[INFO] cloning repository https://github.com/chnlkw/generic-session-types
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chnlkw/generic-session-types" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchnlkw%2Fgeneric-session-types", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchnlkw%2Fgeneric-session-types'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 364c96fcd0718a7d5de4be4ed2e61203149daa32
[INFO] documenting chnlkw/generic-session-types against 1.69.0 for beta-1.70-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchnlkw%2Fgeneric-session-types" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chnlkw/generic-session-types 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 git repo https://github.com/chnlkw/generic-session-types
[INFO] finished tweaking git repo https://github.com/chnlkw/generic-session-types
[INFO] tweaked toml for git repo https://github.com/chnlkw/generic-session-types written to /workspace/builds/worker-5-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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 7a5c0d5bfe3bc85b84b60fd8b8637272d4a7324d8a756b011ee8f378417598f7
[INFO] running `Command { std: "docker" "start" "-a" "7a5c0d5bfe3bc85b84b60fd8b8637272d4a7324d8a756b011ee8f378417598f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7a5c0d5bfe3bc85b84b60fd8b8637272d4a7324d8a756b011ee8f378417598f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a5c0d5bfe3bc85b84b60fd8b8637272d4a7324d8a756b011ee8f378417598f7", kill_on_drop: false }`
[INFO] [stdout] 7a5c0d5bfe3bc85b84b60fd8b8637272d4a7324d8a756b011ee8f378417598f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 6545856e12e3eef2d028732f3eb14fddf14b1e91ad91c27bf3815e28b9210c8e
[INFO] running `Command { std: "docker" "start" "-a" "6545856e12e3eef2d028732f3eb14fddf14b1e91ad91c27bf3815e28b9210c8e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.142
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling parking_lot_core v0.9.7
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]    Compiling serde v1.0.160
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking bytes v1.4.0
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling tokio v1.28.0
[INFO] [stderr]    Compiling syn v2.0.15
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking mio v0.8.6
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.40
[INFO] [stderr]  Documenting generic-session-types 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 | #![feature(type_alias_impl_trait)]
[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 `generic-session-types`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name generic_session_types src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=84201f8a96327a4b -L dependency=/opt/rustwide/target/debug/deps --extern serde=/opt/rustwide/target/debug/deps/libserde-b6956e1a4b2bd63a.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-60e137dca47e7fe3.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-47f87b7bc908169e.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-190a21523a8a5552.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "6545856e12e3eef2d028732f3eb14fddf14b1e91ad91c27bf3815e28b9210c8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6545856e12e3eef2d028732f3eb14fddf14b1e91ad91c27bf3815e28b9210c8e", kill_on_drop: false }`
[INFO] [stdout] 6545856e12e3eef2d028732f3eb14fddf14b1e91ad91c27bf3815e28b9210c8e
