml for crates.io crate mdbook-post 0.1.2 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate mdbook-post 0.1.2 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" "+1.71.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr] warning: spurious network error (3 tries remaining): failed to get successful HTTP response from `https://static.crates.io/crates/doe/doe-0.1.64.crate` (151.101.2.137), got 502
[INFO] [stderr] body:
[INFO] [stderr] I/O error
[INFO] [stderr] warning: spurious network error (3 tries remaining): failed to get successful HTTP response from `https://static.crates.io/crates/serde-transcode/serde-transcode-1.1.1.crate` (151.101.2.137), got 502
[INFO] [stderr] body:
[INFO] [stderr] I/O error
[INFO] [stderr] warning: spurious network error (3 tries remaining): failed to get successful HTTP response from `https://static.crates.io/crates/tsu/tsu-1.0.1.crate` (151.101.2.137), got 502
[INFO] [stderr] body:
[INFO] [stderr] I/O error
[INFO] [stderr]   Downloaded doe v0.1.64
[INFO] [stderr]   Downloaded tsu v1.0.1
[INFO] [stderr]   Downloaded serde-transcode v1.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:5c16f4e6c37141f9fef0bc86f7a492d732943053e42aab8461035881e3f53823" "/opt/rustwide/cargo-home/bin/cargo" "+1.71.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 74397b8b43f7950471c250f4fadad6045d46400926d65553244fb2600cd5b109
[INFO] running `Command { std: "docker" "start" "-a" "74397b8b43f7950471c250f4fadad6045d46400926d65553244fb2600cd5b109", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "74397b8b43f7950471c250f4fadad6045d46400926d65553244fb2600cd5b109", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74397b8b43f7950471c250f4fadad6045d46400926d65553244fb2600cd5b109", kill_on_drop: false }`
[INFO] [stdout] 74397b8b43f7950471c250f4fadad6045d46400926d65553244fb2600cd5b109
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:5c16f4e6c37141f9fef0bc86f7a492d732943053e42aab8461035881e3f53823" "/opt/rustwide/cargo-home/bin/cargo" "+1.71.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d53db409f7debe63d2a89ae58c8c8bc64ab54de00df67d7bde6d44fb2109ccd1
[INFO] running `Command { std: "docker" "start" "-a" "d53db409f7debe63d2a89ae58c8c8bc64ab54de00df67d7bde6d44fb2109ccd1", kill_on_drop: false }`
[INFO] [stderr] error: package `mdbook-post v0.1.2 (/opt/rustwide/workdir)` cannot be built because it requires rustc 1.72 or newer, while the currently active rustc version is 1.71.0
[INFO] [stderr] 
[INFO] running `Command { std: "docker" "inspect" "d53db409f7debe63d2a89ae58c8c8bc64ab54de00df67d7bde6d44fb2109ccd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d53db409f7debe63d2a89ae58c8c8bc64ab54de00df67d7bde6d44fb2109ccd1", kill_on_drop: false }`
[INFO] [stdout] d53db409f7debe63d2a89ae58c8c8bc64ab54de00df67d7bde6d44fb2109ccd1