[INFO] cloning repository Miniwoffer/mdbook-dot
[INFO] running `"git" "clone" "--bare" "git://github.com/Miniwoffer/mdbook-dot.git" "work/cache/sources/gh/Miniwoffer/mdbook-dot"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/Miniwoffer/mdbook-dot'...
[INFO] running `"git" "clone" "work/cache/sources/gh/Miniwoffer/mdbook-dot" "work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/Miniwoffer/mdbook-dot"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/Miniwoffer/mdbook-dot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Miniwoffer/mdbook-dot" "work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/Miniwoffer/mdbook-dot"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/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 master#c8865d8e195813ade6b84434ac9f8850e7112d1a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Miniwoffer/mdbook-dot on toolchain try#e212b7d492c96d3837691ba29d32d5f468933fb8
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "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/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/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/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] testing Miniwoffer/mdbook-dot against try#e212b7d492c96d3837691ba29d32d5f468933fb8 for pr-61629
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-1/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/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=forbid" "-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" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "build" "--frozen"`
[INFO] [stdout] 7e945c6bd7248944fcefd57dca05c4db94b3f9851fa97d86f807b3a699eea6a5
[INFO] running `"docker" "start" "-a" "7e945c6bd7248944fcefd57dca05c4db94b3f9851fa97d86f807b3a699eea6a5"`
[INFO] [stderr]    Compiling strum v0.9.0
[INFO] [stderr]    Compiling filetime v0.2.2
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]    Compiling tempfile v3.0.4
[INFO] [stderr]    Compiling mio-extras v2.0.5
[INFO] [stderr]    Compiling syn v0.15.18
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling regex v1.0.6
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling tokio-reactor v0.1.6
[INFO] [stderr]    Compiling ws v0.7.9
[INFO] [stderr]    Compiling mount v0.4.0
[INFO] [stderr]    Compiling staticfile v0.5.0
[INFO] [stderr]    Compiling inotify v0.6.1
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling notify v4.0.6
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling toml-query v0.7.0
[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]    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 51s
[INFO] running `"docker" "inspect" "7e945c6bd7248944fcefd57dca05c4db94b3f9851fa97d86f807b3a699eea6a5"`
[INFO] running `"docker" "rm" "-f" "7e945c6bd7248944fcefd57dca05c4db94b3f9851fa97d86f807b3a699eea6a5"`
[INFO] [stdout] 7e945c6bd7248944fcefd57dca05c4db94b3f9851fa97d86f807b3a699eea6a5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-1/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/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=forbid" "-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" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] fc5b998b3db7076506b3d0c6cee48ee7a903ecf08633071f739b5d2867c02f98
[INFO] running `"docker" "start" "-a" "fc5b998b3db7076506b3d0c6cee48ee7a903ecf08633071f739b5d2867c02f98"`
[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 2.33s
[INFO] running `"docker" "inspect" "fc5b998b3db7076506b3d0c6cee48ee7a903ecf08633071f739b5d2867c02f98"`
[INFO] running `"docker" "rm" "-f" "fc5b998b3db7076506b3d0c6cee48ee7a903ecf08633071f739b5d2867c02f98"`
[INFO] [stdout] fc5b998b3db7076506b3d0c6cee48ee7a903ecf08633071f739b5d2867c02f98
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-1/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/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=forbid" "-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" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "test" "--frozen"`
[INFO] [stdout] bb6ead9d4f8de61f70fb61bc8dec38c847c0c3b42b7a1b705a406ebfdd2d9d14
[INFO] running `"docker" "start" "-a" "bb6ead9d4f8de61f70fb61bc8dec38c847c0c3b42b7a1b705a406ebfdd2d9d14"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.23s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mdbook_dot-3ebf92be573fcd11
[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" "bb6ead9d4f8de61f70fb61bc8dec38c847c0c3b42b7a1b705a406ebfdd2d9d14"`
[INFO] running `"docker" "rm" "-f" "bb6ead9d4f8de61f70fb61bc8dec38c847c0c3b42b7a1b705a406ebfdd2d9d14"`
[INFO] [stdout] bb6ead9d4f8de61f70fb61bc8dec38c847c0c3b42b7a1b705a406ebfdd2d9d14