[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 beta-2020-10-09 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-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cassaundra/lang-char-freq on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "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-12/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" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-subscriber v0.2.4
[INFO] [stderr]   Downloaded euclid v0.20.8
[INFO] [stderr]   Downloaded zip v0.5.5
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4f0a56bb544c0daa4c1d8adfe648a2e73ab0c4884a23e860cd77550e3aef887c
[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" "4f0a56bb544c0daa4c1d8adfe648a2e73ab0c4884a23e860cd77550e3aef887c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f0a56bb544c0daa4c1d8adfe648a2e73ab0c4884a23e860cd77550e3aef887c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f0a56bb544c0daa4c1d8adfe648a2e73ab0c4884a23e860cd77550e3aef887c", kill_on_drop: false }`
[INFO] [stdout] 4f0a56bb544c0daa4c1d8adfe648a2e73ab0c4884a23e860cd77550e3aef887c
[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" "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-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 36b34e7a95dfb69d8ab1dbec18465dbc2700361467e4d51a0459e04b588bdab3
[INFO] running `Command { std: "docker" "start" "-a" "36b34e7a95dfb69d8ab1dbec18465dbc2700361467e4d51a0459e04b588bdab3", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling syn v1.0.17
[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]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling rustversion v1.0.3
[INFO] [stderr]    Compiling ryu v1.0.3
[INFO] [stderr]    Compiling palette v0.5.0
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking float-ord v0.2.0
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]     Checking podio v0.1.6
[INFO] [stderr]    Compiling cmake v0.1.42
[INFO] [stderr]    Compiling openssl-sys v0.9.55
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling servo-fontconfig-sys v4.0.9
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling bzip2-sys v0.1.8+1.0.8
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]     Checking futures-channel v0.3.4
[INFO] [stderr]     Checking http v0.2.1
[INFO] [stderr]     Checking tracing-core v0.1.10
[INFO] [stderr]     Checking sharded-slab v0.0.8
[INFO] [stderr]     Checking gif v0.10.3
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]     Checking stb_truetype v0.3.1
[INFO] [stderr]     Checking jpeg-decoder v0.1.18
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]    Compiling servo-freetype-sys v4.0.5
[INFO] [stderr]    Compiling expat-sys v2.1.6
[INFO] [stderr]     Checking euclid v0.20.8
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking regex v1.3.6
[INFO] [stderr]     Checking tracing-log v0.1.1
[INFO] [stderr]     Checking png v0.15.3
[INFO] [stderr]     Checking rusttype v0.8.2
[INFO] [stderr]    Compiling openssl v0.10.29
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking matchers v0.0.1
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[INFO] [stderr]     Checking lyon_geom v0.14.1
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[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking image v0.22.5
[INFO] [stderr]     Checking tar v0.4.26
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking zip v0.5.5
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]     Checking lyon_path v0.14.0
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking font-kit v0.4.0
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling serde_derive v1.0.105
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling pin-project-internal v0.4.8
[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 futures-executor v0.3.4
[INFO] [stderr]     Checking plotters v0.2.12
[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 reqwest v0.10.4
[INFO] [stderr]     Checking tracing-subscriber v0.2.4
[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-c5714e68d7e46dbf.rmeta --extern err_derive=/opt/rustwide/target/debug/deps/liberr_derive-fcba8bc55c181da9.so --extern flate2=/opt/rustwide/target/debug/deps/libflate2-961b9de708066c0a.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-90446a52eb0cadaf.rmeta --extern plotters=/opt/rustwide/target/debug/deps/libplotters-a89487ada23ac24e.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-c3089945afab9a73.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-4c69d0af5b2e13f4.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-7ffb0007db60ff57.rmeta --extern tar=/opt/rustwide/target/debug/deps/libtar-e00b61ab48719a48.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-ca8b086c62c58985.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-051325d37f9a8531.rmeta --extern tracing=/opt/rustwide/target/debug/deps/libtracing-3a2d85cd80de9814.rmeta --extern tracing_subscriber=/opt/rustwide/target/debug/deps/libtracing_subscriber-3427541d4478ad00.rmeta --extern walkdir=/opt/rustwide/target/debug/deps/libwalkdir-37c1eba6428ea4cb.rmeta --extern zip=/opt/rustwide/target/debug/deps/libzip-f2c68e066eba3f00.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "36b34e7a95dfb69d8ab1dbec18465dbc2700361467e4d51a0459e04b588bdab3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36b34e7a95dfb69d8ab1dbec18465dbc2700361467e4d51a0459e04b588bdab3", kill_on_drop: false }`
[INFO] [stdout] 36b34e7a95dfb69d8ab1dbec18465dbc2700361467e4d51a0459e04b588bdab3
