[INFO] cloning repository https://github.com/Bitbot25/mosaic
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Bitbot25/mosaic" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBitbot25%2Fmosaic", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBitbot25%2Fmosaic'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 525126910d781987f3036b772a242bd58bb5fbce
[INFO] documenting Bitbot25/mosaic against 1.91.0 for beta-1.92-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBitbot25%2Fmosaic" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Bitbot25/mosaic
[INFO] finished tweaking git repo https://github.com/Bitbot25/mosaic
[INFO] tweaked toml for git repo https://github.com/Bitbot25/mosaic written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Bitbot25/mosaic on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Bitbot25/mosaic 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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cranelift-native v0.97.1
[INFO] [stderr]   Downloaded thiserror v1.0.43
[INFO] [stderr]   Downloaded cranelift-entity v0.97.1
[INFO] [stderr]   Downloaded cranelift v0.97.1
[INFO] [stderr]   Downloaded cranelift-codegen-shared v0.97.1
[INFO] [stderr]   Downloaded wasmtime-jit-icache-coherence v10.0.1
[INFO] [stderr]   Downloaded cranelift-control v0.97.1
[INFO] [stderr]   Downloaded thiserror-impl v1.0.43
[INFO] [stderr]   Downloaded ariadne v0.3.0
[INFO] [stderr]   Downloaded cranelift-frontend v0.97.1
[INFO] [stderr]   Downloaded cranelift-module v0.97.1
[INFO] [stderr]   Downloaded arbitrary v1.3.0
[INFO] [stderr]   Downloaded cranelift-isle v0.97.1
[INFO] [stderr]   Downloaded regalloc2 v0.9.1
[INFO] [stderr]   Downloaded cranelift-jit v0.97.1
[INFO] [stderr]   Downloaded cranelift-bforest v0.97.1
[INFO] [stderr]   Downloaded target-lexicon v0.12.8
[INFO] [stderr]   Downloaded cranelift-codegen-meta v0.97.1
[INFO] [stderr]   Downloaded cranelift-codegen v0.97.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 97af283b206693989c53266edfc293a6f4aa51490fc5eea926a6f73372501c9d
[INFO] running `Command { std: "docker" "start" "-a" "97af283b206693989c53266edfc293a6f4aa51490fc5eea926a6f73372501c9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "97af283b206693989c53266edfc293a6f4aa51490fc5eea926a6f73372501c9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97af283b206693989c53266edfc293a6f4aa51490fc5eea926a6f73372501c9d", kill_on_drop: false }`
[INFO] [stdout] 97af283b206693989c53266edfc293a6f4aa51490fc5eea926a6f73372501c9d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b9ef03a2adf140e145bc0a68c90e29df12ad79abe8efe5d7a9c0265b0d7ecb9
[INFO] running `Command { std: "docker" "start" "-a" "2b9ef03a2adf140e145bc0a68c90e29df12ad79abe8efe5d7a9c0265b0d7ecb9", kill_on_drop: false }`
[INFO] [stderr]    Compiling ahash v0.8.3
[INFO] [stderr]    Compiling cranelift-isle v0.97.1
[INFO] [stderr]    Compiling cranelift-codegen-shared v0.97.1
[INFO] [stderr]     Checking once_cell v1.18.0
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]    Compiling target-lexicon v0.12.8
[INFO] [stderr]     Checking smallvec v1.11.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking arbitrary v1.3.0
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]     Checking cranelift-entity v0.97.1
[INFO] [stderr]     Checking slice-group-by v0.3.1
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.63
[INFO] [stderr]    Compiling cranelift-codegen-meta v0.97.1
[INFO] [stderr]     Checking bumpalo v3.13.0
[INFO] [stderr]    Compiling quote v1.0.29
[INFO] [stderr]    Compiling unicode-ident v1.0.10
[INFO] [stderr]    Compiling anyhow v1.0.71
[INFO] [stderr]    Compiling thiserror v1.0.43
[INFO] [stderr]     Checking region v2.2.0
[INFO] [stderr]     Checking cranelift-bforest v0.97.1
[INFO] [stderr]     Checking wasmtime-jit-icache-coherence v10.0.1
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]     Checking yansi v0.5.1
[INFO] [stderr]     Checking unicode-xid v0.2.4
[INFO] [stderr]     Checking hashbrown v0.13.2
[INFO] [stderr]     Checking ariadne v0.3.0
[INFO] [stderr]     Checking cranelift-control v0.97.1
[INFO] [stderr]    Compiling syn v2.0.23
[INFO] [stderr]     Checking gimli v0.27.3
[INFO] [stderr]     Checking regalloc2 v0.9.1
[INFO] [stderr]    Compiling cranelift-codegen v0.97.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.43
[INFO] [stderr]     Checking cranelift-frontend v0.97.1
[INFO] [stderr]     Checking cranelift-module v0.97.1
[INFO] [stderr]     Checking cranelift-native v0.97.1
[INFO] [stderr]     Checking cranelift-jit v0.97.1
[INFO] [stderr]     Checking cranelift v0.97.1
[INFO] [stderr]  Documenting mosaic v0.1.0 (/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(str_internals, char_indices_offset)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `str_internals` is internal to the compiler or standard library
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(str_internals, char_indices_offset)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: using it is strongly discouraged
[INFO] [stdout]   = note: `#[warn(internal_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `mosaic`
[INFO] running `Command { std: "docker" "inspect" "2b9ef03a2adf140e145bc0a68c90e29df12ad79abe8efe5d7a9c0265b0d7ecb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b9ef03a2adf140e145bc0a68c90e29df12ad79abe8efe5d7a9c0265b0d7ecb9", kill_on_drop: false }`
[INFO] [stdout] 2b9ef03a2adf140e145bc0a68c90e29df12ad79abe8efe5d7a9c0265b0d7ecb9
