[INFO] updating cached repository Miniwoffer/mdbook-dot
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Miniwoffer/mdbook-dot
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Miniwoffer/mdbook-dot" "work/ex/beta-1.38-1/sources/1.37.0/gh/Miniwoffer/mdbook-dot"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Miniwoffer/mdbook-dot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Miniwoffer/mdbook-dot" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Miniwoffer/mdbook-dot"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Miniwoffer/mdbook-dot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5e7cf6e29993aa699ffcf60659acd6f62009f561
[INFO] sha for GitHub repo Miniwoffer/mdbook-dot: 5e7cf6e29993aa699ffcf60659acd6f62009f561
[INFO] validating manifest of Miniwoffer/mdbook-dot on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Miniwoffer/mdbook-dot on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Miniwoffer/mdbook-dot
[INFO] finished frobbing Miniwoffer/mdbook-dot
[INFO] frobbed toml for Miniwoffer/mdbook-dot written to work/ex/beta-1.38-1/sources/1.37.0/gh/Miniwoffer/mdbook-dot/Cargo.toml
[INFO] started frobbing Miniwoffer/mdbook-dot
[INFO] finished frobbing Miniwoffer/mdbook-dot
[INFO] frobbed toml for Miniwoffer/mdbook-dot written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Miniwoffer/mdbook-dot/Cargo.toml
[INFO] crate Miniwoffer/mdbook-dot already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Miniwoffer/mdbook-dot against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Miniwoffer/mdbook-dot:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 0560424f453887fb4910a504e594590a124591424c20f3c54b6e78e63eb01669
[INFO] running `"docker" "start" "-a" "0560424f453887fb4910a504e594590a124591424c20f3c54b6e78e63eb01669"`
[INFO] [stderr]    Compiling strum v0.9.0
[INFO] [stderr]    Compiling is-match v0.1.0
[INFO] [stderr]    Compiling open v1.2.2
[INFO] [stderr]    Compiling filetime v0.2.2
[INFO] [stderr]    Compiling tokio-io v0.1.10
[INFO] [stderr]    Compiling syn v0.15.18
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling tendril v0.4.0
[INFO] [stderr]    Compiling ws v0.7.9
[INFO] [stderr]    Compiling regex v1.0.6
[INFO] [stderr]    Compiling error-chain v0.12.0
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling tokio-reactor v0.1.6
[INFO] [stderr]    Compiling mime_guess v1.8.6
[INFO] [stderr]    Compiling inotify v0.6.1
[INFO] [stderr]    Compiling iron v0.6.0
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling toml-query v0.7.0
[INFO] [stderr]    Compiling notify v4.0.6
[INFO] [stderr]    Compiling mount v0.4.0
[INFO] [stderr]    Compiling pest_generator v2.0.0
[INFO] [stderr]    Compiling staticfile v0.5.0
[INFO] [stderr]    Compiling strum_macros v0.9.1
[INFO] [stderr]    Compiling pest_derive v2.0.1
[INFO] [stderr]    Compiling 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]    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/crater/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]     Finished dev [unoptimized + debuginfo] target(s) in 1m 30s
[INFO] running `"docker" "inspect" "0560424f453887fb4910a504e594590a124591424c20f3c54b6e78e63eb01669"`
[INFO] running `"docker" "rm" "-f" "0560424f453887fb4910a504e594590a124591424c20f3c54b6e78e63eb01669"`
[INFO] [stdout] 0560424f453887fb4910a504e594590a124591424c20f3c54b6e78e63eb01669
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Miniwoffer/mdbook-dot:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] e440f5e8787241d014786d40627c7e5529be0b0b89a39b070406a8cee086d370
[INFO] running `"docker" "start" "-a" "e440f5e8787241d014786d40627c7e5529be0b0b89a39b070406a8cee086d370"`
[INFO] [stderr]    Compiling mdbook-dot v0.1.0 (/opt/crater/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]     Finished dev [unoptimized + debuginfo] target(s) in 1.93s
[INFO] running `"docker" "inspect" "e440f5e8787241d014786d40627c7e5529be0b0b89a39b070406a8cee086d370"`
[INFO] running `"docker" "rm" "-f" "e440f5e8787241d014786d40627c7e5529be0b0b89a39b070406a8cee086d370"`
[INFO] [stdout] e440f5e8787241d014786d40627c7e5529be0b0b89a39b070406a8cee086d370
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Miniwoffer/mdbook-dot:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 283cfee5c3b2cb9b9748e5e418711abcf64efec76d46c3fbe1c7008ed8aa4a19
[INFO] running `"docker" "start" "-a" "283cfee5c3b2cb9b9748e5e418711abcf64efec76d46c3fbe1c7008ed8aa4a19"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mdbook_dot-ba1ed14338be35f2
[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 `"docker" "inspect" "283cfee5c3b2cb9b9748e5e418711abcf64efec76d46c3fbe1c7008ed8aa4a19"`
[INFO] running `"docker" "rm" "-f" "283cfee5c3b2cb9b9748e5e418711abcf64efec76d46c3fbe1c7008ed8aa4a19"`
[INFO] [stdout] 283cfee5c3b2cb9b9748e5e418711abcf64efec76d46c3fbe1c7008ed8aa4a19