[INFO] cloning repository https://github.com/jacob-pro/mdbook-bibfile-referencing
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jacob-pro/mdbook-bibfile-referencing" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjacob-pro%2Fmdbook-bibfile-referencing", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjacob-pro%2Fmdbook-bibfile-referencing'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bd54476ca14f50ad8ed88bbb273c4fd80e3989b5
[INFO] testing jacob-pro/mdbook-bibfile-referencing against beta-2021-09-12 for beta-1.56-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjacob-pro%2Fmdbook-bibfile-referencing" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jacob-pro/mdbook-bibfile-referencing on toolchain beta-2021-09-12
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-12" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jacob-pro/mdbook-bibfile-referencing
[INFO] finished tweaking git repo https://github.com/jacob-pro/mdbook-bibfile-referencing
[INFO] tweaked toml for git repo https://github.com/jacob-pro/mdbook-bibfile-referencing written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate git repo https://github.com/jacob-pro/mdbook-bibfile-referencing already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-12" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pandoc v0.8.5
[INFO] [stderr]   Downloaded handlebars v4.1.0
[INFO] [stderr]   Downloaded mdbook v0.4.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-12" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3cb42de086a705c1839a17d7634f7af0e65831107ae698da539ba7374b0b84b9
[INFO] running `Command { std: "docker" "start" "-a" "3cb42de086a705c1839a17d7634f7af0e65831107ae698da539ba7374b0b84b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3cb42de086a705c1839a17d7634f7af0e65831107ae698da539ba7374b0b84b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cb42de086a705c1839a17d7634f7af0e65831107ae698da539ba7374b0b84b9", kill_on_drop: false }`
[INFO] [stdout] 3cb42de086a705c1839a17d7634f7af0e65831107ae698da539ba7374b0b84b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-12" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6df11f4379fcae7b5753970550ab06b19015609674dbf0c2601971e7bf446582
[INFO] running `Command { std: "docker" "start" "-a" "6df11f4379fcae7b5753970550ab06b19015609674dbf0c2601971e7bf446582", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling pulldown-cmark v0.7.2
[INFO] [stderr]    Compiling quick-error v2.0.1
[INFO] [stderr]    Compiling shlex v1.0.0
[INFO] [stderr]    Compiling version-compare v0.0.10
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling pandoc v0.8.5
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pandoc-0.8.5/src/lib.rs:1046:14
[INFO] [stdout]      |
[INFO] [stdout] 1046 |             .intersperse(PATH_DELIMIT)
[INFO] [stdout]      |              ^^^^^^^^^^^ multiple `intersperse` found
[INFO] [stdout]      |
[INFO] [stdout]      = note: candidate #1 is defined in an impl of the trait `Iterator` for the type `std::iter::Chain<A, B>`
[INFO] [stdout]      = note: candidate #2 is defined in an impl of the trait `Itertools` for the type `T`
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]      |
[INFO] [stdout] 1034 ~         let path: String = Iterator::intersperse(self
[INFO] [stdout] 1035 +             .latex_path_hint
[INFO] [stdout] 1036 +             .iter()
[INFO] [stdout] 1037 +             .chain(self.pandoc_path_hint.iter())
[INFO] [stdout] 1038 +             .map(|p| p.to_str().expect("non-utf8 path"))
[INFO] [stdout] 1039 +             .chain(PANDOC_PATH.iter().cloned())
[INFO] [stdout]    ...
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]      |
[INFO] [stdout] 1034 ~         let path: String = Itertools::intersperse(self
[INFO] [stdout] 1035 +             .latex_path_hint
[INFO] [stdout] 1036 +             .iter()
[INFO] [stdout] 1037 +             .chain(self.pandoc_path_hint.iter())
[INFO] [stdout] 1038 +             .map(|p| p.to_str().expect("non-utf8 path"))
[INFO] [stdout] 1039 +             .chain(PANDOC_PATH.iter().cloned())
[INFO] [stdout]    ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0034`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pandoc` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "6df11f4379fcae7b5753970550ab06b19015609674dbf0c2601971e7bf446582", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6df11f4379fcae7b5753970550ab06b19015609674dbf0c2601971e7bf446582", kill_on_drop: false }`
[INFO] [stdout] 6df11f4379fcae7b5753970550ab06b19015609674dbf0c2601971e7bf446582