[INFO] cloning repository https://github.com/tatref/synacor-challenge
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tatref/synacor-challenge" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftatref%2Fsynacor-challenge", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftatref%2Fsynacor-challenge'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 769e66a94403e64fb9b23491240c650fd8776d2c
[INFO] documenting tatref/synacor-challenge against beta-2025-10-28 for beta-1.92-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftatref%2Fsynacor-challenge" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-0-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/tatref/synacor-challenge
[INFO] finished tweaking git repo https://github.com/tatref/synacor-challenge
[INFO] tweaked toml for git repo https://github.com/tatref/synacor-challenge written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tatref/synacor-challenge on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/tatref/synacor-challenge 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" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_with_macros v3.14.1
[INFO] [stderr]   Downloaded fd-lock v4.0.4
[INFO] [stderr]   Downloaded csscolorparser v0.7.2
[INFO] [stderr]   Downloaded colorgrad v0.7.2
[INFO] [stderr]   Downloaded rustyline v17.0.1
[INFO] [stderr]   Downloaded serde_with v3.14.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4d443b1e3862c868adcc5e55ce6feacfe045b635ab7ec3ad0d8a258eeb24a6db
[INFO] running `Command { std: "docker" "start" "-a" "4d443b1e3862c868adcc5e55ce6feacfe045b635ab7ec3ad0d8a258eeb24a6db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4d443b1e3862c868adcc5e55ce6feacfe045b635ab7ec3ad0d8a258eeb24a6db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d443b1e3862c868adcc5e55ce6feacfe045b635ab7ec3ad0d8a258eeb24a6db", kill_on_drop: false }`
[INFO] [stdout] 4d443b1e3862c868adcc5e55ce6feacfe045b635ab7ec3ad0d8a258eeb24a6db
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] abebdc0bf86b8d38ae9775636600222d3c0ff78ddcd8ed2b6bf8fc646673e8fc
[INFO] running `Command { std: "docker" "start" "-a" "abebdc0bf86b8d38ae9775636600222d3c0ff78ddcd8ed2b6bf8fc646673e8fc", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.175
[INFO] [stderr]    Compiling serde_core v1.0.226
[INFO] [stderr]    Compiling nix v0.30.1
[INFO] [stderr]    Compiling serde v1.0.226
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking nibble_vec v0.1.0
[INFO] [stderr]     Checking endian-type v0.1.2
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]     Checking fd-lock v4.0.4
[INFO] [stderr]     Checking csscolorparser v0.7.2
[INFO] [stderr]     Checking unicode-width v0.2.1
[INFO] [stderr]     Checking clap v4.5.48
[INFO] [stderr]     Checking radix_trie v0.2.1
[INFO] [stderr]     Checking colorgrad v0.7.2
[INFO] [stderr]     Checking regex-automata v0.4.10
[INFO] [stderr]     Checking serde_json v1.0.145
[INFO] [stderr]     Checking getrandom v0.3.3
[INFO] [stderr]     Checking rand_core v0.9.3
[INFO] [stderr]     Checking rand_chacha v0.9.0
[INFO] [stderr]     Checking rand v0.9.2
[INFO] [stderr]     Checking regex v1.11.2
[INFO] [stderr]    Compiling darling_core v0.21.3
[INFO] [stderr]    Compiling serde_derive v1.0.226
[INFO] [stderr]     Checking rustyline v17.0.1
[INFO] [stderr]    Compiling darling_macro v0.21.3
[INFO] [stderr]    Compiling darling v0.21.3
[INFO] [stderr]    Compiling serde_with_macros v3.14.1
[INFO] [stderr]     Checking serde_with v3.14.1
[INFO] [stderr]  Documenting synacor-challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking synacor-challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: enum `Node` is never used
[INFO] [stdout]    --> src/solver.rs:455:6
[INFO] [stdout]     |
[INFO] [stdout] 455 | enum Node {
[INFO] [stdout]     |      ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Operation` is never used
[INFO] [stdout]    --> src/solver.rs:468:6
[INFO] [stdout]     |
[INFO] [stdout] 468 | enum Operation {
[INFO] [stdout]     |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `x`
[INFO] [stdout]    --> src/assembly.rs:437:47
[INFO] [stdout]     |
[INFO] [stdout] 437 |     /// Call(Reg(x)) => Call(Num(value at reg[x]))
[INFO] [stdout]     |                                               ^ no item named `x` in scope
[INFO] [stdout]     |
[INFO] [stdout]     = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout]     = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 21.22s
[INFO] [stderr]    Generated /opt/rustwide/target/doc/synacor_challenge/index.html and 1 other file
[INFO] running `Command { std: "docker" "inspect" "abebdc0bf86b8d38ae9775636600222d3c0ff78ddcd8ed2b6bf8fc646673e8fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abebdc0bf86b8d38ae9775636600222d3c0ff78ddcd8ed2b6bf8fc646673e8fc", kill_on_drop: false }`
[INFO] [stdout] abebdc0bf86b8d38ae9775636600222d3c0ff78ddcd8ed2b6bf8fc646673e8fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "rustdoc" "--lib" "-Zrustdoc-map" "--config" "build.rustdocflags=[\"--cfg\", \"docsrs\", \"-Z\", \"unstable-options\", \"--document-private-items\"]" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac3c844e9785c015f652fc515b98797fa6d0f0a4e4883be128f887341c075c33
[INFO] running `Command { std: "docker" "start" "-a" "ac3c844e9785c015f652fc515b98797fa6d0f0a4e4883be128f887341c075c33", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling darling_core v0.21.3
[INFO] [stderr]    Compiling serde_derive v1.0.226
[INFO] [stderr]    Compiling darling_macro v0.21.3
[INFO] [stderr]    Compiling darling v0.21.3
[INFO] [stderr]    Compiling serde_with_macros v3.14.1
[INFO] [stderr]     Checking serde v1.0.226
[INFO] [stderr]     Checking serde_with v3.14.1
[INFO] [stderr]  Documenting synacor-challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unresolved link to `x`
[INFO] [stdout]    --> src/assembly.rs:437:47
[INFO] [stdout]     |
[INFO] [stdout] 437 |     /// Call(Reg(x)) => Call(Num(value at reg[x]))
[INFO] [stdout]     |                                               ^ no item named `x` in scope
[INFO] [stdout]     |
[INFO] [stdout]     = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout]     = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.30s
[INFO] [stderr]    Generated /opt/rustwide/target/doc/synacor_challenge/index.html
[INFO] running `Command { std: "docker" "inspect" "ac3c844e9785c015f652fc515b98797fa6d0f0a4e4883be128f887341c075c33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac3c844e9785c015f652fc515b98797fa6d0f0a4e4883be128f887341c075c33", kill_on_drop: false }`
[INFO] [stdout] ac3c844e9785c015f652fc515b98797fa6d0f0a4e4883be128f887341c075c33