[INFO] fetching crate ffgen 0.3.5...
[INFO] documenting ffgen-0.3.5 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate ffgen 0.3.5 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate ffgen 0.3.5 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 ffgen 0.3.5
[INFO] finished tweaking crates.io crate ffgen 0.3.5
[INFO] tweaked toml for crates.io crate ffgen 0.3.5 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate ffgen 0.3.5 already has a lockfile, it will not be regenerated
[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 syn v1.0.84
[INFO] [stderr]   Downloaded digest v0.10.1
[INFO] [stderr]   Downloaded fake v2.4.3
[INFO] [stderr]   Downloaded os_str_bytes v6.0.0
[INFO] [stderr]   Downloaded clap v3.0.1
[INFO] [stderr]   Downloaded clap_derive v3.0.0
[INFO] [stderr]   Downloaded block-buffer v0.10.0
[INFO] [stderr]   Downloaded crypto-common v0.1.1
[INFO] [stderr]   Downloaded md-5 v0.10.0
[INFO] [stderr]   Downloaded anyhow v1.0.52
[INFO] [stderr]   Downloaded erased-serde v0.3.17
[INFO] [stderr]   Downloaded clap_complete v3.0.1
[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] bfd483b56defd89f2c4beecdd14a0a79df1586a9870e168d2e067d3fd6950950
[INFO] running `Command { std: "docker" "start" "-a" "bfd483b56defd89f2c4beecdd14a0a79df1586a9870e168d2e067d3fd6950950", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bfd483b56defd89f2c4beecdd14a0a79df1586a9870e168d2e067d3fd6950950", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfd483b56defd89f2c4beecdd14a0a79df1586a9870e168d2e067d3fd6950950", kill_on_drop: false }`
[INFO] [stdout] bfd483b56defd89f2c4beecdd14a0a79df1586a9870e168d2e067d3fd6950950
[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] 19dd7533d9e26395e3ca9771402d856c1826d0d13da42c82787d6470bc118127
[INFO] running `Command { std: "docker" "start" "-a" "19dd7533d9e26395e3ca9771402d856c1826d0d13da42c82787d6470bc118127", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling syn v1.0.84
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling serde_derive v1.0.133
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling serde v1.0.133
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling rustversion v1.0.6
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling anyhow v1.0.52
[INFO] [stderr]    Compiling quote v1.0.14
[INFO] [stderr]    Compiling terminal_size v0.1.17
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling textwrap v0.14.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling os_str_bytes v6.0.0
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking ryu v1.0.9
[INFO] [stderr]     Checking block-buffer v0.10.0
[INFO] [stderr]     Checking crypto-common v0.1.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]    Compiling serde_json v1.0.74
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stderr]     Checking sha1 v0.6.0
[INFO] [stderr]    Compiling erased-serde v0.3.17
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking digest v0.10.1
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking itoa v1.0.1
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking md-5 v0.10.0
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap_derive v3.0.0
[INFO] [stderr]    Compiling strum_macros v0.23.1
[INFO] [stderr]    Compiling strum v0.23.0
[INFO] [stderr]    Compiling clap v3.0.1
[INFO] [stderr]     Checking clap_complete v3.0.1
[INFO] [stderr]    Compiling ffgen v0.3.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking serde_yaml v0.8.23
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking fake v2.4.3
[INFO] [stderr]  Documenting ffgen v0.3.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(trait_alias)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `ffgen`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type bin --crate-name ffgen src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=087311ead337d358 -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-ffa5ccab3c76db03.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-a941eed8b21d0539.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-73bab25fde701d2d.rmeta --extern clap_complete=/opt/rustwide/target/debug/deps/libclap_complete-83f0858ef897cf6d.rmeta --extern csv=/opt/rustwide/target/debug/deps/libcsv-326f5227f464eeaf.rmeta --extern erased_serde=/opt/rustwide/target/debug/deps/liberased_serde-9e356d5792354eb2.rmeta --extern fake=/opt/rustwide/target/debug/deps/libfake-509e6162a8169060.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-9c7d51f549cf58b7.rmeta --extern md5=/opt/rustwide/target/debug/deps/libmd5-3827842015c69d43.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-0e113db55cc5a08a.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-e9a2b6c79b245577.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-6ac57216be1a35d0.rmeta --extern serde_yaml=/opt/rustwide/target/debug/deps/libserde_yaml-5d35594543772e3c.rmeta --extern strum=/opt/rustwide/target/debug/deps/libstrum-e7e290e0997297d8.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-27f92d7ce7d420ee.rmeta --cap-lints=warn --crate-version 0.3.5` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "19dd7533d9e26395e3ca9771402d856c1826d0d13da42c82787d6470bc118127", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19dd7533d9e26395e3ca9771402d856c1826d0d13da42c82787d6470bc118127", kill_on_drop: false }`
[INFO] [stdout] 19dd7533d9e26395e3ca9771402d856c1826d0d13da42c82787d6470bc118127
