[INFO] fetching crate taikai 0.1.0...
[INFO] documenting taikai-0.1.0 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate taikai 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate taikai 0.1.0 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate taikai 0.1.0
[INFO] finished tweaking crates.io crate taikai 0.1.0
[INFO] tweaked toml for crates.io crate taikai 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+1.69.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tuple_utils v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 98e49a4461af8e110e56c0ec7d71645d6a3f0603e3dc89b877c22113ed188a59
[INFO] running `Command { std: "docker" "start" "-a" "98e49a4461af8e110e56c0ec7d71645d6a3f0603e3dc89b877c22113ed188a59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98e49a4461af8e110e56c0ec7d71645d6a3f0603e3dc89b877c22113ed188a59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98e49a4461af8e110e56c0ec7d71645d6a3f0603e3dc89b877c22113ed188a59", kill_on_drop: false }`
[INFO] [stdout] 98e49a4461af8e110e56c0ec7d71645d6a3f0603e3dc89b877c22113ed188a59
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTFLAGS=--cap-lints=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c8dadd9a806d32e9b709a3816cb5e7940dc930b318a0277233de40e7598064c4
[INFO] running `Command { std: "docker" "start" "-a" "c8dadd9a806d32e9b709a3816cb5e7940dc930b318a0277233de40e7598064c4", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling libc v0.2.142
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking gimli v0.27.2
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling backtrace v0.3.67
[INFO] [stderr]     Checking linked-hash-map v0.5.6
[INFO] [stderr]     Checking rustc-demangle v0.1.23
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking serde v1.0.160
[INFO] [stderr]     Checking unicode-segmentation v1.10.1
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking encoding_rs v0.8.32
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]     Checking heck v0.3.3
[INFO] [stderr]     Checking indexmap v1.9.3
[INFO] [stderr]     Checking object v0.30.3
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking syn v0.15.44
[INFO] [stderr]     Checking addr2line v0.19.0
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]     Checking serde_yaml v0.8.26
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]  Documenting taikai v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(custom_attribute)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: removed in favor of `#![register_tool]` and `#![register_attr]`
[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 E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `taikai`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type proc-macro --crate-name taikai src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=7d29ebd250433508 -L dependency=/opt/rustwide/target/debug/deps --extern encoding_rs=/opt/rustwide/target/debug/deps/libencoding_rs-9afdd5f0e7f79bf2.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-0fd1d887461d915b.rmeta --extern heck=/opt/rustwide/target/debug/deps/libheck-d51407732fa1ec9b.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-ca8616aa1afd648b.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-d52c00771e85a30b.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-1aae7ef5c2bf0fa9.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-0ec6b8dc00be09c9.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-1e3f81b92e3ccf1e.so --extern serde_yaml=/opt/rustwide/target/debug/deps/libserde_yaml-38de8dc3fecfa137.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-2cd6ea1039240374.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "c8dadd9a806d32e9b709a3816cb5e7940dc930b318a0277233de40e7598064c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8dadd9a806d32e9b709a3816cb5e7940dc930b318a0277233de40e7598064c4", kill_on_drop: false }`
[INFO] [stdout] c8dadd9a806d32e9b709a3816cb5e7940dc930b318a0277233de40e7598064c4
