[INFO] fetching crate tower 0.3.0-alpha.2...
[INFO] checking tower-0.3.0-alpha.2 against beta-2019-10-27 for pr-65897
[INFO] extracting crate tower 0.3.0-alpha.2 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate tower 0.3.0-alpha.2 on toolchain beta-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate tower 0.3.0-alpha.2
[INFO] finished tweaking crates.io crate tower 0.3.0-alpha.2
[INFO] tweaked toml for crates.io crate tower 0.3.0-alpha.2 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] efc4e96fd69fcabcea8d3c80d8cb1d3bda9bc6db227769be5e0d87cd1b632484
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "efc4e96fd69fcabcea8d3c80d8cb1d3bda9bc6db227769be5e0d87cd1b632484"`
[INFO] [stderr]     Checking tower-layer v0.3.0-alpha.2
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking tokio-sync v0.2.0-alpha.6
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling pin-project-internal v0.4.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.5
[INFO] [stderr]    Compiling tokio-macros v0.2.0-alpha.6
[INFO] [stderr]     Checking tracing v0.1.10
[INFO] [stderr]     Checking tokio-executor v0.2.0-alpha.6
[INFO] [stderr]     Checking pin-project v0.4.5
[INFO] [stderr]     Checking tokio-io v0.2.0-alpha.6
[INFO] [stderr]     Checking tower-load-shed v0.3.0-alpha.2
[INFO] [stderr]     Checking tower-util v0.3.0-alpha.2
[INFO] [stderr]     Checking tower-discover v0.3.0-alpha.2
[INFO] [stderr]     Checking tokio-codec v0.2.0-alpha.6
[INFO] [stderr]     Checking tokio-timer v0.3.0-alpha.6
[INFO] [stderr]     Checking tokio-fs v0.2.0-alpha.6
[INFO] [stderr]     Checking tower-buffer v0.3.0-alpha.2
[INFO] [stderr]     Checking tokio-net v0.2.0-alpha.6
[INFO] [stderr]     Checking tower-timeout v0.3.0-alpha.2
[INFO] [stderr]     Checking tower-limit v0.3.0-alpha.2
[INFO] [stderr]     Checking tower-retry v0.3.0-alpha.2
[INFO] [stderr]     Checking tower v0.3.0-alpha.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking tokio v0.2.0-alpha.6
[INFO] [stderr]     Checking tokio-test v0.2.0-alpha.6
[INFO] [stderr]     Checking tower-test v0.3.0-alpha.2
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.13s
[INFO] running `"docker" "inspect" "efc4e96fd69fcabcea8d3c80d8cb1d3bda9bc6db227769be5e0d87cd1b632484"`
[INFO] running `"docker" "rm" "-f" "efc4e96fd69fcabcea8d3c80d8cb1d3bda9bc6db227769be5e0d87cd1b632484"`
[INFO] [stdout] efc4e96fd69fcabcea8d3c80d8cb1d3bda9bc6db227769be5e0d87cd1b632484