[INFO] cloning repository https://github.com/347Online/ump_lang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/347Online/ump_lang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F347Online%2Fump_lang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F347Online%2Fump_lang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 144323a2ed7e286ca8ad1582f28391b328c3520d
[INFO] documenting 347Online/ump_lang against 1.75.0 for beta-1.76-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F347Online%2Fump_lang" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/347Online/ump_lang 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 git repo https://github.com/347Online/ump_lang
[INFO] finished tweaking git repo https://github.com/347Online/ump_lang
[INFO] tweaked toml for git repo https://github.com/347Online/ump_lang written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/347Online/ump_lang 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 70d8d60aad6ddf2eaa2155e62dd5adfa79f186b6fa4af3a7ca56713d629f86d6
[INFO] running `Command { std: "docker" "start" "-a" "70d8d60aad6ddf2eaa2155e62dd5adfa79f186b6fa4af3a7ca56713d629f86d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "70d8d60aad6ddf2eaa2155e62dd5adfa79f186b6fa4af3a7ca56713d629f86d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70d8d60aad6ddf2eaa2155e62dd5adfa79f186b6fa4af3a7ca56713d629f86d6", kill_on_drop: false }`
[INFO] [stdout] 70d8d60aad6ddf2eaa2155e62dd5adfa79f186b6fa4af3a7ca56713d629f86d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] d373b30a3b8d297ae50d8a2df5e3a69d5ed9099e8ffe9b44241c65fecd6c6dbd
[INFO] running `Command { std: "docker" "start" "-a" "d373b30a3b8d297ae50d8a2df5e3a69d5ed9099e8ffe9b44241c65fecd6c6dbd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]    Compiling rustix v0.38.21
[INFO] [stderr]     Checking smallvec v1.11.1
[INFO] [stderr]     Checking linux-raw-sys v0.4.11
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking endian-type v0.1.2
[INFO] [stderr]     Checking unicode-width v0.1.11
[INFO] [stderr]     Checking unicode-segmentation v1.10.1
[INFO] [stderr]     Checking home v0.5.5
[INFO] [stderr]     Checking nibble_vec v0.1.0
[INFO] [stderr]     Checking radix_trie v0.2.1
[INFO] [stderr]     Checking nix v0.26.4
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking uuid v1.5.0
[INFO] [stderr]     Checking fd-lock v3.0.13
[INFO] [stderr]     Checking rustyline v12.0.0
[INFO] [stderr]  Documenting umpteen v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(let_chains, box_patterns)]
[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 `umpteen`
[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 --edition=2021 --crate-type lib --crate-name umpteen src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=2534fb6d5f05a5ae -L dependency=/opt/rustwide/target/debug/deps --extern rustyline=/opt/rustwide/target/debug/deps/librustyline-18bf193164349f48.rmeta --extern uuid=/opt/rustwide/target/debug/deps/libuuid-cc698868c07ce11e.rmeta --cap-lints=warn --crate-version 0.4.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "d373b30a3b8d297ae50d8a2df5e3a69d5ed9099e8ffe9b44241c65fecd6c6dbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d373b30a3b8d297ae50d8a2df5e3a69d5ed9099e8ffe9b44241c65fecd6c6dbd", kill_on_drop: false }`
[INFO] [stdout] d373b30a3b8d297ae50d8a2df5e3a69d5ed9099e8ffe9b44241c65fecd6c6dbd
