[INFO] fetching crate vinyl 0.0.4...
[INFO] documenting vinyl-0.0.4 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate vinyl 0.0.4 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate vinyl 0.0.4 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate vinyl 0.0.4
[INFO] finished tweaking crates.io crate vinyl 0.0.4
[INFO] tweaked toml for crates.io crate vinyl 0.0.4 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fe3f55e20297d9fde6236c15a63e02f024e42eef1ab62ea72596cd2055796408
[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" "fe3f55e20297d9fde6236c15a63e02f024e42eef1ab62ea72596cd2055796408", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe3f55e20297d9fde6236c15a63e02f024e42eef1ab62ea72596cd2055796408", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe3f55e20297d9fde6236c15a63e02f024e42eef1ab62ea72596cd2055796408", kill_on_drop: false }`
[INFO] [stdout] fe3f55e20297d9fde6236c15a63e02f024e42eef1ab62ea72596cd2055796408
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "RUSTDOCFLAGS=--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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 954977bb7e260c0510a896b172aa27fb6b8aef333e5dd561575d712a9bfcd40a
[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" "954977bb7e260c0510a896b172aa27fb6b8aef333e5dd561575d712a9bfcd40a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling protobuf v2.8.2
[INFO] [stderr]    Compiling httpbis v0.7.0
[INFO] [stderr]     Checking tls-api v0.1.22
[INFO] [stderr]     Checking unix_socket v0.5.0
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking tokio-uds v0.1.7
[INFO] [stderr]     Checking tokio-tls-api v0.1.22
[INFO] [stderr]     Checking tls-api-stub v0.1.22
[INFO] [stderr]     Checking grpc v0.6.2
[INFO] [stderr]     Checking vinyl-core v0.0.2
[INFO] [stdout] error[E0425]: cannot find value `VERSION_2_8_1` in crate `protobuf`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/vinyl-core-0.0.2/src/proto/example.rs:27:49
[INFO] [stdout]    |
[INFO] [stdout] 27 | const _PROTOBUF_VERSION_CHECK: () = ::protobuf::VERSION_2_8_1;
[INFO] [stdout]    |                                                 ^^^^^^^^^^^^^ help: a constant with a similar name exists: `VERSION_2_8_2`
[INFO] [stdout]    | 
[INFO] [stdout]   ::: /opt/rustwide/target/debug/build/protobuf-0fed3df4218c1ea5/out/version.rs:7:1
[INFO] [stdout]    |
[INFO] [stdout] 7  | pub const VERSION_2_8_2: () = ();
[INFO] [stdout]    | --------------------------------- similarly named constant `VERSION_2_8_2` defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `VERSION_2_8_1` in crate `protobuf`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/vinyl-core-0.0.2/src/proto/transport.rs:27:49
[INFO] [stdout]    |
[INFO] [stdout] 27 | const _PROTOBUF_VERSION_CHECK: () = ::protobuf::VERSION_2_8_1;
[INFO] [stdout]    |                                                 ^^^^^^^^^^^^^ help: a constant with a similar name exists: `VERSION_2_8_2`
[INFO] [stdout]    | 
[INFO] [stdout]   ::: /opt/rustwide/target/debug/build/protobuf-0fed3df4218c1ea5/out/version.rs:7:1
[INFO] [stdout]    |
[INFO] [stdout] 7  | pub const VERSION_2_8_2: () = ();
[INFO] [stdout]    | --------------------------------- similarly named constant `VERSION_2_8_2` defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `vinyl-core`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "954977bb7e260c0510a896b172aa27fb6b8aef333e5dd561575d712a9bfcd40a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "954977bb7e260c0510a896b172aa27fb6b8aef333e5dd561575d712a9bfcd40a", kill_on_drop: false }`
[INFO] [stdout] 954977bb7e260c0510a896b172aa27fb6b8aef333e5dd561575d712a9bfcd40a