[INFO] cloning repository https://github.com/Miniwoffer/mdbook-dot
[INFO] running `"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"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMiniwoffer%2Fmdbook-dot'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5e7cf6e29993aa699ffcf60659acd6f62009f561
[INFO] checking Miniwoffer/mdbook-dot against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMiniwoffer%2Fmdbook-dot" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Miniwoffer/mdbook-dot on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-12/source/Cargo.toml
[INFO] crate git repo https://github.com/Miniwoffer/mdbook-dot already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2ae02bdc9a89228a391967273056291860a7fd9319d56eb6af90613e70456db5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "2ae02bdc9a89228a391967273056291860a7fd9319d56eb6af90613e70456db5"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking is-match v0.1.0
[INFO] [stderr]     Checking strum v0.9.0
[INFO] [stderr]     Checking open v1.2.2
[INFO] [stderr]     Checking inotify-sys v0.1.3
[INFO] [stderr]     Checking filetime v0.2.2
[INFO] [stderr]    Compiling pest v2.0.2
[INFO] [stderr]     Checking walkdir v2.2.6
[INFO] [stderr]     Checking pulldown-cmark v0.1.2
[INFO] [stderr]    Compiling serde_json v1.0.32
[INFO] [stderr]     Checking tempfile v3.0.4
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]    Compiling syn v0.15.18
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking tendril v0.4.0
[INFO] [stderr]     Checking regex v1.0.6
[INFO] [stderr]     Checking error-chain v0.12.0
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]     Checking inotify v0.6.1
[INFO] [stderr]     Checking iron v0.6.0
[INFO] [stderr]     Checking ws v0.7.9
[INFO] [stderr]     Checking mount v0.4.0
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling pest_meta v2.0.3
[INFO] [stderr]     Checking notify v4.0.6
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking toml-query v0.7.0
[INFO] [stderr]     Checking staticfile v0.5.0
[INFO] [stderr]    Compiling pest_generator v2.0.0
[INFO] [stderr]    Compiling strum_macros v0.9.1
[INFO] [stderr]    Compiling pest_derive v2.0.1
[INFO] [stderr]     Checking handlebars v1.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling html5ever v0.22.5
[INFO] [stderr]    Compiling markup5ever v0.7.3
[INFO] [stderr]     Checking elasticlunr-rs v2.3.3
[INFO] [stderr]     Checking ammonia v1.2.0
[INFO] [stderr]     Checking mdbook v0.2.3
[INFO] [stderr]     Checking mdbook-dot v0.1.0 (/opt/rustwide/workdir)
[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: consider prefixing 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: consider prefixing 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: consider prefixing 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: consider prefixing 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: consider prefixing 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: 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: consider prefixing 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: consider prefixing 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: consider prefixing 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: consider prefixing 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: consider prefixing 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]     Finished dev [unoptimized + debuginfo] target(s) in 1m 51s
[INFO] running `"docker" "inspect" "2ae02bdc9a89228a391967273056291860a7fd9319d56eb6af90613e70456db5"`
[INFO] running `"docker" "rm" "-f" "2ae02bdc9a89228a391967273056291860a7fd9319d56eb6af90613e70456db5"`
[INFO] [stdout] 2ae02bdc9a89228a391967273056291860a7fd9319d56eb6af90613e70456db5