[INFO] cloning repository https://github.com/abitofhelp/prost_example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/abitofhelp/prost_example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fabitofhelp%2Fprost_example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fabitofhelp%2Fprost_example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 80ea365f6e7bc6f784fe3cc219cbbec8ae0a89b5
[INFO] documenting abitofhelp/prost_example against 1.75.0 for beta-1.76-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fabitofhelp%2Fprost_example" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/abitofhelp/prost_example on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/abitofhelp/prost_example
[INFO] finished tweaking git repo https://github.com/abitofhelp/prost_example
[INFO] tweaked toml for git repo https://github.com/abitofhelp/prost_example written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/abitofhelp/prost_example 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 104726ecf3ebe5639c055f78c2c651b31789574fac8d10f701063686dca1984a
[INFO] running `Command { std: "docker" "start" "-a" "104726ecf3ebe5639c055f78c2c651b31789574fac8d10f701063686dca1984a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "104726ecf3ebe5639c055f78c2c651b31789574fac8d10f701063686dca1984a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "104726ecf3ebe5639c055f78c2c651b31789574fac8d10f701063686dca1984a", kill_on_drop: false }`
[INFO] [stdout] 104726ecf3ebe5639c055f78c2c651b31789574fac8d10f701063686dca1984a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 822c1f3c6e5d1db386004a793b152070c6dd681cd527aebca0ba38e97de58b17
[INFO] running `Command { std: "docker" "start" "-a" "822c1f3c6e5d1db386004a793b152070c6dd681cd527aebca0ba38e97de58b17", kill_on_drop: false }`
[INFO] [stderr] error: package `prost_example v1.0.0 (/opt/rustwide/workdir)` cannot be built because it requires rustc 1.76 or newer, while the currently active rustc version is 1.75.0
[INFO] [stderr] 
[INFO] running `Command { std: "docker" "inspect" "822c1f3c6e5d1db386004a793b152070c6dd681cd527aebca0ba38e97de58b17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "822c1f3c6e5d1db386004a793b152070c6dd681cd527aebca0ba38e97de58b17", kill_on_drop: false }`
[INFO] [stdout] 822c1f3c6e5d1db386004a793b152070c6dd681cd527aebca0ba38e97de58b17
