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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" "3af33f9fcb6e6eeab87cbddeda9067e94b04b792f8a0c0f39995a34dde958ba8" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "rustdoc" "--lib" "-Zrustdoc-map" "--features" "doc" "--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] Checking backdrop v0.1.11 (/opt/rustwide/workdir) [INFO] [stderr] warning: failed to check lib in package `backdrop` as a prerequisite for scraping examples from: example "comparison" [INFO] [stderr] Try running with `--verbose` to see the error message. [INFO] [stderr] If an example should not be scanned, then consider adding `doc-scrape-examples = false` to its `[[example]]` definition in Cargo.toml [INFO] [stderr] warning: `backdrop` (lib) generated 1 warning [INFO] [stderr] Scraping backdrop v0.1.11 (/opt/rustwide/workdir) [INFO] [stderr] warning: failed to scan example "comparison" in package `backdrop` for example code usage [INFO] [stderr] Try running with `--verbose` to see the error message. [INFO] [stderr] If an example should not be scanned, then consider adding `doc-scrape-examples = false` to its `[[example]]` definition in Cargo.toml [INFO] [stderr] warning: `backdrop` (example "comparison") generated 1 warning [INFO] [stderr] Documenting backdrop v0.1.11 (/opt/rustwide/workdir) [INFO] [stderr] error[E0557]: feature has been removed [INFO] [stderr] --> src/lib.rs:2:38 [INFO] [stderr] | [INFO] [stderr] 2 | #![cfg_attr(feature = "doc", feature(doc_auto_cfg))] [INFO] [stderr] | ^^^^^^^^^^^^ feature has been removed [INFO] [stderr] | [INFO] [stderr] = note: removed in 1.92.0; see <https://github.com/rust-lang/rust/pull/138907> for more information [INFO] [stderr] = note: merged into `doc_cfg` [INFO] [stderr] [INFO] [stderr] error: Compilation failed, aborting rustdoc [INFO] [stderr] [INFO] [stderr] For more information about this error, try `rustc --explain E0557`. [INFO] [stderr] error: could not document `backdrop` [INFO] running `Command { std: "docker" "inspect" "3af33f9fcb6e6eeab87cbddeda9067e94b04b792f8a0c0f39995a34dde958ba8", kill_on_drop: false }`