[INFO] fetching crate khalas 0.2.0...
[INFO] documenting khalas-0.2.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate khalas 0.2.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate khalas 0.2.0 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 khalas 0.2.0
[INFO] finished tweaking crates.io crate khalas 0.2.0
[INFO] tweaked toml for crates.io crate khalas 0.2.0 written to /workspace/builds/worker-14/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 57131019d1af9ce44156c265c7e4099bf30ba5357dcce55174e2ba98586b701e
[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" "57131019d1af9ce44156c265c7e4099bf30ba5357dcce55174e2ba98586b701e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "57131019d1af9ce44156c265c7e4099bf30ba5357dcce55174e2ba98586b701e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57131019d1af9ce44156c265c7e4099bf30ba5357dcce55174e2ba98586b701e", kill_on_drop: false }`
[INFO] [stdout] 57131019d1af9ce44156c265c7e4099bf30ba5357dcce55174e2ba98586b701e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 6628528791c3db0ad3f9dcaa10fcb7ddef831659c04b3c48349480ef4cde2195
[INFO] running `Command { std: "docker" "start" "-a" "6628528791c3db0ad3f9dcaa10fcb7ddef831659c04b3c48349480ef4cde2195", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling wasm-bindgen v0.2.67
[INFO] [stderr]    Compiling pulldown-cmark v0.6.1
[INFO] [stderr]     Checking enclose v1.1.8
[INFO] [stderr]    Compiling seed v0.6.0
[INFO] [stderr]    Compiling dbg v1.0.4
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.67
[INFO] [stderr]    Compiling derive_rich v0.2.2
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]    Compiling palette v0.4.1
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.67
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.67
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]    Compiling palette_derive v0.4.1
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking js-sys v0.3.44
[INFO] [stderr]     Checking console_error_panic_hook v0.1.6
[INFO] [stderr]     Checking web-sys v0.3.44
[INFO] [stderr]     Checking wasm-bindgen-futures v0.4.17
[INFO] [stderr]     Checking gloo-timers v0.2.1
[INFO] [stderr]  Documenting khalas v0.2.0 (/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(decl_macro)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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(bool_to_option)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `khalas`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name khalas 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 derive_more=/opt/rustwide/target/debug/deps/libderive_more-2d6018cdd507f818.so --extern derive_rich=/opt/rustwide/target/debug/deps/libderive_rich-ebadff15d23f488e.so --extern indexmap=/opt/rustwide/target/debug/deps/libindexmap-a0b6c0739e0c898d.rmeta --extern palette=/opt/rustwide/target/debug/deps/libpalette-81143538e4a5ff7f.rmeta --extern seed=/opt/rustwide/target/debug/deps/libseed-56067a47cd660b67.rmeta --extern wasm_bindgen=/opt/rustwide/target/debug/deps/libwasm_bindgen-c1840ab9854b1316.rmeta --extern web_sys=/opt/rustwide/target/debug/deps/libweb_sys-ee88e9c9c9d39d38.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "6628528791c3db0ad3f9dcaa10fcb7ddef831659c04b3c48349480ef4cde2195", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6628528791c3db0ad3f9dcaa10fcb7ddef831659c04b3c48349480ef4cde2195", kill_on_drop: false }`
[INFO] [stdout] 6628528791c3db0ad3f9dcaa10fcb7ddef831659c04b3c48349480ef4cde2195