[INFO] fetching crate learn_rust_together 0.1.1...
[INFO] checking learn_rust_together-0.1.1 against 1.55.0 for beta-1.56-3
[INFO] extracting crate learn_rust_together 0.1.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate learn_rust_together 0.1.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate learn_rust_together 0.1.1
[INFO] finished tweaking crates.io crate learn_rust_together 0.1.1
[INFO] tweaked toml for crates.io crate learn_rust_together 0.1.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 59e6bf69b3d3e8e750a87cfda313608b8451e7a7cddde7a9a2333f36daebe2ae
[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" "59e6bf69b3d3e8e750a87cfda313608b8451e7a7cddde7a9a2333f36daebe2ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "59e6bf69b3d3e8e750a87cfda313608b8451e7a7cddde7a9a2333f36daebe2ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59e6bf69b3d3e8e750a87cfda313608b8451e7a7cddde7a9a2333f36daebe2ae", kill_on_drop: false }`
[INFO] [stdout] 59e6bf69b3d3e8e750a87cfda313608b8451e7a7cddde7a9a2333f36daebe2ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2f7cf6135fafb982a1580c8d1f1f3fcbbe2d9bf54a50088ea1da61d207a8c33f
[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" "2f7cf6135fafb982a1580c8d1f1f3fcbbe2d9bf54a50088ea1da61d207a8c33f", kill_on_drop: false }`
[INFO] [stderr]     Checking learn_rust_together v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `Command { std: "docker" "inspect" "2f7cf6135fafb982a1580c8d1f1f3fcbbe2d9bf54a50088ea1da61d207a8c33f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f7cf6135fafb982a1580c8d1f1f3fcbbe2d9bf54a50088ea1da61d207a8c33f", kill_on_drop: false }`
[INFO] [stdout] 2f7cf6135fafb982a1580c8d1f1f3fcbbe2d9bf54a50088ea1da61d207a8c33f
