[INFO] cloning repository https://github.com/andrewchen0028/rusty-bitcoin
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/andrewchen0028/rusty-bitcoin" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandrewchen0028%2Frusty-bitcoin", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandrewchen0028%2Frusty-bitcoin'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 593757e03cbe06767106ea7e34dfd6e35b82cdcc
[INFO] documenting andrewchen0028/rusty-bitcoin against 1.75.0 for beta-1.76-rustdoc-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandrewchen0028%2Frusty-bitcoin" "/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/andrewchen0028/rusty-bitcoin 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] removed /workspace/builds/worker-4-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/andrewchen0028/rusty-bitcoin
[INFO] finished tweaking git repo https://github.com/andrewchen0028/rusty-bitcoin
[INFO] tweaked toml for git repo https://github.com/andrewchen0028/rusty-bitcoin written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/andrewchen0028/rusty-bitcoin 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 }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] eb82bf5f55c52a8ccb7ce8f539c042dc591e7d24e3c314899a4398f89f4746b8
[INFO] running `Command { std: "docker" "start" "-a" "eb82bf5f55c52a8ccb7ce8f539c042dc591e7d24e3c314899a4398f89f4746b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb82bf5f55c52a8ccb7ce8f539c042dc591e7d24e3c314899a4398f89f4746b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb82bf5f55c52a8ccb7ce8f539c042dc591e7d24e3c314899a4398f89f4746b8", kill_on_drop: false }`
[INFO] [stdout] eb82bf5f55c52a8ccb7ce8f539c042dc591e7d24e3c314899a4398f89f4746b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 7d30a03c03e0a04a68fdc313c6b4d58c59e4510365f924ba3a905ca2aff0eed8
[INFO] running `Command { std: "docker" "start" "-a" "7d30a03c03e0a04a68fdc313c6b4d58c59e4510365f924ba3a905ca2aff0eed8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.121
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.89
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking cache-padded v1.2.0
[INFO] [stderr]    Compiling log v0.4.16
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking pin-project-lite v0.2.8
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking futures-io v0.3.21
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.8
[INFO] [stderr]     Checking fastrand v1.7.0
[INFO] [stderr]     Checking event-listener v2.5.2
[INFO] [stderr]     Checking once_cell v1.10.0
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]     Checking async-task v4.2.0
[INFO] [stderr]     Checking slab v0.4.6
[INFO] [stderr]     Checking async-channel v1.6.1
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]    Compiling serde v1.0.136
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[INFO] [stderr]     Checking ppv-lite86 v0.2.16
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[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking ethnum v1.1.1
[INFO] [stderr]     Checking bs58 v0.4.0
[INFO] [stderr]    Compiling quote v1.0.16
[INFO] [stderr]     Checking getrandom v0.2.6
[INFO] [stderr]     Checking socket2 v0.4.4
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking async-executor v1.4.1
[INFO] [stderr]     Checking blocking v1.2.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking rust-crypto v0.2.36
[INFO] [stderr]    Compiling ctor v0.1.22
[INFO] [stderr]     Checking polling v2.2.0
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking async-io v1.6.0
[INFO] [stderr]     Checking async-global-executor v2.0.4
[INFO] [stderr]     Checking async-std v1.11.0
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]  Documenting rbtc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking rbtc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `txn_count` is never read
[INFO] [stdout]   --> src/util/types/block.rs:13:3
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Block {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 12 |   header: Header,
[INFO] [stdout] 13 |   txn_count: u32,
[INFO] [stdout]    |   ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Block` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.84s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] [stderr]    Generated /opt/rustwide/target/doc/rbtc/index.html
[INFO] [stderr]    Generated /opt/rustwide/target/doc/main/index.html
[INFO] running `Command { std: "docker" "inspect" "7d30a03c03e0a04a68fdc313c6b4d58c59e4510365f924ba3a905ca2aff0eed8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d30a03c03e0a04a68fdc313c6b4d58c59e4510365f924ba3a905ca2aff0eed8", kill_on_drop: false }`
[INFO] [stdout] 7d30a03c03e0a04a68fdc313c6b4d58c59e4510365f924ba3a905ca2aff0eed8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "DOCS_RS=1" "-e" "RUSTC_BOOTSTRAP=1" "-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" "rustdoc" "--lib" "-Zrustdoc-map" "-Z" "unstable-options" "--config" "build.rustdocflags=[\"-Z\", \"unstable-options\", \"--document-private-items\"]" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bb429049964f35da677d9f4c01490a68f2b571fa7ae0f067c7ccc3a85fdad4bb
[INFO] running `Command { std: "docker" "start" "-a" "bb429049964f35da677d9f4c01490a68f2b571fa7ae0f067c7ccc3a85fdad4bb", kill_on_drop: false }`
[INFO] [stderr]  Documenting rbtc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.06s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] [stderr]    Generated /opt/rustwide/target/doc/rbtc/index.html
[INFO] running `Command { std: "docker" "inspect" "bb429049964f35da677d9f4c01490a68f2b571fa7ae0f067c7ccc3a85fdad4bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb429049964f35da677d9f4c01490a68f2b571fa7ae0f067c7ccc3a85fdad4bb", kill_on_drop: false }`
[INFO] [stdout] bb429049964f35da677d9f4c01490a68f2b571fa7ae0f067c7ccc3a85fdad4bb