[INFO] updating cached repository purpleprotocol/graphlib
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/purpleprotocol/graphlib
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/purpleprotocol/graphlib" "work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/purpleprotocol/graphlib"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/purpleprotocol/graphlib'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/purpleprotocol/graphlib" "work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/purpleprotocol/graphlib"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/purpleprotocol/graphlib'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4ceb9be8651f1c1935817d7c31cf46e7e7833c28
[INFO] sha for GitHub repo purpleprotocol/graphlib: 4ceb9be8651f1c1935817d7c31cf46e7e7833c28
[INFO] validating manifest of purpleprotocol/graphlib on toolchain master#a850a426491e14186af2250549bf41256b5938d2
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of purpleprotocol/graphlib on toolchain try#06a150c7d11500b41499224f165e9de1de096768
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing purpleprotocol/graphlib
[INFO] finished frobbing purpleprotocol/graphlib
[INFO] frobbed toml for purpleprotocol/graphlib written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/purpleprotocol/graphlib/Cargo.toml
[INFO] started frobbing purpleprotocol/graphlib
[INFO] finished frobbing purpleprotocol/graphlib
[INFO] frobbed toml for purpleprotocol/graphlib written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/purpleprotocol/graphlib/Cargo.toml
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on the registry index
[INFO] checking purpleprotocol/graphlib against master#a850a426491e14186af2250549bf41256b5938d2 for pr-60162
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60162/worker-3/master#a850a426491e14186af2250549bf41256b5938d2:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/purpleprotocol/graphlib:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+a850a426491e14186af2250549bf41256b5938d2-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a752c749a22bd9f6601697a1dfb9d31b5455002190998c0fef1b59d11f2e515e
[INFO] running `"docker" "start" "-a" "a752c749a22bd9f6601697a1dfb9d31b5455002190998c0fef1b59d11f2e515e"`
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]     Checking memchr v2.2.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rand_xoshiro v0.1.0
[INFO] [stderr]     Checking tinytemplate v1.0.1
[INFO] [stderr]     Checking hashbrown v0.1.8
[INFO] [stderr]     Checking csv-core v0.1.5
[INFO] [stderr]     Checking csv v1.0.7
[INFO] [stderr]     Checking graphlib v0.2.3 (/opt/crater/workdir)
[INFO] [stderr]     Checking criterion-plot v0.3.1
[INFO] [stderr] warning: value assigned to `next_ptr` is never read
[INFO] [stderr]   --> src/iterators/bfs.rs:55:21
[INFO] [stderr]    |
[INFO] [stderr] 55 |             let mut next_ptr = None;
[INFO] [stderr]    |                     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `edges_hm_ref`
[INFO] [stderr]     --> src/graph.rs:1096:5
[INFO] [stderr]      |
[INFO] [stderr] 1096 |     fn edges_hm_ref(&self) -> Result<(&HashMap<Edge, f32>), GraphErr> {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `vertex_hm_ref`
[INFO] [stderr]     --> src/graph.rs:1101:5
[INFO] [stderr]      |
[INFO] [stderr] 1101 |     fn vertex_hm_ref(&self) -> &HashMap<Arc<VertexId>, (T, Arc<VertexId>)> {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Checking criterion v0.2.11
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]  --> examples/dot.rs:6:13
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut f = File::create("example1.dot").unwrap();
[INFO] [stderr]   |             ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> examples/dot.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut f = File::create("example1.dot").unwrap();
[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: value assigned to `next_ptr` is never read
[INFO] [stderr]   --> src/iterators/bfs.rs:55:21
[INFO] [stderr]    |
[INFO] [stderr] 55 |             let mut next_ptr = None;
[INFO] [stderr]    |                     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `edges_hm_ref`
[INFO] [stderr]     --> src/graph.rs:1096:5
[INFO] [stderr]      |
[INFO] [stderr] 1096 |     fn edges_hm_ref(&self) -> Result<(&HashMap<Edge, f32>), GraphErr> {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `vertex_hm_ref`
[INFO] [stderr]     --> src/graph.rs:1101:5
[INFO] [stderr]      |
[INFO] [stderr] 1101 |     fn vertex_hm_ref(&self) -> &HashMap<Arc<VertexId>, (T, Arc<VertexId>)> {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/iterators/dfs.rs:176:9
[INFO] [stderr]     |
[INFO] [stderr] 176 |         graph.add_edge(&v1, &v2);
[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/iterators/dfs.rs:177:9
[INFO] [stderr]     |
[INFO] [stderr] 177 |         graph.add_edge(&v3, &v2);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> benches/benchmark.rs:1136:13
[INFO] [stderr]      |
[INFO] [stderr] 1136 |         let mut id = graph.add_vertex(10);
[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: variable does not need to be mutable
[INFO] [stderr]     --> benches/benchmark.rs:1147:13
[INFO] [stderr]      |
[INFO] [stderr] 1147 |         let mut id = graph.add_vertex(100);
[INFO] [stderr]      |             ----^^
[INFO] [stderr]      |             |
[INFO] [stderr]      |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> benches/benchmark.rs:1158:13
[INFO] [stderr]      |
[INFO] [stderr] 1158 |         let mut id = graph.add_vertex(500);
[INFO] [stderr]      |             ----^^
[INFO] [stderr]      |             |
[INFO] [stderr]      |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> benches/benchmark.rs:1169:13
[INFO] [stderr]      |
[INFO] [stderr] 1169 |         let mut id = graph.add_vertex(1000);
[INFO] [stderr]      |             ----^^
[INFO] [stderr]      |             |
[INFO] [stderr]      |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> benches/benchmark.rs:1192:13
[INFO] [stderr]      |
[INFO] [stderr] 1192 |         let mut id = graph.add_vertex(10);
[INFO] [stderr]      |             ----^^
[INFO] [stderr]      |             |
[INFO] [stderr]      |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> benches/benchmark.rs:1202:13
[INFO] [stderr]      |
[INFO] [stderr] 1202 |         let mut id = graph.add_vertex(100);
[INFO] [stderr]      |             ----^^
[INFO] [stderr]      |             |
[INFO] [stderr]      |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> benches/benchmark.rs:1212:13
[INFO] [stderr]      |
[INFO] [stderr] 1212 |         let mut id = graph.add_vertex(500);
[INFO] [stderr]      |             ----^^
[INFO] [stderr]      |             |
[INFO] [stderr]      |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> benches/benchmark.rs:1222:13
[INFO] [stderr]      |
[INFO] [stderr] 1222 |         let mut id = graph.add_vertex(1000);
[INFO] [stderr]      |             ----^^
[INFO] [stderr]      |             |
[INFO] [stderr]      |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> benches/benchmark.rs:47:13
[INFO] [stderr]    |
[INFO] [stderr] 47 |             graph.add_edge(&v1, &v2);
[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]   --> benches/benchmark.rs:65:13
[INFO] [stderr]    |
[INFO] [stderr] 65 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[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]   --> benches/benchmark.rs:84:13
[INFO] [stderr]    |
[INFO] [stderr] 84 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[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]    --> benches/benchmark.rs:103:13
[INFO] [stderr]     |
[INFO] [stderr] 103 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:141:13
[INFO] [stderr]     |
[INFO] [stderr] 141 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:160:13
[INFO] [stderr]     |
[INFO] [stderr] 160 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:179:13
[INFO] [stderr]     |
[INFO] [stderr] 179 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:198:13
[INFO] [stderr]     |
[INFO] [stderr] 198 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:311:13
[INFO] [stderr]     |
[INFO] [stderr] 311 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:330:13
[INFO] [stderr]     |
[INFO] [stderr] 330 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:349:13
[INFO] [stderr]     |
[INFO] [stderr] 349 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:368:13
[INFO] [stderr]     |
[INFO] [stderr] 368 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:414:13
[INFO] [stderr]     |
[INFO] [stderr] 414 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:430:13
[INFO] [stderr]     |
[INFO] [stderr] 430 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:446:13
[INFO] [stderr]     |
[INFO] [stderr] 446 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:462:13
[INFO] [stderr]     |
[INFO] [stderr] 462 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:495:13
[INFO] [stderr]     |
[INFO] [stderr] 495 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:510:13
[INFO] [stderr]     |
[INFO] [stderr] 510 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:525:13
[INFO] [stderr]     |
[INFO] [stderr] 525 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:540:13
[INFO] [stderr]     |
[INFO] [stderr] 540 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:570:13
[INFO] [stderr]     |
[INFO] [stderr] 570 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:584:13
[INFO] [stderr]     |
[INFO] [stderr] 584 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:598:13
[INFO] [stderr]     |
[INFO] [stderr] 598 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:612:13
[INFO] [stderr]     |
[INFO] [stderr] 612 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:642:13
[INFO] [stderr]     |
[INFO] [stderr] 642 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:659:13
[INFO] [stderr]     |
[INFO] [stderr] 659 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:676:13
[INFO] [stderr]     |
[INFO] [stderr] 676 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:693:13
[INFO] [stderr]     |
[INFO] [stderr] 693 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:728:13
[INFO] [stderr]     |
[INFO] [stderr] 728 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:746:13
[INFO] [stderr]     |
[INFO] [stderr] 746 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:763:13
[INFO] [stderr]     |
[INFO] [stderr] 763 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:780:13
[INFO] [stderr]     |
[INFO] [stderr] 780 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:815:13
[INFO] [stderr]     |
[INFO] [stderr] 815 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:833:13
[INFO] [stderr]     |
[INFO] [stderr] 833 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:852:13
[INFO] [stderr]     |
[INFO] [stderr] 852 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:870:13
[INFO] [stderr]     |
[INFO] [stderr] 870 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:926:17
[INFO] [stderr]     |
[INFO] [stderr] 926 |                 graph.add_edge(&v1, &v2);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:939:17
[INFO] [stderr]     |
[INFO] [stderr] 939 |                 graph.add_edge(&v1, &v2);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:951:17
[INFO] [stderr]     |
[INFO] [stderr] 951 |                 graph.add_edge(&v1, &v2);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]    --> benches/benchmark.rs:963:17
[INFO] [stderr]     |
[INFO] [stderr] 963 |                 graph.add_edge(&v1, &v2);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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]     --> benches/benchmark.rs:1065:13
[INFO] [stderr]      |
[INFO] [stderr] 1065 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1079:13
[INFO] [stderr]      |
[INFO] [stderr] 1079 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1094:13
[INFO] [stderr]      |
[INFO] [stderr] 1094 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1108:13
[INFO] [stderr]      |
[INFO] [stderr] 1108 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1389:9
[INFO] [stderr]      |
[INFO] [stderr] 1389 |         graph.add_edge(&v0, &v1);
[INFO] [stderr]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1390:9
[INFO] [stderr]      |
[INFO] [stderr] 1390 |         graph.add_edge(&v1, &v2);
[INFO] [stderr]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1394:13
[INFO] [stderr]      |
[INFO] [stderr] 1394 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1396:9
[INFO] [stderr]      |
[INFO] [stderr] 1396 |         graph.add_edge(&v2, &v0);
[INFO] [stderr]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1407:9
[INFO] [stderr]      |
[INFO] [stderr] 1407 |         graph.add_edge(&v0, &v1);
[INFO] [stderr]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1408:9
[INFO] [stderr]      |
[INFO] [stderr] 1408 |         graph.add_edge(&v1, &v2);
[INFO] [stderr]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1412:13
[INFO] [stderr]      |
[INFO] [stderr] 1412 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1414:9
[INFO] [stderr]      |
[INFO] [stderr] 1414 |         graph.add_edge(&v2, &v0);
[INFO] [stderr]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1425:9
[INFO] [stderr]      |
[INFO] [stderr] 1425 |         graph.add_edge(&v0, &v1);
[INFO] [stderr]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1426:9
[INFO] [stderr]      |
[INFO] [stderr] 1426 |         graph.add_edge(&v1, &v2);
[INFO] [stderr]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1430:13
[INFO] [stderr]      |
[INFO] [stderr] 1430 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1432:9
[INFO] [stderr]      |
[INFO] [stderr] 1432 |         graph.add_edge(&v2, &v0);
[INFO] [stderr]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1443:9
[INFO] [stderr]      |
[INFO] [stderr] 1443 |         graph.add_edge(&v0, &v1);
[INFO] [stderr]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1444:9
[INFO] [stderr]      |
[INFO] [stderr] 1444 |         graph.add_edge(&v1, &v2);
[INFO] [stderr]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1448:13
[INFO] [stderr]      |
[INFO] [stderr] 1448 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1450:9
[INFO] [stderr]      |
[INFO] [stderr] 1450 |         graph.add_edge(&v2, &v0);
[INFO] [stderr]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1527:17
[INFO] [stderr]      |
[INFO] [stderr] 1527 |                 graph.add_edge(&v1, &v2);
[INFO] [stderr]      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1540:17
[INFO] [stderr]      |
[INFO] [stderr] 1540 |                 graph.add_edge(&v1, &v2);
[INFO] [stderr]      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1554:17
[INFO] [stderr]      |
[INFO] [stderr] 1554 |                 graph.add_edge(&v1, &v2);
[INFO] [stderr]      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1568:17
[INFO] [stderr]      |
[INFO] [stderr] 1568 |                 graph.add_edge(&v1, &v2);
[INFO] [stderr]      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1702:13
[INFO] [stderr]      |
[INFO] [stderr] 1702 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1715:13
[INFO] [stderr]      |
[INFO] [stderr] 1715 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1728:13
[INFO] [stderr]      |
[INFO] [stderr] 1728 |             graph.add_edge(&v1, &v2);
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[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]     --> benches/benchmark.rs:1741:13
[INFO] [stderr]      |
[INFO] [stderr] 1741 |             graph.add_edge(&v1, &v2);
[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 12.29s
[INFO] running `"docker" "inspect" "a752c749a22bd9f6601697a1dfb9d31b5455002190998c0fef1b59d11f2e515e"`
[INFO] running `"docker" "rm" "-f" "a752c749a22bd9f6601697a1dfb9d31b5455002190998c0fef1b59d11f2e515e"`
[INFO] [stdout] a752c749a22bd9f6601697a1dfb9d31b5455002190998c0fef1b59d11f2e515e