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# error kind ExecutionFailed
# pre-build errors command failed: exit status: 101
# rustc version rustc 1.98.0-nightly (423e3d252 2026-05-24)
# 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" "c193ca8a5dddcdcd2329b45d827b46dd30a9ebc63273e01cc13cdb6414b0e23f" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "rustdoc" "--lib" "-Zrustdoc-map" "--config" "build.rustdocflags=[\"--cfg\", \"docsrs\", \"-Z\", \"unstable-options\", \"--emit=invocation-specific\", \"--resource-suffix\", \"-20260524-1.98.0-nightly-423e3d252\", \"--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 callback v0.5.4 (/opt/rustwide/workdir) [INFO] [stderr] error[E0107]: struct takes 2 generic arguments but 1 generic argument was supplied [INFO] [stderr] --> src/lib.rs:37:23 [INFO] [stderr] | [INFO] [stderr] 37 | fn get_callbacks() -> MutexGuard<'static, CallbackManager> { [INFO] [stderr] | ^^^^^^^^^^ --------------- supplied 1 generic argument [INFO] [stderr] | | [INFO] [stderr] | expected 2 generic arguments [INFO] [stderr] | [INFO] [stderr] note: struct defined here, with 2 generic parameters: `T`, `R` [INFO] [stderr] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/spin-0.12.0/src/mutex.rs:124:12 [INFO] [stderr] | [INFO] [stderr] 124 | pub struct MutexGuard<'a, T: 'a + ?Sized, R> { [INFO] [stderr] | ^^^^^^^^^^ - - [INFO] [stderr] help: add missing generic argument [INFO] [stderr] | [INFO] [stderr] 37 | fn get_callbacks() -> MutexGuard<'static, CallbackManager, R> { [INFO] [stderr] | +++ [INFO] [stderr] [INFO] [stderr] For more information about this error, try `rustc --explain E0107`. [INFO] [stderr] error: could not document `callback` [INFO] running `Command { std: "docker" "inspect" "c193ca8a5dddcdcd2329b45d827b46dd30a9ebc63273e01cc13cdb6414b0e23f", kill_on_drop: false }`