[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/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/the-lobster/liter2"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/the-lobster/liter2'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/the-lobster/liter2" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/the-lobster/liter2"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/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 master#c43d03a19f326f4a323569328cc501e86eb6d22e
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of the-lobster/liter2 on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "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/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/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/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/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" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking the-lobster/liter2 against master#c43d03a19f326f4a323569328cc501e86eb6d22e for pr-63565
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-7/master#c43d03a19f326f4a323569328cc501e86eb6d22e:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/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=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" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 8aaadc297f6c4a727ee4af58b8030ddc867560d28a1c8e2ac0a84487870c100f
[INFO] running `"docker" "start" "-a" "8aaadc297f6c4a727ee4af58b8030ddc867560d28a1c8e2ac0a84487870c100f"`
[INFO] [stderr]     Checking ego-tree v0.1.1
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling openssl-sys v0.9.25
[INFO] [stderr]    Compiling miniz_oxide_c_api v0.1.2
[INFO] [stderr]    Compiling bzip2-sys v0.1.6
[INFO] [stderr]     Checking miniz_oxide v0.1.2
[INFO] [stderr]     Checking utf-8 v0.6.0
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking msdos_time v0.1.5
[INFO] [stderr]     Checking quickersort v2.2.0
[INFO] [stderr]     Checking serde_json v1.0.9
[INFO] [stderr]     Checking clap v2.30.0
[INFO] [stderr]     Checking mio v0.6.13
[INFO] [stderr]     Checking mustache v0.8.2
[INFO] [stderr]     Checking tokio-io v0.1.5
[INFO] [stderr]     Checking uuid v0.3.1
[INFO] [stderr]     Checking uuid v0.5.1
[INFO] [stderr]    Compiling structopt-derive v0.1.6
[INFO] [stderr]     Checking cssparser v0.5.8
[INFO] [stderr]    Compiling rand v0.3.22
[INFO] [stderr]     Checking tendril v0.2.4
[INFO] [stderr]     Checking serde_urlencoded v0.5.1
[INFO] [stderr]     Checking chrono v0.2.25
[INFO] [stderr]     Checking tokio-core v0.1.12
[INFO] [stderr]     Checking error-chain v0.7.2
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]     Checking tempdir v0.3.6
[INFO] [stderr]    Compiling phf_generator v0.7.21
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]     Checking flate2 v1.0.1
[INFO] [stderr]     Checking bzip2 v0.3.2
[INFO] [stderr]    Compiling phf_codegen v0.7.21
[INFO] [stderr]    Compiling string_cache v0.2.29
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.3
[INFO] [stderr]    Compiling html5ever v0.5.4
[INFO] [stderr]     Checking zip v0.2.8
[INFO] [stderr]     Checking tokio-proto v0.1.1
[INFO] [stderr]     Checking epub-builder v0.1.2
[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-0.1.2/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" "8aaadc297f6c4a727ee4af58b8030ddc867560d28a1c8e2ac0a84487870c100f"`
[INFO] running `"docker" "rm" "-f" "8aaadc297f6c4a727ee4af58b8030ddc867560d28a1c8e2ac0a84487870c100f"`
[INFO] [stdout] 8aaadc297f6c4a727ee4af58b8030ddc867560d28a1c8e2ac0a84487870c100f