[INFO] cloning repository https://github.com/chc4/kingfisher
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chc4/kingfisher" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchc4%2Fkingfisher", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchc4%2Fkingfisher'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0379c0ced6ae5ded99f816d8f73d005db7700d4a
[INFO] documenting chc4/kingfisher 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%2Fchc4%2Fkingfisher" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chc4/kingfisher 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/chc4/kingfisher
[INFO] finished tweaking git repo https://github.com/chc4/kingfisher
[INFO] tweaked toml for git repo https://github.com/chc4/kingfisher written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/chc4/kingfisher 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 lalrpop-util v0.16.1
[INFO] [stderr]   Downloaded lalrpop v0.16.1
[INFO] [stderr]   Downloaded docopt v1.0.1
[INFO] [stderr]   Downloaded rental v0.5.2
[INFO] [stderr]   Downloaded syn v0.15.15
[INFO] [stderr]   Downloaded rental-impl v0.5.2
[INFO] [stderr]   Downloaded ena v0.10.1
[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" "+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] 5c3aeea6666a186ab61aa0e80b06c720ab35440b479aeb95d687914b0739ca1b
[INFO] running `Command { std: "docker" "start" "-a" "5c3aeea6666a186ab61aa0e80b06c720ab35440b479aeb95d687914b0739ca1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c3aeea6666a186ab61aa0e80b06c720ab35440b479aeb95d687914b0739ca1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c3aeea6666a186ab61aa0e80b06c720ab35440b479aeb95d687914b0739ca1b", kill_on_drop: false }`
[INFO] [stdout] 5c3aeea6666a186ab61aa0e80b06c720ab35440b479aeb95d687914b0739ca1b
[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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0ea2b4b5e3a40a594f9a585b967666e8e68dfc0d95147badd26bf5d2f57d122d
[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" "0ea2b4b5e3a40a594f9a585b967666e8e68dfc0d95147badd26bf5d2f57d122d", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg-if v0.1.6
[INFO] [stderr]    Compiling byte-tools v0.3.0
[INFO] [stderr]    Compiling byteorder v1.2.7
[INFO] [stderr]    Compiling utf8-ranges v1.0.1
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling term v0.4.6
[INFO] [stderr]    Compiling opaque-debug v0.2.1
[INFO] [stderr]    Compiling ordermap v0.3.5
[INFO] [stderr]    Compiling fixedbitset v0.1.9
[INFO] [stderr]    Compiling bit-vec v0.5.0
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling lalrpop-util v0.16.1
[INFO] [stderr]    Compiling diff v0.1.11
[INFO] [stderr]    Compiling phf_shared v0.7.23
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling regex-syntax v0.6.2
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling block-padding v0.1.2
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.1
[INFO] [stderr]    Compiling serde v1.0.80
[INFO] [stderr]    Compiling itertools v0.7.8
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]    Compiling phf_generator v0.7.23
[INFO] [stderr]    Compiling memchr v2.1.0
[INFO] [stderr]    Compiling ena v0.10.1
[INFO] [stderr]    Compiling generic-array v0.12.0
[INFO] [stderr]    Compiling bit-set v0.5.0
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling syn v0.15.15
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling petgraph v0.4.13
[INFO] [stderr]    Compiling ascii-canvas v1.0.0
[INFO] [stderr]    Compiling aho-corasick v0.6.8
[INFO] [stderr]    Compiling block-buffer v0.7.0
[INFO] [stderr]    Compiling digest v0.8.0
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling regex v1.0.5
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling rental-impl v0.5.2
[INFO] [stderr]    Compiling docopt v1.0.1
[INFO] [stderr]    Compiling lalrpop v0.16.1
[INFO] [stderr]     Checking rental v0.5.2
[INFO] [stderr]    Compiling kingfisher v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting kingfisher v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0437]: type `Target` is not a member of trait `std::ops::DerefMut`
[INFO] [stdout]   --> src/main.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     type Target = Box<Far>;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^ not a member of trait `std::ops::DerefMut`
[INFO] [stdout] 
[INFO] [stdout] 
[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(option_replace)]
[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] Some errors have detailed explanations: E0437, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0437`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `kingfisher`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name kingfisher 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 lalrpop_util=/opt/rustwide/target/debug/deps/liblalrpop_util-c16b88b3b4145d37.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-d605945db89a0714.rmeta --extern rental=/opt/rustwide/target/debug/deps/librental-a7bd61898d830fdc.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "0ea2b4b5e3a40a594f9a585b967666e8e68dfc0d95147badd26bf5d2f57d122d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ea2b4b5e3a40a594f9a585b967666e8e68dfc0d95147badd26bf5d2f57d122d", kill_on_drop: false }`
[INFO] [stdout] 0ea2b4b5e3a40a594f9a585b967666e8e68dfc0d95147badd26bf5d2f57d122d