[INFO] fetching crate torchbear 0.11.5...
[INFO] documenting torchbear-0.11.5 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate torchbear 0.11.5 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate torchbear 0.11.5 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 torchbear 0.11.5
[INFO] finished tweaking crates.io crate torchbear 0.11.5
[INFO] tweaked toml for crates.io crate torchbear 0.11.5 written to /workspace/builds/worker-4/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] [stderr]     Blocking waiting for file lock on package cache
[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]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 16e51e8fbb12ea3ffd9b85ff4ba39564150b31a9b99921da9d0d022ca289ad3d
[INFO] running `Command { std: "docker" "start" "-a" "16e51e8fbb12ea3ffd9b85ff4ba39564150b31a9b99921da9d0d022ca289ad3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "16e51e8fbb12ea3ffd9b85ff4ba39564150b31a9b99921da9d0d022ca289ad3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16e51e8fbb12ea3ffd9b85ff4ba39564150b31a9b99921da9d0d022ca289ad3d", kill_on_drop: false }`
[INFO] [stdout] 16e51e8fbb12ea3ffd9b85ff4ba39564150b31a9b99921da9d0d022ca289ad3d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3877e7c2c65ad9ee5c661f8fec9fd57b38a6258557f14c04e5e4963fa5ab9c65
[INFO] running `Command { std: "docker" "start" "-a" "3877e7c2c65ad9ee5c661f8fec9fd57b38a6258557f14c04e5e4963fa5ab9c65", kill_on_drop: false }`
[INFO] [stderr]     Checking encoding_index_tests v0.1.4
[INFO] [stderr]     Checking match_cfg v0.1.0
[INFO] [stderr]    Compiling openssl v0.10.30
[INFO] [stderr]     Checking unic-common v0.8.0
[INFO] [stderr]     Checking unic-char-range v0.8.0
[INFO] [stderr]    Compiling v_htmlescape v0.4.5
[INFO] [stderr]    Compiling crunchy v0.1.6
[INFO] [stderr]     Checking either v1.6.0
[INFO] [stderr]     Checking zeroize v1.1.0
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]    Compiling pest v1.0.6
[INFO] [stderr]     Checking variance v0.1.3
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking ascii v0.9.3
[INFO] [stderr]     Checking scopeguard v0.1.2
[INFO] [stderr]     Checking podio v0.1.7
[INFO] [stderr]     Checking entities v1.0.1
[INFO] [stderr]     Checking diffs v0.2.1
[INFO] [stderr]     Checking sha1 v0.6.0
[INFO] [stderr]     Checking downcast v0.9.2
[INFO] [stderr]     Checking census v0.1.1
[INFO] [stderr]     Checking typed-arena v1.7.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/downcast-0.9.2/src/lib.rs:120:38
[INFO] [stdout]     |
[INFO] [stdout] 120 |     fn is_type(&self) -> bool { self.type_id() == TypeId::of::<T>() }
[INFO] [stdout]     |                                      ^^^^^^^ multiple `type_id` found
[INFO] [stdout]     |
[INFO] [stdout] note: candidate #1 is defined in the trait `Any`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/downcast-0.9.2/src/lib.rs:29:5
[INFO] [stdout]     |
[INFO] [stdout] 29  |     fn type_id(&self) -> TypeId { TypeId::of::<Self>() }
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] note: candidate #2 is defined in the trait `std::any::Any`
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]     |
[INFO] [stdout] 120 |     fn is_type(&self) -> bool { Any::type_id(&self) == TypeId::of::<T>() }
[INFO] [stdout]     |                                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]     |
[INFO] [stdout] 120 |     fn is_type(&self) -> bool { std::any::Any::type_id(&self) == TypeId::of::<T>() }
[INFO] [stdout]     |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0034`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `downcast`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "3877e7c2c65ad9ee5c661f8fec9fd57b38a6258557f14c04e5e4963fa5ab9c65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3877e7c2c65ad9ee5c661f8fec9fd57b38a6258557f14c04e5e4963fa5ab9c65", kill_on_drop: false }`
[INFO] [stdout] 3877e7c2c65ad9ee5c661f8fec9fd57b38a6258557f14c04e5e4963fa5ab9c65