[INFO] fetching crate ringbuf 0.2.6...
[INFO] checking ringbuf-0.2.6 against master#0599f3403366d9c57f0625e6de3af214b5042a90 for pr-87710
[INFO] extracting crate ringbuf 0.2.6 into /workspace/builds/worker-74/source
[INFO] validating manifest of crates.io crate ringbuf 0.2.6 on toolchain 0599f3403366d9c57f0625e6de3af214b5042a90
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ringbuf 0.2.6
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate ringbuf 0.2.6
[INFO] tweaked toml for crates.io crate ringbuf 0.2.6 written to /workspace/builds/worker-74/source/Cargo.toml
[INFO] crate crates.io crate ringbuf 0.2.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d0e343d35576300d69b32fb9c5c68b818e8c80859ddf4692befd4727328954f6
[INFO] running `Command { std: "docker" "start" "-a" "d0e343d35576300d69b32fb9c5c68b818e8c80859ddf4692befd4727328954f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0e343d35576300d69b32fb9c5c68b818e8c80859ddf4692befd4727328954f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0e343d35576300d69b32fb9c5c68b818e8c80859ddf4692befd4727328954f6", kill_on_drop: false }`
[INFO] [stdout] d0e343d35576300d69b32fb9c5c68b818e8c80859ddf4692befd4727328954f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] becdf006c898e25359710cf2a3efc7f2f9e2a884008e3c7ebb1b839387b28f21
[INFO] running `Command { std: "docker" "start" "-a" "becdf006c898e25359710cf2a3efc7f2f9e2a884008e3c7ebb1b839387b28f21", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking ringbuf v0.2.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.03s
[INFO] running `Command { std: "docker" "inspect" "becdf006c898e25359710cf2a3efc7f2f9e2a884008e3c7ebb1b839387b28f21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "becdf006c898e25359710cf2a3efc7f2f9e2a884008e3c7ebb1b839387b28f21", kill_on_drop: false }`
[INFO] [stdout] becdf006c898e25359710cf2a3efc7f2f9e2a884008e3c7ebb1b839387b28f21