[INFO] fetching crate gearley 0.0.4...
[INFO] checking gearley-0.0.4 against beta for pr-78714
[INFO] extracting crate gearley 0.0.4 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate gearley 0.0.4 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 gearley 0.0.4
[INFO] finished tweaking crates.io crate gearley 0.0.4
[INFO] tweaked toml for crates.io crate gearley 0.0.4 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded phf_macros v0.7.24
[INFO] [stderr]   Downloaded internship v0.6.0
[INFO] [stderr]   Downloaded c_lexer v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 315b07a6935a1a5968350b1c1909118dd0a3d20d442bd4b9a9aec15928795101
[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" "315b07a6935a1a5968350b1c1909118dd0a3d20d442bd4b9a9aec15928795101", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "315b07a6935a1a5968350b1c1909118dd0a3d20d442bd4b9a9aec15928795101", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "315b07a6935a1a5968350b1c1909118dd0a3d20d442bd4b9a9aec15928795101", kill_on_drop: false }`
[INFO] [stdout] 315b07a6935a1a5968350b1c1909118dd0a3d20d442bd4b9a9aec15928795101
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 768ba597bd939686aaee69609695ee75c8675703dd73a686f9d7abe1dffcefe1
[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" "768ba597bd939686aaee69609695ee75c8675703dd73a686f9d7abe1dffcefe1", kill_on_drop: false }`
[INFO] [stderr]     Checking ref_slice v1.2.0
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]     Checking bit-vec v0.6.2
[INFO] [stderr]     Checking optional v0.5.0
[INFO] [stderr]     Checking internship v0.6.0
[INFO] [stderr]     Checking num-iter v0.1.42
[INFO] [stderr]    Compiling phf_macros v0.7.24
[INFO] [stderr]     Checking num-rational v0.2.4
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking bit-matrix v0.6.0
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking cfg v0.5.0
[INFO] [stderr]     Checking phf v0.7.24
[INFO] [stderr]     Checking gearley v0.0.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking c_lexer v0.1.1
[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/c_lexer-0.1.1/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene)]
[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 `c_lexer`
[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] [stdout] warning: field is never read: `nop`
[INFO] [stdout]    --> src/forest/node.rs:149:5
[INFO] [stdout]     |
[INFO] [stdout] 149 |     nop: NopRepr,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `nop`
[INFO] [stdout]    --> src/forest/node.rs:212:5
[INFO] [stdout]     |
[INFO] [stdout] 212 |     nop: u16,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "768ba597bd939686aaee69609695ee75c8675703dd73a686f9d7abe1dffcefe1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "768ba597bd939686aaee69609695ee75c8675703dd73a686f9d7abe1dffcefe1", kill_on_drop: false }`
[INFO] [stdout] 768ba597bd939686aaee69609695ee75c8675703dd73a686f9d7abe1dffcefe1