[INFO] fetching crate forecast-async 0.1.1...
[INFO] documenting forecast-async-0.1.1 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate forecast-async 0.1.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate forecast-async 0.1.1 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate forecast-async 0.1.1
[INFO] finished tweaking crates.io crate forecast-async 0.1.1
[INFO] tweaked toml for crates.io crate forecast-async 0.1.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 94813bbb0cb933e13e8e03b8ae6e2bbd764df8adae25a862438c591b734e7f1b
[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" "94813bbb0cb933e13e8e03b8ae6e2bbd764df8adae25a862438c591b734e7f1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "94813bbb0cb933e13e8e03b8ae6e2bbd764df8adae25a862438c591b734e7f1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94813bbb0cb933e13e8e03b8ae6e2bbd764df8adae25a862438c591b734e7f1b", kill_on_drop: false }`
[INFO] [stdout] 94813bbb0cb933e13e8e03b8ae6e2bbd764df8adae25a862438c591b734e7f1b
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "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] b36352902735e47a16d0e108343a3d1e921ea97b4aa0edd9f8385a1c61089a33
[INFO] running `Command { std: "docker" "start" "-a" "b36352902735e47a16d0e108343a3d1e921ea97b4aa0edd9f8385a1c61089a33", kill_on_drop: false }`
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]     Checking hyper v0.12.36
[INFO] [stderr]     Checking hyper-tls v0.3.2
[INFO] [stderr]     Checking reqwest v0.9.24
[INFO] [stderr]  Documenting forecast-async v0.1.1 (/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(trait_alias)]
[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 `forecast-async`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name forecast_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 futures=/opt/rustwide/target/debug/deps/libfutures-533cf53875604e8f.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-c664997a180c200a.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-307f015cad559f4a.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-f34436159fac0af7.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-f282cc1f57f3d638.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-15555f2003f0c506.rmeta --cap-lints=warn --crate-version 0.1.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "b36352902735e47a16d0e108343a3d1e921ea97b4aa0edd9f8385a1c61089a33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b36352902735e47a16d0e108343a3d1e921ea97b4aa0edd9f8385a1c61089a33", kill_on_drop: false }`
[INFO] [stdout] b36352902735e47a16d0e108343a3d1e921ea97b4aa0edd9f8385a1c61089a33
