[INFO] cloning repository https://github.com/Aidiakapi/advent_of_code_2018
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Aidiakapi/advent_of_code_2018" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAidiakapi%2Fadvent_of_code_2018", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAidiakapi%2Fadvent_of_code_2018'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4c6e8ca88a138a857b66e7b2c010da5230e950ec
[INFO] documenting Aidiakapi/advent_of_code_2018 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAidiakapi%2Fadvent_of_code_2018" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Aidiakapi/advent_of_code_2018 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Aidiakapi/advent_of_code_2018
[INFO] finished tweaking git repo https://github.com/Aidiakapi/advent_of_code_2018
[INFO] tweaked toml for git repo https://github.com/Aidiakapi/advent_of_code_2018 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/Aidiakapi/advent_of_code_2018 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_json v1.0.34
[INFO] [stderr]   Downloaded bincode v1.0.1
[INFO] [stderr]   Downloaded reqwest v0.9.8
[INFO] [stderr]   Downloaded encoding_rs v0.8.12
[INFO] [stderr]   Downloaded twoway v0.2.0
[INFO] [stderr]   Downloaded serde v1.0.84
[INFO] [stderr]   Downloaded regex-syntax v0.6.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+beta-2020-08-29" "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] a786fde690093e1606c9cd01a1e5f19031da5ddefd9dff9d1befd21a168b43b5
[INFO] running `Command { std: "docker" "start" "-a" "a786fde690093e1606c9cd01a1e5f19031da5ddefd9dff9d1befd21a168b43b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a786fde690093e1606c9cd01a1e5f19031da5ddefd9dff9d1befd21a168b43b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a786fde690093e1606c9cd01a1e5f19031da5ddefd9dff9d1befd21a168b43b5", kill_on_drop: false }`
[INFO] [stdout] a786fde690093e1606c9cd01a1e5f19031da5ddefd9dff9d1befd21a168b43b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9ec69f408f65ed7390ed94e90e07624cda4171b1bd8c769ac65c713050963306
[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" "9ec69f408f65ed7390ed94e90e07624cda4171b1bd8c769ac65c713050963306", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]     Checking cfg-if v0.1.6
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]     Checking futures v0.1.25
[INFO] [stderr]     Checking lazy_static v1.2.0
[INFO] [stderr]     Checking byteorder v1.2.7
[INFO] [stderr]     Checking slab v0.4.1
[INFO] [stderr]    Compiling cc v1.0.25
[INFO] [stderr]     Checking itoa v0.4.3
[INFO] [stderr]     Checking lazycell v1.2.0
[INFO] [stderr]    Compiling serde v1.0.84
[INFO] [stderr]     Checking indexmap v1.0.2
[INFO] [stderr]    Compiling openssl v0.10.15
[INFO] [stderr]    Compiling httparse v1.3.3
[INFO] [stderr]    Compiling build_const v0.2.1
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking string v0.1.2
[INFO] [stderr]    Compiling native-tls v0.2.2
[INFO] [stderr]     Checking unicode-normalization v0.1.7
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling encoding_rs v0.8.12
[INFO] [stderr]     Checking dtoa v0.4.3
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]     Checking unchecked-index v0.2.2
[INFO] [stderr]     Checking utf8-ranges v1.0.2
[INFO] [stderr]     Checking fixedbitset v0.1.9
[INFO] [stderr]     Checking permutohedron v0.2.4
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling unicase v2.2.0
[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking arrayvec v0.4.8
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking crossbeam-utils v0.6.1
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking colored v1.7.0
[INFO] [stderr]    Compiling rand_core v0.2.2
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.0
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]     Checking base64 v0.10.0
[INFO] [stderr]     Checking regex-syntax v0.6.3
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]     Checking smallvec v0.6.7
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.0
[INFO] [stderr]    Compiling rand v0.6.1
[INFO] [stderr]     Checking crossbeam-epoch v0.6.1
[INFO] [stderr]    Compiling phf_shared v0.7.23
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]     Checking crossbeam-deque v0.6.2
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking rand v0.4.3
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking phf v0.7.23
[INFO] [stderr]     Checking tokio-executor v0.1.5
[INFO] [stderr]     Checking want v0.0.6
[INFO] [stderr]     Checking bytes v0.4.11
[INFO] [stderr]     Checking mime v0.3.12
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking libflate v0.1.18
[INFO] [stderr]     Checking mio v0.6.16
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking aho-corasick v0.6.9
[INFO] [stderr]     Checking twoway v0.2.0
[INFO] [stderr]     Checking tokio-timer v0.2.8
[INFO] [stderr]     Checking tokio-current-thread v0.1.4
[INFO] [stderr]     Checking pathfinding v1.1.10
[INFO] [stderr]    Compiling openssl-sys v0.9.39
[INFO] [stderr]    Compiling phf_generator v0.7.23
[INFO] [stderr]     Checking uuid v0.7.1
[INFO] [stderr]     Checking tokio-io v0.1.10
[INFO] [stderr]     Checking http v0.1.14
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]    Compiling phf_codegen v0.7.23
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.6
[INFO] [stderr]     Checking tokio-reactor v0.1.7
[INFO] [stderr]     Checking tokio-threadpool v0.1.9
[INFO] [stderr]     Checking tokio-tcp v0.1.2
[INFO] [stderr]     Checking tokio v0.1.14
[INFO] [stderr]     Checking h2 v0.1.13
[INFO] [stderr]     Checking serde_json v1.0.34
[INFO] [stderr]     Checking serde_urlencoded v0.5.4
[INFO] [stderr]     Checking bincode v1.0.1
[INFO] [stderr]     Checking hyper v0.12.20
[INFO] [stderr]     Checking hyper-tls v0.3.1
[INFO] [stderr]     Checking reqwest v0.9.8
[INFO] [stderr]  Documenting advent_of_code_2018 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(stmt_expr_attributes, drain_filter, try_from)]
[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 `advent_of_code_2018`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name advent_of_code_2018 src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern ansi_term=/opt/rustwide/target/debug/deps/libansi_term-2b8e18b803626c5c.rmeta --extern bincode=/opt/rustwide/target/debug/deps/libbincode-03084f31661e3695.rmeta --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-b4796cc9d79cc3b4.rmeta --extern colored=/opt/rustwide/target/debug/deps/libcolored-7f249f1f479d722a.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-37a9dbddb08ad827.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-d9b4b658eae13ced.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-531e13050262d2f6.rmeta --extern pathfinding=/opt/rustwide/target/debug/deps/libpathfinding-e0644a550f54bedc.rmeta --extern permutohedron=/opt/rustwide/target/debug/deps/libpermutohedron-0ced619323eba3ff.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-a3e6e5cc744ac9f2.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-ac73db5e5dc3beb4.rmeta --extern crypto=/opt/rustwide/target/debug/deps/libcrypto-dd5d3d0a9893bdcd.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-98f8f0a0313f2a0b.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-51c031c6351f5b37.rmeta --extern smallvec=/opt/rustwide/target/debug/deps/libsmallvec-c4de33610072e3cb.rmeta --extern twoway=/opt/rustwide/target/debug/deps/libtwoway-684ab18930b1add0.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "9ec69f408f65ed7390ed94e90e07624cda4171b1bd8c769ac65c713050963306", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ec69f408f65ed7390ed94e90e07624cda4171b1bd8c769ac65c713050963306", kill_on_drop: false }`
[INFO] [stdout] 9ec69f408f65ed7390ed94e90e07624cda4171b1bd8c769ac65c713050963306