[INFO] updating cached repository cdacos/djikstra_in_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cdacos/djikstra_in_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cdacos/djikstra_in_rust" "work/ex/beta-1.37-6/sources/1.36.0/gh/cdacos/djikstra_in_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/cdacos/djikstra_in_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cdacos/djikstra_in_rust" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cdacos/djikstra_in_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cdacos/djikstra_in_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6763fb352669d71779ce24960533d99d66ff822b
[INFO] sha for GitHub repo cdacos/djikstra_in_rust: 6763fb352669d71779ce24960533d99d66ff822b
[INFO] validating manifest of cdacos/djikstra_in_rust on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of cdacos/djikstra_in_rust on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing cdacos/djikstra_in_rust
[INFO] finished frobbing cdacos/djikstra_in_rust
[INFO] frobbed toml for cdacos/djikstra_in_rust written to work/ex/beta-1.37-6/sources/1.36.0/gh/cdacos/djikstra_in_rust/Cargo.toml
[INFO] started frobbing cdacos/djikstra_in_rust
[INFO] finished frobbing cdacos/djikstra_in_rust
[INFO] frobbed toml for cdacos/djikstra_in_rust written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cdacos/djikstra_in_rust/Cargo.toml
[INFO] crate cdacos/djikstra_in_rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing cdacos/djikstra_in_rust against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cdacos/djikstra_in_rust:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 1c112ec2c38ebeb51fea3d90efa427041f8a91ca4d072caf46cb09678e8ffe5a
[INFO] running `"docker" "start" "-a" "1c112ec2c38ebeb51fea3d90efa427041f8a91ca4d072caf46cb09678e8ffe5a"`
[INFO] [stderr]    Compiling djikstra v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:43:21
[INFO] [stderr]    |
[INFO] [stderr] 43 |                 let mut neighbours = adjacencies.get_mut(&edge[0]).expect("?");
[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]   --> src/main.rs:48:21
[INFO] [stderr]    |
[INFO] [stderr] 48 |                 let mut neighbours = adjacencies.get_mut(&edge[1]).expect("?");
[INFO] [stderr]    |                     ----^^^^^^^^^^
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.77s
[INFO] running `"docker" "inspect" "1c112ec2c38ebeb51fea3d90efa427041f8a91ca4d072caf46cb09678e8ffe5a"`
[INFO] running `"docker" "rm" "-f" "1c112ec2c38ebeb51fea3d90efa427041f8a91ca4d072caf46cb09678e8ffe5a"`
[INFO] [stdout] 1c112ec2c38ebeb51fea3d90efa427041f8a91ca4d072caf46cb09678e8ffe5a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cdacos/djikstra_in_rust:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 249eb39433ec08a4768be0a187607a463cb06bce4400c532c202bcca2f4d4071
[INFO] running `"docker" "start" "-a" "249eb39433ec08a4768be0a187607a463cb06bce4400c532c202bcca2f4d4071"`
[INFO] [stderr]    Compiling djikstra v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:43:21
[INFO] [stderr]    |
[INFO] [stderr] 43 |                 let mut neighbours = adjacencies.get_mut(&edge[0]).expect("?");
[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]   --> src/main.rs:48:21
[INFO] [stderr]    |
[INFO] [stderr] 48 |                 let mut neighbours = adjacencies.get_mut(&edge[1]).expect("?");
[INFO] [stderr]    |                     ----^^^^^^^^^^
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "249eb39433ec08a4768be0a187607a463cb06bce4400c532c202bcca2f4d4071"`
[INFO] running `"docker" "rm" "-f" "249eb39433ec08a4768be0a187607a463cb06bce4400c532c202bcca2f4d4071"`
[INFO] [stdout] 249eb39433ec08a4768be0a187607a463cb06bce4400c532c202bcca2f4d4071
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cdacos/djikstra_in_rust:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] e70735e21bff350440fe2cb134b3840d07a7070566c40fc79f126ecc685da87f
[INFO] running `"docker" "start" "-a" "e70735e21bff350440fe2cb134b3840d07a7070566c40fc79f126ecc685da87f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/djikstra-d2e37e5de3a1f6fd
[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" "e70735e21bff350440fe2cb134b3840d07a7070566c40fc79f126ecc685da87f"`
[INFO] running `"docker" "rm" "-f" "e70735e21bff350440fe2cb134b3840d07a7070566c40fc79f126ecc685da87f"`
[INFO] [stdout] e70735e21bff350440fe2cb134b3840d07a7070566c40fc79f126ecc685da87f