[INFO] fetching crate rustls-extra 0.15.0...
[INFO] documenting rustls-extra-0.15.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate rustls-extra 0.15.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate rustls-extra 0.15.0 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 crates.io crate rustls-extra 0.15.0
[INFO] finished tweaking crates.io crate rustls-extra 0.15.0
[INFO] tweaked toml for crates.io crate rustls-extra 0.15.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] aa0d845f9a47e9c6cae1d7ed216071841db07ce5443bd2da10d22a5d4fbb61f2
[INFO] running `Command { std: "docker" "start" "-a" "aa0d845f9a47e9c6cae1d7ed216071841db07ce5443bd2da10d22a5d4fbb61f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa0d845f9a47e9c6cae1d7ed216071841db07ce5443bd2da10d22a5d4fbb61f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa0d845f9a47e9c6cae1d7ed216071841db07ce5443bd2da10d22a5d4fbb61f2", kill_on_drop: false }`
[INFO] [stdout] aa0d845f9a47e9c6cae1d7ed216071841db07ce5443bd2da10d22a5d4fbb61f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] c6e0e3a0b491bbe501e8503f2f74c906e2c324c2befdf6c8abf12ccb2456ce9f
[INFO] running `Command { std: "docker" "start" "-a" "c6e0e3a0b491bbe501e8503f2f74c906e2c324c2befdf6c8abf12ccb2456ce9f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]     Checking likely v0.1.0
[INFO] [stderr]     Checking ring v0.14.6
[INFO] [stderr]     Checking sct v0.5.0
[INFO] [stderr]     Checking webpki v0.19.1
[INFO] [stderr]     Checking ct-logs v0.5.1
[INFO] [stderr]     Checking rustls v0.15.2
[INFO] [stderr]  Documenting rustls-extra v0.15.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(core_intrinsics)]
[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 `rustls-extra`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name rustls_extra 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 ct_logs=/opt/rustwide/target/debug/deps/libct_logs-c50c51f213f14407.rmeta --extern indexmap=/opt/rustwide/target/debug/deps/libindexmap-a0b6c0739e0c898d.rmeta --extern likely=/opt/rustwide/target/debug/deps/liblikely-e6fed3a73798da9a.rmeta --extern rustls=/opt/rustwide/target/debug/deps/librustls-eca43e74460cc347.rmeta --extern webpki=/opt/rustwide/target/debug/deps/libwebpki-6d6c76b227776499.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "c6e0e3a0b491bbe501e8503f2f74c906e2c324c2befdf6c8abf12ccb2456ce9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6e0e3a0b491bbe501e8503f2f74c906e2c324c2befdf6c8abf12ccb2456ce9f", kill_on_drop: false }`
[INFO] [stdout] c6e0e3a0b491bbe501e8503f2f74c906e2c324c2befdf6c8abf12ccb2456ce9f