[INFO] crate graphlib 0.3.1 is already in cache
[INFO] extracting crate graphlib 0.3.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/graphlib/0.3.1
[INFO] extracting crate graphlib 0.3.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/graphlib/0.3.1
[INFO] validating manifest of graphlib-0.3.1 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 graphlib-0.3.1 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 graphlib-0.3.1
[INFO] finished frobbing graphlib-0.3.1
[INFO] frobbed toml for graphlib-0.3.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/graphlib/0.3.1/Cargo.toml
[INFO] started frobbing graphlib-0.3.1
[INFO] finished frobbing graphlib-0.3.1
[INFO] frobbed toml for graphlib-0.3.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/graphlib/0.3.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 graphlib-0.3.1 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/graphlib/0.3.1:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 835e11e3b240a42b6166119fc7003a81d9d2d8814418ccba3b5a1d8abd7189dd
[INFO] running `"docker" "start" "-a" "835e11e3b240a42b6166119fc7003a81d9d2d8814418ccba3b5a1d8abd7189dd"`
[INFO] [stderr]    Compiling hashbrown v0.1.8
[INFO] [stderr]    Compiling graphlib v0.3.1 (/opt/crater/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: `edges_hm_ref`
[INFO] [stderr]     --> src/graph.rs:1117:5
[INFO] [stderr]      |
[INFO] [stderr] 1117 |     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:1122:5
[INFO] [stderr]      |
[INFO] [stderr] 1122 |     fn vertex_hm_ref(&self) -> &HashMap<VertexId, (T, VertexId)> {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.93s
[INFO] running `"docker" "inspect" "835e11e3b240a42b6166119fc7003a81d9d2d8814418ccba3b5a1d8abd7189dd"`
[INFO] running `"docker" "rm" "-f" "835e11e3b240a42b6166119fc7003a81d9d2d8814418ccba3b5a1d8abd7189dd"`
[INFO] [stdout] 835e11e3b240a42b6166119fc7003a81d9d2d8814418ccba3b5a1d8abd7189dd
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/graphlib/0.3.1:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] df3e70de501bb8eaa1b2207da879e9c38c23b42260a2ec14325573acd20a0399
[INFO] running `"docker" "start" "-a" "df3e70de501bb8eaa1b2207da879e9c38c23b42260a2ec14325573acd20a0399"`
[INFO] [stderr]    Compiling graphlib v0.3.1 (/opt/crater/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: `edges_hm_ref`
[INFO] [stderr]     --> src/graph.rs:1117:5
[INFO] [stderr]      |
[INFO] [stderr] 1117 |     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:1122:5
[INFO] [stderr]      |
[INFO] [stderr] 1122 |     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 2.77s
[INFO] running `"docker" "inspect" "df3e70de501bb8eaa1b2207da879e9c38c23b42260a2ec14325573acd20a0399"`
[INFO] running `"docker" "rm" "-f" "df3e70de501bb8eaa1b2207da879e9c38c23b42260a2ec14325573acd20a0399"`
[INFO] [stdout] df3e70de501bb8eaa1b2207da879e9c38c23b42260a2ec14325573acd20a0399
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/graphlib/0.3.1:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 053566faeed5d9a4670f64ce0cfedb97f143f19795d62a29a44a7ce96d4fcafe
[INFO] running `"docker" "start" "-a" "053566faeed5d9a4670f64ce0cfedb97f143f19795d62a29a44a7ce96d4fcafe"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/graphlib-34d7a515d2ddc6d9
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test iterators::dfs::tests::not_cyclic ... ok
[INFO] [stdout] test graph::tests::dfs ... ok
[INFO] [stdout] test graph::tests::dfs_mul_roots ... ok
[INFO] [stdout] test iterators::dfs::tests::is_cyclic ... ok
[INFO] [stderr]    Doc-tests graphlib
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 33 tests
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::capacity (line 83) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::add_vertex (line 172) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::add_edge_with_weight (line 223) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::edges (line 822) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::edge_count (line 361) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::add_edge (line 192) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::bfs (line 945) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::dfs (line 913) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::fetch (line 404) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::fetch_mut (line 425) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::fold (line 564) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::has_edge (line 336) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::in_neighbors_count (line 666) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::in_neighbors (line 724) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::is_cyclic (line 589) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::new (line 45) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::neighbors (line 788) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::neighbors_count (line 642) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::remove (line 453) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::reserve (line 104) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::retain (line 534) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::out_neighbors (line 758) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::out_neighbors_count (line 693) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::roots (line 855) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::remove_edge (line 488) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::vertex_count (line 385) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::with_capacity (line 66) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::shrink_to_fit (line 140) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::roots_count (line 618) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::set_weight (line 291) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::vertices (line 886) ... ok
[INFO] [stdout] test src/graph.rs - graph::Graph<T>::weight (line 256) ... ok
[INFO] [stdout] test src/lib.rs -  (line 14) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 33 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "053566faeed5d9a4670f64ce0cfedb97f143f19795d62a29a44a7ce96d4fcafe"`
[INFO] running `"docker" "rm" "-f" "053566faeed5d9a4670f64ce0cfedb97f143f19795d62a29a44a7ce96d4fcafe"`
[INFO] [stdout] 053566faeed5d9a4670f64ce0cfedb97f143f19795d62a29a44a7ce96d4fcafe