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# error kind ExecutionFailed
# pre-build errors command failed: exit status: 101
# rustc version rustc 1.98.0-nightly (54333ff07 2026-05-22)
# docs.rs version docsrs 0.0.0 (dfb3f9ff56454bf392095ffb91bc746f8e9d1471 2026-05-23 )
# build log [INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "DOCS_RS=1" "-w" "/opt/rustwide/workdir" "--user" "1001:1001" "65e70916782cc00326636bcca741c6677523c061feacb9ecb3c00c082c229da1" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "rustdoc" "--lib" "-Zrustdoc-map" "--config" "build.rustdocflags=[\"--cfg\", \"docsrs\", \"-Z\", \"unstable-options\", \"--emit=invocation-specific\", \"--resource-suffix\", \"-20260522-1.98.0-nightly-54333ff07\", \"--static-root-path\", \"/-/rustdoc.static/\", \"--cap-lints\", \"warn\", \"--extern-html-root-takes-precedence\"]" "--offline" "-Zunstable-options" "--config=doc.extern-map.registries.crates-io=\"https://docs.rs/{pkg_name}/{version}/x86_64-unknown-linux-gnu\"" "-Zrustdoc-scrape-examples" "-j6" "--target" "x86_64-unknown-linux-gnu", kill_on_drop: false }` [INFO] [stderr] warning: target filter specified, but no targets matched; this is a no-op [INFO] [stderr] Documenting ex3-node-types v0.15.166 (/opt/rustwide/workdir) [INFO] [stderr] error[E0053]: method `steps_between` has an incompatible type for trait [INFO] [stderr] --> src/number/mod.rs:162:51 [INFO] [stderr] | [INFO] [stderr] 162 | fn steps_between(start: &Self, end: &Self) -> Option<usize> { [INFO] [stderr] | ^^^^^^^^^^^^^ expected `(usize, std::option::Option<usize>)`, found `std::option::Option<usize>` [INFO] [stderr] | [INFO] [stderr] = note: expected signature `fn(&number::Ex3Uint, &number::Ex3Uint) -> (usize, std::option::Option<usize>)` [INFO] [stderr] found signature `fn(&number::Ex3Uint, &number::Ex3Uint) -> std::option::Option<usize>` [INFO] [stderr] help: change the output type to match the trait [INFO] [stderr] | [INFO] [stderr] 162 - fn steps_between(start: &Self, end: &Self) -> Option<usize> { [INFO] [stderr] 162 + fn steps_between(start: &Self, end: &Self) -> (usize, std::option::Option<usize>) { [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] For more information about this error, try `rustc --explain E0053`. [INFO] [stderr] error: could not document `ex3-node-types` [INFO] running `Command { std: "docker" "inspect" "65e70916782cc00326636bcca741c6677523c061feacb9ecb3c00c082c229da1", kill_on_drop: false }`