[INFO] fetching crate ryu 1.0.5...
[INFO] checking ryu-1.0.5 against 1.55.0 for beta-1.56-3
[INFO] extracting crate ryu 1.0.5 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ryu 1.0.5 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ryu 1.0.5
[INFO] finished tweaking crates.io crate ryu 1.0.5
[INFO] tweaked toml for crates.io crate ryu 1.0.5 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate ryu 1.0.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", 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] c54308599f7cef7bd006e0495072b3a5420df4ec6190324d57519586465bc631
[INFO] running `Command { std: "docker" "start" "-a" "c54308599f7cef7bd006e0495072b3a5420df4ec6190324d57519586465bc631", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c54308599f7cef7bd006e0495072b3a5420df4ec6190324d57519586465bc631", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c54308599f7cef7bd006e0495072b3a5420df4ec6190324d57519586465bc631", kill_on_drop: false }`
[INFO] [stdout] c54308599f7cef7bd006e0495072b3a5420df4ec6190324d57519586465bc631
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f0b248a8efdf8b77e137db23845d6e46751aef4369eb0207ef1757a4066cab30
[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" "f0b248a8efdf8b77e137db23845d6e46751aef4369eb0207ef1757a4066cab30", kill_on_drop: false }`
[INFO] [stderr]    Compiling ryu v1.0.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking rand_xorshift v0.2.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> benches/bench.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(test)]
[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 `ryu` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f0b248a8efdf8b77e137db23845d6e46751aef4369eb0207ef1757a4066cab30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0b248a8efdf8b77e137db23845d6e46751aef4369eb0207ef1757a4066cab30", kill_on_drop: false }`
[INFO] [stdout] f0b248a8efdf8b77e137db23845d6e46751aef4369eb0207ef1757a4066cab30
