[INFO] fetching crate arcon_backend 0.1.1...
[INFO] checking arcon_backend-0.1.1 against beta for pr-78714
[INFO] extracting crate arcon_backend 0.1.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate arcon_backend 0.1.1 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 arcon_backend 0.1.1
[INFO] finished tweaking crates.io crate arcon_backend 0.1.1
[INFO] tweaked toml for crates.io crate arcon_backend 0.1.1 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] 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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8857e64fcab990d9a55e811b96fe810ecb871a2aeff4627a8bcb50241969cb31
[INFO] running `Command { std: "docker" "start" "-a" "8857e64fcab990d9a55e811b96fe810ecb871a2aeff4627a8bcb50241969cb31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8857e64fcab990d9a55e811b96fe810ecb871a2aeff4627a8bcb50241969cb31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8857e64fcab990d9a55e811b96fe810ecb871a2aeff4627a8bcb50241969cb31", kill_on_drop: false }`
[INFO] [stdout] 8857e64fcab990d9a55e811b96fe810ecb871a2aeff4627a8bcb50241969cb31
[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] adeb8e159c9a02819db5c96764eecb654fed8738ae9c092c955235c70526424a
[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" "adeb8e159c9a02819db5c96764eecb654fed8738ae9c092c955235c70526424a", kill_on_drop: false }`
[INFO] [stderr]     Checking arcon_error v0.1.1
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking arcon_backend v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `Command { std: "docker" "inspect" "adeb8e159c9a02819db5c96764eecb654fed8738ae9c092c955235c70526424a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adeb8e159c9a02819db5c96764eecb654fed8738ae9c092c955235c70526424a", kill_on_drop: false }`
[INFO] [stdout] adeb8e159c9a02819db5c96764eecb654fed8738ae9c092c955235c70526424a