[INFO] fetching crate brewdrivers 0.9.0...
[INFO] documenting brewdrivers-0.9.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate brewdrivers 0.9.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate brewdrivers 0.9.0 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate brewdrivers 0.9.0
[INFO] finished tweaking crates.io crate brewdrivers 0.9.0
[INFO] tweaked toml for crates.io crate brewdrivers 0.9.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate brewdrivers 0.9.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serial_test_derive v0.4.0
[INFO] [stderr]   Downloaded tokio-serial v4.3.3
[INFO] [stderr]   Downloaded serial_test v0.4.0
[INFO] [stderr]   Downloaded tokio-modbus v0.4.0
[INFO] [stderr]   Downloaded mio-serial v3.3.0
[INFO] [stderr]   Downloaded serialport v3.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] fddb3fa003a972b9a9eebc4a3ba3e24693ad58d71e64894cf08b1cb95ed92ad2
[INFO] running `Command { std: "docker" "start" "-a" "fddb3fa003a972b9a9eebc4a3ba3e24693ad58d71e64894cf08b1cb95ed92ad2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fddb3fa003a972b9a9eebc4a3ba3e24693ad58d71e64894cf08b1cb95ed92ad2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fddb3fa003a972b9a9eebc4a3ba3e24693ad58d71e64894cf08b1cb95ed92ad2", kill_on_drop: false }`
[INFO] [stdout] fddb3fa003a972b9a9eebc4a3ba3e24693ad58d71e64894cf08b1cb95ed92ad2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7a257355c78298e42c7628405d569119d9aa9c894f348d17c65f8fa3b9f2dd3b
[INFO] running `Command { std: "docker" "start" "-a" "7a257355c78298e42c7628405d569119d9aa9c894f348d17c65f8fa3b9f2dd3b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.84
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]     Checking futures-core v0.3.12
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking futures-sink v0.3.12
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking pin-project-lite v0.1.11
[INFO] [stderr]     Checking futures-io v0.3.12
[INFO] [stderr]     Checking pin-project-lite v0.2.4
[INFO] [stderr]    Compiling nix v0.16.1
[INFO] [stderr]     Checking crc-catalog v1.1.1
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]     Checking crc v2.0.0
[INFO] [stderr]     Checking futures-channel v0.3.12
[INFO] [stderr]     Checking futures-task v0.3.12
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking signal-hook-registry v1.3.0
[INFO] [stderr]     Checking libudev v0.2.0
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stderr]    Compiling futures-macro v0.3.12
[INFO] [stderr]     Checking serialport v3.3.0
[INFO] [stderr]     Checking mio-serial v3.3.0
[INFO] [stderr]     Checking serialport v4.0.0
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking futures-util v0.3.12
[INFO] [stderr]     Checking futures-executor v0.3.12
[INFO] [stderr]     Checking futures v0.3.12
[INFO] [stderr]     Checking tokio-serial v4.3.3
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking tokio-modbus v0.4.0
[INFO] [stderr]  Documenting brewdrivers v0.9.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![feature(result_copied)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `self::relays::str1`
[INFO] [stdout]  --> src/relays/mod.rs:4:19
[INFO] [stdout]   |
[INFO] [stdout] 4 | //!  * [`STR1XX`](crate::relays::str1)
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^^^^^^ no item named `str1` in module `relays`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `self::relays::str1::STR1`
[INFO] [stdout]   --> src/relays/str1/str1.rs:13:29
[INFO] [stdout]    |
[INFO] [stdout] 13 | //! See the [`STR1` struct](crate::relays::str1::STR1) or the `str1` example in the
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^ no item named `str1` in module `relays`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `self::relays::str1`
[INFO] [stdout]  --> src/relays/str1/bytestring.rs:1:51
[INFO] [stdout]   |
[INFO] [stdout] 1 | //! A `Bytestring`, which is used in the [`str1`](crate::relays::str1) module.
[INFO] [stdout]   |                                                   ^^^^^^^^^^^^^^^^^^^ no item named `str1` in module `relays`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `self::relays::bytestring`
[INFO] [stdout]   --> src/relays/str1/bytestring.rs:68:24
[INFO] [stdout]    |
[INFO] [stdout] 68 | /// The [`Bytestring`](crate::relays::bytestring) struct, representing a message to the STR1XX board.
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^ no item named `bytestring` in module `relays`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `brewdrivers`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name brewdrivers src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=b673fc69e2f5534b -L dependency=/opt/rustwide/target/debug/deps --extern crc=/opt/rustwide/target/debug/deps/libcrc-7075e7b6c90e3a7f.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-2e8f15cb095b3154.rmeta --extern hex=/opt/rustwide/target/debug/deps/libhex-6675fd61bc3ec9fe.rmeta --extern serialport=/opt/rustwide/target/debug/deps/libserialport-0d74cd1ef607d53b.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-0dad854d6c0a1bf6.rmeta --extern tokio_modbus=/opt/rustwide/target/debug/deps/libtokio_modbus-03c00ebb1aa79dce.rmeta --extern tokio_serial=/opt/rustwide/target/debug/deps/libtokio_serial-761ea4714688b0d7.rmeta --cap-lints=warn --crate-version 0.9.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "7a257355c78298e42c7628405d569119d9aa9c894f348d17c65f8fa3b9f2dd3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a257355c78298e42c7628405d569119d9aa9c894f348d17c65f8fa3b9f2dd3b", kill_on_drop: false }`
[INFO] [stdout] 7a257355c78298e42c7628405d569119d9aa9c894f348d17c65f8fa3b9f2dd3b