[INFO] cloning repository https://github.com/46bit/seequence
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/46bit/seequence" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F46bit%2Fseequence", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F46bit%2Fseequence'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f9177702944337f1156b84fe63a129a4374648dc
[INFO] documenting 46bit/seequence against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F46bit%2Fseequence" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/46bit/seequence 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 git repo https://github.com/46bit/seequence
[INFO] finished tweaking git repo https://github.com/46bit/seequence
[INFO] tweaked toml for git repo https://github.com/46bit/seequence written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/46bit/seequence already has a lockfile, it will not be regenerated
[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 ...
[INFO] [stderr]   Downloaded libc v0.2.20
[INFO] [stderr]   Downloaded quickcheck v0.2.27
[INFO] [stderr]   Downloaded serde_derive v0.9.7
[INFO] [stderr]   Downloaded itoa v0.3.1
[INFO] [stderr]   Downloaded uuid v0.3.1
[INFO] [stderr]   Downloaded serde v0.9.7
[INFO] [stderr]   Downloaded futures v0.1.10
[INFO] [stderr]   Downloaded miow v0.2.0
[INFO] [stderr]   Downloaded dtoa v0.4.1
[INFO] [stderr]   Downloaded serde_codegen_internals v0.13.0
[INFO] [stderr]   Downloaded syn v0.11.4
[INFO] [stderr]   Downloaded mio v0.6.4
[INFO] [stderr]   Downloaded serde_json v0.9.6
[INFO] [stderr]   Downloaded tokio-core v0.1.4
[INFO] [stderr]   Downloaded tokio-proto v0.1.0
[INFO] [stderr]   Downloaded quote v0.3.12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 491330b465484133b8862e6f91fd98203d61ed9afcd30b4fb83c29f1324d0a2a
[INFO] running `Command { std: "docker" "start" "-a" "491330b465484133b8862e6f91fd98203d61ed9afcd30b4fb83c29f1324d0a2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "491330b465484133b8862e6f91fd98203d61ed9afcd30b4fb83c29f1324d0a2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "491330b465484133b8862e6f91fd98203d61ed9afcd30b4fb83c29f1324d0a2a", kill_on_drop: false }`
[INFO] [stdout] 491330b465484133b8862e6f91fd98203d61ed9afcd30b4fb83c29f1324d0a2a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] fc629e0fcd1183a7da9fd6942cc34ab6be084027b37e4658b57e077a1e5c5c78
[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" "fc629e0fcd1183a7da9fd6942cc34ab6be084027b37e4658b57e077a1e5c5c78", 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] [stderr]     Checking libc v0.2.20
[INFO] [stderr]     Checking log v0.3.6
[INFO] [stderr]     Checking cfg-if v0.1.0
[INFO] [stderr]    Compiling quote v0.3.12
[INFO] [stderr]     Checking lazycell v0.4.0
[INFO] [stderr]     Checking scoped-tls v0.1.0
[INFO] [stderr]     Checking itoa v0.3.1
[INFO] [stderr]     Checking num-traits v0.1.36
[INFO] [stderr]     Checking dtoa v0.4.1
[INFO] [stderr]     Checking serde v0.9.7
[INFO] [stderr]     Checking futures v0.1.10
[INFO] [stderr]    Compiling syn v0.11.4
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking net2 v0.2.26
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking mio v0.6.4
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking uuid v0.3.1
[INFO] [stderr]     Checking tokio-service v0.1.0
[INFO] [stderr]     Checking tokio-core v0.1.4
[INFO] [stderr]    Compiling serde_codegen_internals v0.13.0
[INFO] [stderr]     Checking tokio-proto v0.1.0
[INFO] [stderr]     Checking env_logger v0.3.5
[INFO] [stderr]    Compiling serde_derive v0.9.7
[INFO] [stderr]     Checking serde_json v0.9.6
[INFO] [stderr]  Documenting seequence v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(custom_attribute)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: removed in favor of `#![register_tool]` and `#![register_attr]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(custom_attribute)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `seequence`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name seequence 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 ansi_term=/opt/rustwide/target/debug/deps/libansi_term-7e12d903d4ce5dd5.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-a985d201202949ee.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-fc823eef3d5af0c1.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-c1f95636fd055e26.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-a56dfa3954fd4891.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-1ad1dab1f99e0aa1.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-e14398c6ac9abf26.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-086dbbb990ec8e43.rmeta --extern tokio_core=/opt/rustwide/target/debug/deps/libtokio_core-9f5d6c694618b619.rmeta --extern tokio_proto=/opt/rustwide/target/debug/deps/libtokio_proto-9a962b44a7128a90.rmeta --extern tokio_service=/opt/rustwide/target/debug/deps/libtokio_service-b1be3cd11cdad60f.rmeta --extern uuid=/opt/rustwide/target/debug/deps/libuuid-4b97fe0d2c3cd883.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "fc629e0fcd1183a7da9fd6942cc34ab6be084027b37e4658b57e077a1e5c5c78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc629e0fcd1183a7da9fd6942cc34ab6be084027b37e4658b57e077a1e5c5c78", kill_on_drop: false }`
[INFO] [stdout] fc629e0fcd1183a7da9fd6942cc34ab6be084027b37e4658b57e077a1e5c5c78