[INFO] cloning repository https://github.com/myuon/rustapp-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/myuon/rustapp-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmyuon%2Frustapp-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmyuon%2Frustapp-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 924184f767a47b0a7b16c1a76af7963ef5c898b9
[INFO] documenting myuon/rustapp-example against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmyuon%2Frustapp-example" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/myuon/rustapp-example 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 git repo https://github.com/myuon/rustapp-example
[INFO] finished tweaking git repo https://github.com/myuon/rustapp-example
[INFO] tweaked toml for git repo https://github.com/myuon/rustapp-example written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/myuon/rustapp-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a6707caf5686a17f61173f4b06fd29609c73592d9ea496a550f80f04e632603b
[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" "a6707caf5686a17f61173f4b06fd29609c73592d9ea496a550f80f04e632603b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a6707caf5686a17f61173f4b06fd29609c73592d9ea496a550f80f04e632603b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6707caf5686a17f61173f4b06fd29609c73592d9ea496a550f80f04e632603b", kill_on_drop: false }`
[INFO] [stdout] a6707caf5686a17f61173f4b06fd29609c73592d9ea496a550f80f04e632603b
[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" "+1.46.0" "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] 5371114f93546acd989e4ccf00685510c21285e2bee49648a934f1264d0197ae
[INFO] running `Command { std: "docker" "start" "-a" "5371114f93546acd989e4ccf00685510c21285e2bee49648a934f1264d0197ae", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling proc-macro2 v1.0.5
[INFO] [stderr]    Compiling cc v1.0.45
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling bitflags v1.2.0
[INFO] [stderr]     Checking indexmap v1.2.0
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]     Checking static_assertions v0.3.4
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking hashbrown v0.5.0
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking bit-vec v0.6.1
[INFO] [stderr]    Compiling mysql v16.1.0
[INFO] [stderr]     Checking bufstream v0.1.4
[INFO] [stderr]     Checking untrusted v0.7.0
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-bigint v0.2.3
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]     Checking futures01 v0.1.29
[INFO] [stderr]     Checking tokio-sync v0.1.6
[INFO] [stderr]     Checking miniz_oxide v0.3.3
[INFO] [stderr]     Checking block-padding v0.1.4
[INFO] [stderr]    Compiling mysqlclient-sys v0.2.4
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling lexical-core v0.4.6
[INFO] [stderr]    Compiling lexical v2.2.2
[INFO] [stderr]     Checking rand_chacha v0.1.1
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[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking sha2 v0.8.0
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
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[INFO] [stderr]    Compiling brotli-sys v0.3.2
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[INFO] [stderr]     Checking rand_core v0.5.1
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[INFO] [stderr]     Checking env_logger v0.7.0
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[INFO] [stderr]    Compiling derive_more v0.15.0
[INFO] [stderr]    Compiling enum-as-inner v0.2.1
[INFO] [stderr]    Compiling derive_more v0.14.1
[INFO] [stderr]    Compiling actix-web-codegen v0.1.2
[INFO] [stderr]    Compiling actix_derive v0.4.0
[INFO] [stderr]    Compiling diesel_derives v1.4.0
[INFO] [stderr]    Compiling synstructure v0.12.1
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling async-trait v0.1.13
[INFO] [stderr]     Checking failure v0.1.6
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[INFO] [stderr]     Checking dotenv v0.14.1
[INFO] [stderr]     Checking diesel v1.4.2
[INFO] [stderr]     Checking actix-threadpool v0.1.2
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[INFO] [stderr]     Checking actix-server v0.6.1
[INFO] [stderr]     Checking trust-dns-resolver v0.11.1
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[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking bigdecimal v0.1.0
[INFO] [stderr]     Checking rust_decimal v1.0.3
[INFO] [stderr]     Checking actix-router v0.1.5
[INFO] [stderr]     Checking actix-http v0.2.10
[INFO] [stderr]     Checking mysql_common v0.18.0
[INFO] [stderr]     Checking biscuit v0.3.1
[INFO] [stderr]     Checking r2d2_mysql v16.0.0
[INFO] [stderr]     Checking awc v0.2.7
[INFO] [stderr]     Checking actix v0.8.3
[INFO] [stderr]     Checking actix-web v1.0.8
[INFO] [stderr]  Documenting rustapp-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_closure)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `rustapp-example`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name rustapp_example src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern actix=/opt/rustwide/target/debug/deps/libactix-07fdb05c963dc64c.rmeta --extern actix_http=/opt/rustwide/target/debug/deps/libactix_http-399093150032a2f6.rmeta --extern actix_service=/opt/rustwide/target/debug/deps/libactix_service-9293f6e8db8866ff.rmeta --extern actix_web=/opt/rustwide/target/debug/deps/libactix_web-844b95f0f963aaf5.rmeta --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-6787bf92741a3e6e.so --extern bcrypt=/opt/rustwide/target/debug/deps/libbcrypt-8a326c2f8b536a31.rmeta --extern biscuit=/opt/rustwide/target/debug/deps/libbiscuit-8a6e5cb8ed44c847.rmeta --extern diesel=/opt/rustwide/target/debug/deps/libdiesel-795ad372fe9dba05.rmeta --extern dotenv=/opt/rustwide/target/debug/deps/libdotenv-33d3e152c84f7d0d.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-da9513faf721a58f.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-526545c817db9bfc.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-39f6adddddfdc760.rmeta --extern futures01=/opt/rustwide/target/debug/deps/libfutures01-0abe7e929f249225.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-f96ba0118540bef9.rmeta --extern mysql=/opt/rustwide/target/debug/deps/libmysql-3c6f23e0fad111d8.rmeta --extern r2d2=/opt/rustwide/target/debug/deps/libr2d2-97f146749da76733.rmeta --extern r2d2_mysql=/opt/rustwide/target/debug/deps/libr2d2_mysql-e546d5ec7494706d.rmeta --extern ring=/opt/rustwide/target/debug/deps/libring-4d0713fc1e44a048.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-390512ef9bd88c7c.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-0a8e1f0baa120981.rmeta --extern ulid=/opt/rustwide/target/debug/deps/libulid-d872750f6b5d11ec.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "5371114f93546acd989e4ccf00685510c21285e2bee49648a934f1264d0197ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5371114f93546acd989e4ccf00685510c21285e2bee49648a934f1264d0197ae", kill_on_drop: false }`
[INFO] [stdout] 5371114f93546acd989e4ccf00685510c21285e2bee49648a934f1264d0197ae