[INFO] fetching crate mdbook-bibfile-referencing 0.1.0...
[INFO] testing mdbook-bibfile-referencing-0.1.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate mdbook-bibfile-referencing 0.1.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate mdbook-bibfile-referencing 0.1.0 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mdbook-bibfile-referencing 0.1.0
[INFO] finished tweaking crates.io crate mdbook-bibfile-referencing 0.1.0
[INFO] tweaked toml for crates.io crate mdbook-bibfile-referencing 0.1.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate crates.io crate mdbook-bibfile-referencing 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded redox_syscall v0.2.9
[INFO] [stderr]   Downloaded clap v3.0.0-beta.2
[INFO] [stderr]   Downloaded clap_derive v3.0.0-beta.2
[INFO] [stderr]   Downloaded syn v1.0.73
[INFO] [stderr]   Downloaded libc v0.2.98
[INFO] [stderr]   Downloaded pandoc v0.8.5
[INFO] [stderr]   Downloaded os_str_bytes v2.4.0
[INFO] [stderr]   Downloaded version-compare v0.0.10
[INFO] [stderr]   Downloaded textwrap v0.12.1
[INFO] [stderr]   Downloaded handlebars v4.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1e1d382d54715345813d858373ffc6f50513729fdbe7a4c1d9a0f4c2d3c2e295
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1e1d382d54715345813d858373ffc6f50513729fdbe7a4c1d9a0f4c2d3c2e295", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e1d382d54715345813d858373ffc6f50513729fdbe7a4c1d9a0f4c2d3c2e295", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e1d382d54715345813d858373ffc6f50513729fdbe7a4c1d9a0f4c2d3c2e295", kill_on_drop: false }`
[INFO] [stdout] 1e1d382d54715345813d858373ffc6f50513729fdbe7a4c1d9a0f4c2d3c2e295
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eecbf47f34f3801a14b5599215718a70f9d404f2cf7571cdd62c21af7b796e82
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "eecbf47f34f3801a14b5599215718a70f9d404f2cf7571cdd62c21af7b796e82", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling shlex v1.0.0
[INFO] [stderr]    Compiling pandoc v0.8.5
[INFO] [stderr]    Compiling which v4.1.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling pulldown-cmark v0.7.2
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stderr]    Compiling open v1.7.0
[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" "eecbf47f34f3801a14b5599215718a70f9d404f2cf7571cdd62c21af7b796e82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eecbf47f34f3801a14b5599215718a70f9d404f2cf7571cdd62c21af7b796e82", kill_on_drop: false }`
[INFO] [stdout] eecbf47f34f3801a14b5599215718a70f9d404f2cf7571cdd62c21af7b796e82