[INFO] cloning repository https://github.com/achow101/wallet-fingerprinting
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/achow101/wallet-fingerprinting" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fachow101%2Fwallet-fingerprinting", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fachow101%2Fwallet-fingerprinting'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] acb538de5bdab64ca8254f49a077a905d32a1267
[INFO] documenting achow101/wallet-fingerprinting 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%2Fachow101%2Fwallet-fingerprinting" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/achow101/wallet-fingerprinting 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/achow101/wallet-fingerprinting
[INFO] finished tweaking git repo https://github.com/achow101/wallet-fingerprinting
[INFO] tweaked toml for git repo https://github.com/achow101/wallet-fingerprinting written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/achow101/wallet-fingerprinting 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] [stderr]     Updating crates.io index
[INFO] [stderr]     Updating git repository `https://github.com/0xB10C/rawtx-rs.git`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bitcoincore-rpc-json v0.14.0
[INFO] [stderr]   Downloaded factorial v0.2.1
[INFO] [stderr]   Downloaded bitcoincore-rpc v0.14.0
[INFO] [stderr]   Downloaded bitcoin v0.27.1
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 67ed7a2caaa54efe6df0665462e0845589bb678284a71bccf1798f854e3028e6
[INFO] running `Command { std: "docker" "start" "-a" "67ed7a2caaa54efe6df0665462e0845589bb678284a71bccf1798f854e3028e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "67ed7a2caaa54efe6df0665462e0845589bb678284a71bccf1798f854e3028e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67ed7a2caaa54efe6df0665462e0845589bb678284a71bccf1798f854e3028e6", kill_on_drop: false }`
[INFO] [stdout] 67ed7a2caaa54efe6df0665462e0845589bb678284a71bccf1798f854e3028e6
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/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] ce7f945ace9cc422d21dcf31b4036a4d00a8a290b5976d19e3db0e652ca98d17
[INFO] running `Command { std: "docker" "start" "-a" "ce7f945ace9cc422d21dcf31b4036a4d00a8a290b5976d19e3db0e652ca98d17", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.96
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]     Checking itoa v1.0.2
[INFO] [stderr]     Checking bech32 v0.8.1
[INFO] [stderr]     Checking ryu v1.0.10
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking base64-compat v1.0.0
[INFO] [stderr]    Compiling secp256k1-sys v0.4.2
[INFO] [stderr]    Compiling secp256k1-sys v0.3.0
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking factorial v0.2.1
[INFO] [stderr]     Checking secp256k1 v0.19.0
[INFO] [stderr]     Checking bitcoin_hashes v0.10.0
[INFO] [stderr]     Checking secp256k1 v0.20.3
[INFO] [stderr]     Checking jsonrpc v0.12.1
[INFO] [stderr]     Checking bitcoin v0.27.1
[INFO] [stderr]     Checking bitcoincore-rpc-json v0.14.0
[INFO] [stderr]     Checking rawtx-rs v0.1.0 (https://github.com/0xB10C/rawtx-rs.git?rev=36eb9683ab71feb80a85d6043c05dce6df10838d#36eb9683)
[INFO] [stderr]     Checking bitcoincore-rpc v0.14.0
[INFO] [stderr]  Documenting wallet_fingerprinting 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:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(map_first_last)]
[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 `wallet_fingerprinting`
[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 bin --crate-name wallet_fingerprinting 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=4a3d6f5c16d6437d -L dependency=/opt/rustwide/target/debug/deps --extern bitcoin=/opt/rustwide/target/debug/deps/libbitcoin-aee81079a7c9bc62.rmeta --extern bitcoincore_rpc=/opt/rustwide/target/debug/deps/libbitcoincore_rpc-9d34fc4dd147fce3.rmeta --extern factorial=/opt/rustwide/target/debug/deps/libfactorial-553da081d229bb26.rmeta --extern rawtx_rs=/opt/rustwide/target/debug/deps/librawtx_rs-f565605f8c162552.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "ce7f945ace9cc422d21dcf31b4036a4d00a8a290b5976d19e3db0e652ca98d17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce7f945ace9cc422d21dcf31b4036a4d00a8a290b5976d19e3db0e652ca98d17", kill_on_drop: false }`
[INFO] [stdout] ce7f945ace9cc422d21dcf31b4036a4d00a8a290b5976d19e3db0e652ca98d17
