[INFO] cloning repository https://github.com/r3v2d0g/pr0j3c75
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/r3v2d0g/pr0j3c75" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fr3v2d0g%2Fpr0j3c75", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fr3v2d0g%2Fpr0j3c75'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 716f756c6a9f9c9d16377a94387bbe78fbb8d810
[INFO] documenting r3v2d0g/pr0j3c75 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fr3v2d0g%2Fpr0j3c75" "/workspace/builds/worker-39/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-39/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/r3v2d0g/pr0j3c75 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/r3v2d0g/pr0j3c75
[INFO] finished tweaking git repo https://github.com/r3v2d0g/pr0j3c75
[INFO] tweaked toml for git repo https://github.com/r3v2d0g/pr0j3c75 written to /workspace/builds/worker-39/source/Cargo.toml
[INFO] crate git repo https://github.com/r3v2d0g/pr0j3c75 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3f50622708850d2083e4201aa1f149c7e777713090f987160c55c3aedffd33e5
[INFO] running `Command { std: "docker" "start" "-a" "3f50622708850d2083e4201aa1f149c7e777713090f987160c55c3aedffd33e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3f50622708850d2083e4201aa1f149c7e777713090f987160c55c3aedffd33e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f50622708850d2083e4201aa1f149c7e777713090f987160c55c3aedffd33e5", kill_on_drop: false }`
[INFO] [stdout] 3f50622708850d2083e4201aa1f149c7e777713090f987160c55c3aedffd33e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9dee8203bda31158388a2533d4acd0b14fece9f1adc537b3192ece630f9a70de
[INFO] running `Command { std: "docker" "start" "-a" "9dee8203bda31158388a2533d4acd0b14fece9f1adc537b3192ece630f9a70de", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling syn v1.0.55
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking humantime v2.0.1
[INFO] [stderr]     Checking pico-args v0.3.4
[INFO] [stderr]    Compiling fuser v0.6.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking users v0.11.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking env_logger v0.8.2
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]  Documenting pr0j3c75 v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/main.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![feature(option_expect_none)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `option_expect_none`
[INFO] [stdout]   --> src/main.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![feature(option_expect_none)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `pr0j3c75`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name pr0j3c75 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=7e9f814f61ff1b88 -L dependency=/opt/rustwide/target/debug/deps --extern either=/opt/rustwide/target/debug/deps/libeither-ad1849c1089dcfe8.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-97b7322c1bdadf6d.rmeta --extern fuser=/opt/rustwide/target/debug/deps/libfuser-ee589bc225df9f59.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-bc3c634b3928250b.rmeta --extern pico_args=/opt/rustwide/target/debug/deps/libpico_args-c46fc1ed96ff30fa.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-56add537c7d905c8.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-59e990173e300f16.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-39ca80786e15d054.rmeta --cap-lints=warn --crate-version 0.0.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "9dee8203bda31158388a2533d4acd0b14fece9f1adc537b3192ece630f9a70de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9dee8203bda31158388a2533d4acd0b14fece9f1adc537b3192ece630f9a70de", kill_on_drop: false }`
[INFO] [stdout] 9dee8203bda31158388a2533d4acd0b14fece9f1adc537b3192ece630f9a70de