[INFO] crate mdbookshelf 0.1.1 is already in cache
[INFO] testing mdbookshelf-0.1.1 against beta-2019-09-28 for beta-1.39-1
[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 beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "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 `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/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=warn" "-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" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] ea50489d46e0d49b86c3835c13e78717e95f7d4c43c1ac9b6ff38d8e938610c1
[INFO] running `"docker" "start" "-a" "ea50489d46e0d49b86c3835c13e78717e95f7d4c43c1ac9b6ff38d8e938610c1"`
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling string_cache_shared v0.3.0
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.3
[INFO] [stderr]    Compiling curl v0.4.25
[INFO] [stderr]    Compiling mac v0.1.1
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling same-file v0.1.3
[INFO] [stderr]    Compiling typeable v0.1.2
[INFO] [stderr]    Compiling utf-8 v0.7.5
[INFO] [stderr]    Compiling same-file v1.0.5
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]    Compiling modifier v0.1.0
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling strsim v0.6.0
[INFO] [stderr]    Compiling crossbeam v0.2.12
[INFO] [stderr]    Compiling glob v0.2.11
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]    Compiling home v0.3.4
[INFO] [stderr]    Compiling unic-common v0.7.0
[INFO] [stderr]    Compiling scoped-tls v0.1.2
[INFO] [stderr]    Compiling crossbeam v0.3.2
[INFO] [stderr]    Compiling shell-escape v0.1.4
[INFO] [stderr]    Compiling termcolor v0.3.6
[INFO] [stderr]    Compiling hex v0.2.0
[INFO] [stderr]    Compiling sequence_trie v0.3.6
[INFO] [stderr]    Compiling unic-char-range v0.7.0
[INFO] [stderr]    Compiling podio v0.1.6
[INFO] [stderr]    Compiling strum v0.15.0
[INFO] [stderr]    Compiling is-match v0.1.0
[INFO] [stderr]    Compiling deunicode v0.4.3
[INFO] [stderr]    Compiling shlex v0.1.1
[INFO] [stderr]    Compiling humansize v1.1.0
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]    Compiling curl-sys v0.4.23
[INFO] [stderr]    Compiling libssh2-sys v0.2.12
[INFO] [stderr]    Compiling cmake v0.1.42
[INFO] [stderr]    Compiling bzip2-sys v0.1.7
[INFO] [stderr]    Compiling futf v0.1.4
[INFO] [stderr]    Compiling walkdir v1.0.7
[INFO] [stderr]    Compiling walkdir v2.2.9
[INFO] [stderr]    Compiling unic-ucd-version v0.7.0
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling unic-char-property v0.7.0
[INFO] [stderr]    Compiling slug v0.1.4
[INFO] [stderr]    Compiling tendril v0.4.1
[INFO] [stderr]    Compiling plugin v0.2.6
[INFO] [stderr]    Compiling structopt-derive v0.1.6
[INFO] [stderr]    Compiling unic-ucd-segment v0.7.0
[INFO] [stderr]    Compiling mime v0.2.6
[INFO] [stderr]    Compiling mustache v0.8.2
[INFO] [stderr]    Compiling pest_generator v2.1.1
[INFO] [stderr]    Compiling globset v0.2.1
[INFO] [stderr]    Compiling phf_shared v0.7.24
[INFO] [stderr]    Compiling libgit2-sys v0.6.19
[INFO] [stderr]    Compiling docopt v0.8.3
[INFO] [stderr]    Compiling semver v0.8.0
[INFO] [stderr]    Compiling serde_ignored v0.0.4
[INFO] [stderr]    Compiling toml v0.5.3
[INFO] [stderr]    Compiling phf v0.7.24
[INFO] [stderr]    Compiling unic-segment v0.7.0
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]    Compiling openssl-sys v0.9.51
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling filetime v0.2.7
[INFO] [stderr]    Compiling socket2 v0.3.11
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling getrandom v0.1.12
[INFO] [stderr]    Compiling miniz-sys v0.1.12
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling inotify-sys v0.1.3
[INFO] [stderr]    Compiling filetime v0.1.15
[INFO] [stderr]    Compiling jobserver v0.1.17
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling flate2 v1.0.12
[INFO] [stderr]    Compiling backtrace v0.3.38
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling hyper v0.10.16
[INFO] [stderr]    Compiling chrono v0.4.9
[INFO] [stderr]    Compiling msdos_time v0.1.6
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling tar v0.4.26
[INFO] [stderr]    Compiling openssl v0.10.25
[INFO] [stderr]    Compiling flate2 v0.2.20
[INFO] [stderr]    Compiling inotify v0.6.1
[INFO] [stderr]    Compiling ignore v0.2.2
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling bzip2 v0.3.3
[INFO] [stderr]    Compiling error-chain v0.11.0
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling uuid v0.5.1
[INFO] [stderr]    Compiling zip v0.2.8
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling string_cache_codegen v0.4.4
[INFO] [stderr]    Compiling toml-query v0.7.0
[INFO] [stderr]    Compiling rand v0.7.2
[INFO] [stderr]    Compiling mime_guess v1.8.7
[INFO] [stderr]    Compiling mio-extras v2.0.5
[INFO] [stderr]    Compiling epub-builder v0.3.0
[INFO] [stderr]    Compiling ws v0.7.9
[INFO] [stderr]    Compiling notify v4.0.13
[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" "ea50489d46e0d49b86c3835c13e78717e95f7d4c43c1ac9b6ff38d8e938610c1"`
[INFO] running `"docker" "rm" "-f" "ea50489d46e0d49b86c3835c13e78717e95f7d4c43c1ac9b6ff38d8e938610c1"`
[INFO] [stdout] ea50489d46e0d49b86c3835c13e78717e95f7d4c43c1ac9b6ff38d8e938610c1