[INFO] fetching crate kf-protocol-api 2.0.0...
[INFO] documenting kf-protocol-api-2.0.0 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate kf-protocol-api 2.0.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate kf-protocol-api 2.0.0 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 kf-protocol-api 2.0.0
[INFO] finished tweaking crates.io crate kf-protocol-api 2.0.0
[INFO] tweaked toml for crates.io crate kf-protocol-api 2.0.0 written to /workspace/builds/worker-7-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 kf-protocol-core v0.1.2
[INFO] [stderr]   Downloaded flv-util v0.4.0
[INFO] [stderr]   Downloaded kf-protocol-derive v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 6b6c1d3aa3a842d195ba42399e85381dac388a3bbc55aa4d213dd55d513c6206
[INFO] running `Command { std: "docker" "start" "-a" "6b6c1d3aa3a842d195ba42399e85381dac388a3bbc55aa4d213dd55d513c6206", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b6c1d3aa3a842d195ba42399e85381dac388a3bbc55aa4d213dd55d513c6206", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b6c1d3aa3a842d195ba42399e85381dac388a3bbc55aa4d213dd55d513c6206", kill_on_drop: false }`
[INFO] [stdout] 6b6c1d3aa3a842d195ba42399e85381dac388a3bbc55aa4d213dd55d513c6206
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] d1aa3f73c283b1233e5ffee9c99faeacf93bf6281369f70574531fd95ea70c2d
[INFO] running `Command { std: "docker" "start" "-a" "d1aa3f73c283b1233e5ffee9c99faeacf93bf6281369f70574531fd95ea70c2d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling serde_derive v1.0.160
[INFO] [stderr]     Checking once_cell v1.17.1
[INFO] [stderr]    Compiling serde v1.0.160
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]    Compiling proc-macro-hack v0.5.20+deprecated
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking regex-syntax v0.7.1
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]     Checking iana-time-zone v0.1.56
[INFO] [stderr]     Checking tracing-core v0.1.30
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking thread_local v1.1.7
[INFO] [stderr]     Checking sharded-slab v0.1.4
[INFO] [stderr]    Compiling crc32c v0.5.0
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking tracing-log v0.1.3
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking content_inspector v0.2.4
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking regex v1.8.1
[INFO] [stderr]    Compiling syn v2.0.15
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking paste v0.1.18
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking chrono v0.4.24
[INFO] [stderr]    Compiling kf-protocol-derive v0.2.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.24
[INFO] [stderr]     Checking tracing v0.1.37
[INFO] [stderr]     Checking tracing-serde v0.1.3
[INFO] [stderr]     Checking kf-protocol-core v0.1.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/kf-protocol-core-0.1.2/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(specialization)]
[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 compile `kf-protocol-core` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "d1aa3f73c283b1233e5ffee9c99faeacf93bf6281369f70574531fd95ea70c2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1aa3f73c283b1233e5ffee9c99faeacf93bf6281369f70574531fd95ea70c2d", kill_on_drop: false }`
[INFO] [stdout] d1aa3f73c283b1233e5ffee9c99faeacf93bf6281369f70574531fd95ea70c2d
