[INFO] fetching crate einsum-codegen 0.1.0...
[INFO] documenting einsum-codegen-0.1.0 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate einsum-codegen 0.1.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate einsum-codegen 0.1.0 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate einsum-codegen 0.1.0
[INFO] finished tweaking crates.io crate einsum-codegen 0.1.0
[INFO] tweaked toml for crates.io crate einsum-codegen 0.1.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+1.69.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded katexit v0.1.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8498e9476834bb11c3bfd2cbb43379bea7bb4c1a21107f6245774a769f2232fa
[INFO] running `Command { std: "docker" "start" "-a" "8498e9476834bb11c3bfd2cbb43379bea7bb4c1a21107f6245774a769f2232fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8498e9476834bb11c3bfd2cbb43379bea7bb4c1a21107f6245774a769f2232fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8498e9476834bb11c3bfd2cbb43379bea7bb4c1a21107f6245774a769f2232fa", kill_on_drop: false }`
[INFO] [stdout] 8498e9476834bb11c3bfd2cbb43379bea7bb4c1a21107f6245774a769f2232fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0e43a8dd3986ede68175422ae222d63cb1b4414db751527fa79a0d3810411164
[INFO] running `Command { std: "docker" "start" "-a" "0e43a8dd3986ede68175422ae222d63cb1b4414db751527fa79a0d3810411164", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling anyhow v1.0.71
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]    Compiling katexit v0.1.4
[INFO] [stderr]  Documenting einsum-codegen v0.1.0 (/opt/rustwide/workdir)
[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   | / #![cfg_attr(
[INFO] [stdout] 2   | |     doc,
[INFO] [stdout] 3   | |     feature(prelude_import, custom_inner_attributes, proc_macro_hygiene)
[INFO] [stdout] 4   | | )]
[INFO] [stdout] ...   |
[INFO] [stdout] 167 | | pub use path::*;
[INFO] [stdout] 168 | | pub use subscripts::*;
[INFO] [stdout]     | |______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 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 `einsum-codegen`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name einsum_codegen src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=867ede22e6e2fbdf -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-3570d1a0a25354c2.rmeta --extern katexit=/opt/rustwide/target/debug/deps/libkatexit-39f3cdbc1df2b843.so --extern nom=/opt/rustwide/target/debug/deps/libnom-ea0c56b64d31b3e5.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-a4e671e7fcb6e2fd.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-3c5df073fef2eea2.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-6e315f525cf20243.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "0e43a8dd3986ede68175422ae222d63cb1b4414db751527fa79a0d3810411164", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e43a8dd3986ede68175422ae222d63cb1b4414db751527fa79a0d3810411164", kill_on_drop: false }`
[INFO] [stdout] 0e43a8dd3986ede68175422ae222d63cb1b4414db751527fa79a0d3810411164
