[INFO] fetching crate ringbuf 0.2.6...
[INFO] checking ringbuf-0.2.6 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate ringbuf 0.2.6 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate ringbuf 0.2.6 on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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-8/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9cf00a286ac8219327f4e7282f811978ea821375515e2f23b62ee103af2ee935
[INFO] running `Command { std: "docker" "start" "-a" "9cf00a286ac8219327f4e7282f811978ea821375515e2f23b62ee103af2ee935", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9cf00a286ac8219327f4e7282f811978ea821375515e2f23b62ee103af2ee935", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cf00a286ac8219327f4e7282f811978ea821375515e2f23b62ee103af2ee935", kill_on_drop: false }`
[INFO] [stdout] 9cf00a286ac8219327f4e7282f811978ea821375515e2f23b62ee103af2ee935
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 673c2d499a66a945aac0a7693265387eaf6dfaae2a09a3c5d9951dc62fc204ad
[INFO] running `Command { std: "docker" "start" "-a" "673c2d499a66a945aac0a7693265387eaf6dfaae2a09a3c5d9951dc62fc204ad", 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 0.96s
[INFO] running `Command { std: "docker" "inspect" "673c2d499a66a945aac0a7693265387eaf6dfaae2a09a3c5d9951dc62fc204ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "673c2d499a66a945aac0a7693265387eaf6dfaae2a09a3c5d9951dc62fc204ad", kill_on_drop: false }`
[INFO] [stdout] 673c2d499a66a945aac0a7693265387eaf6dfaae2a09a3c5d9951dc62fc204ad