[INFO] fetching crate embassy-mock 0.2.1...
[INFO] documenting embassy-mock-0.2.1 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate embassy-mock 0.2.1 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate embassy-mock 0.2.1 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-1-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate embassy-mock 0.2.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate embassy-mock 0.2.1
[INFO] tweaked toml for crates.io crate embassy-mock 0.2.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate embassy-mock 0.2.1 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" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded embassy-futures v0.1.0
[INFO] [stderr]   Downloaded static_cell v1.2.0
[INFO] [stderr]   Downloaded embassy-time v0.1.2
[INFO] [stderr]   Downloaded embassy-executor v0.2.1
[INFO] [stderr]   Downloaded embassy-macros v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3922ee28bc2ad3a7a78e4cf43bbe2551a144048baa084e3f0aab1c1fe7e1bbb9
[INFO] running `Command { std: "docker" "start" "-a" "3922ee28bc2ad3a7a78e4cf43bbe2551a144048baa084e3f0aab1c1fe7e1bbb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3922ee28bc2ad3a7a78e4cf43bbe2551a144048baa084e3f0aab1c1fe7e1bbb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3922ee28bc2ad3a7a78e4cf43bbe2551a144048baa084e3f0aab1c1fe7e1bbb9", kill_on_drop: false }`
[INFO] [stdout] 3922ee28bc2ad3a7a78e4cf43bbe2551a144048baa084e3f0aab1c1fe7e1bbb9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bbbe55863536ba4ff3beeabe324fa6d25eb36325bc607faae6cffc2b826ca7e6
[INFO] running `Command { std: "docker" "start" "-a" "bbbe55863536ba4ff3beeabe324fa6d25eb36325bc607faae6cffc2b826ca7e6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling unicode-ident v1.0.11
[INFO] [stderr]    Compiling semver v1.0.18
[INFO] [stderr]    Compiling futures-task v0.3.28
[INFO] [stderr]    Compiling atomic-polyfill v1.0.3
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]     Checking critical-section v1.1.2
[INFO] [stderr]    Compiling lock_api v0.4.10
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking pin-project-lite v0.2.12
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling embassy-executor v0.2.1
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]     Checking static_cell v1.2.0
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling heapless v0.7.16
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking embassy-time v0.1.2
[INFO] [stderr]    Compiling darling_core v0.13.4
[INFO] [stderr]    Compiling snafu-derive v0.7.5
[INFO] [stderr]    Compiling darling_macro v0.13.4
[INFO] [stderr]    Compiling darling v0.13.4
[INFO] [stderr]    Compiling embassy-macros v0.2.0
[INFO] [stderr]     Checking snafu v0.7.5
[INFO] [stderr]  Documenting embassy-mock v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:9:31
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![cfg_attr(feature = "time", feature(return_position_impl_trait_in_trait))]
[INFO] [stdout]   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `return_position_impl_trait_in_trait` has been stable since `1.75.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `embassy-mock`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.76.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type lib --crate-name embassy_mock src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="executor"' --cfg 'feature="time"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=f536fe6a9de5cc40 -L dependency=/opt/rustwide/target/debug/deps --extern embassy_executor=/opt/rustwide/target/debug/deps/libembassy_executor-de8b12578c2bdefc.rmeta --extern embassy_time=/opt/rustwide/target/debug/deps/libembassy_time-a71b921ab4c52d25.rmeta --extern snafu=/opt/rustwide/target/debug/deps/libsnafu-31c0e9c6d6ad14ca.rmeta --cap-lints=warn --crate-version 0.2.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "bbbe55863536ba4ff3beeabe324fa6d25eb36325bc607faae6cffc2b826ca7e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbbe55863536ba4ff3beeabe324fa6d25eb36325bc607faae6cffc2b826ca7e6", kill_on_drop: false }`
[INFO] [stdout] bbbe55863536ba4ff3beeabe324fa6d25eb36325bc607faae6cffc2b826ca7e6
