[INFO] crate graphlib 0.4.0 is already in cache
[INFO] testing graphlib-0.4.0 against 1.38.0 for beta-1.39-1
[INFO] extracting crate graphlib 0.4.0 into work/builds/worker-7/source
[INFO] validating manifest of crates.io crate graphlib 0.4.0 on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate graphlib 0.4.0
[INFO] finished tweaking crates.io crate graphlib 0.4.0
[INFO] tweaked toml for crates.io crate graphlib 0.4.0 written to work/builds/worker-7/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 51f1550a47ee8243115397831a1e8df3e10549d38289ad28ea8a4631513393a8
[INFO] running `"docker" "start" "-a" "51f1550a47ee8243115397831a1e8df3e10549d38289ad28ea8a4631513393a8"`
[INFO] [stderr]    Compiling hashbrown v0.1.8
[INFO] [stderr]    Compiling graphlib v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: value assigned to `next_ptr` is never read
[INFO] [stderr]   --> src/iterators/bfs.rs:53:21
[INFO] [stderr]    |
[INFO] [stderr] 53 |             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: `matches`
[INFO] [stderr]   --> src/edge.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub(crate) fn matches(&self, a: &VertexId, b: &VertexId) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `matches_any`
[INFO] [stderr]   --> src/edge.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub(crate) fn matches_any(&self, id: &VertexId) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `edges_hm_ref`
[INFO] [stderr]     --> src/graph.rs:1231:5
[INFO] [stderr]      |
[INFO] [stderr] 1231 |     fn edges_hm_ref(&self) -> Result<(&HashMap<Edge, f32>), GraphErr> {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `vertex_hm_ref`
[INFO] [stderr]     --> src/graph.rs:1236:5
[INFO] [stderr]      |
[INFO] [stderr] 1236 |     fn vertex_hm_ref(&self) -> &HashMap<VertexId, (T, VertexId)> {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.53s
[INFO] running `"docker" "inspect" "51f1550a47ee8243115397831a1e8df3e10549d38289ad28ea8a4631513393a8"`
[INFO] running `"docker" "rm" "-f" "51f1550a47ee8243115397831a1e8df3e10549d38289ad28ea8a4631513393a8"`
[INFO] [stdout] 51f1550a47ee8243115397831a1e8df3e10549d38289ad28ea8a4631513393a8
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 637ae9bd1ba76a15cd1580ba459430a891aa0bc6627f5a00a7894617f04cca57
[INFO] running `"docker" "start" "-a" "637ae9bd1ba76a15cd1580ba459430a891aa0bc6627f5a00a7894617f04cca57"`
[INFO] [stderr]    Compiling graphlib v0.4.0 (/opt/rustwide/workdir)
[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:53:21
[INFO] [stderr]    |
[INFO] [stderr] 53 |             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: `matches`
[INFO] [stderr]   --> src/edge.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub(crate) fn matches(&self, a: &VertexId, b: &VertexId) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `matches_any`
[INFO] [stderr]   --> src/edge.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub(crate) fn matches_any(&self, id: &VertexId) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `edges_hm_ref`
[INFO] [stderr]     --> src/graph.rs:1231:5
[INFO] [stderr]      |
[INFO] [stderr] 1231 |     fn edges_hm_ref(&self) -> Result<(&HashMap<Edge, f32>), GraphErr> {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `vertex_hm_ref`
[INFO] [stderr]     --> src/graph.rs:1236:5
[INFO] [stderr]      |
[INFO] [stderr] 1236 |     fn vertex_hm_ref(&self) -> &HashMap<VertexId, (T, 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]     Finished dev [unoptimized + debuginfo] target(s) in 1.81s
[INFO] running `"docker" "inspect" "637ae9bd1ba76a15cd1580ba459430a891aa0bc6627f5a00a7894617f04cca57"`
[INFO] running `"docker" "rm" "-f" "637ae9bd1ba76a15cd1580ba459430a891aa0bc6627f5a00a7894617f04cca57"`
[INFO] [stdout] 637ae9bd1ba76a15cd1580ba459430a891aa0bc6627f5a00a7894617f04cca57
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen"`
[INFO] [stdout] e21348d8229679527ee6b7f169dcc06e2b5b1d0afd52b50f2c174f804befdfeb
[INFO] running `"docker" "start" "-a" "e21348d8229679527ee6b7f169dcc06e2b5b1d0afd52b50f2c174f804befdfeb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/graphlib-ccf8dc647e8a6792
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test iterators::dfs::tests::not_cyclic ... ok
[INFO] [stdout] test graph::tests::dfs ... ok
[INFO] [stdout] test iterators::topo::tests::is_cyclic ... ok
[INFO] [stdout] test graph::tests::dfs_mul_roots ... ok
[INFO] [stdout] test iterators::topo::tests::is_not_cyclic ... ok
[INFO] [stdout] test iterators::topo::tests::is_cyclic_and_panic ... ok
[INFO] [stdout] test iterators::dfs::tests::is_cyclic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests graphlib
[INFO] [stdout] 
[INFO] [stdout] running 35 tests
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::capacity (line 92) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::add_vertex (line 188) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::fetch_mut (line 442) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::fetch (line 421) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::in_neighbors_count (line 698) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::edge_count (line 378) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::add_edge_with_weight (line 240) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::add_edge (line 209) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::is_cyclic (line 621) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::fold (line 596) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::in_neighbors (line 756) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::edges (line 854) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::has_edge (line 353) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::bfs (line 1010) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::neighbors (line 820) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::dfs (line 978) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::new (line 46) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::neighbors_count (line 674) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::shrink_to_fit (line 155) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::remove (line 470) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::roots (line 887) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::vertex_count (line 402) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::reserve (line 114) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::out_neighbors_count (line 725) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::vertices (line 951) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::retain (line 568) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::out_neighbors (line 790) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::remove_edge (line 522) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::set_weight (line 308) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::roots_count (line 650) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::tips (line 919) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::with_capacity (line 68) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::topo (line 1061) ... ok
[INFO] [stdout] test src/lib.rs -  (line 14) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::weight (line 273) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 35 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "e21348d8229679527ee6b7f169dcc06e2b5b1d0afd52b50f2c174f804befdfeb"`
[INFO] running `"docker" "rm" "-f" "e21348d8229679527ee6b7f169dcc06e2b5b1d0afd52b50f2c174f804befdfeb"`
[INFO] [stdout] e21348d8229679527ee6b7f169dcc06e2b5b1d0afd52b50f2c174f804befdfeb