Dec 02 00:19:41.758 INFO testing arjanvaneersel/rust-blockchain against 1.30.1 for beta-1.31-5
Dec 02 00:19:41.758 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-5/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/beta-1.31-5/1.30.1:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1.30.1 build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 02 00:19:42.139 INFO [stdout] c59fde454b5b0e8328eaa5d3244aa62c03852465d044ae1fbb951e045cbf66c3
Dec 02 00:19:42.145 INFO running `"docker" "start" "-a" "c59fde454b5b0e8328eaa5d3244aa62c03852465d044ae1fbb951e045cbf66c3"`
Dec 02 00:19:42.755 INFO [stderr] usermod: no changes
Dec 02 00:19:42.852 INFO [stderr]    Compiling bfs v0.1.0 (/source)
Dec 02 00:19:44.109 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:44.109 INFO [stderr]   --> src/main.rs:17:5
Dec 02 00:19:44.109 INFO [stderr]    |
Dec 02 00:19:44.109 INFO [stderr] 17 |     io::stdout().flush();
Dec 02 00:19:44.109 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:44.109 INFO [stderr]    |
Dec 02 00:19:44.109 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 02 00:19:44.109 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:44.109 INFO [stderr] 
Dec 02 00:19:44.109 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:44.109 INFO [stderr]   --> src/main.rs:18:5
Dec 02 00:19:44.109 INFO [stderr]    |
Dec 02 00:19:44.109 INFO [stderr] 18 |     io::stdin().read_line(&mut miner_addr);
Dec 02 00:19:44.109 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:44.110 INFO [stderr] 
Dec 02 00:19:44.110 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:44.110 INFO [stderr]   --> src/main.rs:21:5
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr] 21 |     io::stdout().flush();
Dec 02 00:19:44.110 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:44.110 INFO [stderr] 
Dec 02 00:19:44.110 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:44.110 INFO [stderr]   --> src/main.rs:22:5
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr] 22 |     io::stdin().read_line(&mut difficulty);
Dec 02 00:19:44.110 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:44.110 INFO [stderr] 
Dec 02 00:19:44.110 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:44.110 INFO [stderr]   --> src/main.rs:36:9
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr] 36 |         io::stdout().flush();
Dec 02 00:19:44.110 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:44.110 INFO [stderr] 
Dec 02 00:19:44.110 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:44.110 INFO [stderr]   --> src/main.rs:38:9
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr] 38 |         io::stdin().read_line(&mut choice);
Dec 02 00:19:44.110 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:44.110 INFO [stderr] 
Dec 02 00:19:44.110 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:44.110 INFO [stderr]   --> src/main.rs:52:17
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr] 52 |                 io::stdout().flush();
Dec 02 00:19:44.110 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:44.110 INFO [stderr] 
Dec 02 00:19:44.110 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:44.110 INFO [stderr]   --> src/main.rs:53:17
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr] 53 |                 io::stdin().read_line(&mut sender);
Dec 02 00:19:44.110 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:44.110 INFO [stderr] 
Dec 02 00:19:44.110 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:44.110 INFO [stderr]   --> src/main.rs:56:17
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr] 56 |                 io::stdout().flush();
Dec 02 00:19:44.110 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:44.110 INFO [stderr] 
Dec 02 00:19:44.110 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:44.110 INFO [stderr]   --> src/main.rs:57:17
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr] 57 |                 io::stdin().read_line(&mut receiver);
Dec 02 00:19:44.110 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:44.110 INFO [stderr] 
Dec 02 00:19:44.110 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:44.110 INFO [stderr]   --> src/main.rs:60:17
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr] 60 |                 io::stdout().flush();
Dec 02 00:19:44.110 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:44.110 INFO [stderr] 
Dec 02 00:19:44.110 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:44.110 INFO [stderr]   --> src/main.rs:61:17
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr] 61 |                 io::stdin().read_line(&mut amount);
Dec 02 00:19:44.110 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:44.110 INFO [stderr]    |
Dec 02 00:19:44.110 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:44.110 INFO [stderr] 
Dec 02 00:19:44.110 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:44.110 INFO [stderr]   --> src/main.rs:80:17
Dec 02 00:19:44.111 INFO [stderr]    |
Dec 02 00:19:44.111 INFO [stderr] 80 |                 io::stdout().flush();
Dec 02 00:19:44.111 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:44.111 INFO [stderr]    |
Dec 02 00:19:44.111 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:44.111 INFO [stderr] 
Dec 02 00:19:44.111 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:44.111 INFO [stderr]   --> src/main.rs:81:17
Dec 02 00:19:44.111 INFO [stderr]    |
Dec 02 00:19:44.111 INFO [stderr] 81 |                 io::stdin().read_line(&mut new_diff);
Dec 02 00:19:44.111 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:44.111 INFO [stderr]    |
Dec 02 00:19:44.111 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:44.111 INFO [stderr] 
Dec 02 00:19:44.111 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:44.111 INFO [stderr]   --> src/main.rs:93:17
Dec 02 00:19:44.111 INFO [stderr]    |
Dec 02 00:19:44.111 INFO [stderr] 93 |                 io::stdout().flush();
Dec 02 00:19:44.111 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:44.111 INFO [stderr]    |
Dec 02 00:19:44.111 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:44.111 INFO [stderr] 
Dec 02 00:19:44.111 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:44.111 INFO [stderr]   --> src/main.rs:94:17
Dec 02 00:19:44.111 INFO [stderr]    |
Dec 02 00:19:44.111 INFO [stderr] 94 |                 io::stdin().read_line(&mut new_reward);
Dec 02 00:19:44.111 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:44.111 INFO [stderr]    |
Dec 02 00:19:44.111 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:44.111 INFO [stderr] 
Dec 02 00:19:45.146 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.36s
Dec 02 00:19:45.152 INFO [stderr] su: No module specific data is present
Dec 02 00:19:45.516 INFO running `"docker" "inspect" "c59fde454b5b0e8328eaa5d3244aa62c03852465d044ae1fbb951e045cbf66c3"`
Dec 02 00:19:45.599 INFO running `"docker" "rm" "-f" "c59fde454b5b0e8328eaa5d3244aa62c03852465d044ae1fbb951e045cbf66c3"`
Dec 02 00:19:45.871 INFO [stdout] c59fde454b5b0e8328eaa5d3244aa62c03852465d044ae1fbb951e045cbf66c3
Dec 02 00:19:45.876 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-5/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/beta-1.31-5/1.30.1:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1.30.1 test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 02 00:19:46.212 INFO [stdout] b007428541bc0b502d4047dd620dbea69b980b2f364ab132331a61646e3b07f5
Dec 02 00:19:46.216 INFO running `"docker" "start" "-a" "b007428541bc0b502d4047dd620dbea69b980b2f364ab132331a61646e3b07f5"`
Dec 02 00:19:47.219 INFO [stderr] usermod: no changes
Dec 02 00:19:47.343 INFO [stderr]    Compiling bfs v0.1.0 (/source)
Dec 02 00:19:48.471 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:48.471 INFO [stderr]   --> src/main.rs:17:5
Dec 02 00:19:48.471 INFO [stderr]    |
Dec 02 00:19:48.471 INFO [stderr] 17 |     io::stdout().flush();
Dec 02 00:19:48.471 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:48.471 INFO [stderr]    |
Dec 02 00:19:48.471 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 02 00:19:48.471 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:48.471 INFO [stderr] 
Dec 02 00:19:48.471 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:48.471 INFO [stderr]   --> src/main.rs:18:5
Dec 02 00:19:48.471 INFO [stderr]    |
Dec 02 00:19:48.471 INFO [stderr] 18 |     io::stdin().read_line(&mut miner_addr);
Dec 02 00:19:48.471 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:48.471 INFO [stderr]    |
Dec 02 00:19:48.471 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:48.471 INFO [stderr] 
Dec 02 00:19:48.471 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:48.471 INFO [stderr]   --> src/main.rs:21:5
Dec 02 00:19:48.471 INFO [stderr]    |
Dec 02 00:19:48.471 INFO [stderr] 21 |     io::stdout().flush();
Dec 02 00:19:48.471 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:48.471 INFO [stderr]    |
Dec 02 00:19:48.471 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:48.471 INFO [stderr] 
Dec 02 00:19:48.471 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:48.471 INFO [stderr]   --> src/main.rs:22:5
Dec 02 00:19:48.471 INFO [stderr]    |
Dec 02 00:19:48.471 INFO [stderr] 22 |     io::stdin().read_line(&mut difficulty);
Dec 02 00:19:48.471 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:48.471 INFO [stderr]    |
Dec 02 00:19:48.471 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:48.471 INFO [stderr] 
Dec 02 00:19:48.472 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:48.472 INFO [stderr]   --> src/main.rs:36:9
Dec 02 00:19:48.472 INFO [stderr]    |
Dec 02 00:19:48.472 INFO [stderr] 36 |         io::stdout().flush();
Dec 02 00:19:48.472 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:48.472 INFO [stderr]    |
Dec 02 00:19:48.472 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:48.472 INFO [stderr] 
Dec 02 00:19:48.472 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:48.472 INFO [stderr]   --> src/main.rs:38:9
Dec 02 00:19:48.472 INFO [stderr]    |
Dec 02 00:19:48.472 INFO [stderr] 38 |         io::stdin().read_line(&mut choice);
Dec 02 00:19:48.472 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:48.472 INFO [stderr]    |
Dec 02 00:19:48.472 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:48.472 INFO [stderr] 
Dec 02 00:19:48.472 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:48.472 INFO [stderr]   --> src/main.rs:52:17
Dec 02 00:19:48.472 INFO [stderr]    |
Dec 02 00:19:48.472 INFO [stderr] 52 |                 io::stdout().flush();
Dec 02 00:19:48.472 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:48.472 INFO [stderr]    |
Dec 02 00:19:48.472 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:48.472 INFO [stderr] 
Dec 02 00:19:48.472 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:48.472 INFO [stderr]   --> src/main.rs:53:17
Dec 02 00:19:48.472 INFO [stderr]    |
Dec 02 00:19:48.472 INFO [stderr] 53 |                 io::stdin().read_line(&mut sender);
Dec 02 00:19:48.472 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:48.472 INFO [stderr]    |
Dec 02 00:19:48.472 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:48.472 INFO [stderr] 
Dec 02 00:19:48.472 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:48.472 INFO [stderr]   --> src/main.rs:56:17
Dec 02 00:19:48.472 INFO [stderr]    |
Dec 02 00:19:48.472 INFO [stderr] 56 |                 io::stdout().flush();
Dec 02 00:19:48.472 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:48.472 INFO [stderr]    |
Dec 02 00:19:48.472 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:48.472 INFO [stderr] 
Dec 02 00:19:48.472 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:48.472 INFO [stderr]   --> src/main.rs:57:17
Dec 02 00:19:48.472 INFO [stderr]    |
Dec 02 00:19:48.472 INFO [stderr] 57 |                 io::stdin().read_line(&mut receiver);
Dec 02 00:19:48.472 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:48.472 INFO [stderr]    |
Dec 02 00:19:48.472 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:48.472 INFO [stderr] 
Dec 02 00:19:48.473 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:48.473 INFO [stderr]   --> src/main.rs:60:17
Dec 02 00:19:48.473 INFO [stderr]    |
Dec 02 00:19:48.473 INFO [stderr] 60 |                 io::stdout().flush();
Dec 02 00:19:48.473 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:48.473 INFO [stderr]    |
Dec 02 00:19:48.473 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:48.473 INFO [stderr] 
Dec 02 00:19:48.473 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:48.473 INFO [stderr]   --> src/main.rs:61:17
Dec 02 00:19:48.473 INFO [stderr]    |
Dec 02 00:19:48.473 INFO [stderr] 61 |                 io::stdin().read_line(&mut amount);
Dec 02 00:19:48.473 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:48.473 INFO [stderr]    |
Dec 02 00:19:48.473 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:48.473 INFO [stderr] 
Dec 02 00:19:48.473 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:48.473 INFO [stderr]   --> src/main.rs:80:17
Dec 02 00:19:48.473 INFO [stderr]    |
Dec 02 00:19:48.473 INFO [stderr] 80 |                 io::stdout().flush();
Dec 02 00:19:48.473 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:48.473 INFO [stderr]    |
Dec 02 00:19:48.473 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:48.473 INFO [stderr] 
Dec 02 00:19:48.479 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:48.479 INFO [stderr]   --> src/main.rs:81:17
Dec 02 00:19:48.479 INFO [stderr]    |
Dec 02 00:19:48.479 INFO [stderr] 81 |                 io::stdin().read_line(&mut new_diff);
Dec 02 00:19:48.479 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:48.479 INFO [stderr]    |
Dec 02 00:19:48.479 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:48.479 INFO [stderr] 
Dec 02 00:19:48.479 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:48.479 INFO [stderr]   --> src/main.rs:93:17
Dec 02 00:19:48.479 INFO [stderr]    |
Dec 02 00:19:48.479 INFO [stderr] 93 |                 io::stdout().flush();
Dec 02 00:19:48.479 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:48.479 INFO [stderr]    |
Dec 02 00:19:48.479 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:48.479 INFO [stderr] 
Dec 02 00:19:48.479 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 00:19:48.479 INFO [stderr]   --> src/main.rs:94:17
Dec 02 00:19:48.479 INFO [stderr]    |
Dec 02 00:19:48.479 INFO [stderr] 94 |                 io::stdin().read_line(&mut new_reward);
Dec 02 00:19:48.479 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 00:19:48.479 INFO [stderr]    |
Dec 02 00:19:48.479 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 00:19:48.479 INFO [stderr] 
Dec 02 00:19:48.999 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.74s
Dec 02 00:19:49.000 INFO [stderr] su: No module specific data is present
Dec 02 00:19:49.527 INFO running `"docker" "inspect" "b007428541bc0b502d4047dd620dbea69b980b2f364ab132331a61646e3b07f5"`
Dec 02 00:19:49.793 INFO running `"docker" "rm" "-f" "b007428541bc0b502d4047dd620dbea69b980b2f364ab132331a61646e3b07f5"`
Dec 02 00:19:50.107 INFO [stdout] b007428541bc0b502d4047dd620dbea69b980b2f364ab132331a61646e3b07f5
Dec 02 00:19:50.109 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-5/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/beta-1.31-5/1.30.1:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1.30.1 test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 02 00:19:50.640 INFO [stdout] 4e948471fca17ea1a37cc68252b4c37be809a7d912df29db857cbde2032d45ca
Dec 02 00:19:50.642 INFO running `"docker" "start" "-a" "4e948471fca17ea1a37cc68252b4c37be809a7d912df29db857cbde2032d45ca"`
Dec 02 00:19:51.747 INFO [stderr] usermod: no changes
Dec 02 00:19:51.850 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
Dec 02 00:19:51.854 INFO [stderr]      Running /target/debug/deps/bfs-de678aff470579f2
Dec 02 00:19:51.871 INFO [stdout] 
Dec 02 00:19:51.871 INFO [stdout] running 0 tests
Dec 02 00:19:51.871 INFO [stdout] 
Dec 02 00:19:51.871 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 02 00:19:51.871 INFO [stdout] 
Dec 02 00:19:51.883 INFO [stderr] su: No module specific data is present
Dec 02 00:19:52.499 INFO running `"docker" "inspect" "4e948471fca17ea1a37cc68252b4c37be809a7d912df29db857cbde2032d45ca"`
Dec 02 00:19:52.824 INFO running `"docker" "rm" "-f" "4e948471fca17ea1a37cc68252b4c37be809a7d912df29db857cbde2032d45ca"`
Dec 02 00:19:53.096 INFO [stdout] 4e948471fca17ea1a37cc68252b4c37be809a7d912df29db857cbde2032d45ca
