[INFO] updating cached repository https://github.com/llogiq/optional
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] [stderr] From https://github.com/llogiq/optional
[INFO] [stderr]  - [deleted]         (none)     -> dependabot/cargo/serde-1.0.112
[INFO] [stderr]  - [deleted]         (none)     -> dependabot/cargo/serde_json-1.0.55
[INFO] [stderr]    15cf0a8..edf854f  master     -> master
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] edf854f64c10c811bf281549e6327916f83be149
[INFO] checking llogiq/optional against try#6024cfef3a82f9a7688f07054f1650081bad3af5 for pr-74130
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fllogiq%2Foptional" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/llogiq/optional on toolchain 6024cfef3a82f9a7688f07054f1650081bad3af5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/llogiq/optional
[INFO] finished tweaking git repo https://github.com/llogiq/optional
[INFO] tweaked toml for git repo https://github.com/llogiq/optional written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/llogiq/optional already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5791e07a61797902efa84d02aa9ae4e5c36694f21bf3bd208cdd0103f126e7a8
[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" "5791e07a61797902efa84d02aa9ae4e5c36694f21bf3bd208cdd0103f126e7a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5791e07a61797902efa84d02aa9ae4e5c36694f21bf3bd208cdd0103f126e7a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5791e07a61797902efa84d02aa9ae4e5c36694f21bf3bd208cdd0103f126e7a8", kill_on_drop: false }`
[INFO] [stdout] 5791e07a61797902efa84d02aa9ae4e5c36694f21bf3bd208cdd0103f126e7a8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] ab1522bcc2d08ca3ccc0194db78ddcf59b09d5b60a93a5d42df920b8fffcef2f
[INFO] running `Command { std: "docker" "start" "-a" "ab1522bcc2d08ca3ccc0194db78ddcf59b09d5b60a93a5d42df920b8fffcef2f", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling serde_json v1.0.56
[INFO] [stderr]     Checking itoa v0.4.3
[INFO] [stderr]     Checking bencher v0.1.5
[INFO] [stderr]     Checking optional v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.04s
[INFO] running `Command { std: "docker" "inspect" "ab1522bcc2d08ca3ccc0194db78ddcf59b09d5b60a93a5d42df920b8fffcef2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab1522bcc2d08ca3ccc0194db78ddcf59b09d5b60a93a5d42df920b8fffcef2f", kill_on_drop: false }`
[INFO] [stdout] ab1522bcc2d08ca3ccc0194db78ddcf59b09d5b60a93a5d42df920b8fffcef2f