[INFO] cloning repository https://github.com/andropixels/exercise4
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/andropixels/exercise4" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandropixels%2Fexercise4", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandropixels%2Fexercise4'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 67d6120d8dce715f67599c74c078a5edf7153037
[INFO] documenting andropixels/exercise4 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandropixels%2Fexercise4" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/andropixels/exercise4 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/andropixels/exercise4
[INFO] finished tweaking git repo https://github.com/andropixels/exercise4
[INFO] tweaked toml for git repo https://github.com/andropixels/exercise4 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/andropixels/exercise4 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" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded build-helper v0.1.1
[INFO] [stderr]   Downloaded sp-std v3.0.0
[INFO] [stderr]   Downloaded pin-project-internal v1.0.6
[INFO] [stderr]   Downloaded frame-support-procedural-tools-derive v3.0.0
[INFO] [stderr]   Downloaded httparse v1.3.5
[INFO] [stderr]   Downloaded sp-version v3.0.0
[INFO] [stderr]   Downloaded environmental v1.1.2
[INFO] [stderr]   Downloaded sp-wasm-interface v3.0.0
[INFO] [stderr]   Downloaded pin-project v1.0.6
[INFO] [stderr]   Downloaded pwasm-utils v0.14.0
[INFO] [stderr]   Downloaded wat v1.0.36
[INFO] [stderr]   Downloaded futures-diagnose v1.0.1
[INFO] [stderr]   Downloaded libp2p-plaintext v0.27.1
[INFO] [stderr]   Downloaded sp-staking v3.0.0
[INFO] [stderr]   Downloaded base58 v0.1.0
[INFO] [stderr]   Downloaded frame-system-benchmarking v3.0.0
[INFO] [stderr]   Downloaded libp2p-noise v0.29.0
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.72
[INFO] [stderr]   Downloaded sc-telemetry v3.0.0
[INFO] [stderr]   Downloaded sp-consensus v0.9.0
[INFO] [stderr]   Downloaded asynchronous-codec v0.6.0
[INFO] [stderr]   Downloaded async-process v1.0.2
[INFO] [stderr]   Downloaded sc-client-db v0.9.0
[INFO] [stderr]   Downloaded sc-network v0.9.0
[INFO] [stderr]   Downloaded prost-build v0.7.0
[INFO] [stderr]   Downloaded libp2p-core v0.27.1
[INFO] [stderr]   Downloaded libp2p-yamux v0.30.1
[INFO] [stderr]   Downloaded libp2p-floodsub v0.27.0
[INFO] [stderr]   Downloaded which v3.1.1
[INFO] [stderr]   Downloaded librocksdb-sys v6.11.4
[INFO] [stderr]   Downloaded libz-sys v1.1.2
[INFO] [stderr]   Downloaded pallet-sudo v3.0.0
[INFO] [stderr]   Downloaded pallet-timestamp v3.0.0
[INFO] [stderr]   Downloaded pallet-transaction-payment v3.0.0
[INFO] [stderr]   Downloaded pallet-transaction-payment-rpc-runtime-api v3.0.0
[INFO] [stderr]   Downloaded which v4.0.2
[INFO] [stderr]   Downloaded pallet-transaction-payment-rpc v3.0.0
[INFO] [stderr]   Downloaded owning_ref v0.4.1
[INFO] [stderr]   Downloaded clang-sys v0.29.3
[INFO] [stderr]   Downloaded memmap2 v0.2.1
[INFO] [stderr]   Downloaded parity-db v0.2.3
[INFO] [stderr] error: failed to download replaced source registry `crates-io`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to parse manifest at `/workspace/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/parity-db-0.2.3/Cargo.toml`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to parse the version requirement `0.11	` for dependency `parking_lot`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   expected comma after minor version number, found '\t'
[ERROR] this task or one of its parent failed!
[ERROR] command failed: exit status: 101
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.