[INFO] updating cached repository the-lobster/liter2
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/the-lobster/liter2
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/the-lobster/liter2" "work/ex/beta-1.38-1/sources/1.37.0/gh/the-lobster/liter2"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/the-lobster/liter2'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/the-lobster/liter2" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/the-lobster/liter2"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/the-lobster/liter2'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 60c732d2abde946ec49c7822da7ad2818e995942
[INFO] sha for GitHub repo the-lobster/liter2: 60c732d2abde946ec49c7822da7ad2818e995942
[INFO] validating manifest of the-lobster/liter2 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of the-lobster/liter2 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing the-lobster/liter2
[INFO] finished frobbing the-lobster/liter2
[INFO] frobbed toml for the-lobster/liter2 written to work/ex/beta-1.38-1/sources/1.37.0/gh/the-lobster/liter2/Cargo.toml
[INFO] started frobbing the-lobster/liter2
[INFO] finished frobbing the-lobster/liter2
[INFO] frobbed toml for the-lobster/liter2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/the-lobster/liter2/Cargo.toml
[INFO] crate the-lobster/liter2 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing the-lobster/liter2 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/the-lobster/liter2:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 54aa44d30c89cdca9900bc51e16f6bddbff457e73800f2497b7c85d2172a38cf
[INFO] running `"docker" "start" "-a" "54aa44d30c89cdca9900bc51e16f6bddbff457e73800f2497b7c85d2172a38cf"`
[INFO] [stderr]    Compiling nodrop v0.1.12
[INFO] [stderr]    Compiling openssl-sys v0.9.25
[INFO] [stderr]    Compiling termion v1.5.1
[INFO] [stderr]    Compiling utf-8 v0.6.0
[INFO] [stderr]    Compiling bytes v0.4.6
[INFO] [stderr]    Compiling clap v2.30.0
[INFO] [stderr]    Compiling mio v0.6.13
[INFO] [stderr]    Compiling uuid v0.3.1
[INFO] [stderr]    Compiling mustache v0.8.2
[INFO] [stderr]    Compiling cssparser v0.5.8
[INFO] [stderr]    Compiling quickersort v2.2.0
[INFO] [stderr]    Compiling tendril v0.2.4
[INFO] [stderr]    Compiling chrono v0.2.25
[INFO] [stderr]    Compiling phf_generator v0.7.21
[INFO] [stderr]    Compiling error-chain v0.7.2
[INFO] [stderr]    Compiling error-chain v0.10.0
[INFO] [stderr]    Compiling tokio-io v0.1.5
[INFO] [stderr]    Compiling phf_codegen v0.7.21
[INFO] [stderr]    Compiling string_cache v0.2.29
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.3
[INFO] [stderr]    Compiling html5ever v0.5.4
[INFO] [stderr]    Compiling epub-builder v0.1.2
[INFO] [stderr]    Compiling tokio-core v0.1.12
[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-0.1.2/src/epub.rs:208:74
[INFO] [stderr]     |
[INFO] [stderr] 208 |         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" "54aa44d30c89cdca9900bc51e16f6bddbff457e73800f2497b7c85d2172a38cf"`
[INFO] running `"docker" "rm" "-f" "54aa44d30c89cdca9900bc51e16f6bddbff457e73800f2497b7c85d2172a38cf"`
[INFO] [stdout] 54aa44d30c89cdca9900bc51e16f6bddbff457e73800f2497b7c85d2172a38cf