[INFO] cloning repository https://github.com/Miniwoffer/mdbook-dot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Miniwoffer/mdbook-dot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMiniwoffer%2Fmdbook-dot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMiniwoffer%2Fmdbook-dot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5e7cf6e29993aa699ffcf60659acd6f62009f561
[INFO] testing Miniwoffer/mdbook-dot against beta-2020-10-09 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMiniwoffer%2Fmdbook-dot" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Miniwoffer/mdbook-dot 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/Miniwoffer/mdbook-dot
[INFO] finished tweaking git repo https://github.com/Miniwoffer/mdbook-dot
[INFO] tweaked toml for git repo https://github.com/Miniwoffer/mdbook-dot written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/Miniwoffer/mdbook-dot 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 walkdir v2.2.6
[INFO] [stderr]   Downloaded ws v0.7.9
[INFO] [stderr]   Downloaded syn v0.15.18
[INFO] [stderr]   Downloaded elasticlunr-rs v2.3.3
[INFO] [stderr]   Downloaded strum v0.9.0
[INFO] [stderr]   Downloaded strum_macros v0.9.1
[INFO] [stderr]   Downloaded error-chain v0.12.0
[INFO] [stderr]   Downloaded open v1.2.2
[INFO] [stderr]   Downloaded filetime v0.2.2
[INFO] [stderr]   Downloaded notify v4.0.6
[INFO] [stderr]   Downloaded ammonia v1.2.0
[INFO] [stderr]   Downloaded toml-query v0.7.0
[INFO] [stderr]   Downloaded markup5ever v0.7.3
[INFO] [stderr]   Downloaded mdbook v0.2.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] e3c2679e4b4068b1e044b63eec7d0cc37b723c8d4e8124d49b293d3ddc0d4959
[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" "e3c2679e4b4068b1e044b63eec7d0cc37b723c8d4e8124d49b293d3ddc0d4959", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3c2679e4b4068b1e044b63eec7d0cc37b723c8d4e8124d49b293d3ddc0d4959", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3c2679e4b4068b1e044b63eec7d0cc37b723c8d4e8124d49b293d3ddc0d4959", kill_on_drop: false }`
[INFO] [stdout] e3c2679e4b4068b1e044b63eec7d0cc37b723c8d4e8124d49b293d3ddc0d4959
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--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] 8e50f5ead661cd8036c9d6ca2739e16f2363b795b1b9d639b4c3c9c79e45df92
[INFO] running `Command { std: "docker" "start" "-a" "8e50f5ead661cd8036c9d6ca2739e16f2363b795b1b9d639b4c3c9c79e45df92", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling rand_core v0.3.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.20
[INFO] [stderr]    Compiling serde v1.0.80
[INFO] [stderr]    Compiling byteorder v1.2.7
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[INFO] [stderr]    Compiling unicode-normalization v0.1.7
[INFO] [stderr]    Compiling slab v0.4.1
[INFO] [stderr]    Compiling lazycell v1.2.0
[INFO] [stderr]    Compiling regex v1.0.6
[INFO] [stderr]    Compiling ucd-util v0.1.2
[INFO] [stderr]    Compiling cc v1.0.25
[INFO] [stderr]    Compiling ucd-trie v0.1.1
[INFO] [stderr]    Compiling maplit v1.0.1
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling utf-8 v0.7.4
[INFO] [stderr]    Compiling crossbeam-utils v0.5.0
[INFO] [stderr]    Compiling quick-error v1.2.2
[INFO] [stderr]    Compiling same-file v1.0.4
[INFO] [stderr]    Compiling rustc-demangle v0.1.9
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling sequence_trie v0.3.6
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]    Compiling termcolor v1.0.4
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[INFO] [stderr]    Compiling remove_dir_all v0.5.1
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[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling owning_ref v0.3.3
[INFO] [stderr]    Compiling tokio-executor v0.1.5
[INFO] [stderr]    Compiling getopts v0.2.18
[INFO] [stderr]    Compiling regex-syntax v0.6.2
[INFO] [stderr]    Compiling pest v2.0.2
[INFO] [stderr]    Compiling rand_core v0.2.2
[INFO] [stderr]    Compiling humantime v1.1.1
[INFO] [stderr]    Compiling walkdir v2.2.6
[INFO] [stderr]    Compiling base64 v0.9.3
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[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling time v0.1.40
[INFO] [stderr]    Compiling inotify-sys v0.1.3
[INFO] [stderr]    Compiling atty v0.2.11
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[INFO] [stderr]    Compiling rand v0.4.3
[INFO] [stderr]    Compiling itertools v0.7.8
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.1
[INFO] [stderr]    Compiling smallvec v0.6.5
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]    Compiling lock_api v0.1.4
[INFO] [stderr]    Compiling bytes v0.4.10
[INFO] [stderr]    Compiling clap v2.32.0
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling mio v0.6.16
[INFO] [stderr]    Compiling futf v0.1.4
[INFO] [stderr]    Compiling phf_shared v0.7.23
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[INFO] [stderr]    Compiling tokio-io v0.1.10
[INFO] [stderr]    Compiling pest_meta v2.0.3
[INFO] [stderr]    Compiling quote v0.6.9
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[INFO] [stderr]    Compiling tendril v0.4.0
[INFO] [stderr]    Compiling phf v0.7.23
[INFO] [stderr]    Compiling syn v0.15.18
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling aho-corasick v0.6.9
[INFO] [stderr]    Compiling phf_generator v0.7.23
[INFO] [stderr]    Compiling tempfile v3.0.4
[INFO] [stderr]    Compiling mio-extras v2.0.5
[INFO] [stderr]    Compiling phf_codegen v0.7.23
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling parking_lot v0.6.4
[INFO] [stderr]    Compiling mime_guess v1.8.6
[INFO] [stderr]    Compiling backtrace v0.3.9
[INFO] [stderr]    Compiling tokio-reactor v0.1.6
[INFO] [stderr]    Compiling error-chain v0.12.0
[INFO] [stderr]    Compiling pest_generator v2.0.0
[INFO] [stderr]    Compiling hyper v0.10.15
[INFO] [stderr]    Compiling ws v0.7.9
[INFO] [stderr]    Compiling inotify v0.6.1
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling notify v4.0.6
[INFO] [stderr]    Compiling pest_derive v2.0.1
[INFO] [stderr]    Compiling strum_macros v0.9.1
[INFO] [stderr]    Compiling serde_json v1.0.32
[INFO] [stderr]    Compiling toml v0.4.8
[INFO] [stderr]    Compiling iron v0.6.0
[INFO] [stderr]    Compiling mount v0.4.0
[INFO] [stderr]    Compiling staticfile v0.5.0
[INFO] [stderr]    Compiling handlebars v1.1.0
[INFO] [stderr]    Compiling toml-query v0.7.0
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling html5ever v0.22.5
[INFO] [stderr]    Compiling markup5ever v0.7.3
[INFO] [stderr]    Compiling elasticlunr-rs v2.3.3
[INFO] [stderr]    Compiling ammonia v1.2.0
[INFO] [stderr]    Compiling mdbook v0.2.3
[INFO] [stderr]    Compiling mdbook-dot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ArgMatches`
[INFO] [stdout]  --> src/bin/mdbook-dot.rs:6:22
[INFO] [stdout]   |
[INFO] [stdout] 6 | use clap::{App, Arg, ArgMatches, SubCommand};
[INFO] [stdout]   |                      ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]   --> src/bin/mdbook-dot.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::fs;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Chapter`
[INFO] [stdout]   --> src/bin/mdbook-dot.rs:14:34
[INFO] [stdout]    |
[INFO] [stdout] 14 | use mdbook::book::{Book,BookItem,Chapter};
[INFO] [stdout]    |                                  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sub_args`
[INFO] [stdout]   --> src/bin/mdbook-dot.rs:34:17
[INFO] [stdout]    |
[INFO] [stdout] 34 |     if let Some(sub_args) = matches.subcommand_matches("supports") {
[INFO] [stdout]    |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sub_args`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `front`
[INFO] [stdout]   --> src/bin/mdbook-dot.rs:81:34
[INFO] [stdout]    |
[INFO] [stdout] 81 | ...                   let (front,back) = chapter.content.split_at(start);
[INFO] [stdout]    |                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_front`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num_replaced_items`
[INFO] [stdout]   --> src/bin/mdbook-dot.rs:68:29
[INFO] [stdout]    |
[INFO] [stdout] 68 | fn process <'a,I>(items: I, num_replaced_items: &mut usize) -> Result<()>
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_replaced_items`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]    --> src/bin/mdbook-dot.rs:112:32
[INFO] [stdout]     |
[INFO] [stdout] 112 | fn dot_to_image(input : String,path : String) -> Result<String> {
[INFO] [stdout]     |                                ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `renderer`
[INFO] [stdout]   --> src/bin/mdbook-dot.rs:64:33
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn supports_renderer(&self, renderer: &str) -> bool {
[INFO] [stdout]    |                                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_renderer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/mdbook-dot.rs:118:13
[INFO] [stdout]     |
[INFO] [stdout] 118 |         let mut stdin = dot.stdin.as_mut().expect("Failed to open stdin");
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/bin/mdbook-dot.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     serde_json::to_writer(io::stdout(), &processed_book);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/bin/mdbook-dot.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |         process(&mut book.sections, &mut num_replaced_items);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 26s
[INFO] running `Command { std: "docker" "inspect" "8e50f5ead661cd8036c9d6ca2739e16f2363b795b1b9d639b4c3c9c79e45df92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e50f5ead661cd8036c9d6ca2739e16f2363b795b1b9d639b4c3c9c79e45df92", kill_on_drop: false }`
[INFO] [stdout] 8e50f5ead661cd8036c9d6ca2739e16f2363b795b1b9d639b4c3c9c79e45df92
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4c94faa2b006c9612ebe8569526153fd0b7941469f8b4fa26e6f57431ea762c8
[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" "4c94faa2b006c9612ebe8569526153fd0b7941469f8b4fa26e6f57431ea762c8", kill_on_drop: false }`
[INFO] [stderr]    Compiling mdbook-dot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ArgMatches`
[INFO] [stdout]  --> src/bin/mdbook-dot.rs:6:22
[INFO] [stdout]   |
[INFO] [stdout] 6 | use clap::{App, Arg, ArgMatches, SubCommand};
[INFO] [stdout]   |                      ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]   --> src/bin/mdbook-dot.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::fs;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Chapter`
[INFO] [stdout]   --> src/bin/mdbook-dot.rs:14:34
[INFO] [stdout]    |
[INFO] [stdout] 14 | use mdbook::book::{Book,BookItem,Chapter};
[INFO] [stdout]    |                                  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sub_args`
[INFO] [stdout]   --> src/bin/mdbook-dot.rs:34:17
[INFO] [stdout]    |
[INFO] [stdout] 34 |     if let Some(sub_args) = matches.subcommand_matches("supports") {
[INFO] [stdout]    |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sub_args`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `front`
[INFO] [stdout]   --> src/bin/mdbook-dot.rs:81:34
[INFO] [stdout]    |
[INFO] [stdout] 81 | ...                   let (front,back) = chapter.content.split_at(start);
[INFO] [stdout]    |                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_front`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num_replaced_items`
[INFO] [stdout]   --> src/bin/mdbook-dot.rs:68:29
[INFO] [stdout]    |
[INFO] [stdout] 68 | fn process <'a,I>(items: I, num_replaced_items: &mut usize) -> Result<()>
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_replaced_items`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]    --> src/bin/mdbook-dot.rs:112:32
[INFO] [stdout]     |
[INFO] [stdout] 112 | fn dot_to_image(input : String,path : String) -> Result<String> {
[INFO] [stdout]     |                                ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `renderer`
[INFO] [stdout]   --> src/bin/mdbook-dot.rs:64:33
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn supports_renderer(&self, renderer: &str) -> bool {
[INFO] [stdout]    |                                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_renderer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/mdbook-dot.rs:118:13
[INFO] [stdout]     |
[INFO] [stdout] 118 |         let mut stdin = dot.stdin.as_mut().expect("Failed to open stdin");
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/bin/mdbook-dot.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     serde_json::to_writer(io::stdout(), &processed_book);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/bin/mdbook-dot.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |         process(&mut book.sections, &mut num_replaced_items);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.46s
[INFO] running `Command { std: "docker" "inspect" "4c94faa2b006c9612ebe8569526153fd0b7941469f8b4fa26e6f57431ea762c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c94faa2b006c9612ebe8569526153fd0b7941469f8b4fa26e6f57431ea762c8", kill_on_drop: false }`
[INFO] [stdout] 4c94faa2b006c9612ebe8569526153fd0b7941469f8b4fa26e6f57431ea762c8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] cadce5b3e6f5c6c7fd54373e5e19e3346bc6a7623c091a02b381d438f543e7df
[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" "cadce5b3e6f5c6c7fd54373e5e19e3346bc6a7623c091a02b381d438f543e7df", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `ArgMatches`
[INFO] [stderr]  --> src/bin/mdbook-dot.rs:6:22
[INFO] [stderr]   |
[INFO] [stderr] 6 | use clap::{App, Arg, ArgMatches, SubCommand};
[INFO] [stderr]   |                      ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs`
[INFO] [stderr]   --> src/bin/mdbook-dot.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::fs;
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Chapter`
[INFO] [stderr]   --> src/bin/mdbook-dot.rs:14:34
[INFO] [stderr]    |
[INFO] [stderr] 14 | use mdbook::book::{Book,BookItem,Chapter};
[INFO] [stderr]    |                                  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sub_args`
[INFO] [stderr]   --> src/bin/mdbook-dot.rs:34:17
[INFO] [stderr]    |
[INFO] [stderr] 34 |     if let Some(sub_args) = matches.subcommand_matches("supports") {
[INFO] [stderr]    |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sub_args`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `front`
[INFO] [stderr]   --> src/bin/mdbook-dot.rs:81:34
[INFO] [stderr]    |
[INFO] [stderr] 81 | ...                   let (front,back) = chapter.content.split_at(start);
[INFO] [stderr]    |                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_front`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `num_replaced_items`
[INFO] [stderr]   --> src/bin/mdbook-dot.rs:68:29
[INFO] [stderr]    |
[INFO] [stderr] 68 | fn process <'a,I>(items: I, num_replaced_items: &mut usize) -> Result<()>
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_replaced_items`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `path`
[INFO] [stderr]    --> src/bin/mdbook-dot.rs:112:32
[INFO] [stderr]     |
[INFO] [stderr] 112 | fn dot_to_image(input : String,path : String) -> Result<String> {
[INFO] [stderr]     |                                ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `renderer`
[INFO] [stderr]   --> src/bin/mdbook-dot.rs:64:33
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn supports_renderer(&self, renderer: &str) -> bool {
[INFO] [stderr]    |                                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_renderer`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/bin/mdbook-dot.rs:118:13
[INFO] [stderr]     |
[INFO] [stderr] 118 |         let mut stdin = dot.stdin.as_mut().expect("Failed to open stdin");
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/bin/mdbook-dot.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     serde_json::to_writer(io::stdout(), &processed_book);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/bin/mdbook-dot.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |         process(&mut book.sections, &mut num_replaced_items);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 11 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.38s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/mdbook_dot-f98b4fbeeb13bf7b
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "cadce5b3e6f5c6c7fd54373e5e19e3346bc6a7623c091a02b381d438f543e7df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cadce5b3e6f5c6c7fd54373e5e19e3346bc6a7623c091a02b381d438f543e7df", kill_on_drop: false }`
[INFO] [stdout] cadce5b3e6f5c6c7fd54373e5e19e3346bc6a7623c091a02b381d438f543e7df
