[INFO] fetching crate gauc 0.8.1...
[INFO] documenting gauc-0.8.1 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate gauc 0.8.1 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate gauc 0.8.1 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gauc 0.8.1
[INFO] finished tweaking crates.io crate gauc 0.8.1
[INFO] tweaked toml for crates.io crate gauc 0.8.1 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded memchr v1.0.2
[INFO] [stderr]   Downloaded serde_json v0.9.10
[INFO] [stderr]   Downloaded ctrlc v3.4.2
[INFO] [stderr]   Downloaded buf_redux v0.6.3
[INFO] [stderr]   Downloaded traitobject v0.1.0
[INFO] [stderr]   Downloaded modifier v0.1.0
[INFO] [stderr]   Downloaded persistent v0.3.0
[INFO] [stderr]   Downloaded route-recognizer v0.1.13
[INFO] [stderr]   Downloaded unsafe-any v0.4.2
[INFO] [stderr]   Downloaded router v0.5.1
[INFO] [stderr]   Downloaded num-complex v0.1.43
[INFO] [stderr]   Downloaded num-rational v0.1.42
[INFO] [stderr]   Downloaded multipart v0.12.0
[INFO] [stderr]   Downloaded hyper v0.10.16
[INFO] [stderr]   Downloaded serde v0.9.15
[INFO] [stderr]   Downloaded num-bigint v0.1.44
[INFO] [stderr]   Downloaded conduit-mime-types v0.7.3
[INFO] [stderr]   Downloaded mime_guess v1.8.8
[INFO] [stderr]   Downloaded iron v0.5.1
[INFO] [stderr]   Downloaded error v0.1.9
[INFO] [stderr]   Downloaded bodyparser v0.5.0
[INFO] [stderr]   Downloaded plugin v0.2.6
[INFO] [stderr]   Downloaded typemap v0.3.3
[INFO] [stderr]   Downloaded urlencoded v0.5.0
[INFO] [stderr]   Downloaded params v0.7.1
[INFO] [stderr]   Downloaded bodyparser v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7c141672f9aad234d81701f795221dc008a3668a609a42a1f5fac6e00f70c514
[INFO] running `Command { std: "docker" "start" "-a" "7c141672f9aad234d81701f795221dc008a3668a609a42a1f5fac6e00f70c514", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c141672f9aad234d81701f795221dc008a3668a609a42a1f5fac6e00f70c514", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c141672f9aad234d81701f795221dc008a3668a609a42a1f5fac6e00f70c514", kill_on_drop: false }`
[INFO] [stdout] 7c141672f9aad234d81701f795221dc008a3668a609a42a1f5fac6e00f70c514
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7540b2d7e0996b5adadfb93e716245022e86f661db2480712ee7a920cdf14849
[INFO] running `Command { std: "docker" "start" "-a" "7540b2d7e0996b5adadfb93e716245022e86f661db2480712ee7a920cdf14849", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking tinyvec_macros v0.1.1
[INFO] [stderr]     Checking traitobject v0.1.0
[INFO] [stderr]    Compiling httparse v1.8.0
[INFO] [stderr]     Checking matches v0.1.10
[INFO] [stderr]     Checking unicode-bidi v0.3.14
[INFO] [stderr]     Checking typeable v0.1.2
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking tinyvec v1.6.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]     Checking unsafe-any v0.4.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking safemem v0.3.3
[INFO] [stderr]     Checking typemap v0.3.3
[INFO] [stderr]     Checking language-tags v0.2.2
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]     Checking plugin v0.2.6
[INFO] [stderr]     Checking error v0.1.9
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking modifier v0.1.0
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]     Checking dtoa v0.2.2
[INFO] [stderr]     Checking itoa v0.1.1
[INFO] [stderr]     Checking serde v0.8.23
[INFO] [stderr]    Compiling serde v1.0.195
[INFO] [stderr]     Checking safemem v0.2.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking dtoa v0.4.8
[INFO] [stderr]     Checking itoa v0.3.4
[INFO] [stderr]     Checking ucd-util v0.1.10
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking serde v0.9.15
[INFO] [stderr]     Checking phf_shared v0.7.24
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking phf v0.7.24
[INFO] [stderr]     Checking unicode-width v0.1.11
[INFO] [stderr]     Checking unicode-normalization v0.1.22
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking utf8-ranges v1.0.5
[INFO] [stderr]     Checking bitflags v2.4.1
[INFO] [stderr]    Compiling serde_json v1.0.111
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking twoway v0.1.8
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking route-recognizer v0.1.13
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking ryu v1.0.16
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking itoa v1.0.10
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking conduit-mime-types v0.7.3
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking nix v0.27.1
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking buf_redux v0.6.3
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]     Checking hyper v0.10.16
[INFO] [stderr]     Checking serde_json v0.8.6
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking serde_json v0.9.10
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling mime_guess v1.8.8
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking ctrlc v3.4.2
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking iron v0.5.1
[INFO] [stderr]     Checking persistent v0.3.0
[INFO] [stderr]     Checking router v0.5.1
[INFO] [stderr]     Checking bodyparser v0.5.0
[INFO] [stderr]     Checking bodyparser v0.6.0
[INFO] [stderr]     Checking urlencoded v0.5.0
[INFO] [stderr]     Checking multipart v0.12.0
[INFO] [stderr]     Checking params v0.7.1
[INFO] [stderr]  Documenting gauc v0.8.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/client/mod.rs:411:29
[INFO] [stdout]     |
[INFO] [stdout] 411 |             gcmd.cmdflags = (1 << 16);  // LCB_CMDVIEWQUERY_F_INCLUDE_DOCS;
[INFO] [stdout]     |                             ^       ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 411 -             gcmd.cmdflags = (1 << 16);  // LCB_CMDVIEWQUERY_F_INCLUDE_DOCS;
[INFO] [stdout] 411 +             gcmd.cmdflags = 1 << 16;  // LCB_CMDVIEWQUERY_F_INCLUDE_DOCS;
[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:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `gauc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --crate-type lib --crate-name gauc src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=50cb43d89b640a3b -L dependency=/opt/rustwide/target/debug/deps --extern clap=/opt/rustwide/target/debug/deps/libclap-7cda37353f110956.rmeta --extern ctrlc=/opt/rustwide/target/debug/deps/libctrlc-0179dac157c75d8f.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-f55add6a7c0de1d8.rmeta --extern hyper=/opt/rustwide/target/debug/deps/libhyper-f86ef7e3e6ef7ca2.rmeta --extern iron=/opt/rustwide/target/debug/deps/libiron-fe1f65befb2adec4.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-ddfd4a090b905976.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-9b874f1c82153551.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-cec533f4c833732f.rmeta --extern params=/opt/rustwide/target/debug/deps/libparams-002eb516b286a93f.rmeta --extern router=/opt/rustwide/target/debug/deps/librouter-f1ff00762fd25233.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-8232d09c4a3a88c4.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-763f5c2af4aa0fd4.rmeta --cap-lints=warn --crate-version 0.8.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "7540b2d7e0996b5adadfb93e716245022e86f661db2480712ee7a920cdf14849", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7540b2d7e0996b5adadfb93e716245022e86f661db2480712ee7a920cdf14849", kill_on_drop: false }`
[INFO] [stdout] 7540b2d7e0996b5adadfb93e716245022e86f661db2480712ee7a920cdf14849
