[INFO] fetching crate inari 0.4.0...
[INFO] documenting inari-0.4.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate inari 0.4.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate inari 0.4.0 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 inari 0.4.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate inari 0.4.0
[INFO] tweaked toml for crates.io crate inari 0.4.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate inari 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "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-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] [stdout] 42843759a8c29a07e94038bc2a21b552cd001d5d84e26ef023ac8272df0bf830
[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" "42843759a8c29a07e94038bc2a21b552cd001d5d84e26ef023ac8272df0bf830", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42843759a8c29a07e94038bc2a21b552cd001d5d84e26ef023ac8272df0bf830", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42843759a8c29a07e94038bc2a21b552cd001d5d84e26ef023ac8272df0bf830", kill_on_drop: false }`
[INFO] [stdout] 42843759a8c29a07e94038bc2a21b552cd001d5d84e26ef023ac8272df0bf830
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] [stdout] f7123bd484c101aeaf906c46c3a779d6f64543a3703d07cb533471c3511cc340
[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" "f7123bd484c101aeaf906c46c3a779d6f64543a3703d07cb533471c3511cc340", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.3.1
[INFO] [stderr]    Compiling proc-macro-hack-impl v0.3.3
[INFO] [stderr]    Compiling rug v1.10.0
[INFO] [stderr]    Compiling hexf-parse v0.1.0
[INFO] [stderr]     Checking az v1.0.0
[INFO] [stderr]     Checking nom v5.1.2
[INFO] [stderr]    Compiling proc-macro-hack v0.3.3
[INFO] [stderr]    Compiling hexf-impl v0.1.0
[INFO] [stderr]     Checking hexf v0.1.0
[INFO] [stderr]  Documenting inari v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(asm)]
[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 `inari`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name inari src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="gmp"' --cfg 'feature="gmp-mpfr-sys"' --cfg 'feature="nom"' --cfg 'feature="rug"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern gmp_mpfr_sys=/opt/rustwide/target/debug/deps/libgmp_mpfr_sys-ddf9c73c715755a8.rmeta --extern hexf=/opt/rustwide/target/debug/deps/libhexf-b55fef002fce49e8.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-64d43ed492734023.rmeta --extern rug=/opt/rustwide/target/debug/deps/librug-d2444dde2064953c.rmeta --extern static_assertions=/opt/rustwide/target/debug/deps/libstatic_assertions-c6fada7e75b57fb2.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "f7123bd484c101aeaf906c46c3a779d6f64543a3703d07cb533471c3511cc340", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7123bd484c101aeaf906c46c3a779d6f64543a3703d07cb533471c3511cc340", kill_on_drop: false }`
[INFO] [stdout] f7123bd484c101aeaf906c46c3a779d6f64543a3703d07cb533471c3511cc340