[INFO] fetching crate muta-keypair 0.1.0-alpha.1...
[INFO] checking muta-keypair-0.1.0-alpha.1 against beta for pr-78714
[INFO] extracting crate muta-keypair 0.1.0-alpha.1 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate muta-keypair 0.1.0-alpha.1 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate muta-keypair 0.1.0-alpha.1
[INFO] finished tweaking crates.io crate muta-keypair 0.1.0-alpha.1
[INFO] tweaked toml for crates.io crate muta-keypair 0.1.0-alpha.1 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate crates.io crate muta-keypair 0.1.0-alpha.1 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] a476289b8ed7c862c83f64f012e44d26df37fd65ac38627c9c510eb1bd5517e0
[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" "a476289b8ed7c862c83f64f012e44d26df37fd65ac38627c9c510eb1bd5517e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a476289b8ed7c862c83f64f012e44d26df37fd65ac38627c9c510eb1bd5517e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a476289b8ed7c862c83f64f012e44d26df37fd65ac38627c9c510eb1bd5517e0", kill_on_drop: false }`
[INFO] [stdout] a476289b8ed7c862c83f64f012e44d26df37fd65ac38627c9c510eb1bd5517e0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] [stdout] 1b37271995243c83dfbcc888804a0b9bc5d0d8d279ee21fbe4ec03bcaa393730
[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" "1b37271995243c83dfbcc888804a0b9bc5d0d8d279ee21fbe4ec03bcaa393730", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.13
[INFO] [stderr]    Compiling crunchy v0.1.6
[INFO] [stderr]     Checking futures-sink v0.3.1
[INFO] [stderr]     Checking futures-core v0.3.1
[INFO] [stderr]     Checking miracl_amcl v3.2.5
[INFO] [stderr]     Checking futures-io v0.3.1
[INFO] [stderr]     Checking creep v0.1.1
[INFO] [stderr]     Checking unsigned-varint v0.2.3
[INFO] [stderr]     Checking hex v0.4.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling secp256k1-sys v0.1.1
[INFO] [stderr]    Compiling secp256k1 v0.15.5
[INFO] [stderr]    Compiling num-bigint v0.2.4
[INFO] [stderr]     Checking rlp v0.4.4
[INFO] [stderr]     Checking tokio-executor v0.1.9
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking futures-channel v0.3.1
[INFO] [stderr]     Checking ring v0.16.9
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking block-cipher-trait v0.6.2
[INFO] [stderr]     Checking stream-cipher v0.3.2
[INFO] [stderr]     Checking flatbuffers v0.6.0
[INFO] [stderr]     Checking hasher v0.1.3
[INFO] [stderr]     Checking tokio-timer v0.2.12
[INFO] [stderr]     Checking tokio-current-thread v0.1.6
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking sha3 v0.8.2
[INFO] [stderr]     Checking hmac v0.7.1
[INFO] [stderr]    Compiling derive_more v0.15.0
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking ctr v0.3.2
[INFO] [stderr]     Checking aes-soft v0.3.3
[INFO] [stderr]     Checking twofish v0.2.0
[INFO] [stderr]     Checking impl-rlp v0.2.1
[INFO] [stderr]     Checking fixed-hash v0.2.5
[INFO] [stderr]    Compiling zeroize_derive v0.9.3
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking flatbuffers-verifier v0.2.1
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking tokio-threadpool v0.1.17
[INFO] [stderr]     Checking uint v0.4.1
[INFO] [stderr]     Checking aes-ctr v0.3.0
[INFO] [stderr]     Checking tokio-codec v0.1.1
[INFO] [stderr]     Checking tokio-reactor v0.1.11
[INFO] [stderr]     Checking fixed-hash v0.5.2
[INFO] [stderr]    Compiling backtrace v0.3.40
[INFO] [stderr]     Checking parking_lot_core v0.5.0
[INFO] [stderr]     Checking tokio-udp v0.1.5
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio-uds v0.2.5
[INFO] [stderr]     Checking secp256k1 v0.17.1
[INFO] [stderr]     Checking tokio-fs v0.1.6
[INFO] [stderr]     Checking parking_lot v0.8.0
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking zeroize v0.9.3
[INFO] [stderr]     Checking num-integer v0.1.41
[INFO] [stderr]     Checking tentacle-secio v0.1.11
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling thiserror-impl v1.0.9
[INFO] [stderr]    Compiling ophelia-derive v0.2.0
[INFO] [stderr]    Compiling async-trait v0.1.22
[INFO] [stderr]    Compiling failure v0.1.6
[INFO] [stderr]    Compiling muta-vendor-prost-derive v0.5.1
[INFO] [stderr]     Checking thiserror v1.0.9
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]     Checking ophelia-hasher v0.2.0
[INFO] [stderr]     Checking ophelia v0.2.0
[INFO] [stderr]     Checking ophelia-secp256k1 v0.2.0
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stderr]     Checking muta-vendor-prost v0.5.1
[INFO] [stderr]     Checking serde v1.0.104
[INFO] [stderr]     Checking futures-executor v0.3.1
[INFO] [stderr]     Checking futures v0.3.1
[INFO] [stderr]     Checking ethereum-types-serialize v0.2.2
[INFO] [stderr]     Checking serde_json v1.0.44
[INFO] [stderr]     Checking impl-serde v0.2.3
[INFO] [stderr]     Checking bincode v1.2.1
[INFO] [stderr]     Checking ethbloom v0.5.3
[INFO] [stderr]     Checking ethbloom v0.8.1
[INFO] [stderr]     Checking ethereum-types v0.4.2
[INFO] [stderr]     Checking amcl_wrapper v0.2.3
[INFO] [stderr]     Checking rlp v0.3.0
[INFO] [stderr]     Checking secret_sharing v0.1.1
[INFO] [stderr]     Checking cita_trie v2.0.0
[INFO] [stderr]     Checking bls_amcl v0.7.0
[INFO] [stderr]     Checking ophelia-bls-amcl v0.1.0
[INFO] [stderr]     Checking muta-protocol v0.1.0-alpha.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/muta-protocol-0.1.0-alpha.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![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 `muta-protocol`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "1b37271995243c83dfbcc888804a0b9bc5d0d8d279ee21fbe4ec03bcaa393730", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b37271995243c83dfbcc888804a0b9bc5d0d8d279ee21fbe4ec03bcaa393730", kill_on_drop: false }`
[INFO] [stdout] 1b37271995243c83dfbcc888804a0b9bc5d0d8d279ee21fbe4ec03bcaa393730