[INFO] fetching crate r4v 0.1.0...
[INFO] checking r4v-0.1.0 against master#ffa2e7ae8fbf9badc035740db949b9dae271c29f for pr-78338
[INFO] extracting crate r4v 0.1.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate r4v 0.1.0 on toolchain ffa2e7ae8fbf9badc035740db949b9dae271c29f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa2e7ae8fbf9badc035740db949b9dae271c29f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate r4v 0.1.0
[INFO] finished tweaking crates.io crate r4v 0.1.0
[INFO] tweaked toml for crates.io crate r4v 0.1.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate r4v 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa2e7ae8fbf9badc035740db949b9dae271c29f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+ffa2e7ae8fbf9badc035740db949b9dae271c29f" "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] ce533b2c0fd8d3b42fd9a4c8dfd0ef3e20e5c9630793bf1f3333c5bb10da631f
[INFO] running `Command { std: "docker" "start" "-a" "ce533b2c0fd8d3b42fd9a4c8dfd0ef3e20e5c9630793bf1f3333c5bb10da631f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ce533b2c0fd8d3b42fd9a4c8dfd0ef3e20e5c9630793bf1f3333c5bb10da631f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce533b2c0fd8d3b42fd9a4c8dfd0ef3e20e5c9630793bf1f3333c5bb10da631f", kill_on_drop: false }`
[INFO] [stdout] ce533b2c0fd8d3b42fd9a4c8dfd0ef3e20e5c9630793bf1f3333c5bb10da631f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+ffa2e7ae8fbf9badc035740db949b9dae271c29f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 56a3659a743a3e391b33e27bfae598183595bebd134673296f336a779a983bf7
[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" "56a3659a743a3e391b33e27bfae598183595bebd134673296f336a779a983bf7", kill_on_drop: false }`
[INFO] [stderr]     Checking r4v v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "56a3659a743a3e391b33e27bfae598183595bebd134673296f336a779a983bf7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56a3659a743a3e391b33e27bfae598183595bebd134673296f336a779a983bf7", kill_on_drop: false }`
[INFO] [stdout] 56a3659a743a3e391b33e27bfae598183595bebd134673296f336a779a983bf7