[INFO] fetching crate blues-notecard 0.3.1...
[INFO] documenting blues-notecard-0.3.1 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate blues-notecard 0.3.1 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate blues-notecard 0.3.1 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate blues-notecard 0.3.1
[INFO] finished tweaking crates.io crate blues-notecard 0.3.1
[INFO] tweaked toml for crates.io crate blues-notecard 0.3.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded atomic-polyfill v1.0.3
[INFO] [stderr]   Downloaded defmt v0.3.5
[INFO] [stderr]   Downloaded defmt-macros v0.3.6
[INFO] [stderr]   Downloaded ufmt-write v0.1.0
[INFO] [stderr]   Downloaded serde-json-core v0.4.0
[INFO] [stderr]   Downloaded heapless v0.7.17
[INFO] [stderr]   Downloaded defmt-parser v0.3.3
[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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 27b06cbcaedec0a57a0c384e9027cb485866548e06106015c6ed964c3c49505a
[INFO] running `Command { std: "docker" "start" "-a" "27b06cbcaedec0a57a0c384e9027cb485866548e06106015c6ed964c3c49505a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "27b06cbcaedec0a57a0c384e9027cb485866548e06106015c6ed964c3c49505a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27b06cbcaedec0a57a0c384e9027cb485866548e06106015c6ed964c3c49505a", kill_on_drop: false }`
[INFO] [stdout] 27b06cbcaedec0a57a0c384e9027cb485866548e06106015c6ed964c3c49505a
[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" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 840d2b1e3754c57330d35041e45c5bc110c2be35d120b69bab9f748576b58f3c
[INFO] running `Command { std: "docker" "start" "-a" "840d2b1e3754c57330d35041e45c5bc110c2be35d120b69bab9f748576b58f3c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling thiserror v1.0.56
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling defmt-macros v0.3.6
[INFO] [stderr]    Compiling defmt v0.3.5
[INFO] [stderr]    Compiling serde v1.0.195
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking ufmt-write v0.1.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]    Compiling heapless v0.7.17
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling thiserror-impl v1.0.56
[INFO] [stderr]    Compiling serde_derive v1.0.195
[INFO] [stderr]    Compiling defmt-parser v0.3.3
[INFO] [stderr]     Checking serde-json-core v0.4.0
[INFO] [stderr]  Documenting blues-notecard v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(split_array)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(type_changing_struct_update)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `blues-notecard`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type lib --crate-name blues_notecard 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=8fdd6d326f5a4c30 -L dependency=/opt/rustwide/target/debug/deps --extern defmt=/opt/rustwide/target/debug/deps/libdefmt-ae3a0f13ab15bafe.rmeta --extern embedded_hal=/opt/rustwide/target/debug/deps/libembedded_hal-c530098c9feb8635.rmeta --extern heapless=/opt/rustwide/target/debug/deps/libheapless-999e3bbdc9cf3a33.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-9479b1c1d18cf438.rmeta --extern serde_json_core=/opt/rustwide/target/debug/deps/libserde_json_core-1bc3e381536ff3ca.rmeta --cap-lints=warn --crate-version 0.3.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "840d2b1e3754c57330d35041e45c5bc110c2be35d120b69bab9f748576b58f3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "840d2b1e3754c57330d35041e45c5bc110c2be35d120b69bab9f748576b58f3c", kill_on_drop: false }`
[INFO] [stdout] 840d2b1e3754c57330d35041e45c5bc110c2be35d120b69bab9f748576b58f3c
