[INFO] fetching crate automatic-relations 0.2.1...
[INFO] documenting automatic-relations-0.2.1 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate automatic-relations 0.2.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate automatic-relations 0.2.1 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 automatic-relations 0.2.1
[INFO] finished tweaking crates.io crate automatic-relations 0.2.1
[INFO] tweaked toml for crates.io crate automatic-relations 0.2.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate automatic-relations 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" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ppv-lite86 v0.2.9
[INFO] [stderr]   Downloaded getrandom v0.1.14
[INFO] [stderr]   Downloaded libc v0.2.76
[INFO] [stderr]   Downloaded immutable-map v0.1.2
[INFO] [stderr]   Downloaded union-find v0.3.2
[INFO] [stderr]   Downloaded crossbeam-channel v0.4.3
[INFO] [stderr]   Downloaded tree-automata v0.1.2
[INFO] [stderr]   Downloaded terms v0.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 24c8bc496006f0ab11679f9b11bdf10ee9db1a8cac8341b5a81dac1438b7d2a2
[INFO] running `Command { std: "docker" "start" "-a" "24c8bc496006f0ab11679f9b11bdf10ee9db1a8cac8341b5a81dac1438b7d2a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "24c8bc496006f0ab11679f9b11bdf10ee9db1a8cac8341b5a81dac1438b7d2a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24c8bc496006f0ab11679f9b11bdf10ee9db1a8cac8341b5a81dac1438b7d2a2", kill_on_drop: false }`
[INFO] [stdout] 24c8bc496006f0ab11679f9b11bdf10ee9db1a8cac8341b5a81dac1438b7d2a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] a6b2757172528c380ef6a05215755ac29cf3d7583e628f528d99f9d22e4e8e33
[INFO] running `Command { std: "docker" "start" "-a" "a6b2757172528c380ef6a05215755ac29cf3d7583e628f528d99f9d22e4e8e33", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]     Checking once_cell v1.4.1
[INFO] [stderr]     Checking union-find v0.3.2
[INFO] [stderr]     Checking immutable-map v0.1.2
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking crossbeam-channel v0.4.3
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking terms v0.1.3
[INFO] [stderr]     Checking tree-automata 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/tree-automata-0.1.2/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(trait_alias)]
[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 `tree-automata` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "a6b2757172528c380ef6a05215755ac29cf3d7583e628f528d99f9d22e4e8e33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6b2757172528c380ef6a05215755ac29cf3d7583e628f528d99f9d22e4e8e33", kill_on_drop: false }`
[INFO] [stdout] a6b2757172528c380ef6a05215755ac29cf3d7583e628f528d99f9d22e4e8e33
