[INFO] cloning repository https://github.com/jackwillis/font-metrics
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jackwillis/font-metrics" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjackwillis%2Ffont-metrics", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjackwillis%2Ffont-metrics'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c24318bffa11feeb118b379eca016471bb5633a5
[INFO] documenting jackwillis/font-metrics against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjackwillis%2Ffont-metrics" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jackwillis/font-metrics on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jackwillis/font-metrics
[INFO] finished tweaking git repo https://github.com/jackwillis/font-metrics
[INFO] tweaked toml for git repo https://github.com/jackwillis/font-metrics written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/jackwillis/font-metrics already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded adobe-cmap-parser v0.3.2
[INFO] [stderr]   Downloaded lopdf v0.15.1
[INFO] [stderr]   Downloaded pdf-extract v0.4.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bbfe573749a1e3eb3e00beca25f004da433619791d7cb0e44e741ac6af6a4ce9
[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" "bbfe573749a1e3eb3e00beca25f004da433619791d7cb0e44e741ac6af6a4ce9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bbfe573749a1e3eb3e00beca25f004da433619791d7cb0e44e741ac6af6a4ce9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbfe573749a1e3eb3e00beca25f004da433619791d7cb0e44e741ac6af6a4ce9", kill_on_drop: false }`
[INFO] [stdout] bbfe573749a1e3eb3e00beca25f004da433619791d7cb0e44e741ac6af6a4ce9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "RUSTDOCFLAGS=--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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cd4173432145beb6735bd9268060279293efe028de8c944b962c23400ecd6236
[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" "cd4173432145beb6735bd9268060279293efe028de8c944b962c23400ecd6236", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling num-integer v0.1.38
[INFO] [stderr]    Compiling heapsize v0.4.2
[INFO] [stderr]     Checking pom v1.1.0
[INFO] [stderr]     Checking linked-hash-map v0.3.0
[INFO] [stderr]     Checking itoa v0.3.4
[INFO] [stderr]     Checking postscript v0.11.1
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]    Compiling miniz-sys v0.1.10
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking ordered-float v0.5.0
[INFO] [stderr]     Checking clap v2.31.2
[INFO] [stderr]     Checking rusttype v0.6.1
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking type1-encoding-parser v0.1.0
[INFO] [stderr]     Checking adobe-cmap-parser v0.3.2
[INFO] [stderr]     Checking num-iter v0.1.37
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking euclid v0.15.6
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking chrono v0.3.0
[INFO] [stderr]     Checking flate2 v0.2.20
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking lopdf v0.15.1
[INFO] [stderr]     Checking pdf-extract v0.4.3
[INFO] [stderr]     Checking font_metrics v0.0.4 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting font_metrics v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected one of `,`, `.`, `?`, `}`, or an operator, found reserved identifier `_`
[INFO] [stdout]    --> bin/fm-fit.rs:181:13
[INFO] [stdout]     |
[INFO] [stdout] 180 |             "russian" => include_str!("../resources/russian.example.tex")
[INFO] [stdout]     |                       -- while parsing the `match` arm starting here     - expected one of `,`, `.`, `?`, `}`, or an operator
[INFO] [stdout] 181 |             _ => "uh oh",
[INFO] [stdout]     |             ^ unexpected token
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `font_metrics`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name fm_fit bin/fm-fit.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern clap=/opt/rustwide/target/debug/deps/libclap-d154847ac8fb2968.rmeta --extern font_metrics=/opt/rustwide/target/debug/deps/libfont_metrics-89d66e4fbbe97da1.rmeta --extern lopdf=/opt/rustwide/target/debug/deps/liblopdf-2d3f0064d92b0885.rmeta --extern num_rational=/opt/rustwide/target/debug/deps/libnum_rational-90f6b4665b6453e9.rmeta --extern pdf_extract=/opt/rustwide/target/debug/deps/libpdf_extract-be2674580604e3c3.rmeta --extern rusttype=/opt/rustwide/target/debug/deps/librusttype-a543a5e39f33a8b5.rmeta --extern tempdir=/opt/rustwide/target/debug/deps/libtempdir-826a957df3255ce5.rmeta --cap-lints=warn --crate-version 0.0.4` (exit code: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "cd4173432145beb6735bd9268060279293efe028de8c944b962c23400ecd6236", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd4173432145beb6735bd9268060279293efe028de8c944b962c23400ecd6236", kill_on_drop: false }`
[INFO] [stdout] cd4173432145beb6735bd9268060279293efe028de8c944b962c23400ecd6236