[INFO] updating cached repository https://github.com/metaworm/easy-rpc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] abdea55a0b278b68339a60ae6aba9b4d5f1d249b
[INFO] testing metaworm/easy-rpc against 1.45.2 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmetaworm%2Feasy-rpc" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/metaworm/easy-rpc on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/metaworm/easy-rpc
[INFO] finished tweaking git repo https://github.com/metaworm/easy-rpc
[INFO] tweaked toml for git repo https://github.com/metaworm/easy-rpc written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/metaworm/easy-rpc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1f3c8a426627f2f80cf25ee9e2eb1b63a383ff260674803476ff9ad0f98056d6
[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" "1f3c8a426627f2f80cf25ee9e2eb1b63a383ff260674803476ff9ad0f98056d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1f3c8a426627f2f80cf25ee9e2eb1b63a383ff260674803476ff9ad0f98056d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f3c8a426627f2f80cf25ee9e2eb1b63a383ff260674803476ff9ad0f98056d6", kill_on_drop: false }`
[INFO] [stdout] 1f3c8a426627f2f80cf25ee9e2eb1b63a383ff260674803476ff9ad0f98056d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4980d3d8f76c312be8033ac6d2a16fb3693c368e409b4ff02a367e54651a8210
[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" "4980d3d8f76c312be8033ac6d2a16fb3693c368e409b4ff02a367e54651a8210", kill_on_drop: false }`
[INFO] [stderr]    Compiling smallvec v1.0.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling serde v1.0.103
[INFO] [stderr]    Compiling downcast-rs v1.1.1
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling memrange v0.1.3
[INFO] [stderr]    Compiling num_cpus v1.11.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling mio v0.6.21
[INFO] [stderr]    Compiling tokio-executor v0.1.9
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling theban_interval_tree v0.7.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling unicode-normalization v0.1.11
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling nix v0.10.0
[INFO] [stderr]    Compiling tokio-reactor v0.1.11
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling rmp v0.8.8
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling enum_primitive v0.1.1
[INFO] [stderr]    Compiling rmpv v0.4.2
[INFO] [stderr]    Compiling websocket-base v0.24.0
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling hyper v0.10.16
[INFO] [stderr]    Compiling shared_memory_derive v0.10.0
[INFO] [stderr]    Compiling shared_memory v0.10.0
[INFO] [stderr]    Compiling websocket v0.24.0
[INFO] [stderr]    Compiling serde_bytes v0.11.3
[INFO] [stderr]    Compiling rmp-serde v0.14.2
[INFO] [stderr]    Compiling easy-rpc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(unboxed_closures, fn_traits)]
[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 `easy-rpc`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "4980d3d8f76c312be8033ac6d2a16fb3693c368e409b4ff02a367e54651a8210", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4980d3d8f76c312be8033ac6d2a16fb3693c368e409b4ff02a367e54651a8210", kill_on_drop: false }`
[INFO] [stdout] 4980d3d8f76c312be8033ac6d2a16fb3693c368e409b4ff02a367e54651a8210