[INFO] fetching crate unsplash-rs 0.1.1...
[INFO] documenting unsplash-rs-0.1.1 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate unsplash-rs 0.1.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate unsplash-rs 0.1.1 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 unsplash-rs 0.1.1
[INFO] finished tweaking crates.io crate unsplash-rs 0.1.1
[INFO] tweaked toml for crates.io crate unsplash-rs 0.1.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 076b2a1b1e101f60579c8a5d16fae404304a630fcdfbc5a3560f05ca463867b8
[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" "076b2a1b1e101f60579c8a5d16fae404304a630fcdfbc5a3560f05ca463867b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "076b2a1b1e101f60579c8a5d16fae404304a630fcdfbc5a3560f05ca463867b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "076b2a1b1e101f60579c8a5d16fae404304a630fcdfbc5a3560f05ca463867b8", kill_on_drop: false }`
[INFO] [stdout] 076b2a1b1e101f60579c8a5d16fae404304a630fcdfbc5a3560f05ca463867b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 24e39b90232f84beef66a582c7d46a23bb86c254def83d405fa798f8808a6818
[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" "24e39b90232f84beef66a582c7d46a23bb86c254def83d405fa798f8808a6818", kill_on_drop: false }`
[INFO] [stderr]     Checking serde_url_params v0.1.1
[INFO] [stderr]  Documenting unsplash-rs 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(option_replace)]
[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 `unsplash-rs`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name unsplash_rs 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 chrono=/opt/rustwide/target/debug/deps/libchrono-adc7095fc110dda4.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-fa85c9e222265e84.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-2f80a151d70e23d0.rmeta --extern hyper=/opt/rustwide/target/debug/deps/libhyper-3718952360ade36a.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-df55ac3921f5f17c.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-72923b2d9aa06af7.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-4d9b6dc7228ae14f.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-eb6cdf579abc545a.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-cd17107806a312ab.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-f8005010863b8bba.rmeta --extern serde_url_params=/opt/rustwide/target/debug/deps/libserde_url_params-9c76af5e08022a81.rmeta --cap-lints=warn --crate-version 0.1.1` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "24e39b90232f84beef66a582c7d46a23bb86c254def83d405fa798f8808a6818", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24e39b90232f84beef66a582c7d46a23bb86c254def83d405fa798f8808a6818", kill_on_drop: false }`
[INFO] [stdout] 24e39b90232f84beef66a582c7d46a23bb86c254def83d405fa798f8808a6818
