[INFO] crate mdbook-epub 0.2.0 is already in cache
[INFO] extracting crate mdbook-epub 0.2.0 into work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/reg/mdbook-epub/0.2.0
[INFO] extracting crate mdbook-epub 0.2.0 into work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/reg/mdbook-epub/0.2.0
[INFO] validating manifest of mdbook-epub-0.2.0 on toolchain master#6ea4036cd20a4b1ab1d56e555108c21735ff6946
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mdbook-epub-0.2.0 on toolchain try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+003a7b6b5753e8509fdfe7949d4f0873ba71e4fc-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mdbook-epub-0.2.0
[INFO] finished frobbing mdbook-epub-0.2.0
[INFO] frobbed toml for mdbook-epub-0.2.0 written to work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/reg/mdbook-epub/0.2.0/Cargo.toml
[INFO] started frobbing mdbook-epub-0.2.0
[INFO] finished frobbing mdbook-epub-0.2.0
[INFO] frobbed toml for mdbook-epub-0.2.0 written to work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/reg/mdbook-epub/0.2.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+003a7b6b5753e8509fdfe7949d4f0873ba71e4fc-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+003a7b6b5753e8509fdfe7949d4f0873ba71e4fc-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking mdbook-epub-0.2.0 against try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc for pr-62181
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62181/worker-6/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/reg/mdbook-epub/0.2.0:/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" "+003a7b6b5753e8509fdfe7949d4f0873ba71e4fc-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c3e61cd558315f0433279c026783aefcc9e5275e897895ba0d9284eb82e977b4
[INFO] running `"docker" "start" "-a" "c3e61cd558315f0433279c026783aefcc9e5275e897895ba0d9284eb82e977b4"`
[INFO] [stderr]    Compiling same-file v0.1.3
[INFO] [stderr]    Compiling crossbeam v0.2.12
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]    Compiling crossbeam v0.3.2
[INFO] [stderr]    Compiling hex v0.2.0
[INFO] [stderr]    Compiling shell-escape v0.1.4
[INFO] [stderr]    Compiling home v0.3.4
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]    Compiling termcolor v0.3.6
[INFO] [stderr]     Checking is-match v0.1.0
[INFO] [stderr]    Compiling walkdir v1.0.7
[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 filetime v0.1.15
[INFO] [stderr]    Compiling jobserver v0.1.14
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling openssl-sys v0.9.47
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling backtrace-sys v0.1.30
[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]     Checking mustache v0.8.2
[INFO] [stderr]     Checking miniz_oxide_c_api v0.2.2
[INFO] [stderr]    Compiling structopt-derive v0.1.6
[INFO] [stderr]    Compiling tar v0.4.25
[INFO] [stderr]     Checking msdos_time v0.1.6
[INFO] [stderr]    Compiling curl v0.4.22
[INFO] [stderr]    Compiling flate2 v0.2.20
[INFO] [stderr]    Compiling backtrace v0.3.32
[INFO] [stderr]     Checking bzip2 v0.3.3
[INFO] [stderr]     Checking rand_chacha v0.2.0
[INFO] [stderr]     Checking flate2 v1.0.9
[INFO] [stderr]     Checking uuid v0.5.1
[INFO] [stderr]     Checking structopt v0.1.7
[INFO] [stderr]    Compiling pest_generator v2.1.0
[INFO] [stderr]    Compiling strum_macros v0.15.0
[INFO] [stderr]     Checking error-chain v0.12.1
[INFO] [stderr]    Compiling libssh2-sys v0.2.11
[INFO] [stderr]    Compiling curl-sys v0.4.20
[INFO] [stderr]    Compiling openssl v0.10.23
[INFO] [stderr]    Compiling globset v0.2.1
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]     Checking ws v0.7.9
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling docopt v0.8.3
[INFO] [stderr]     Checking zip v0.2.8
[INFO] [stderr]     Checking zip v0.4.2
[INFO] [stderr]     Checking toml-query v0.7.0
[INFO] [stderr]    Compiling error-chain v0.11.0
[INFO] [stderr]    Compiling libgit2-sys v0.6.19
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking epub-builder v0.3.0
[INFO] [stderr]    Compiling ignore v0.2.2
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling markup5ever v0.7.5
[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" "c3e61cd558315f0433279c026783aefcc9e5275e897895ba0d9284eb82e977b4"`
[INFO] running `"docker" "rm" "-f" "c3e61cd558315f0433279c026783aefcc9e5275e897895ba0d9284eb82e977b4"`
[INFO] [stdout] c3e61cd558315f0433279c026783aefcc9e5275e897895ba0d9284eb82e977b4