[INFO] updating cached repository garyemerson/breadth_first_search_shortest_reach
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/garyemerson/breadth_first_search_shortest_reach
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/garyemerson/breadth_first_search_shortest_reach" "work/ex/beta-1.37-6/sources/1.36.0/gh/garyemerson/breadth_first_search_shortest_reach"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/garyemerson/breadth_first_search_shortest_reach'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/garyemerson/breadth_first_search_shortest_reach" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/garyemerson/breadth_first_search_shortest_reach"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/garyemerson/breadth_first_search_shortest_reach'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7c621ee57319559079e0398369287452327d7d94
[INFO] sha for GitHub repo garyemerson/breadth_first_search_shortest_reach: 7c621ee57319559079e0398369287452327d7d94
[INFO] validating manifest of garyemerson/breadth_first_search_shortest_reach 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 garyemerson/breadth_first_search_shortest_reach 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 garyemerson/breadth_first_search_shortest_reach
[INFO] finished frobbing garyemerson/breadth_first_search_shortest_reach
[INFO] frobbed toml for garyemerson/breadth_first_search_shortest_reach written to work/ex/beta-1.37-6/sources/1.36.0/gh/garyemerson/breadth_first_search_shortest_reach/Cargo.toml
[INFO] started frobbing garyemerson/breadth_first_search_shortest_reach
[INFO] finished frobbing garyemerson/breadth_first_search_shortest_reach
[INFO] frobbed toml for garyemerson/breadth_first_search_shortest_reach written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/garyemerson/breadth_first_search_shortest_reach/Cargo.toml
[INFO] crate garyemerson/breadth_first_search_shortest_reach 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 garyemerson/breadth_first_search_shortest_reach against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/garyemerson/breadth_first_search_shortest_reach:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 98fe3967c2c87eac3f83efcc5a8d319a7cb46ac89c6fd09edac1f0d3f3d40c17
[INFO] running `"docker" "start" "-a" "98fe3967c2c87eac3f83efcc5a8d319a7cb46ac89c6fd09edac1f0d3f3d40c17"`
[INFO] [stderr]    Compiling breadth_first_search_shortest_reach v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `num_edges`
[INFO] [stderr]   --> src/main.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     num_edges: i32,
[INFO] [stderr]    |     ^^^^^^^^^ help: consider prefixing with an underscore: `_num_edges`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.94s
[INFO] running `"docker" "inspect" "98fe3967c2c87eac3f83efcc5a8d319a7cb46ac89c6fd09edac1f0d3f3d40c17"`
[INFO] running `"docker" "rm" "-f" "98fe3967c2c87eac3f83efcc5a8d319a7cb46ac89c6fd09edac1f0d3f3d40c17"`
[INFO] [stdout] 98fe3967c2c87eac3f83efcc5a8d319a7cb46ac89c6fd09edac1f0d3f3d40c17
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/garyemerson/breadth_first_search_shortest_reach:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 8ceb9760375e300f0057833400d3c8248e809b91309b1a199cd1e523f1e5e209
[INFO] running `"docker" "start" "-a" "8ceb9760375e300f0057833400d3c8248e809b91309b1a199cd1e523f1e5e209"`
[INFO] [stderr]    Compiling breadth_first_search_shortest_reach v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `num_edges`
[INFO] [stderr]   --> src/main.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     num_edges: i32,
[INFO] [stderr]    |     ^^^^^^^^^ help: consider prefixing with an underscore: `_num_edges`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `"docker" "inspect" "8ceb9760375e300f0057833400d3c8248e809b91309b1a199cd1e523f1e5e209"`
[INFO] running `"docker" "rm" "-f" "8ceb9760375e300f0057833400d3c8248e809b91309b1a199cd1e523f1e5e209"`
[INFO] [stdout] 8ceb9760375e300f0057833400d3c8248e809b91309b1a199cd1e523f1e5e209
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/garyemerson/breadth_first_search_shortest_reach:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 4bc71a207d2fd5c9e54dd9e381b9ee47cff680bef0360bd6bb22d614ffae111c
[INFO] running `"docker" "start" "-a" "4bc71a207d2fd5c9e54dd9e381b9ee47cff680bef0360bd6bb22d614ffae111c"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/breadth_first_search_shortest_reach-e946c3fb61f38eda
[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" "4bc71a207d2fd5c9e54dd9e381b9ee47cff680bef0360bd6bb22d614ffae111c"`
[INFO] running `"docker" "rm" "-f" "4bc71a207d2fd5c9e54dd9e381b9ee47cff680bef0360bd6bb22d614ffae111c"`
[INFO] [stdout] 4bc71a207d2fd5c9e54dd9e381b9ee47cff680bef0360bd6bb22d614ffae111c