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# error kind ExecutionFailed
# pre-build errors command failed: exit status: 101
# rustc version rustc 1.98.0-nightly (cced03bfd 2026-05-28)
# docs.rs version docsrs 0.0.0 (f16e33f3e6ac9fc9e4413728c5dd1b2ba1c6b799 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" "a2d018831bceb46e59fa75d9fc87e63b8d23718a2095e7c58e2b3e19b09c686b" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "rustdoc" "--lib" "-Zrustdoc-map" "--config" "build.rustdocflags=[\"--cfg\", \"docsrs\", \"-Z\", \"unstable-options\", \"--emit=invocation-specific\", \"--resource-suffix\", \"-20260528-1.98.0-nightly-cced03bfd\", \"--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 cmdmat v0.1.4 (/opt/rustwide/workdir) [INFO] [stderr] error[E0277]: the trait bound `D: std::ops::Residual<usize>` is not satisfied [INFO] [stderr] --> lib.rs:267:21 [INFO] [stderr] | [INFO] [stderr] 267 | type Residual = D; [INFO] [stderr] | ^ the nightly-only, unstable trait `std::ops::Residual<usize>` is not implemented for `D` [INFO] [stderr] | [INFO] [stderr] note: required by a bound in `std::ops::Try::Residual` [INFO] [stderr] --> /rustc/cced03bfd61a304243a34504618ecec86c17063f/library/core/src/ops/try_trait.rs:160:4 [INFO] [stderr] help: consider restricting type parameter `D` with unstable trait `Residual` [INFO] [stderr] | [INFO] [stderr] 265 | impl<D: std::ops::Residual<usize>> Try for Decision<D> { [INFO] [stderr] | +++++++++++++++++++++++++++ [INFO] [stderr] [INFO] [stderr] For more information about this error, try `rustc --explain E0277`. [INFO] [stderr] error: could not document `cmdmat` [INFO] running `Command { std: "docker" "inspect" "a2d018831bceb46e59fa75d9fc87e63b8d23718a2095e7c58e2b3e19b09c686b", kill_on_drop: false }`