[INFO] fetching crate potential 2.2.1...
[INFO] checking potential-2.2.1 against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] extracting crate potential 2.2.1 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate potential 2.2.1 on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate potential 2.2.1
[INFO] finished tweaking crates.io crate potential 2.2.1
[INFO] tweaked toml for crates.io crate potential 2.2.1 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "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] 7544ba74d01d3ed73adb9363828e8d408f82a7e031f4a7e3634ae16151943fb1
[INFO] running `Command { std: "docker" "start" "-a" "7544ba74d01d3ed73adb9363828e8d408f82a7e031f4a7e3634ae16151943fb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7544ba74d01d3ed73adb9363828e8d408f82a7e031f4a7e3634ae16151943fb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7544ba74d01d3ed73adb9363828e8d408f82a7e031f4a7e3634ae16151943fb1", kill_on_drop: false }`
[INFO] [stdout] 7544ba74d01d3ed73adb9363828e8d408f82a7e031f4a7e3634ae16151943fb1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c71e4c87284a31c18ae1798616db2f0776224c3417a9d041e403fc7ab0b02bb
[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" "2c71e4c87284a31c18ae1798616db2f0776224c3417a9d041e403fc7ab0b02bb", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-task v0.3.15
[INFO] [stderr]    Compiling futures-channel v0.3.15
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]    Compiling futures-util v0.3.15
[INFO] [stderr]     Checking potential v2.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.81s
[INFO] running `Command { std: "docker" "inspect" "2c71e4c87284a31c18ae1798616db2f0776224c3417a9d041e403fc7ab0b02bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c71e4c87284a31c18ae1798616db2f0776224c3417a9d041e403fc7ab0b02bb", kill_on_drop: false }`
[INFO] [stdout] 2c71e4c87284a31c18ae1798616db2f0776224c3417a9d041e403fc7ab0b02bb