[INFO] fetching crate string_cache_plugin 0.1.10...
[INFO] documenting string_cache_plugin-0.1.10 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate string_cache_plugin 0.1.10 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate string_cache_plugin 0.1.10 on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate string_cache_plugin 0.1.10
[INFO] removed path dependency string_cache_shared from crates.io crate string_cache_plugin 0.1.10
[INFO] finished tweaking crates.io crate string_cache_plugin 0.1.10
[INFO] tweaked toml for crates.io crate string_cache_plugin 0.1.10 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "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" "+1.46.0" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b49e9aecc44e10064d58b7739c29b8af90eb965983d95f1ffae399b9799565c8
[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" "b49e9aecc44e10064d58b7739c29b8af90eb965983d95f1ffae399b9799565c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b49e9aecc44e10064d58b7739c29b8af90eb965983d95f1ffae399b9799565c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b49e9aecc44e10064d58b7739c29b8af90eb965983d95f1ffae399b9799565c8", kill_on_drop: false }`
[INFO] [stdout] b49e9aecc44e10064d58b7739c29b8af90eb965983d95f1ffae399b9799565c8
[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" "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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aa5d6b8ffc7aef4bb8d9ae35737279873a477718c81a594beb6960b81768ed75
[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" "aa5d6b8ffc7aef4bb8d9ae35737279873a477718c81a594beb6960b81768ed75", kill_on_drop: false }`
[INFO] [stderr]     Checking mac v0.0.2
[INFO] [stderr]     Checking debug_unreachable v0.0.6
[INFO] [stderr]    Compiling string_cache_shared v0.1.12
[INFO] [stderr]  Documenting string_cache_plugin v0.1.10 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]   --> src/lib.rs:13:30
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![feature(plugin_registrar, quote, box_syntax)]
[INFO] [stdout]    |                              ^^^^^ feature has been removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `string_cache_plugin`.
[INFO] [stdout] error[E0463]: can't find crate for `syntax`
[INFO] [stdout]   --> src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | extern crate syntax;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] Some errors have detailed explanations: E0463, E0557.
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type dylib --crate-name string_cache_plugin src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-8bd18a5f68acc69b.rmeta --extern mac=/opt/rustwide/target/debug/deps/libmac-3881e9f90bf7cb8f.rmeta --extern string_cache_shared=/opt/rustwide/target/debug/deps/libstring_cache_shared-37990bdffda5cedc.rmeta --cap-lints=warn` (exit code: 1)
[INFO] [stdout] For more information about an error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "aa5d6b8ffc7aef4bb8d9ae35737279873a477718c81a594beb6960b81768ed75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa5d6b8ffc7aef4bb8d9ae35737279873a477718c81a594beb6960b81768ed75", kill_on_drop: false }`
[INFO] [stdout] aa5d6b8ffc7aef4bb8d9ae35737279873a477718c81a594beb6960b81768ed75