[INFO] updating cached repository Michael-F-Bryan/mdbook-epub
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Michael-F-Bryan/mdbook-epub
[INFO] [stderr]  * branch              HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Michael-F-Bryan/mdbook-epub" "work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/Michael-F-Bryan/mdbook-epub"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/Michael-F-Bryan/mdbook-epub'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Michael-F-Bryan/mdbook-epub" "work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/Michael-F-Bryan/mdbook-epub"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/Michael-F-Bryan/mdbook-epub'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8923ad4cc630a60389cd4e6e07ecb31f4b441096
[INFO] sha for GitHub repo Michael-F-Bryan/mdbook-epub: 8923ad4cc630a60389cd4e6e07ecb31f4b441096
[INFO] validating manifest of Michael-F-Bryan/mdbook-epub on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Michael-F-Bryan/mdbook-epub on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Michael-F-Bryan/mdbook-epub
[INFO] finished frobbing Michael-F-Bryan/mdbook-epub
[INFO] frobbed toml for Michael-F-Bryan/mdbook-epub written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/Michael-F-Bryan/mdbook-epub/Cargo.toml
[INFO] started frobbing Michael-F-Bryan/mdbook-epub
[INFO] finished frobbing Michael-F-Bryan/mdbook-epub
[INFO] frobbed toml for Michael-F-Bryan/mdbook-epub written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/Michael-F-Bryan/mdbook-epub/Cargo.toml
[INFO] crate Michael-F-Bryan/mdbook-epub already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking Michael-F-Bryan/mdbook-epub against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-6/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/Michael-F-Bryan/mdbook-epub:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] af3ea8b1e25862548974ea2f08a2f20208e04e9906e0169fec145035591e3e2a
[INFO] running `"docker" "start" "-a" "af3ea8b1e25862548974ea2f08a2f20208e04e9906e0169fec145035591e3e2a"`
[INFO] [stderr]    Compiling crossbeam v0.2.12
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]    Compiling shell-escape v0.1.4
[INFO] [stderr]    Compiling home v0.3.4
[INFO] [stderr]    Compiling hex v0.2.0
[INFO] [stderr]     Checking strum v0.11.0
[INFO] [stderr]     Checking is-match v0.1.0
[INFO] [stderr]    Compiling openssl-sys v0.9.41
[INFO] [stderr]    Compiling cmake v0.1.35
[INFO] [stderr]    Compiling curl-sys v0.4.16
[INFO] [stderr]    Compiling miniz_oxide_c_api v0.2.1
[INFO] [stderr]    Compiling socket2 v0.3.8
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling filetime v0.2.4
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling filetime v0.1.15
[INFO] [stderr]    Compiling jobserver v0.1.12
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling miniz-sys v0.1.11
[INFO] [stderr]     Checking bzip2-sys v0.1.7
[INFO] [stderr]    Compiling serde_ignored v0.0.4
[INFO] [stderr]    Compiling semver v0.8.0
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]     Checking mustache v0.8.2
[INFO] [stderr]    Compiling libgit2-sys v0.6.19
[INFO] [stderr]    Compiling syn v0.15.27
[INFO] [stderr]    Compiling tar v0.4.20
[INFO] [stderr]    Compiling backtrace v0.3.14
[INFO] [stderr]    Compiling flate2 v0.2.20
[INFO] [stderr]     Checking hyper v0.10.15
[INFO] [stderr]     Checking bzip2 v0.3.3
[INFO] [stderr]    Compiling libssh2-sys v0.2.11
[INFO] [stderr]    Compiling openssl v0.10.18
[INFO] [stderr]     Checking structopt v0.1.7
[INFO] [stderr]     Checking error-chain v0.11.0
[INFO] [stderr]    Compiling globset v0.2.1
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]     Checking flate2 v1.0.6
[INFO] [stderr]     Checking ws v0.7.9
[INFO] [stderr]     Checking toml-query v0.7.0
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]     Checking zip v0.2.8
[INFO] [stderr]     Checking zip v0.4.2
[INFO] [stderr]     Checking epub-builder v0.3.0
[INFO] [stderr]     Checking mime_guess v1.8.6
[INFO] [stderr]    Compiling ignore v0.2.2
[INFO] [stderr] error[E0283]: type annotations required: cannot resolve `std::string::String: std::convert::AsRef<_>`
[INFO] [stderr]    --> /opt/crater/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]     Checking iron v0.6.0
[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" "af3ea8b1e25862548974ea2f08a2f20208e04e9906e0169fec145035591e3e2a"`
[INFO] running `"docker" "rm" "-f" "af3ea8b1e25862548974ea2f08a2f20208e04e9906e0169fec145035591e3e2a"`
[INFO] [stdout] af3ea8b1e25862548974ea2f08a2f20208e04e9906e0169fec145035591e3e2a