[INFO] fetching crate embedded-executor 0.6.1...
[INFO] testing embedded-executor-0.6.1 against 1.69.0 for beta-1.70-1
[INFO] extracting crate embedded-executor 0.6.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate embedded-executor 0.6.1 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 embedded-executor 0.6.1
[INFO] finished tweaking crates.io crate embedded-executor 0.6.1
[INFO] tweaked toml for crates.io crate embedded-executor 0.6.1 written to /workspace/builds/worker-4-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 generational-arena v0.2.8
[INFO] [stderr]   Downloaded alloc-facade v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 63d9996e11c3e7bd4e7f4c797e27f22d562a8e4f2ce7b4e3395c76608eacdc59
[INFO] running `Command { std: "docker" "start" "-a" "63d9996e11c3e7bd4e7f4c797e27f22d562a8e4f2ce7b4e3395c76608eacdc59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "63d9996e11c3e7bd4e7f4c797e27f22d562a8e4f2ce7b4e3395c76608eacdc59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63d9996e11c3e7bd4e7f4c797e27f22d562a8e4f2ce7b4e3395c76608eacdc59", kill_on_drop: false }`
[INFO] [stdout] 63d9996e11c3e7bd4e7f4c797e27f22d562a8e4f2ce7b4e3395c76608eacdc59
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9ccd1660d5095363f8dec2a15808c99587cb26fc34efe20cf7377ed0828af82e
[INFO] running `Command { std: "docker" "start" "-a" "9ccd1660d5095363f8dec2a15808c99587cb26fc34efe20cf7377ed0828af82e", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]    Compiling futures-sink v0.3.28
[INFO] [stderr]    Compiling futures-io v0.3.28
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling generational-arena v0.2.8
[INFO] [stderr]    Compiling alloc-facade v0.5.0
[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/generational-arena-0.2.8/src/lib.rs:146:43
[INFO] [stdout]     |
[INFO] [stdout] 146 | #![cfg_attr(not(feature = "std"), feature(alloc))]
[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 `generational-arena` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "9ccd1660d5095363f8dec2a15808c99587cb26fc34efe20cf7377ed0828af82e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ccd1660d5095363f8dec2a15808c99587cb26fc34efe20cf7377ed0828af82e", kill_on_drop: false }`
[INFO] [stdout] 9ccd1660d5095363f8dec2a15808c99587cb26fc34efe20cf7377ed0828af82e
