Dec 17 23:07:38.479 INFO checking iThinkyouknow/rust-blockchain against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 23:07:38.479 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-1/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/iThinkyouknow/rust-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 23:07:38.973 INFO [stdout] b55019d18bb4404ff5bde12687a8ac3b052fcb9f43edeb001f7e23c56a2a716a
Dec 17 23:07:38.975 INFO running `"docker" "start" "-a" "b55019d18bb4404ff5bde12687a8ac3b052fcb9f43edeb001f7e23c56a2a716a"`
Dec 17 23:07:41.404 INFO [stderr]     Checking blockchain v0.1.0 (/opt/crater/workdir)
Dec 17 23:07:42.354 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.354 INFO [stderr]   --> src/main.rs:17:5
Dec 17 23:07:42.355 INFO [stderr]    |
Dec 17 23:07:42.355 INFO [stderr] 17 |     io::stdout().flush();
Dec 17 23:07:42.355 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.356 INFO [stderr]    |
Dec 17 23:07:42.356 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 23:07:42.356 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.356 INFO [stderr] 
Dec 17 23:07:42.357 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.357 INFO [stderr]   --> src/main.rs:18:5
Dec 17 23:07:42.357 INFO [stderr]    |
Dec 17 23:07:42.357 INFO [stderr] 18 |     io::stdin().read_line(&mut miner_addr);
Dec 17 23:07:42.357 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.358 INFO [stderr]    |
Dec 17 23:07:42.358 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.358 INFO [stderr] 
Dec 17 23:07:42.358 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.359 INFO [stderr]   --> src/main.rs:21:5
Dec 17 23:07:42.359 INFO [stderr]    |
Dec 17 23:07:42.359 INFO [stderr] 21 |     io::stdout().flush();
Dec 17 23:07:42.360 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.360 INFO [stderr]    |
Dec 17 23:07:42.360 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.360 INFO [stderr] 
Dec 17 23:07:42.361 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.361 INFO [stderr]   --> src/main.rs:22:5
Dec 17 23:07:42.361 INFO [stderr]    |
Dec 17 23:07:42.362 INFO [stderr] 22 |     io::stdin().read_line(&mut difficulty);
Dec 17 23:07:42.362 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.362 INFO [stderr]    |
Dec 17 23:07:42.362 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.363 INFO [stderr] 
Dec 17 23:07:42.363 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.363 INFO [stderr]   --> src/main.rs:39:9
Dec 17 23:07:42.363 INFO [stderr]    |
Dec 17 23:07:42.364 INFO [stderr] 39 |         io::stdout().flush();
Dec 17 23:07:42.364 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.364 INFO [stderr]    |
Dec 17 23:07:42.364 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.365 INFO [stderr] 
Dec 17 23:07:42.365 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.365 INFO [stderr]   --> src/main.rs:41:9
Dec 17 23:07:42.365 INFO [stderr]    |
Dec 17 23:07:42.365 INFO [stderr] 41 |         io::stdin().read_line(&mut choice);
Dec 17 23:07:42.366 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.366 INFO [stderr]    |
Dec 17 23:07:42.366 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.366 INFO [stderr] 
Dec 17 23:07:42.367 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.367 INFO [stderr]   --> src/main.rs:55:17
Dec 17 23:07:42.367 INFO [stderr]    |
Dec 17 23:07:42.367 INFO [stderr] 55 |                 io::stdout().flush();
Dec 17 23:07:42.368 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.368 INFO [stderr]    |
Dec 17 23:07:42.368 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.369 INFO [stderr] 
Dec 17 23:07:42.369 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.369 INFO [stderr]   --> src/main.rs:17:5
Dec 17 23:07:42.370 INFO [stderr]    |
Dec 17 23:07:42.370 INFO [stderr] 17 |     io::stdout().flush();
Dec 17 23:07:42.370 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.371 INFO [stderr]    |
Dec 17 23:07:42.371 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 23:07:42.371 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.372 INFO [stderr]   --> src/main.rs:56:17
Dec 17 23:07:42.372 INFO [stderr]    |
Dec 17 23:07:42.372 INFO [stderr] 56 |                 io::stdin().read_line(&mut sender);
Dec 17 23:07:42.372 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.373 INFO [stderr]    |
Dec 17 23:07:42.373 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.373 INFO [stderr] 
Dec 17 23:07:42.374 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.374 INFO [stderr] 
Dec 17 23:07:42.374 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.375 INFO [stderr]   --> src/main.rs:58:17
Dec 17 23:07:42.375 INFO [stderr]    |
Dec 17 23:07:42.375 INFO [stderr] 58 |                 io::stdout().flush();
Dec 17 23:07:42.376 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.376 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.376 INFO [stderr]   --> src/main.rs:18:5
Dec 17 23:07:42.377 INFO [stderr]    |
Dec 17 23:07:42.377 INFO [stderr] 18 |     io::stdin().read_line(&mut miner_addr);
Dec 17 23:07:42.377 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.378 INFO [stderr]    |
Dec 17 23:07:42.378 INFO [stderr]    |
Dec 17 23:07:42.378 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.378 INFO [stderr] 
Dec 17 23:07:42.379 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.379 INFO [stderr] 
Dec 17 23:07:42.379 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.380 INFO [stderr]   --> src/main.rs:59:17
Dec 17 23:07:42.380 INFO [stderr]    |
Dec 17 23:07:42.380 INFO [stderr] 59 |                 io::stdin().read_line(&mut receiver);
Dec 17 23:07:42.380 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.381 INFO [stderr]    |
Dec 17 23:07:42.381 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.381 INFO [stderr]   --> src/main.rs:21:5
Dec 17 23:07:42.382 INFO [stderr]    |
Dec 17 23:07:42.382 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.382 INFO [stderr] 21 |     io::stdout().flush();
Dec 17 23:07:42.382 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.382 INFO [stderr] 
Dec 17 23:07:42.383 INFO [stderr]    |
Dec 17 23:07:42.383 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.383 INFO [stderr] 
Dec 17 23:07:42.383 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.384 INFO [stderr]   --> src/main.rs:62:17
Dec 17 23:07:42.384 INFO [stderr]    |
Dec 17 23:07:42.384 INFO [stderr] 62 |                 io::stdout().flush();
Dec 17 23:07:42.384 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.385 INFO [stderr]    |
Dec 17 23:07:42.385 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.385 INFO [stderr]   --> src/main.rs:22:5
Dec 17 23:07:42.385 INFO [stderr]    |
Dec 17 23:07:42.385 INFO [stderr] 22 |     io::stdin().read_line(&mut difficulty);
Dec 17 23:07:42.386 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.386 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.386 INFO [stderr]    |
Dec 17 23:07:42.386 INFO [stderr] 
Dec 17 23:07:42.387 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.387 INFO [stderr] 
Dec 17 23:07:42.387 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.387 INFO [stderr]   --> src/main.rs:63:17
Dec 17 23:07:42.388 INFO [stderr]    |
Dec 17 23:07:42.388 INFO [stderr] 63 |                 io::stdin().read_line(&mut amount);
Dec 17 23:07:42.388 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.389 INFO [stderr]    |
Dec 17 23:07:42.389 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.389 INFO [stderr] 
Dec 17 23:07:42.390 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.390 INFO [stderr]   --> src/main.rs:39:9
Dec 17 23:07:42.390 INFO [stderr]    |
Dec 17 23:07:42.391 INFO [stderr] 39 |         io::stdout().flush();
Dec 17 23:07:42.391 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.391 INFO [stderr]    |
Dec 17 23:07:42.392 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.392 INFO [stderr] 
Dec 17 23:07:42.392 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.392 INFO [stderr]   --> src/main.rs:87:17
Dec 17 23:07:42.393 INFO [stderr]    |
Dec 17 23:07:42.393 INFO [stderr] 87 |                 io::stdout().flush();
Dec 17 23:07:42.393 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.394 INFO [stderr]    |
Dec 17 23:07:42.394 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.394 INFO [stderr]   --> src/main.rs:41:9
Dec 17 23:07:42.394 INFO [stderr]    |
Dec 17 23:07:42.395 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.395 INFO [stderr] 41 |         io::stdin().read_line(&mut choice);
Dec 17 23:07:42.395 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.396 INFO [stderr] 
Dec 17 23:07:42.396 INFO [stderr]    |
Dec 17 23:07:42.396 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.396 INFO [stderr] 
Dec 17 23:07:42.397 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.397 INFO [stderr]   --> src/main.rs:88:17
Dec 17 23:07:42.397 INFO [stderr]    |
Dec 17 23:07:42.398 INFO [stderr] 88 |                 io::stdin().read_line(&mut new_diff);
Dec 17 23:07:42.398 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.398 INFO [stderr]    |
Dec 17 23:07:42.398 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.398 INFO [stderr] 
Dec 17 23:07:42.399 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.399 INFO [stderr]   --> src/main.rs:55:17
Dec 17 23:07:42.399 INFO [stderr]    |
Dec 17 23:07:42.400 INFO [stderr] 55 |                 io::stdout().flush();
Dec 17 23:07:42.400 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.400 INFO [stderr]    |
Dec 17 23:07:42.400 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.400 INFO [stderr] 
Dec 17 23:07:42.401 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.401 INFO [stderr]   --> src/main.rs:98:17
Dec 17 23:07:42.401 INFO [stderr]    |
Dec 17 23:07:42.402 INFO [stderr] 98 |                 io::stdout().flush();
Dec 17 23:07:42.402 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.402 INFO [stderr]    |
Dec 17 23:07:42.402 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.403 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.403 INFO [stderr] 
Dec 17 23:07:42.403 INFO [stderr]   --> src/main.rs:56:17
Dec 17 23:07:42.403 INFO [stderr]    |
Dec 17 23:07:42.404 INFO [stderr] 56 |                 io::stdin().read_line(&mut sender);
Dec 17 23:07:42.404 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.404 INFO [stderr]    |
Dec 17 23:07:42.404 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.405 INFO [stderr] 
Dec 17 23:07:42.405 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.405 INFO [stderr]   --> src/main.rs:99:17
Dec 17 23:07:42.406 INFO [stderr]    |
Dec 17 23:07:42.406 INFO [stderr] 99 |                 io::stdin().read_line(&mut new_reward);
Dec 17 23:07:42.406 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.406 INFO [stderr]    |
Dec 17 23:07:42.407 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.407 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.407 INFO [stderr]   --> src/main.rs:58:17
Dec 17 23:07:42.408 INFO [stderr]    |
Dec 17 23:07:42.408 INFO [stderr] 
Dec 17 23:07:42.408 INFO [stderr] 58 |                 io::stdout().flush();
Dec 17 23:07:42.408 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.409 INFO [stderr]    |
Dec 17 23:07:42.409 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.409 INFO [stderr] 
Dec 17 23:07:42.409 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.410 INFO [stderr]   --> src/main.rs:59:17
Dec 17 23:07:42.410 INFO [stderr]    |
Dec 17 23:07:42.410 INFO [stderr] 59 |                 io::stdin().read_line(&mut receiver);
Dec 17 23:07:42.411 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.411 INFO [stderr]    |
Dec 17 23:07:42.411 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.411 INFO [stderr] 
Dec 17 23:07:42.411 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.412 INFO [stderr]   --> src/main.rs:62:17
Dec 17 23:07:42.412 INFO [stderr]    |
Dec 17 23:07:42.412 INFO [stderr] 62 |                 io::stdout().flush();
Dec 17 23:07:42.412 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.413 INFO [stderr]    |
Dec 17 23:07:42.413 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.413 INFO [stderr] 
Dec 17 23:07:42.413 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.414 INFO [stderr]   --> src/main.rs:63:17
Dec 17 23:07:42.414 INFO [stderr]    |
Dec 17 23:07:42.414 INFO [stderr] 63 |                 io::stdin().read_line(&mut amount);
Dec 17 23:07:42.415 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.415 INFO [stderr]    |
Dec 17 23:07:42.415 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.415 INFO [stderr] 
Dec 17 23:07:42.416 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.416 INFO [stderr]   --> src/main.rs:87:17
Dec 17 23:07:42.416 INFO [stderr]    |
Dec 17 23:07:42.417 INFO [stderr] 87 |                 io::stdout().flush();
Dec 17 23:07:42.417 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.417 INFO [stderr]    |
Dec 17 23:07:42.418 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.418 INFO [stderr] 
Dec 17 23:07:42.418 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.418 INFO [stderr]   --> src/main.rs:88:17
Dec 17 23:07:42.419 INFO [stderr]    |
Dec 17 23:07:42.419 INFO [stderr] 88 |                 io::stdin().read_line(&mut new_diff);
Dec 17 23:07:42.419 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.419 INFO [stderr]    |
Dec 17 23:07:42.420 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.420 INFO [stderr] 
Dec 17 23:07:42.420 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.420 INFO [stderr]   --> src/main.rs:98:17
Dec 17 23:07:42.421 INFO [stderr]    |
Dec 17 23:07:42.421 INFO [stderr] 98 |                 io::stdout().flush();
Dec 17 23:07:42.421 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.421 INFO [stderr]    |
Dec 17 23:07:42.422 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.422 INFO [stderr] 
Dec 17 23:07:42.422 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:07:42.422 INFO [stderr]   --> src/main.rs:99:17
Dec 17 23:07:42.423 INFO [stderr]    |
Dec 17 23:07:42.423 INFO [stderr] 99 |                 io::stdin().read_line(&mut new_reward);
Dec 17 23:07:42.423 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:07:42.424 INFO [stderr]    |
Dec 17 23:07:42.424 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:07:42.424 INFO [stderr] 
Dec 17 23:07:42.425 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.09s
Dec 17 23:07:43.749 INFO running `"docker" "inspect" "b55019d18bb4404ff5bde12687a8ac3b052fcb9f43edeb001f7e23c56a2a716a"`
Dec 17 23:07:44.110 INFO running `"docker" "rm" "-f" "b55019d18bb4404ff5bde12687a8ac3b052fcb9f43edeb001f7e23c56a2a716a"`
Dec 17 23:07:44.368 INFO [stdout] b55019d18bb4404ff5bde12687a8ac3b052fcb9f43edeb001f7e23c56a2a716a