[INFO] fetching crate ringbuffer 0.4.0...
[INFO] checking ringbuffer-0.4.0 against master#9503ea19edbf01b9435e80e17d60ce1b88390116 for pr-81782
[INFO] extracting crate ringbuffer 0.4.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate ringbuffer 0.4.0 on toolchain 9503ea19edbf01b9435e80e17d60ce1b88390116
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ringbuffer 0.4.0
[INFO] finished tweaking crates.io crate ringbuffer 0.4.0
[INFO] tweaked toml for crates.io crate ringbuffer 0.4.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "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] 1e94011628ff463f7022700fdd65e2a2bb7d986344d62836bbe043b9b4312f07
[INFO] running `Command { std: "docker" "start" "-a" "1e94011628ff463f7022700fdd65e2a2bb7d986344d62836bbe043b9b4312f07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e94011628ff463f7022700fdd65e2a2bb7d986344d62836bbe043b9b4312f07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e94011628ff463f7022700fdd65e2a2bb7d986344d62836bbe043b9b4312f07", kill_on_drop: false }`
[INFO] [stdout] 1e94011628ff463f7022700fdd65e2a2bb7d986344d62836bbe043b9b4312f07
[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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] e49fbfdf180c88d02269c673799864e826bf97c57d33fe498a2d24cc5439c0c2
[INFO] running `Command { std: "docker" "start" "-a" "e49fbfdf180c88d02269c673799864e826bf97c57d33fe498a2d24cc5439c0c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]     Checking cast v0.1.0
[INFO] [stderr]     Checking thread-scoped v1.0.2
[INFO] [stderr]     Checking term v0.4.6
[INFO] [stderr]     Checking itertools v0.4.19
[INFO] [stderr]     Checking itertools v0.5.10
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking num_cpus v0.2.13
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking isatty v0.1.9
[INFO] [stderr]     Checking ringbuffer v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking backtrace v0.3.56
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking criterion-plot v0.1.3
[INFO] [stderr]     Checking simplelog v0.4.4
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking criterion-stats v0.1.3
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]     Checking serde_json v1.0.63
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking criterion v0.1.2
[INFO] [stdout] error[E0432]: unresolved import `ringbuffer::ConstGenericRingBuffer`
[INFO] [stdout]  --> benches/bench.rs:6:35
[INFO] [stdout]   |
[INFO] [stdout] 6 | use ringbuffer::{AllocRingBuffer, ConstGenericRingBuffer, GenericRingBuffer, RingBuffer};
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |                                   |
[INFO] [stdout]   |                                   no `ConstGenericRingBuffer` in the root
[INFO] [stdout]   |                                   help: a similar name exists in the module: `GenericRingBuffer`
[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 E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ringbuffer`
[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" "e49fbfdf180c88d02269c673799864e826bf97c57d33fe498a2d24cc5439c0c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e49fbfdf180c88d02269c673799864e826bf97c57d33fe498a2d24cc5439c0c2", kill_on_drop: false }`
[INFO] [stdout] e49fbfdf180c88d02269c673799864e826bf97c57d33fe498a2d24cc5439c0c2