[INFO] fetching crate mars_vga 0.0.2...
[INFO] documenting mars_vga-0.0.2 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate mars_vga 0.0.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate mars_vga 0.0.2 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mars_vga 0.0.2
[INFO] finished tweaking crates.io crate mars_vga 0.0.2
[INFO] tweaked toml for crates.io crate mars_vga 0.0.2 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ef24d33a34e2feab26f996d4cc6f3d8b603893f5cd686611bda35394e77bc3c1
[INFO] running `Command { std: "docker" "start" "-a" "ef24d33a34e2feab26f996d4cc6f3d8b603893f5cd686611bda35394e77bc3c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef24d33a34e2feab26f996d4cc6f3d8b603893f5cd686611bda35394e77bc3c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef24d33a34e2feab26f996d4cc6f3d8b603893f5cd686611bda35394e77bc3c1", kill_on_drop: false }`
[INFO] [stdout] ef24d33a34e2feab26f996d4cc6f3d8b603893f5cd686611bda35394e77bc3c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8dae00a7d284156ab7c22703e42bb3d70d42149e14861187919fde25ece0927b
[INFO] running `Command { std: "docker" "start" "-a" "8dae00a7d284156ab7c22703e42bb3d70d42149e14861187919fde25ece0927b", kill_on_drop: false }`
[INFO] [stderr]     Checking volatile v0.2.7
[INFO] [stderr]  Documenting mars_vga v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(ptr_internals)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `mars_vga`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name mars_vga src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern spin=/opt/rustwide/target/debug/deps/libspin-cfe38c95c23dbc87.rmeta --extern volatile=/opt/rustwide/target/debug/deps/libvolatile-6c7165e26af2bd0d.rmeta --cap-lints=warn --crate-version 0.0.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "8dae00a7d284156ab7c22703e42bb3d70d42149e14861187919fde25ece0927b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8dae00a7d284156ab7c22703e42bb3d70d42149e14861187919fde25ece0927b", kill_on_drop: false }`
[INFO] [stdout] 8dae00a7d284156ab7c22703e42bb3d70d42149e14861187919fde25ece0927b
