[INFO] fetching crate dots-and-boxes 0.1.0...
[INFO] documenting dots-and-boxes-0.1.0 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate dots-and-boxes 0.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate dots-and-boxes 0.1.0 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dots-and-boxes 0.1.0
[INFO] finished tweaking crates.io crate dots-and-boxes 0.1.0
[INFO] tweaked toml for crates.io crate dots-and-boxes 0.1.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate dots-and-boxes 0.1.0 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" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cmake v0.1.48
[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" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] af66f9a2d5e7e7130b767910bf446939142b88b57e1556763f2e05be1e366dfc
[INFO] running `Command { std: "docker" "start" "-a" "af66f9a2d5e7e7130b767910bf446939142b88b57e1556763f2e05be1e366dfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "af66f9a2d5e7e7130b767910bf446939142b88b57e1556763f2e05be1e366dfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af66f9a2d5e7e7130b767910bf446939142b88b57e1556763f2e05be1e366dfc", kill_on_drop: false }`
[INFO] [stdout] af66f9a2d5e7e7130b767910bf446939142b88b57e1556763f2e05be1e366dfc
[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" "+1.76.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1233b3b7fa7b4ffa476e402a05a96e12a4f69ef4cda930a4198a30054a17ff39
[INFO] running `Command { std: "docker" "start" "-a" "1233b3b7fa7b4ffa476e402a05a96e12a4f69ef4cda930a4198a30054a17ff39", kill_on_drop: false }`
[INFO] [stderr]    Compiling cmake v0.1.48
[INFO] [stderr]    Compiling version-compare v0.1.0
[INFO] [stderr]    Compiling sdl2 v0.35.2
[INFO] [stderr]    Compiling sdl2-sys v0.35.2
[INFO] [stderr]  Documenting dots-and-boxes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(string_remove_matches)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `dots-and-boxes`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.76.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type bin --crate-name dots_and_boxes src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=eacb0e58f16f6468 -L dependency=/opt/rustwide/target/debug/deps --extern sdl2=/opt/rustwide/target/debug/deps/libsdl2-8b7857d7b726061c.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "1233b3b7fa7b4ffa476e402a05a96e12a4f69ef4cda930a4198a30054a17ff39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1233b3b7fa7b4ffa476e402a05a96e12a4f69ef4cda930a4198a30054a17ff39", kill_on_drop: false }`
[INFO] [stdout] 1233b3b7fa7b4ffa476e402a05a96e12a4f69ef4cda930a4198a30054a17ff39
