[INFO] fetching crate rslab 0.2.1...
[INFO] documenting rslab-0.2.1 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate rslab 0.2.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate rslab 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 rslab 0.2.1
[INFO] finished tweaking crates.io crate rslab 0.2.1
[INFO] tweaked toml for crates.io crate rslab 0.2.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate rslab 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 buddy_system_allocator v0.8.0
[INFO] [stderr]   Downloaded spin v0.7.1
[INFO] [stderr]   Downloaded core_affinity v0.5.10
[INFO] [stderr]   Downloaded volatile v0.4.5
[INFO] [stderr]   Downloaded linked_list_allocator v0.10.4
[INFO] [stderr]   Downloaded preprint v0.1.0
[INFO] [stderr]   Downloaded simple-chunk-allocator v0.1.5
[INFO] [stderr]   Downloaded x86 v0.51.0
[INFO] [stderr]   Downloaded doubly-linked-list 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@sha256:97d61d7686bf65f8ecb15491ab51835e82dc9176a96a831f143a431b191fc501" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 20730f96b020765bbdce1d80e88bde2fdf642be6ad414bba569e96bb698bb1ac
[INFO] running `Command { std: "docker" "start" "-a" "20730f96b020765bbdce1d80e88bde2fdf642be6ad414bba569e96bb698bb1ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "20730f96b020765bbdce1d80e88bde2fdf642be6ad414bba569e96bb698bb1ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20730f96b020765bbdce1d80e88bde2fdf642be6ad414bba569e96bb698bb1ac", kill_on_drop: false }`
[INFO] [stdout] 20730f96b020765bbdce1d80e88bde2fdf642be6ad414bba569e96bb698bb1ac
[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@sha256:97d61d7686bf65f8ecb15491ab51835e82dc9176a96a831f143a431b191fc501" "/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] 89e983bc2e87403b1683df0bb0196050f91ed09db24c117e68a3dae76b92ff69
[INFO] running `Command { std: "docker" "start" "-a" "89e983bc2e87403b1683df0bb0196050f91ed09db24c117e68a3dae76b92ff69", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking volatile v0.4.5
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking preprint v0.1.0
[INFO] [stderr]     Checking doubly-linked-list v0.2.0
[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/doubly-linked-list-0.2.0/src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(core_intrinsics)]
[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 `doubly-linked-list` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "89e983bc2e87403b1683df0bb0196050f91ed09db24c117e68a3dae76b92ff69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89e983bc2e87403b1683df0bb0196050f91ed09db24c117e68a3dae76b92ff69", kill_on_drop: false }`
[INFO] [stdout] 89e983bc2e87403b1683df0bb0196050f91ed09db24c117e68a3dae76b92ff69
