[INFO] fetching crate lamport_signature 0.1.4...
[INFO] documenting lamport_signature-0.1.4 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate lamport_signature 0.1.4 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate lamport_signature 0.1.4 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 lamport_signature 0.1.4
[INFO] finished tweaking crates.io crate lamport_signature 0.1.4
[INFO] tweaked toml for crates.io crate lamport_signature 0.1.4 written to /workspace/builds/worker-11/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-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9c084d69c71b70d7117b3915a5f8b8c4c98a6a2f2965750e1a042a073c8fc727
[INFO] running `Command { std: "docker" "start" "-a" "9c084d69c71b70d7117b3915a5f8b8c4c98a6a2f2965750e1a042a073c8fc727", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9c084d69c71b70d7117b3915a5f8b8c4c98a6a2f2965750e1a042a073c8fc727", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c084d69c71b70d7117b3915a5f8b8c4c98a6a2f2965750e1a042a073c8fc727", kill_on_drop: false }`
[INFO] [stdout] 9c084d69c71b70d7117b3915a5f8b8c4c98a6a2f2965750e1a042a073c8fc727
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] 198d2c5d2236da5669370e6e1e035ac242f34e1496e536c970c6ade476e274cf
[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" "198d2c5d2236da5669370e6e1e035ac242f34e1496e536c970c6ade476e274cf", kill_on_drop: false }`
[INFO] [stderr]  Documenting lamport_signature v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | #![feature(test, iterator_flatten)]
[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 `lamport_signature`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name lamport_signature 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 digest=/opt/rustwide/target/debug/deps/libdigest-84519d40720717f8.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-48fbfd5d624c4cb9.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-eac865bbb6348113.rmeta --extern typenum=/opt/rustwide/target/debug/deps/libtypenum-30a64c794105ca2b.rmeta --cap-lints=warn --crate-version 0.1.4` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "198d2c5d2236da5669370e6e1e035ac242f34e1496e536c970c6ade476e274cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "198d2c5d2236da5669370e6e1e035ac242f34e1496e536c970c6ade476e274cf", kill_on_drop: false }`
[INFO] [stdout] 198d2c5d2236da5669370e6e1e035ac242f34e1496e536c970c6ade476e274cf
