[INFO] fetching crate kf-protocol-message 1.0.2...
[INFO] checking kf-protocol-message-1.0.2 against beta-2020-07-24 for pr-75494-beta
[INFO] extracting crate kf-protocol-message 1.0.2 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate kf-protocol-message 1.0.2 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate kf-protocol-message 1.0.2
[INFO] finished tweaking crates.io crate kf-protocol-message 1.0.2
[INFO] tweaked toml for crates.io crate kf-protocol-message 1.0.2 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6dfaa49934752daa8ea83206f525769bf75cbb21578c2da47e179aef2a0d09ff
[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" "6dfaa49934752daa8ea83206f525769bf75cbb21578c2da47e179aef2a0d09ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6dfaa49934752daa8ea83206f525769bf75cbb21578c2da47e179aef2a0d09ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6dfaa49934752daa8ea83206f525769bf75cbb21578c2da47e179aef2a0d09ff", kill_on_drop: false }`
[INFO] [stdout] 6dfaa49934752daa8ea83206f525769bf75cbb21578c2da47e179aef2a0d09ff
[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" "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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 682d9e64aff2b1b12f52e7c7ca26a40c674de8acbef7ba3cbec6e478b393f887
[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" "682d9e64aff2b1b12f52e7c7ca26a40c674de8acbef7ba3cbec6e478b393f887", kill_on_drop: false }`
[INFO] [stderr]    Compiling crc32c v0.5.0
[INFO] [stderr]     Checking num-integer v0.1.43
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]     Checking content_inspector v0.2.4
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling kf-protocol-derive v0.1.1
[INFO] [stderr]     Checking serde v1.0.115
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking chrono v0.4.15
[INFO] [stderr]     Checking paste v0.1.18
[INFO] [stderr]     Checking flv-util v0.1.1
[INFO] [stderr]     Checking flv-util v0.2.1
[INFO] [stderr]     Checking kf-protocol-core v0.1.2
[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/kf-protocol-core-0.1.2/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(specialization)]
[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 `kf-protocol-core`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "682d9e64aff2b1b12f52e7c7ca26a40c674de8acbef7ba3cbec6e478b393f887", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "682d9e64aff2b1b12f52e7c7ca26a40c674de8acbef7ba3cbec6e478b393f887", kill_on_drop: false }`
[INFO] [stdout] 682d9e64aff2b1b12f52e7c7ca26a40c674de8acbef7ba3cbec6e478b393f887
