[INFO] fetching crate oasis-cbor-derive 0.1.5...
[INFO] documenting oasis-cbor-derive-0.1.5 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate oasis-cbor-derive 0.1.5 into /workspace/builds/worker-16/source
[INFO] validating manifest of crates.io crate oasis-cbor-derive 0.1.5 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate oasis-cbor-derive 0.1.5
[INFO] finished tweaking crates.io crate oasis-cbor-derive 0.1.5
[INFO] tweaked toml for crates.io crate oasis-cbor-derive 0.1.5 written to /workspace/builds/worker-16/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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" "+beta-2021-08-01" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded sk-cbor v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4059ab9145691c4947bf9d5eb642ccbc484dd063600da01b0c4e03bb2f4d278b
[INFO] running `Command { std: "docker" "start" "-a" "4059ab9145691c4947bf9d5eb642ccbc484dd063600da01b0c4e03bb2f4d278b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4059ab9145691c4947bf9d5eb642ccbc484dd063600da01b0c4e03bb2f4d278b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4059ab9145691c4947bf9d5eb642ccbc484dd063600da01b0c4e03bb2f4d278b", kill_on_drop: false }`
[INFO] [stdout] 4059ab9145691c4947bf9d5eb642ccbc484dd063600da01b0c4e03bb2f4d278b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f780bf0b3c2219c5194038591a96b4d162b3799d6c80c20ae542815bfedc8df7
[INFO] running `Command { std: "docker" "start" "-a" "f780bf0b3c2219c5194038591a96b4d162b3799d6c80c20ae542815bfedc8df7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]     Checking sk-cbor v0.1.2
[INFO] [stderr]     Checking proc-macro2 v1.0.28
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]     Checking darling_core v0.13.0
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]    Compiling darling_macro v0.13.0
[INFO] [stderr]     Checking thiserror v1.0.26
[INFO] [stderr]     Checking darling v0.13.0
[INFO] [stderr]     Checking proc-macro-crate v1.0.0
[INFO] [stderr]  Documenting oasis-cbor-derive v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_diagnostic)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(bool_to_option)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `oasis-cbor-derive`
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type proc-macro --crate-name oasis_cbor_derive 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 darling=/opt/rustwide/target/debug/deps/libdarling-a384cca886c477c6.rmeta --extern proc_macro_crate=/opt/rustwide/target/debug/deps/libproc_macro_crate-f66669550215226f.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-c395b40247ac8d91.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-901816f2d165e43f.rmeta --extern sk_cbor=/opt/rustwide/target/debug/deps/libsk_cbor-ff4e550c285754ca.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-2cba68b57452dd4f.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.1.5` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "f780bf0b3c2219c5194038591a96b4d162b3799d6c80c20ae542815bfedc8df7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f780bf0b3c2219c5194038591a96b4d162b3799d6c80c20ae542815bfedc8df7", kill_on_drop: false }`
[INFO] [stdout] f780bf0b3c2219c5194038591a96b4d162b3799d6c80c20ae542815bfedc8df7
