[INFO] fetching crate naja_async_runtime 0.3.4...
[INFO] checking naja_async_runtime-0.3.4 against beta for pr-78714
[INFO] extracting crate naja_async_runtime 0.3.4 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate naja_async_runtime 0.3.4 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-12/source/.cargo/config
[INFO] started tweaking crates.io crate naja_async_runtime 0.3.4
[INFO] finished tweaking crates.io crate naja_async_runtime 0.3.4
[INFO] tweaked toml for crates.io crate naja_async_runtime 0.3.4 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate crates.io crate naja_async_runtime 0.3.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 784bf08c20ebe8a220d52d6013974eafc9122b8d547f1e1999fb96c27b7437d7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "784bf08c20ebe8a220d52d6013974eafc9122b8d547f1e1999fb96c27b7437d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "784bf08c20ebe8a220d52d6013974eafc9122b8d547f1e1999fb96c27b7437d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "784bf08c20ebe8a220d52d6013974eafc9122b8d547f1e1999fb96c27b7437d7", kill_on_drop: false }`
[INFO] [stdout] 784bf08c20ebe8a220d52d6013974eafc9122b8d547f1e1999fb96c27b7437d7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=forbid" "-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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8975748b87b01f842f7202fbfb9ab5244a932d0ab86a9c698273f0209c718383
[INFO] running `Command { std: "docker" "start" "-a" "8975748b87b01f842f7202fbfb9ab5244a932d0ab86a9c698273f0209c718383", kill_on_drop: false }`
[INFO] [stderr]     Checking once_cell v0.2.4
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking backtrace v0.3.38
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking crossbeam v0.7.2
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking juliex v0.3.0-alpha.8
[INFO] [stderr]     Checking naja_async_runtime v0.3.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> examples/threadpool.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![ feature( duration_constants ) ]
[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 `naja_async_runtime`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "8975748b87b01f842f7202fbfb9ab5244a932d0ab86a9c698273f0209c718383", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8975748b87b01f842f7202fbfb9ab5244a932d0ab86a9c698273f0209c718383", kill_on_drop: false }`
[INFO] [stdout] 8975748b87b01f842f7202fbfb9ab5244a932d0ab86a9c698273f0209c718383