[INFO] crate mdbookshelf 0.1.1 is already in cache
[INFO] checking mdbookshelf-0.1.1 against master#c9edc02e8320a9e5799d185910ece7d491f524e6 for pr-64398
[INFO] extracting crate mdbookshelf 0.1.1 into work/builds/worker-4/source
[INFO] validating manifest of crates.io crate mdbookshelf 0.1.1 on toolchain c9edc02e8320a9e5799d185910ece7d491f524e6-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate mdbookshelf 0.1.1
[INFO] finished tweaking crates.io crate mdbookshelf 0.1.1
[INFO] tweaked toml for crates.io crate mdbookshelf 0.1.1 written to work/builds/worker-4/source/Cargo.toml
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c58a918d290bd21ea7dd46d428c4d02098e8e987652242a79989234a97b9fd5d
[INFO] running `"docker" "start" "-a" "c58a918d290bd21ea7dd46d428c4d02098e8e987652242a79989234a97b9fd5d"`
[INFO] [stderr]    Compiling same-file v0.1.3
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]    Compiling crossbeam v0.2.12
[INFO] [stderr]    Compiling home v0.3.4
[INFO] [stderr]    Compiling shell-escape v0.1.4
[INFO] [stderr]    Compiling crossbeam v0.3.2
[INFO] [stderr]    Compiling hex v0.2.0
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]    Compiling walkdir v1.0.7
[INFO] [stderr]    Compiling socket2 v0.3.11
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling filetime v0.1.15
[INFO] [stderr]    Compiling openssl-sys v0.9.49
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling tar v0.4.26
[INFO] [stderr]    Compiling curl v0.4.23
[INFO] [stderr]    Compiling flate2 v0.2.20
[INFO] [stderr]     Checking uuid v0.5.1
[INFO] [stderr]     Checking structopt v0.1.7
[INFO] [stderr]    Compiling error-chain v0.11.0
[INFO] [stderr]    Compiling openssl v0.10.24
[INFO] [stderr]     Checking zip v0.2.8
[INFO] [stderr]    Compiling globset v0.2.1
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]    Compiling html5ever v0.22.5
[INFO] [stderr]    Compiling strum_macros v0.15.0
[INFO] [stderr]    Compiling curl-sys v0.4.21
[INFO] [stderr]    Compiling libssh2-sys v0.2.12
[INFO] [stderr]     Checking ws v0.7.9
[INFO] [stderr]    Compiling string_cache_codegen v0.4.4
[INFO] [stderr]     Checking epub-builder v0.3.0
[INFO] [stderr]    Compiling serde_ignored v0.0.4
[INFO] [stderr] error[E0283]: type annotations required: cannot resolve `std::string::String: std::convert::AsRef<_>`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/epub-builder-0.3.0/src/epub.rs:207:74
[INFO] [stderr]     |
[INFO] [stderr] 207 |         self.toc.add(TocElement::new("toc.xhtml", self.metadata.toc_name.as_ref()));
[INFO] [stderr]     |                                                                          ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0283`.
[INFO] [stderr] error: Could not compile `epub-builder`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "c58a918d290bd21ea7dd46d428c4d02098e8e987652242a79989234a97b9fd5d"`
[INFO] running `"docker" "rm" "-f" "c58a918d290bd21ea7dd46d428c4d02098e8e987652242a79989234a97b9fd5d"`
[INFO] [stdout] c58a918d290bd21ea7dd46d428c4d02098e8e987652242a79989234a97b9fd5d