[INFO] fetching crate mdbookshelf 0.1.1...
[INFO] extracting crate mdbookshelf 0.1.1 into work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/mdbookshelf/0.1.1
[INFO] extracting crate mdbookshelf 0.1.1 into work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/mdbookshelf/0.1.1
[INFO] validating manifest of mdbookshelf-0.1.1 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 mdbookshelf-0.1.1 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 mdbookshelf-0.1.1
[INFO] finished frobbing mdbookshelf-0.1.1
[INFO] frobbed toml for mdbookshelf-0.1.1 written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/mdbookshelf/0.1.1/Cargo.toml
[INFO] started frobbing mdbookshelf-0.1.1
[INFO] finished frobbing mdbookshelf-0.1.1
[INFO] frobbed toml for mdbookshelf-0.1.1 written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/mdbookshelf/0.1.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mdbook-epub v0.2.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking mdbookshelf-0.1.1 against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-3/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/mdbookshelf/0.1.1:/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] f9233974da0762312531141fe3e0cbec163d462fd7e4c9e776f1dd7cd9fd9091
[INFO] running `"docker" "start" "-a" "f9233974da0762312531141fe3e0cbec163d462fd7e4c9e776f1dd7cd9fd9091"`
[INFO] [stderr]    Compiling crossbeam v0.2.12
[INFO] [stderr]    Compiling crossbeam v0.3.2
[INFO] [stderr]    Compiling hex v0.2.0
[INFO] [stderr]     Checking is-match v0.1.0
[INFO] [stderr]    Compiling socket2 v0.3.9
[INFO] [stderr]    Compiling filetime v0.2.5
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling jobserver v0.1.14
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling filetime v0.1.15
[INFO] [stderr]     Checking inotify-sys v0.1.3
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling openssl-sys v0.9.47
[INFO] [stderr]    Compiling miniz-sys v0.1.12
[INFO] [stderr]    Compiling tar v0.4.25
[INFO] [stderr]     Checking inotify v0.6.1
[INFO] [stderr]     Checking libssh2-sys v0.2.11
[INFO] [stderr]     Checking curl-sys v0.4.19
[INFO] [stderr]    Compiling pest_generator v2.1.0
[INFO] [stderr]    Compiling strum_macros v0.15.0
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]     Checking tempfile v3.0.8
[INFO] [stderr]     Checking uuid v0.5.1
[INFO] [stderr]    Compiling flate2 v0.2.20
[INFO] [stderr]     Checking structopt v0.1.7
[INFO] [stderr]    Compiling globset v0.2.1
[INFO] [stderr]    Compiling error-chain v0.11.0
[INFO] [stderr]    Compiling openssl v0.10.23
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]     Checking libgit2-sys v0.6.19
[INFO] [stderr]     Checking ws v0.7.9
[INFO] [stderr]     Checking notify v4.0.12
[INFO] [stderr]    Compiling docopt v0.8.3
[INFO] [stderr]    Compiling serde_ignored v0.0.4
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling semver v0.8.0
[INFO] [stderr]     Checking toml v0.5.1
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]    Compiling curl v0.4.22
[INFO] [stderr]    Compiling mime_guess v1.8.7
[INFO] [stderr]     Checking git2 v0.6.11
[INFO] [stderr]     Checking epub-builder v0.3.0
[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] 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" "f9233974da0762312531141fe3e0cbec163d462fd7e4c9e776f1dd7cd9fd9091"`
[INFO] running `"docker" "rm" "-f" "f9233974da0762312531141fe3e0cbec163d462fd7e4c9e776f1dd7cd9fd9091"`
[INFO] [stdout] f9233974da0762312531141fe3e0cbec163d462fd7e4c9e776f1dd7cd9fd9091