Dec 17 20:48:27.806 INFO checking lempiy/blockchain against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 20:48:27.806 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/lempiy/blockchain:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 20:48:28.286 INFO [stdout] 74c9e2aef03e9b0d5b40d06ae99fe90e391fcadc0d4cc447d8e6aa23cf3e639f
Dec 17 20:48:28.290 INFO running `"docker" "start" "-a" "74c9e2aef03e9b0d5b40d06ae99fe90e391fcadc0d4cc447d8e6aa23cf3e639f"`
Dec 17 20:48:30.459 INFO [stderr]     Checking serde v1.0.38
Dec 17 20:48:30.460 INFO [stderr]     Checking sha2 v0.7.0
Dec 17 20:48:30.460 INFO [stderr]    Compiling serde_derive v1.0.38
Dec 17 20:48:47.023 INFO [stderr]     Checking serde_json v1.0.14
Dec 17 20:48:49.136 INFO [stderr]     Checking blockchain v0.1.0 (/opt/crater/workdir)
Dec 17 20:48:49.913 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:49.913 INFO [stderr]   --> src/main.rs:16:5
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr] 16 |     io::stdout().flush();
Dec 17 20:48:49.913 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 20:48:49.913 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:49.913 INFO [stderr] 
Dec 17 20:48:49.913 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:49.913 INFO [stderr]   --> src/main.rs:17:5
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_addr);
Dec 17 20:48:49.913 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:49.913 INFO [stderr] 
Dec 17 20:48:49.913 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:49.913 INFO [stderr]   --> src/main.rs:20:5
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr] 20 |     io::stdout().flush();
Dec 17 20:48:49.913 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:49.913 INFO [stderr] 
Dec 17 20:48:49.913 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:49.913 INFO [stderr]   --> src/main.rs:21:5
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr] 21 |     io::stdin().read_line(&mut difficulty);
Dec 17 20:48:49.913 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:49.913 INFO [stderr] 
Dec 17 20:48:49.913 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:49.913 INFO [stderr]   --> src/main.rs:36:9
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr] 36 |         io::stdout().flush();
Dec 17 20:48:49.913 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:49.913 INFO [stderr] 
Dec 17 20:48:49.913 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:49.913 INFO [stderr]   --> src/main.rs:38:9
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr] 38 |         io::stdin().read_line(&mut choice);
Dec 17 20:48:49.913 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:49.913 INFO [stderr] 
Dec 17 20:48:49.913 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:49.913 INFO [stderr]   --> src/main.rs:54:17
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr] 54 |                 io::stdout().flush();
Dec 17 20:48:49.913 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:49.913 INFO [stderr] 
Dec 17 20:48:49.913 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:49.913 INFO [stderr]   --> src/main.rs:55:17
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr] 55 |                 io::stdin().read_line(&mut sender);
Dec 17 20:48:49.913 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:49.913 INFO [stderr] 
Dec 17 20:48:49.913 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:49.913 INFO [stderr]   --> src/main.rs:58:17
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr] 58 |                 io::stdout().flush();
Dec 17 20:48:49.913 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:49.913 INFO [stderr] 
Dec 17 20:48:49.913 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:49.913 INFO [stderr]   --> src/main.rs:59:17
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr] 59 |                 io::stdin().read_line(&mut reciever);
Dec 17 20:48:49.913 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:49.913 INFO [stderr] 
Dec 17 20:48:49.913 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:49.913 INFO [stderr]   --> src/main.rs:62:17
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr] 62 |                 io::stdout().flush();
Dec 17 20:48:49.913 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:49.913 INFO [stderr]    |
Dec 17 20:48:49.913 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:49.914 INFO [stderr] 
Dec 17 20:48:49.914 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:49.914 INFO [stderr]   --> src/main.rs:63:17
Dec 17 20:48:49.914 INFO [stderr]    |
Dec 17 20:48:49.914 INFO [stderr] 63 |                 io::stdin().read_line(&mut amount);
Dec 17 20:48:49.914 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:49.914 INFO [stderr]    |
Dec 17 20:48:49.914 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:49.914 INFO [stderr] 
Dec 17 20:48:49.914 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:49.914 INFO [stderr]   --> src/main.rs:85:17
Dec 17 20:48:49.914 INFO [stderr]    |
Dec 17 20:48:49.914 INFO [stderr] 85 |                 io::stdout().flush();
Dec 17 20:48:49.914 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:49.914 INFO [stderr]    |
Dec 17 20:48:49.914 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:49.914 INFO [stderr] 
Dec 17 20:48:49.914 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:49.914 INFO [stderr]   --> src/main.rs:86:17
Dec 17 20:48:49.914 INFO [stderr]    |
Dec 17 20:48:49.914 INFO [stderr] 86 |                 io::stdin().read_line(&mut new_diff);
Dec 17 20:48:49.914 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:49.914 INFO [stderr]    |
Dec 17 20:48:49.914 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:49.914 INFO [stderr] 
Dec 17 20:48:49.914 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:49.914 INFO [stderr]   --> src/main.rs:96:17
Dec 17 20:48:49.914 INFO [stderr]    |
Dec 17 20:48:49.914 INFO [stderr] 96 |                 io::stdout().flush();
Dec 17 20:48:49.914 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:49.914 INFO [stderr]    |
Dec 17 20:48:49.914 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:49.914 INFO [stderr] 
Dec 17 20:48:49.914 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:49.914 INFO [stderr]   --> src/main.rs:97:17
Dec 17 20:48:49.914 INFO [stderr]    |
Dec 17 20:48:49.914 INFO [stderr] 97 |                 io::stdin().read_line(&mut new_reward);
Dec 17 20:48:49.914 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:49.914 INFO [stderr]    |
Dec 17 20:48:49.914 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:49.914 INFO [stderr] 
Dec 17 20:48:50.145 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:50.146 INFO [stderr]   --> src/main.rs:16:5
Dec 17 20:48:50.146 INFO [stderr]    |
Dec 17 20:48:50.146 INFO [stderr] 16 |     io::stdout().flush();
Dec 17 20:48:50.147 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:50.147 INFO [stderr]    |
Dec 17 20:48:50.147 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 20:48:50.147 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:50.148 INFO [stderr] 
Dec 17 20:48:50.148 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:50.152 INFO [stderr]   --> src/main.rs:17:5
Dec 17 20:48:50.152 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_addr);
Dec 17 20:48:50.153 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:50.153 INFO [stderr] 
Dec 17 20:48:50.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:50.153 INFO [stderr]   --> src/main.rs:20:5
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr] 20 |     io::stdout().flush();
Dec 17 20:48:50.153 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:50.153 INFO [stderr] 
Dec 17 20:48:50.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:50.153 INFO [stderr]   --> src/main.rs:21:5
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr] 21 |     io::stdin().read_line(&mut difficulty);
Dec 17 20:48:50.153 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:50.153 INFO [stderr] 
Dec 17 20:48:50.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:50.153 INFO [stderr]   --> src/main.rs:36:9
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr] 36 |         io::stdout().flush();
Dec 17 20:48:50.153 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:50.153 INFO [stderr] 
Dec 17 20:48:50.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:50.153 INFO [stderr]   --> src/main.rs:38:9
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr] 38 |         io::stdin().read_line(&mut choice);
Dec 17 20:48:50.153 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:50.153 INFO [stderr] 
Dec 17 20:48:50.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:50.153 INFO [stderr]   --> src/main.rs:54:17
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr] 54 |                 io::stdout().flush();
Dec 17 20:48:50.153 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:50.153 INFO [stderr] 
Dec 17 20:48:50.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:50.153 INFO [stderr]   --> src/main.rs:55:17
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr] 55 |                 io::stdin().read_line(&mut sender);
Dec 17 20:48:50.153 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:50.153 INFO [stderr] 
Dec 17 20:48:50.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:50.153 INFO [stderr]   --> src/main.rs:58:17
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr] 58 |                 io::stdout().flush();
Dec 17 20:48:50.153 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:50.153 INFO [stderr] 
Dec 17 20:48:50.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:50.153 INFO [stderr]   --> src/main.rs:59:17
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr] 59 |                 io::stdin().read_line(&mut reciever);
Dec 17 20:48:50.153 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:50.153 INFO [stderr] 
Dec 17 20:48:50.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:50.153 INFO [stderr]   --> src/main.rs:62:17
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr] 62 |                 io::stdout().flush();
Dec 17 20:48:50.153 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:50.153 INFO [stderr] 
Dec 17 20:48:50.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:50.153 INFO [stderr]   --> src/main.rs:63:17
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr] 63 |                 io::stdin().read_line(&mut amount);
Dec 17 20:48:50.153 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.153 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:50.153 INFO [stderr] 
Dec 17 20:48:50.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:50.153 INFO [stderr]   --> src/main.rs:85:17
Dec 17 20:48:50.153 INFO [stderr]    |
Dec 17 20:48:50.154 INFO [stderr] 85 |                 io::stdout().flush();
Dec 17 20:48:50.154 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:50.154 INFO [stderr]    |
Dec 17 20:48:50.154 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:50.154 INFO [stderr] 
Dec 17 20:48:50.154 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:50.154 INFO [stderr]   --> src/main.rs:86:17
Dec 17 20:48:50.154 INFO [stderr]    |
Dec 17 20:48:50.154 INFO [stderr] 86 |                 io::stdin().read_line(&mut new_diff);
Dec 17 20:48:50.154 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:50.154 INFO [stderr]    |
Dec 17 20:48:50.154 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:50.154 INFO [stderr] 
Dec 17 20:48:50.154 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:50.154 INFO [stderr]   --> src/main.rs:96:17
Dec 17 20:48:50.154 INFO [stderr]    |
Dec 17 20:48:50.154 INFO [stderr] 96 |                 io::stdout().flush();
Dec 17 20:48:50.154 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:50.154 INFO [stderr]    |
Dec 17 20:48:50.154 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:50.154 INFO [stderr] 
Dec 17 20:48:50.154 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 20:48:50.154 INFO [stderr]   --> src/main.rs:97:17
Dec 17 20:48:50.154 INFO [stderr]    |
Dec 17 20:48:50.154 INFO [stderr] 97 |                 io::stdin().read_line(&mut new_reward);
Dec 17 20:48:50.154 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:48:50.154 INFO [stderr]    |
Dec 17 20:48:50.154 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 20:48:50.154 INFO [stderr] 
Dec 17 20:48:50.190 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.84s
Dec 17 20:48:51.284 INFO running `"docker" "inspect" "74c9e2aef03e9b0d5b40d06ae99fe90e391fcadc0d4cc447d8e6aa23cf3e639f"`
Dec 17 20:48:51.680 INFO running `"docker" "rm" "-f" "74c9e2aef03e9b0d5b40d06ae99fe90e391fcadc0d4cc447d8e6aa23cf3e639f"`
Dec 17 20:48:52.072 INFO [stdout] 74c9e2aef03e9b0d5b40d06ae99fe90e391fcadc0d4cc447d8e6aa23cf3e639f