[INFO] fetching crate oasis-cbor-derive 0.1.5...
[INFO] documenting oasis-cbor-derive-0.1.5 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate oasis-cbor-derive 0.1.5 into /workspace/builds/worker-113/source
[INFO] validating manifest of crates.io crate oasis-cbor-derive 0.1.5 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 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-113/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-113/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/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] 4aaa2f47c09751ac537b19f2794a3c14d01ca2596e585509157382df4ee09fad
[INFO] running `Command { std: "docker" "start" "-a" "4aaa2f47c09751ac537b19f2794a3c14d01ca2596e585509157382df4ee09fad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4aaa2f47c09751ac537b19f2794a3c14d01ca2596e585509157382df4ee09fad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4aaa2f47c09751ac537b19f2794a3c14d01ca2596e585509157382df4ee09fad", kill_on_drop: false }`
[INFO] [stdout] 4aaa2f47c09751ac537b19f2794a3c14d01ca2596e585509157382df4ee09fad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/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] a504104c83417a4f5672e7948be8cf7bfb8cea91fb1f4476eee1adb1c6076b19
[INFO] running `Command { std: "docker" "start" "-a" "a504104c83417a4f5672e7948be8cf7bfb8cea91fb1f4476eee1adb1c6076b19", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]     Checking unicode-xid v0.2.2
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]     Checking sk-cbor v0.1.2
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking proc-macro2 v1.0.28
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]     Checking darling_core v0.13.0
[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] [stderr] error: could not document `oasis-cbor-derive`
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable 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] [stderr] 
[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(bool_to_option)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[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-a89cea2c801a6546.rmeta --extern proc_macro_crate=/opt/rustwide/target/debug/deps/libproc_macro_crate-e53385453fdb71df.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-664abb91e2bdc317.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-dc7cbb122f009b6c.rmeta --extern sk_cbor=/opt/rustwide/target/debug/deps/libsk_cbor-14e267d22b2748c9.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-63f4f0fb77efda36.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.1.5` (exit status: 1)
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a504104c83417a4f5672e7948be8cf7bfb8cea91fb1f4476eee1adb1c6076b19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a504104c83417a4f5672e7948be8cf7bfb8cea91fb1f4476eee1adb1c6076b19", kill_on_drop: false }`
[INFO] [stdout] a504104c83417a4f5672e7948be8cf7bfb8cea91fb1f4476eee1adb1c6076b19
