[INFO] fetching crate kf-protocol-fs 3.0.0...
[INFO] checking kf-protocol-fs-3.0.0 against beta for pr-78714
[INFO] extracting crate kf-protocol-fs 3.0.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate kf-protocol-fs 3.0.0 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 kf-protocol-fs 3.0.0
[INFO] finished tweaking crates.io crate kf-protocol-fs 3.0.0
[INFO] tweaked toml for crates.io crate kf-protocol-fs 3.0.0 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate kf-protocol-fs 3.0.0 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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b2b259fc27787a98d2ee50b4810e0dd557d3f602b36c8c9c1aba755180fcfe00
[INFO] running `Command { std: "docker" "start" "-a" "b2b259fc27787a98d2ee50b4810e0dd557d3f602b36c8c9c1aba755180fcfe00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b2b259fc27787a98d2ee50b4810e0dd557d3f602b36c8c9c1aba755180fcfe00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2b259fc27787a98d2ee50b4810e0dd557d3f602b36c8c9c1aba755180fcfe00", kill_on_drop: false }`
[INFO] [stdout] b2b259fc27787a98d2ee50b4810e0dd557d3f602b36c8c9c1aba755180fcfe00
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] b7b41bf8b3bbe28787380c7bc8e8cc088b59a6d233d4c64ae313ecac4d35b137
[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" "b7b41bf8b3bbe28787380c7bc8e8cc088b59a6d233d4c64ae313ecac4d35b137", kill_on_drop: false }`
[INFO] [stderr] warning: feature `cli` is not present in [features] section.
[INFO] [stderr] warning: feature `cli` is not present in [features] section.
[INFO] [stderr] warning: feature `cli` is not present in [features] section.
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]     Checking futures-sink v0.3.5
[INFO] [stderr]    Compiling crc32c v0.5.0
[INFO] [stderr]     Checking vec-arena v0.5.2
[INFO] [stderr]     Checking send_wrapper v0.4.0
[INFO] [stderr]     Checking parking v1.0.6
[INFO] [stderr]     Checking futures-timer v2.0.2
[INFO] [stderr]     Checking tracing-core v0.1.16
[INFO] [stderr]     Checking sharded-slab v0.0.9
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking multitask v0.2.0
[INFO] [stderr]     Checking futures-lite v0.1.11
[INFO] [stderr]     Checking content_inspector v0.2.4
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]     Checking num-integer v0.1.43
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]    Compiling async-trait v0.1.40
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.68
[INFO] [stderr]     Checking tracing-log v0.1.1
[INFO] [stderr]    Compiling kf-protocol-derive v0.2.0
[INFO] [stderr]     Checking blocking v0.5.2
[INFO] [stderr]     Checking paste v0.1.18
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.68
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking polling v0.1.9
[INFO] [stderr]     Checking socket2 v0.3.15
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking nix v0.17.0
[INFO] [stderr]     Checking tracing v0.1.19
[INFO] [stderr]     Checking async-io v0.1.11
[INFO] [stderr]     Checking chrono v0.4.15
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.68
[INFO] [stderr]     Checking async-executor v0.1.2
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking wasm-bindgen v0.2.68
[INFO] [stderr]     Checking js-sys v0.3.45
[INFO] [stderr]     Checking serde v1.0.116
[INFO] [stderr]     Checking web-sys v0.3.45
[INFO] [stderr]     Checking tracing-serde v0.1.2
[INFO] [stderr]     Checking serde_json v1.0.57
[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] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "b7b41bf8b3bbe28787380c7bc8e8cc088b59a6d233d4c64ae313ecac4d35b137", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7b41bf8b3bbe28787380c7bc8e8cc088b59a6d233d4c64ae313ecac4d35b137", kill_on_drop: false }`
[INFO] [stdout] b7b41bf8b3bbe28787380c7bc8e8cc088b59a6d233d4c64ae313ecac4d35b137