[INFO] fetching crate tower-discover 0.3.0...
[INFO] checking tower-discover-0.3.0 against beta for pr-78714
[INFO] extracting crate tower-discover 0.3.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate tower-discover 0.3.0 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 tower-discover 0.3.0
[INFO] finished tweaking crates.io crate tower-discover 0.3.0
[INFO] tweaked toml for crates.io crate tower-discover 0.3.0 written to /workspace/builds/worker-12/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] 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-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 991d52364f1fa7adf411cec6a2b7c4a5da63bd49d01ea5660be0bf76aad627a4
[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" "991d52364f1fa7adf411cec6a2b7c4a5da63bd49d01ea5660be0bf76aad627a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "991d52364f1fa7adf411cec6a2b7c4a5da63bd49d01ea5660be0bf76aad627a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "991d52364f1fa7adf411cec6a2b7c4a5da63bd49d01ea5660be0bf76aad627a4", kill_on_drop: false }`
[INFO] [stdout] 991d52364f1fa7adf411cec6a2b7c4a5da63bd49d01ea5660be0bf76aad627a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 6396edeb583dfd447c0f57bb6307a6263f367c63da5c68d2d089cd2350ab2495
[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" "6396edeb583dfd447c0f57bb6307a6263f367c63da5c68d2d089cd2350ab2495", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-core v0.3.8
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]     Checking pin-project v0.4.27
[INFO] [stderr]     Checking tower-discover v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.99s
[INFO] running `Command { std: "docker" "inspect" "6396edeb583dfd447c0f57bb6307a6263f367c63da5c68d2d089cd2350ab2495", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6396edeb583dfd447c0f57bb6307a6263f367c63da5c68d2d089cd2350ab2495", kill_on_drop: false }`
[INFO] [stdout] 6396edeb583dfd447c0f57bb6307a6263f367c63da5c68d2d089cd2350ab2495