[INFO] cloning repository https://github.com/akitsu-sanae/microps-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/akitsu-sanae/microps-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fakitsu-sanae%2Fmicrops-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fakitsu-sanae%2Fmicrops-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e217d2110e402a8a49909f08ea26725e2a9350cf
[INFO] documenting akitsu-sanae/microps-rs against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fakitsu-sanae%2Fmicrops-rs" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/akitsu-sanae/microps-rs 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 git repo https://github.com/akitsu-sanae/microps-rs
[INFO] finished tweaking git repo https://github.com/akitsu-sanae/microps-rs
[INFO] tweaked toml for git repo https://github.com/akitsu-sanae/microps-rs written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/akitsu-sanae/microps-rs 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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] be0a4011a73098e6405536e57db8e7f41c3f9cee4a8f67ecd031157faf5b3e96
[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" "be0a4011a73098e6405536e57db8e7f41c3f9cee4a8f67ecd031157faf5b3e96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be0a4011a73098e6405536e57db8e7f41c3f9cee4a8f67ecd031157faf5b3e96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be0a4011a73098e6405536e57db8e7f41c3f9cee4a8f67ecd031157faf5b3e96", kill_on_drop: false }`
[INFO] [stdout] be0a4011a73098e6405536e57db8e7f41c3f9cee4a8f67ecd031157faf5b3e96
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] b654086681758a2fb8fa1c1ab29bd02ea507f6c2f6bf727f43d8a30dd888be6f
[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" "b654086681758a2fb8fa1c1ab29bd02ea507f6c2f6bf727f43d8a30dd888be6f", kill_on_drop: false }`
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]     Checking odds v0.2.26
[INFO] [stderr]     Checking getrandom v0.1.12
[INFO] [stderr]     Checking ifstructs v0.1.1
[INFO] [stderr]     Checking nix v0.15.0
[INFO] [stderr]     Checking chrono v0.4.9
[INFO] [stderr]     Checking arrayvec v0.4.11
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking arrayvec v0.3.25
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking hexdump v0.1.0
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]  Documenting microps-rs v0.1.0 (/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(wait_timeout_until)]
[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(drain_filter)]
[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 `microps-rs`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name microps_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 arrayvec=/opt/rustwide/target/debug/deps/libarrayvec-f5a4eb805fab946b.rmeta --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-bef5630b82c3f945.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-6b650effe88b0c5a.rmeta --extern hexdump=/opt/rustwide/target/debug/deps/libhexdump-e4aec3e1468ce019.rmeta --extern ifstructs=/opt/rustwide/target/debug/deps/libifstructs-8fb65a24c0edd641.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-57a7edc7f441d44c.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-9b2477d0b4d0e944.rmeta --extern nix=/opt/rustwide/target/debug/deps/libnix-b37dc982fba5a414.rmeta --extern uuid=/opt/rustwide/target/debug/deps/libuuid-a33258827d798f3b.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "b654086681758a2fb8fa1c1ab29bd02ea507f6c2f6bf727f43d8a30dd888be6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b654086681758a2fb8fa1c1ab29bd02ea507f6c2f6bf727f43d8a30dd888be6f", kill_on_drop: false }`
[INFO] [stdout] b654086681758a2fb8fa1c1ab29bd02ea507f6c2f6bf727f43d8a30dd888be6f