[INFO] cloning repository https://github.com/cassaundra/lang-char-freq
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cassaundra/lang-char-freq" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcassaundra%2Flang-char-freq", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcassaundra%2Flang-char-freq'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4e55f803615c4665e2d95e6b06e986931c7499ac
[INFO] documenting cassaundra/lang-char-freq against 1.47.0 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcassaundra%2Flang-char-freq" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cassaundra/lang-char-freq on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cassaundra/lang-char-freq
[INFO] finished tweaking git repo https://github.com/cassaundra/lang-char-freq
[INFO] tweaked toml for git repo https://github.com/cassaundra/lang-char-freq written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/cassaundra/lang-char-freq already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "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" "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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b269244b1399cac1380116ebfb48f29fb615fad5b3a96e2bb0f202a3fc08ccdd
[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" "b269244b1399cac1380116ebfb48f29fb615fad5b3a96e2bb0f202a3fc08ccdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b269244b1399cac1380116ebfb48f29fb615fad5b3a96e2bb0f202a3fc08ccdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b269244b1399cac1380116ebfb48f29fb615fad5b3a96e2bb0f202a3fc08ccdd", kill_on_drop: false }`
[INFO] [stdout] b269244b1399cac1380116ebfb48f29fb615fad5b3a96e2bb0f202a3fc08ccdd
[INFO] running `Command { std: "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" "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" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 89970d08ca233fff6d9ee7f501e3c05d53ef8f272d600b1fb077461015fc569f
[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" "89970d08ca233fff6d9ee7f501e3c05d53ef8f272d600b1fb077461015fc569f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]     Checking futures-sink v0.3.4
[INFO] [stderr]    Compiling serde v1.0.105
[INFO] [stderr]     Checking arc-swap v0.4.5
[INFO] [stderr]     Checking futures-io v0.3.4
[INFO] [stderr]     Checking pin-project-lite v0.1.4
[INFO] [stderr]     Checking futures-task v0.3.4
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling palette v0.5.0
[INFO] [stderr]    Compiling encoding_rs v0.8.22
[INFO] [stderr]     Checking float-ord v0.2.0
[INFO] [stderr]     Checking podio v0.1.6
[INFO] [stderr]    Compiling cmake v0.1.42
[INFO] [stderr]    Compiling bzip2-sys v0.1.8+1.0.8
[INFO] [stderr]    Compiling openssl-sys v0.9.55
[INFO] [stderr]    Compiling servo-fontconfig-sys v4.0.9
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking tracing-core v0.1.10
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking sharded-slab v0.0.8
[INFO] [stderr]     Checking http v0.2.1
[INFO] [stderr]     Checking futures-channel v0.3.4
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking indexmap v1.3.2
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking filetime v0.2.9
[INFO] [stderr]     Checking xattr v0.2.2
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking jpeg-decoder v0.1.18
[INFO] [stderr]     Checking stb_truetype v0.3.1
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]     Checking flate2 v1.0.14
[INFO] [stderr]     Checking euclid v0.20.8
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking tracing-log v0.1.1
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]    Compiling servo-freetype-sys v4.0.5
[INFO] [stderr]    Compiling expat-sys v2.1.6
[INFO] [stderr]     Checking tar v0.4.26
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking png v0.15.3
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]     Checking rusttype v0.8.2
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]    Compiling openssl v0.10.29
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]     Checking bzip2 v0.3.3
[INFO] [stderr]     Checking freetype v0.4.1
[INFO] [stderr]     Checking regex v1.3.6
[INFO] [stderr]     Checking image v0.22.5
[INFO] [stderr]     Checking lyon_geom v0.14.1
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking servo-fontconfig v0.4.0
[INFO] [stderr]     Checking zip v0.5.5
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]     Checking lyon_path v0.14.0
[INFO] [stderr]     Checking font-kit v0.4.0
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling serde_derive v1.0.105
[INFO] [stderr]    Compiling pin-project-internal v0.4.8
[INFO] [stderr]    Compiling rustversion v1.0.3
[INFO] [stderr]    Compiling palette_derive v0.5.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.7
[INFO] [stderr]     Checking tokio v0.2.13
[INFO] [stderr]    Compiling err-derive v0.2.4
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking tracing v0.1.13
[INFO] [stderr]     Checking pin-project v0.4.8
[INFO] [stderr]     Checking plotters v0.2.12
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-tls v0.3.0
[INFO] [stderr]     Checking h2 v0.2.4
[INFO] [stderr]     Checking hyper v0.13.4
[INFO] [stderr]     Checking hyper-tls v0.4.1
[INFO] [stderr]     Checking serde_json v1.0.50
[INFO] [stderr]     Checking tracing-serde v0.1.1
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking tracing-subscriber v0.2.4
[INFO] [stderr]     Checking reqwest v0.10.4
[INFO] [stderr]  Documenting lang-char-freq v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: 1 positional argument in format string, but no arguments were given
[INFO] [stdout]  --> src/error.rs:7:35
[INFO] [stdout]   |
[INFO] [stdout] 7 |     #[error(display = "I/O error: {}")]
[INFO] [stdout]   |                                   ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: 1 positional argument in format string, but no arguments were given
[INFO] [stdout]  --> src/error.rs:9:43
[INFO] [stdout]   |
[INFO] [stdout] 9 |     #[error(display = "HTTP client error: {}")]
[INFO] [stdout]   |                                           ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: 1 positional argument in format string, but no arguments were given
[INFO] [stdout]   --> src/error.rs:11:52
[INFO] [stdout]    |
[INFO] [stdout] 11 |     #[error(display = "TOML deserialization error: {}")]
[INFO] [stdout]    |                                                    ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `lang-char-freq`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name lang_char_freq src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern bytes=/opt/rustwide/target/debug/deps/libbytes-060d9d2e342fea55.rmeta --extern err_derive=/opt/rustwide/target/debug/deps/liberr_derive-643792de63977bf3.so --extern flate2=/opt/rustwide/target/debug/deps/libflate2-130a725fbe2d011f.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-6eb313c07335ca99.rmeta --extern plotters=/opt/rustwide/target/debug/deps/libplotters-01c2ceecbb59966c.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-e1b76cb75a1ba3f3.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-04e1df4c4bc392cc.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-1e87cf88a100e85b.rmeta --extern tar=/opt/rustwide/target/debug/deps/libtar-486df893799b9ec8.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-e0ac7e39b6654bb3.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-6bc2f3632b439441.rmeta --extern tracing=/opt/rustwide/target/debug/deps/libtracing-4832fc089aa5702a.rmeta --extern tracing_subscriber=/opt/rustwide/target/debug/deps/libtracing_subscriber-fe7cecc7c17df782.rmeta --extern walkdir=/opt/rustwide/target/debug/deps/libwalkdir-35cbba2d5b8a0a7f.rmeta --extern zip=/opt/rustwide/target/debug/deps/libzip-53e8138fa2660929.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "89970d08ca233fff6d9ee7f501e3c05d53ef8f272d600b1fb077461015fc569f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89970d08ca233fff6d9ee7f501e3c05d53ef8f272d600b1fb077461015fc569f", kill_on_drop: false }`
[INFO] [stdout] 89970d08ca233fff6d9ee7f501e3c05d53ef8f272d600b1fb077461015fc569f
