[INFO] fetching crate ws-async 0.1.0...
[INFO] documenting ws-async-0.1.0 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate ws-async 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate ws-async 0.1.0 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ws-async 0.1.0
[INFO] finished tweaking crates.io crate ws-async 0.1.0
[INFO] tweaked toml for crates.io crate ws-async 0.1.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate ws-async 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 823eb20e7c9ac3f21edb3ae633ab67d95bcfd96dc0737e36ac301c4bb9323ee7
[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" "823eb20e7c9ac3f21edb3ae633ab67d95bcfd96dc0737e36ac301c4bb9323ee7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "823eb20e7c9ac3f21edb3ae633ab67d95bcfd96dc0737e36ac301c4bb9323ee7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "823eb20e7c9ac3f21edb3ae633ab67d95bcfd96dc0737e36ac301c4bb9323ee7", kill_on_drop: false }`
[INFO] [stdout] 823eb20e7c9ac3f21edb3ae633ab67d95bcfd96dc0737e36ac301c4bb9323ee7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a77761c3f23ed7dfa6b55cee59a5e3d04a623b690ce250ec8d125196d67090c1
[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" "a77761c3f23ed7dfa6b55cee59a5e3d04a623b690ce250ec8d125196d67090c1", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking getrandom v0.1.13
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking sha-1 v0.8.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling tokio-macros v0.2.0
[INFO] [stderr]    Compiling pin-project-internal v0.4.6
[INFO] [stderr]    Compiling async-stream-impl v0.2.0
[INFO] [stderr]     Checking tokio v0.2.4
[INFO] [stderr]     Checking async-stream v0.2.0
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]     Checking pin-project v0.4.6
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking h2 v0.2.1
[INFO] [stderr]     Checking futures-executor v0.3.1
[INFO] [stderr]     Checking futures v0.3.1
[INFO] [stderr]     Checking hyper v0.13.0
[INFO] [stderr]  Documenting ws-async v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_fn)]
[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 `ws-async`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name ws_async 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 async_stream=/opt/rustwide/target/debug/deps/libasync_stream-77f49635a04e07ac.rmeta --extern base64=/opt/rustwide/target/debug/deps/libbase64-df6c862ed9a2d128.rmeta --extern bytes=/opt/rustwide/target/debug/deps/libbytes-4587ae399b12d153.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-4586190171c54fc3.rmeta --extern hyper=/opt/rustwide/target/debug/deps/libhyper-50ca3bc759e79be8.rmeta --extern pin_project=/opt/rustwide/target/debug/deps/libpin_project-02fd8fdc6409ee7d.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-0bc8129309303380.rmeta --extern sha1=/opt/rustwide/target/debug/deps/libsha1-72f10fb48dd3be7d.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-3621969d91cac161.rmeta --extern tower_service=/opt/rustwide/target/debug/deps/libtower_service-c4443770076ec4d4.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "a77761c3f23ed7dfa6b55cee59a5e3d04a623b690ce250ec8d125196d67090c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a77761c3f23ed7dfa6b55cee59a5e3d04a623b690ce250ec8d125196d67090c1", kill_on_drop: false }`
[INFO] [stdout] a77761c3f23ed7dfa6b55cee59a5e3d04a623b690ce250ec8d125196d67090c1
