[INFO] fetching crate walrus 0.18.0...
[INFO] checking walrus-0.18.0 against beta for pr-78714
[INFO] extracting crate walrus 0.18.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate walrus 0.18.0 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 walrus 0.18.0
[INFO] finished tweaking crates.io crate walrus 0.18.0
[INFO] tweaked toml for crates.io crate walrus 0.18.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate crates.io crate walrus 0.18.0 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-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 7ebdb7448d9a35ad6c9a4dd5a8339988409bbc6960f2f9bdadb64725269b8b88
[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" "7ebdb7448d9a35ad6c9a4dd5a8339988409bbc6960f2f9bdadb64725269b8b88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7ebdb7448d9a35ad6c9a4dd5a8339988409bbc6960f2f9bdadb64725269b8b88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ebdb7448d9a35ad6c9a4dd5a8339988409bbc6960f2f9bdadb64725269b8b88", kill_on_drop: false }`
[INFO] [stdout] 7ebdb7448d9a35ad6c9a4dd5a8339988409bbc6960f2f9bdadb64725269b8b88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 521517f168edd43650f51bc6ea9f2eda8d59f0c59563282345b17760b4a3440b
[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" "521517f168edd43650f51bc6ea9f2eda8d59f0c59563282345b17760b4a3440b", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.34
[INFO] [stderr]     Checking id-arena v2.2.1
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking tinytemplate v1.1.0
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking rayon-core v1.7.1
[INFO] [stderr]     Checking rayon v1.3.1
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling walrus-macro v0.18.0
[INFO] [stderr]     Checking walrus v0.18.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion v0.3.3
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 37.88s
[INFO] running `Command { std: "docker" "inspect" "521517f168edd43650f51bc6ea9f2eda8d59f0c59563282345b17760b4a3440b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "521517f168edd43650f51bc6ea9f2eda8d59f0c59563282345b17760b4a3440b", kill_on_drop: false }`
[INFO] [stdout] 521517f168edd43650f51bc6ea9f2eda8d59f0c59563282345b17760b4a3440b