[INFO] crate mdbookshelf 0.1.1 is already in cache
[INFO] checking mdbookshelf-0.1.1 against master#fdc0011561c6365c596dfd8fa1ef388162bc89c7 for pr-66504-1
[INFO] extracting crate mdbookshelf 0.1.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate mdbookshelf 0.1.1 on toolchain fdc0011561c6365c596dfd8fa1ef388162bc89c7
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate mdbookshelf 0.1.1
[INFO] finished tweaking crates.io crate mdbookshelf 0.1.1
[INFO] tweaked toml for crates.io crate mdbookshelf 0.1.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1c2654696cf83c166310f8df3d0872f6ce35664b8450b2b48a8d4ee4bed784e4
[INFO] running `"docker" "start" "-a" "1c2654696cf83c166310f8df3d0872f6ce35664b8450b2b48a8d4ee4bed784e4"`
[INFO] [stderr]    Compiling openssl-probe v0.1.2
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]    Compiling crossbeam v0.2.12
[INFO] [stderr]    Compiling scoped-tls v0.1.2
[INFO] [stderr]    Compiling shell-escape v0.1.4
[INFO] [stderr]    Compiling home v0.3.4
[INFO] [stderr]    Compiling hex v0.2.0
[INFO] [stderr]    Compiling crossbeam v0.3.2
[INFO] [stderr]    Compiling termcolor v0.3.6
[INFO] [stderr]     Checking is-match v0.1.0
[INFO] [stderr]     Checking strum v0.15.0
[INFO] [stderr]     Checking open v1.3.2
[INFO] [stderr]    Compiling foreign-types v0.3.2
[INFO] [stderr]     Checking inotify-sys v0.1.3
[INFO] [stderr]    Compiling socket2 v0.3.11
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling filetime v0.2.8
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling filetime v0.1.15
[INFO] [stderr]    Compiling num_cpus v1.11.1
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling jobserver v0.1.17
[INFO] [stderr]    Compiling openssl-sys v0.9.53
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling miniz-sys v0.1.12
[INFO] [stderr]     Checking bzip2-sys v0.1.7
[INFO] [stderr]    Compiling structopt-derive v0.1.6
[INFO] [stderr]     Checking msdos_time v0.1.6
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking inotify v0.6.1
[INFO] [stderr]    Compiling tar v0.4.26
[INFO] [stderr]     Checking mustache v0.8.2
[INFO] [stderr]    Compiling curl v0.4.25
[INFO] [stderr]     Checking curl-sys v0.4.24
[INFO] [stderr]     Checking libssh2-sys v0.2.13
[INFO] [stderr]    Compiling backtrace v0.3.40
[INFO] [stderr]    Compiling flate2 v0.2.20
[INFO] [stderr]     Checking bzip2 v0.3.3
[INFO] [stderr]     Checking uuid v0.5.1
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking structopt v0.1.7
[INFO] [stderr]     Checking hyper v0.10.16
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling openssl v0.10.26
[INFO] [stderr]     Checking error-chain v0.12.1
[INFO] [stderr]    Compiling globset v0.2.1
[INFO] [stderr]    Compiling html5ever v0.22.5
[INFO] [stderr]    Compiling strum_macros v0.15.0
[INFO] [stderr]     Checking libgit2-sys v0.6.19
[INFO] [stderr]     Checking zip v0.2.8
[INFO] [stderr]    Compiling error-chain v0.11.0
[INFO] [stderr]     Checking ws v0.7.9
[INFO] [stderr]     Checking notify v4.0.14
[INFO] [stderr]    Compiling string_cache_codegen v0.4.4
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling docopt v0.8.3
[INFO] [stderr]    Compiling semver v0.8.0
[INFO] [stderr]    Compiling serde_ignored v0.0.4
[INFO] [stderr]     Checking toml v0.5.5
[INFO] [stderr]     Checking git2 v0.6.11
[INFO] [stderr]    Compiling ignore v0.2.2
[INFO] [stderr]     Checking epub-builder v0.3.0
[INFO] [stderr]    Compiling crates-io v0.13.0
[INFO] [stderr] error[E0283]: type annotations needed: cannot resolve `std::string::String: std::convert::AsRef<_>`
[INFO] [stderr]    --> /opt/rustwide/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[E0283]: type annotations needed: cannot resolve `std::string::String: std::convert::AsRef<_>`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/epub-builder-0.3.0/src/epub.rs:311:53
[INFO] [stderr]     |
[INFO] [stderr] 311 |         let mut file = Content::new(content.toc.url.as_ref(), "application/xhtml+xml");
[INFO] [stderr]     |                                                     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[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" "1c2654696cf83c166310f8df3d0872f6ce35664b8450b2b48a8d4ee4bed784e4"`
[INFO] running `"docker" "rm" "-f" "1c2654696cf83c166310f8df3d0872f6ce35664b8450b2b48a8d4ee4bed784e4"`
[INFO] [stdout] 1c2654696cf83c166310f8df3d0872f6ce35664b8450b2b48a8d4ee4bed784e4