[INFO] fetching crate nstack 0.6.2...
[INFO] checking nstack-0.6.2 against beta for pr-78714
[INFO] extracting crate nstack 0.6.2 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate nstack 0.6.2 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 nstack 0.6.2
[INFO] finished tweaking crates.io crate nstack 0.6.2
[INFO] tweaked toml for crates.io crate nstack 0.6.2 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 9fe836e4d4ac426f5621298baecb07ba7b72c3d6a5603482a5fc714b76220c26
[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" "9fe836e4d4ac426f5621298baecb07ba7b72c3d6a5603482a5fc714b76220c26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9fe836e4d4ac426f5621298baecb07ba7b72c3d6a5603482a5fc714b76220c26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9fe836e4d4ac426f5621298baecb07ba7b72c3d6a5603482a5fc714b76220c26", kill_on_drop: false }`
[INFO] [stdout] 9fe836e4d4ac426f5621298baecb07ba7b72c3d6a5603482a5fc714b76220c26
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 857ccdf8f5a3fc5f2a10ce5f1dd3ba536e23d68e44587c17ea46f4403bee9427
[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" "857ccdf8f5a3fc5f2a10ce5f1dd3ba536e23d68e44587c17ea46f4403bee9427", kill_on_drop: false }`
[INFO] [stderr] error: failed to download `const-arrayvec v0.2.1`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   unable to get packages from source
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to unpack package `const-arrayvec v0.2.1`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to open `/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/const-arrayvec-0.2.1/.cargo-ok`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Read-only file system (os error 30)
[INFO] running `Command { std: "docker" "inspect" "857ccdf8f5a3fc5f2a10ce5f1dd3ba536e23d68e44587c17ea46f4403bee9427", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "857ccdf8f5a3fc5f2a10ce5f1dd3ba536e23d68e44587c17ea46f4403bee9427", kill_on_drop: false }`
[INFO] [stdout] 857ccdf8f5a3fc5f2a10ce5f1dd3ba536e23d68e44587c17ea46f4403bee9427