Dec 19 19:01:50.874 INFO checking christiansakai/toy_blockchain_rust against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 19:01:50.874 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/christiansakai/toy_blockchain_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=forbid" "-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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 19:01:51.417 INFO [stdout] 1e9131ec782e172bdb9ea33058bd74eae444128c50c415072d1842b091f2d4e6
Dec 19 19:01:51.422 INFO running `"docker" "start" "-a" "1e9131ec782e172bdb9ea33058bd74eae444128c50c415072d1842b091f2d4e6"`
Dec 19 19:01:52.877 INFO [stderr]     Checking toy_blockchain v0.1.0 (/opt/crater/workdir)
Dec 19 19:01:53.575 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.575 INFO [stderr]   --> src/main.rs:16:5
Dec 19 19:01:53.575 INFO [stderr]    |
Dec 19 19:01:53.575 INFO [stderr] 16 |     io::stdout().flush();
Dec 19 19:01:53.575 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.575 INFO [stderr]    |
Dec 19 19:01:53.575 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 19:01:53.575 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.575 INFO [stderr] 
Dec 19 19:01:53.575 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.575 INFO [stderr]   --> src/main.rs:17:5
Dec 19 19:01:53.575 INFO [stderr]    |
Dec 19 19:01:53.575 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_address);
Dec 19 19:01:53.575 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.575 INFO [stderr]    |
Dec 19 19:01:53.575 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.575 INFO [stderr] 
Dec 19 19:01:53.575 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.575 INFO [stderr]   --> src/main.rs:19:5
Dec 19 19:01:53.575 INFO [stderr]    |
Dec 19 19:01:53.575 INFO [stderr] 19 |     io::stdout().flush();
Dec 19 19:01:53.575 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.575 INFO [stderr]    |
Dec 19 19:01:53.575 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.575 INFO [stderr] 
Dec 19 19:01:53.576 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.576 INFO [stderr]   --> src/main.rs:20:5
Dec 19 19:01:53.576 INFO [stderr]    |
Dec 19 19:01:53.576 INFO [stderr] 20 |     io::stdin().read_line(&mut difficulty);
Dec 19 19:01:53.576 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.576 INFO [stderr]    |
Dec 19 19:01:53.576 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.576 INFO [stderr] 
Dec 19 19:01:53.576 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.576 INFO [stderr]   --> src/main.rs:38:9
Dec 19 19:01:53.576 INFO [stderr]    |
Dec 19 19:01:53.576 INFO [stderr] 38 |         io::stdout().flush();
Dec 19 19:01:53.576 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.576 INFO [stderr]    |
Dec 19 19:01:53.576 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.576 INFO [stderr] 
Dec 19 19:01:53.576 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.576 INFO [stderr]   --> src/main.rs:41:9
Dec 19 19:01:53.576 INFO [stderr]    |
Dec 19 19:01:53.576 INFO [stderr] 41 |         io::stdin().read_line(&mut choice);
Dec 19 19:01:53.576 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.576 INFO [stderr]    |
Dec 19 19:01:53.576 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.576 INFO [stderr] 
Dec 19 19:01:53.579 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.579 INFO [stderr]   --> src/main.rs:57:17
Dec 19 19:01:53.579 INFO [stderr]    |
Dec 19 19:01:53.579 INFO [stderr] 57 |                 io::stdout().flush();
Dec 19 19:01:53.579 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.579 INFO [stderr]    |
Dec 19 19:01:53.579 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.579 INFO [stderr] 
Dec 19 19:01:53.579 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.579 INFO [stderr]   --> src/main.rs:58:17
Dec 19 19:01:53.579 INFO [stderr]    |
Dec 19 19:01:53.579 INFO [stderr] 58 |                 io::stdin().read_line(&mut sender);
Dec 19 19:01:53.579 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.579 INFO [stderr]    |
Dec 19 19:01:53.579 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.579 INFO [stderr] 
Dec 19 19:01:53.579 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.579 INFO [stderr]   --> src/main.rs:60:17
Dec 19 19:01:53.579 INFO [stderr]    |
Dec 19 19:01:53.579 INFO [stderr] 60 |                 io::stdout().flush();
Dec 19 19:01:53.579 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.579 INFO [stderr]    |
Dec 19 19:01:53.579 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.579 INFO [stderr] 
Dec 19 19:01:53.579 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.579 INFO [stderr]   --> src/main.rs:61:17
Dec 19 19:01:53.579 INFO [stderr]    |
Dec 19 19:01:53.579 INFO [stderr] 61 |                 io::stdin().read_line(&mut receiver);
Dec 19 19:01:53.579 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.579 INFO [stderr]    |
Dec 19 19:01:53.579 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.579 INFO [stderr] 
Dec 19 19:01:53.579 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.579 INFO [stderr]   --> src/main.rs:63:17
Dec 19 19:01:53.579 INFO [stderr]    |
Dec 19 19:01:53.579 INFO [stderr] 63 |                 io::stdout().flush();
Dec 19 19:01:53.579 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.579 INFO [stderr]    |
Dec 19 19:01:53.579 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.579 INFO [stderr] 
Dec 19 19:01:53.579 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.579 INFO [stderr]   --> src/main.rs:64:17
Dec 19 19:01:53.579 INFO [stderr]    |
Dec 19 19:01:53.579 INFO [stderr] 64 |                 io::stdin().read_line(&mut amount);
Dec 19 19:01:53.579 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.579 INFO [stderr]    |
Dec 19 19:01:53.579 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.579 INFO [stderr] 
Dec 19 19:01:53.579 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.579 INFO [stderr]   --> src/main.rs:90:17
Dec 19 19:01:53.579 INFO [stderr]    |
Dec 19 19:01:53.579 INFO [stderr] 90 |                 io::stdout().flush();
Dec 19 19:01:53.579 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.579 INFO [stderr]    |
Dec 19 19:01:53.579 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.579 INFO [stderr] 
Dec 19 19:01:53.579 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.579 INFO [stderr]   --> src/main.rs:91:17
Dec 19 19:01:53.579 INFO [stderr]    |
Dec 19 19:01:53.579 INFO [stderr] 91 |                 io::stdin().read_line(&mut new_difficulty);
Dec 19 19:01:53.579 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.580 INFO [stderr]    |
Dec 19 19:01:53.580 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.580 INFO [stderr] 
Dec 19 19:01:53.580 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.580 INFO [stderr]    --> src/main.rs:105:17
Dec 19 19:01:53.580 INFO [stderr]     |
Dec 19 19:01:53.580 INFO [stderr] 105 |                 io::stdout().flush();
Dec 19 19:01:53.580 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.580 INFO [stderr]     |
Dec 19 19:01:53.580 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.580 INFO [stderr] 
Dec 19 19:01:53.580 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.580 INFO [stderr]    --> src/main.rs:106:17
Dec 19 19:01:53.580 INFO [stderr]     |
Dec 19 19:01:53.580 INFO [stderr] 106 |                 io::stdin().read_line(&mut new_reward);
Dec 19 19:01:53.580 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.580 INFO [stderr]     |
Dec 19 19:01:53.580 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.580 INFO [stderr] 
Dec 19 19:01:53.701 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.701 INFO [stderr]   --> src/main.rs:16:5
Dec 19 19:01:53.701 INFO [stderr]    |
Dec 19 19:01:53.701 INFO [stderr] 16 |     io::stdout().flush();
Dec 19 19:01:53.701 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.701 INFO [stderr]    |
Dec 19 19:01:53.701 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 19:01:53.701 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.701 INFO [stderr] 
Dec 19 19:01:53.701 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.701 INFO [stderr]   --> src/main.rs:17:5
Dec 19 19:01:53.701 INFO [stderr]    |
Dec 19 19:01:53.701 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_address);
Dec 19 19:01:53.701 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.701 INFO [stderr]    |
Dec 19 19:01:53.701 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.701 INFO [stderr] 
Dec 19 19:01:53.701 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.701 INFO [stderr]   --> src/main.rs:19:5
Dec 19 19:01:53.701 INFO [stderr]    |
Dec 19 19:01:53.701 INFO [stderr] 19 |     io::stdout().flush();
Dec 19 19:01:53.701 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.701 INFO [stderr]    |
Dec 19 19:01:53.701 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.701 INFO [stderr] 
Dec 19 19:01:53.701 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.701 INFO [stderr]   --> src/main.rs:20:5
Dec 19 19:01:53.701 INFO [stderr]    |
Dec 19 19:01:53.701 INFO [stderr] 20 |     io::stdin().read_line(&mut difficulty);
Dec 19 19:01:53.701 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.701 INFO [stderr]    |
Dec 19 19:01:53.701 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.701 INFO [stderr] 
Dec 19 19:01:53.701 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.701 INFO [stderr]   --> src/main.rs:38:9
Dec 19 19:01:53.701 INFO [stderr]    |
Dec 19 19:01:53.701 INFO [stderr] 38 |         io::stdout().flush();
Dec 19 19:01:53.701 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.701 INFO [stderr]    |
Dec 19 19:01:53.701 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.701 INFO [stderr] 
Dec 19 19:01:53.708 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.709 INFO [stderr]   --> src/main.rs:41:9
Dec 19 19:01:53.709 INFO [stderr]    |
Dec 19 19:01:53.709 INFO [stderr] 41 |         io::stdin().read_line(&mut choice);
Dec 19 19:01:53.709 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.709 INFO [stderr]    |
Dec 19 19:01:53.709 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.709 INFO [stderr] 
Dec 19 19:01:53.710 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.710 INFO [stderr]   --> src/main.rs:57:17
Dec 19 19:01:53.710 INFO [stderr]    |
Dec 19 19:01:53.710 INFO [stderr] 57 |                 io::stdout().flush();
Dec 19 19:01:53.710 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.710 INFO [stderr]    |
Dec 19 19:01:53.710 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.710 INFO [stderr] 
Dec 19 19:01:53.710 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.710 INFO [stderr]   --> src/main.rs:58:17
Dec 19 19:01:53.710 INFO [stderr]    |
Dec 19 19:01:53.710 INFO [stderr] 58 |                 io::stdin().read_line(&mut sender);
Dec 19 19:01:53.710 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.710 INFO [stderr]    |
Dec 19 19:01:53.710 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.710 INFO [stderr] 
Dec 19 19:01:53.710 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.710 INFO [stderr]   --> src/main.rs:60:17
Dec 19 19:01:53.710 INFO [stderr]    |
Dec 19 19:01:53.710 INFO [stderr] 60 |                 io::stdout().flush();
Dec 19 19:01:53.710 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.710 INFO [stderr]    |
Dec 19 19:01:53.710 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.710 INFO [stderr] 
Dec 19 19:01:53.710 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.710 INFO [stderr]   --> src/main.rs:61:17
Dec 19 19:01:53.710 INFO [stderr]    |
Dec 19 19:01:53.710 INFO [stderr] 61 |                 io::stdin().read_line(&mut receiver);
Dec 19 19:01:53.710 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.710 INFO [stderr]    |
Dec 19 19:01:53.710 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.710 INFO [stderr] 
Dec 19 19:01:53.710 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.710 INFO [stderr]   --> src/main.rs:63:17
Dec 19 19:01:53.710 INFO [stderr]    |
Dec 19 19:01:53.710 INFO [stderr] 63 |                 io::stdout().flush();
Dec 19 19:01:53.710 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.710 INFO [stderr]    |
Dec 19 19:01:53.710 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.710 INFO [stderr] 
Dec 19 19:01:53.710 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.710 INFO [stderr]   --> src/main.rs:64:17
Dec 19 19:01:53.710 INFO [stderr]    |
Dec 19 19:01:53.710 INFO [stderr] 64 |                 io::stdin().read_line(&mut amount);
Dec 19 19:01:53.710 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.710 INFO [stderr]    |
Dec 19 19:01:53.710 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.710 INFO [stderr] 
Dec 19 19:01:53.710 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.710 INFO [stderr]   --> src/main.rs:90:17
Dec 19 19:01:53.710 INFO [stderr]    |
Dec 19 19:01:53.710 INFO [stderr] 90 |                 io::stdout().flush();
Dec 19 19:01:53.710 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.710 INFO [stderr]    |
Dec 19 19:01:53.710 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.710 INFO [stderr] 
Dec 19 19:01:53.710 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.710 INFO [stderr]   --> src/main.rs:91:17
Dec 19 19:01:53.710 INFO [stderr]    |
Dec 19 19:01:53.710 INFO [stderr] 91 |                 io::stdin().read_line(&mut new_difficulty);
Dec 19 19:01:53.711 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.711 INFO [stderr]    |
Dec 19 19:01:53.711 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.711 INFO [stderr] 
Dec 19 19:01:53.711 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.711 INFO [stderr]    --> src/main.rs:105:17
Dec 19 19:01:53.711 INFO [stderr]     |
Dec 19 19:01:53.711 INFO [stderr] 105 |                 io::stdout().flush();
Dec 19 19:01:53.711 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.711 INFO [stderr]     |
Dec 19 19:01:53.711 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.711 INFO [stderr] 
Dec 19 19:01:53.711 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:01:53.711 INFO [stderr]    --> src/main.rs:106:17
Dec 19 19:01:53.711 INFO [stderr]     |
Dec 19 19:01:53.711 INFO [stderr] 106 |                 io::stdin().read_line(&mut new_reward);
Dec 19 19:01:53.712 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:01:53.712 INFO [stderr]     |
Dec 19 19:01:53.712 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:01:53.712 INFO [stderr] 
Dec 19 19:01:53.768 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.03s
Dec 19 19:01:54.527 INFO running `"docker" "inspect" "1e9131ec782e172bdb9ea33058bd74eae444128c50c415072d1842b091f2d4e6"`
Dec 19 19:01:54.858 INFO running `"docker" "rm" "-f" "1e9131ec782e172bdb9ea33058bd74eae444128c50c415072d1842b091f2d4e6"`
Dec 19 19:01:55.164 INFO [stdout] 1e9131ec782e172bdb9ea33058bd74eae444128c50c415072d1842b091f2d4e6