[INFO] fetching crate matrix_portal_m4 0.1.2...
[INFO] documenting matrix_portal_m4-0.1.2 against 1.99.0-beta.8 for beta-rustdoc-1.100-2
[INFO] extracting crate matrix_portal_m4 0.1.2 into /workspace/builds/worker-4-tc1/source
[INFO] removed /workspace/builds/worker-4-tc1/source/.cargo/config.toml
[INFO] started tweaking crates.io crate matrix_portal_m4 0.1.2
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate matrix_portal_m4 0.1.2
[INFO] tweaked toml for crates.io crate matrix_portal_m4 0.1.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate matrix_portal_m4 0.1.2 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate matrix_portal_m4 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" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded panic-halt v0.2.0
[INFO] [stderr]   Downloaded cortex-m-rt v0.7.5
[INFO] [stderr]   Downloaded cortex-m v0.7.7
[INFO] [stderr]   Downloaded cortex-m-rt-macros v0.7.5
[INFO] [stderr]   Downloaded vcell v0.1.3
[INFO] [stderr]   Downloaded gcd v2.3.0
[INFO] [stderr]   Downloaded bare-metal v0.2.5
[INFO] [stderr]   Downloaded volatile-register v0.2.2
[INFO] [stderr]   Downloaded nb v0.1.3
[INFO] [stderr]   Downloaded modular-bitfield-impl v0.11.2
[INFO] [stderr]   Downloaded usb-device v0.2.9
[INFO] [stderr]   Downloaded bitfield v0.13.2
[INFO] [stderr]   Downloaded fugit v0.3.7
[INFO] [stderr]   Downloaded embedded-hal v0.2.7
[INFO] [stderr]   Downloaded usb-device v0.3.2
[INFO] [stderr]   Downloaded modular-bitfield v0.11.2
[INFO] [stderr]   Downloaded atsamd-hal v0.16.0
[INFO] [stderr]   Downloaded atsamd51j v0.12.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 52180e5e5031de553153ad0026f4005329e923b5cc50bd76c8074306630296d2
[INFO] running `Command { std: "docker" "start" "52180e5e5031de553153ad0026f4005329e923b5cc50bd76c8074306630296d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "52180e5e5031de553153ad0026f4005329e923b5cc50bd76c8074306630296d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "52180e5e5031de553153ad0026f4005329e923b5cc50bd76c8074306630296d2" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "52180e5e5031de553153ad0026f4005329e923b5cc50bd76c8074306630296d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "52180e5e5031de553153ad0026f4005329e923b5cc50bd76c8074306630296d2" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling cortex-m v0.7.7
[INFO] [stderr]    Compiling cortex-m-rt v0.7.5
[INFO] [stderr]     Checking nb v1.1.0
[INFO] [stderr]    Compiling syn v2.0.100
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling autocfg v1.4.0
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]     Checking critical-section v1.2.0
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]    Compiling atsamd51j v0.12.0
[INFO] [stderr]     Checking gcd v2.3.0
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling seq-macro v0.3.6
[INFO] [stderr]    Compiling matrix_portal_m4 v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking volatile-register v0.2.2
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-hal v0.2.7
[INFO] [stderr]     Checking fugit v0.3.7
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking cipher v0.3.0
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]     Checking aes v0.7.5
[INFO] [stderr]    Compiling modular-bitfield-impl v0.11.2
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.7.5
[INFO] [stderr]     Checking modular-bitfield v0.11.2
[INFO] [stderr]     Checking atsamd-hal v0.16.0
[INFO] [stderr]  Documenting matrix_portal_m4 v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 25.85s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: atsamd-hal v0.16.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 9`
[INFO] [stderr]    Generated /opt/rustwide/target/doc/matrix_portal_m4/index.html
[INFO] running `Command { std: "docker" "inspect" "52180e5e5031de553153ad0026f4005329e923b5cc50bd76c8074306630296d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "RUSTC_BOOTSTRAP=1" "-e" "DOCS_RS=1" "-w" "/opt/rustwide/workdir" "--user" "0:0" "52180e5e5031de553153ad0026f4005329e923b5cc50bd76c8074306630296d2" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "rustdoc" "--lib" "-Zrustdoc-map" "--config" "build.rustdocflags=[\"--cfg\", \"docsrs\", \"-Z\", \"unstable-options\", \"--document-private-items\"]" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.100
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling modular-bitfield-impl v0.11.2
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.7.5
[INFO] [stderr]     Checking modular-bitfield v0.11.2
[INFO] [stderr]     Checking cortex-m-rt v0.7.5
[INFO] [stderr]     Checking atsamd51j v0.12.0
[INFO] [stderr]     Checking atsamd-hal v0.16.0
[INFO] [stderr]  Documenting matrix_portal_m4 v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 24.65s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: atsamd-hal v0.16.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 9`
[INFO] [stderr]    Generated /opt/rustwide/target/doc/matrix_portal_m4/index.html
[INFO] running `Command { std: "docker" "inspect" "52180e5e5031de553153ad0026f4005329e923b5cc50bd76c8074306630296d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52180e5e5031de553153ad0026f4005329e923b5cc50bd76c8074306630296d2", kill_on_drop: false }`
[INFO] [stdout] 52180e5e5031de553153ad0026f4005329e923b5cc50bd76c8074306630296d2