Dec 18 08:28:41.326 INFO checking AvishaiW/toy-blochain-rust against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 08:28:41.326 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-5/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/AvishaiW/toy-blochain-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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 08:28:41.660 INFO [stdout] 1ef7a34187ededcd6ffe892ccee1f546eb5f8e25e15411275bf6cffefe14f97f
Dec 18 08:28:41.662 INFO running `"docker" "start" "-a" "1ef7a34187ededcd6ffe892ccee1f546eb5f8e25e15411275bf6cffefe14f97f"`
Dec 18 08:28:42.582 INFO [stderr]     Checking byteorder v1.2.6
Dec 18 08:28:43.007 INFO [stderr]     Checking block-buffer v0.7.0
Dec 18 08:28:43.240 INFO [stderr]     Checking sha2 v0.8.0
Dec 18 08:28:43.784 INFO [stderr]     Checking blockchain v0.1.0 (/opt/crater/workdir)
Dec 18 08:28:44.533 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.533 INFO [stderr]   --> src/main.rs:16:5
Dec 18 08:28:44.533 INFO [stderr]    |
Dec 18 08:28:44.533 INFO [stderr] 16 |     io::stdout().flush();
Dec 18 08:28:44.533 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.533 INFO [stderr]    |
Dec 18 08:28:44.533 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 08:28:44.533 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.533 INFO [stderr] 
Dec 18 08:28:44.533 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.533 INFO [stderr]   --> src/main.rs:17:5
Dec 18 08:28:44.533 INFO [stderr]    |
Dec 18 08:28:44.533 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_addr);
Dec 18 08:28:44.533 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.533 INFO [stderr]    |
Dec 18 08:28:44.533 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.533 INFO [stderr] 
Dec 18 08:28:44.533 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.533 INFO [stderr]   --> src/main.rs:19:5
Dec 18 08:28:44.533 INFO [stderr]    |
Dec 18 08:28:44.533 INFO [stderr] 19 |     io::stdout().flush();
Dec 18 08:28:44.533 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.533 INFO [stderr]    |
Dec 18 08:28:44.533 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.533 INFO [stderr] 
Dec 18 08:28:44.533 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.533 INFO [stderr]   --> src/main.rs:20:5
Dec 18 08:28:44.533 INFO [stderr]    |
Dec 18 08:28:44.533 INFO [stderr] 20 |     io::stdin().read_line(&mut difficulty);
Dec 18 08:28:44.533 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.533 INFO [stderr]    |
Dec 18 08:28:44.533 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.534 INFO [stderr] 
Dec 18 08:28:44.534 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.534 INFO [stderr]   --> src/main.rs:33:9
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr] 33 |         io::stdout().flush();
Dec 18 08:28:44.534 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.534 INFO [stderr] 
Dec 18 08:28:44.534 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.534 INFO [stderr]   --> src/main.rs:35:9
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr] 35 |         io::stdin().read_line(&mut choice);
Dec 18 08:28:44.534 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.534 INFO [stderr] 
Dec 18 08:28:44.534 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.534 INFO [stderr]   --> src/main.rs:50:17
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr] 50 |                 io::stdout().flush();
Dec 18 08:28:44.534 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.534 INFO [stderr] 
Dec 18 08:28:44.534 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.534 INFO [stderr]   --> src/main.rs:51:17
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr] 51 |                 io::stdin().read_line(&mut sender);
Dec 18 08:28:44.534 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.534 INFO [stderr] 
Dec 18 08:28:44.534 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.534 INFO [stderr]   --> src/main.rs:53:17
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr] 53 |                 io::stdout().flush();
Dec 18 08:28:44.534 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.534 INFO [stderr] 
Dec 18 08:28:44.534 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.534 INFO [stderr]   --> src/main.rs:54:17
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr] 54 |                 io::stdin().read_line(&mut receiver);
Dec 18 08:28:44.534 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.534 INFO [stderr] 
Dec 18 08:28:44.534 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.534 INFO [stderr]   --> src/main.rs:56:17
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr] 56 |                 io::stdout().flush();
Dec 18 08:28:44.534 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.534 INFO [stderr] 
Dec 18 08:28:44.534 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.534 INFO [stderr]   --> src/main.rs:57:17
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr] 57 |                 io::stdin().read_line(&mut amount);
Dec 18 08:28:44.534 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.534 INFO [stderr] 
Dec 18 08:28:44.534 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.534 INFO [stderr]   --> src/main.rs:81:21
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr] 81 |                     io::stdout().flush();
Dec 18 08:28:44.534 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.534 INFO [stderr] 
Dec 18 08:28:44.534 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.534 INFO [stderr]   --> src/main.rs:82:21
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr] 82 |                     io::stdin().read_line(&mut new_diff);
Dec 18 08:28:44.534 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.534 INFO [stderr] 
Dec 18 08:28:44.534 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.534 INFO [stderr]   --> src/main.rs:92:17
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr] 92 |                 io::stdout().flush();
Dec 18 08:28:44.534 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.534 INFO [stderr]    |
Dec 18 08:28:44.534 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.534 INFO [stderr] 
Dec 18 08:28:44.535 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.535 INFO [stderr]   --> src/main.rs:93:17
Dec 18 08:28:44.535 INFO [stderr]    |
Dec 18 08:28:44.535 INFO [stderr] 93 |                 io::stdin().read_line(&mut new_reward);
Dec 18 08:28:44.535 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.535 INFO [stderr]    |
Dec 18 08:28:44.535 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.535 INFO [stderr] 
Dec 18 08:28:44.588 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.588 INFO [stderr]   --> src/main.rs:16:5
Dec 18 08:28:44.588 INFO [stderr]    |
Dec 18 08:28:44.588 INFO [stderr] 16 |     io::stdout().flush();
Dec 18 08:28:44.588 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.588 INFO [stderr]    |
Dec 18 08:28:44.588 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 08:28:44.588 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.588 INFO [stderr] 
Dec 18 08:28:44.588 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.588 INFO [stderr]   --> src/main.rs:17:5
Dec 18 08:28:44.588 INFO [stderr]    |
Dec 18 08:28:44.588 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_addr);
Dec 18 08:28:44.588 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.588 INFO [stderr]    |
Dec 18 08:28:44.588 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.588 INFO [stderr] 
Dec 18 08:28:44.588 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.588 INFO [stderr]   --> src/main.rs:19:5
Dec 18 08:28:44.588 INFO [stderr]    |
Dec 18 08:28:44.588 INFO [stderr] 19 |     io::stdout().flush();
Dec 18 08:28:44.588 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.588 INFO [stderr]    |
Dec 18 08:28:44.588 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.588 INFO [stderr] 
Dec 18 08:28:44.588 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.588 INFO [stderr]   --> src/main.rs:20:5
Dec 18 08:28:44.588 INFO [stderr]    |
Dec 18 08:28:44.588 INFO [stderr] 20 |     io::stdin().read_line(&mut difficulty);
Dec 18 08:28:44.588 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.588 INFO [stderr]    |
Dec 18 08:28:44.588 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.588 INFO [stderr] 
Dec 18 08:28:44.588 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.588 INFO [stderr]   --> src/main.rs:33:9
Dec 18 08:28:44.588 INFO [stderr]    |
Dec 18 08:28:44.588 INFO [stderr] 33 |         io::stdout().flush();
Dec 18 08:28:44.588 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.588 INFO [stderr]    |
Dec 18 08:28:44.588 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.588 INFO [stderr] 
Dec 18 08:28:44.588 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.589 INFO [stderr]   --> src/main.rs:35:9
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr] 35 |         io::stdin().read_line(&mut choice);
Dec 18 08:28:44.589 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.589 INFO [stderr] 
Dec 18 08:28:44.589 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.589 INFO [stderr]   --> src/main.rs:50:17
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr] 50 |                 io::stdout().flush();
Dec 18 08:28:44.589 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.589 INFO [stderr] 
Dec 18 08:28:44.589 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.589 INFO [stderr]   --> src/main.rs:51:17
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr] 51 |                 io::stdin().read_line(&mut sender);
Dec 18 08:28:44.589 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.589 INFO [stderr] 
Dec 18 08:28:44.589 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.589 INFO [stderr]   --> src/main.rs:53:17
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr] 53 |                 io::stdout().flush();
Dec 18 08:28:44.589 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.589 INFO [stderr] 
Dec 18 08:28:44.589 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.589 INFO [stderr]   --> src/main.rs:54:17
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr] 54 |                 io::stdin().read_line(&mut receiver);
Dec 18 08:28:44.589 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.589 INFO [stderr] 
Dec 18 08:28:44.589 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.589 INFO [stderr]   --> src/main.rs:56:17
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr] 56 |                 io::stdout().flush();
Dec 18 08:28:44.589 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.589 INFO [stderr] 
Dec 18 08:28:44.589 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.589 INFO [stderr]   --> src/main.rs:57:17
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr] 57 |                 io::stdin().read_line(&mut amount);
Dec 18 08:28:44.589 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.589 INFO [stderr] 
Dec 18 08:28:44.589 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.589 INFO [stderr]   --> src/main.rs:81:21
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr] 81 |                     io::stdout().flush();
Dec 18 08:28:44.589 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.589 INFO [stderr] 
Dec 18 08:28:44.589 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.589 INFO [stderr]   --> src/main.rs:82:21
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr] 82 |                     io::stdin().read_line(&mut new_diff);
Dec 18 08:28:44.589 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.589 INFO [stderr] 
Dec 18 08:28:44.589 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.589 INFO [stderr]   --> src/main.rs:92:17
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr] 92 |                 io::stdout().flush();
Dec 18 08:28:44.589 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.589 INFO [stderr]    |
Dec 18 08:28:44.589 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.589 INFO [stderr] 
Dec 18 08:28:44.589 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:44.590 INFO [stderr]   --> src/main.rs:93:17
Dec 18 08:28:44.590 INFO [stderr]    |
Dec 18 08:28:44.590 INFO [stderr] 93 |                 io::stdin().read_line(&mut new_reward);
Dec 18 08:28:44.590 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:44.590 INFO [stderr]    |
Dec 18 08:28:44.590 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:44.590 INFO [stderr] 
Dec 18 08:28:44.608 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.10s
Dec 18 08:28:44.902 INFO running `"docker" "inspect" "1ef7a34187ededcd6ffe892ccee1f546eb5f8e25e15411275bf6cffefe14f97f"`
Dec 18 08:28:45.024 INFO running `"docker" "rm" "-f" "1ef7a34187ededcd6ffe892ccee1f546eb5f8e25e15411275bf6cffefe14f97f"`
Dec 18 08:28:45.087 INFO [stdout] 1ef7a34187ededcd6ffe892ccee1f546eb5f8e25e15411275bf6cffefe14f97f