Dec 04 06:31:44.140 INFO checking yogesum/blockchain-rs against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 06:31:44.141 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-5/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/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 +1df97983eb2057dc6a8f7eb364e263b51ae23230-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 04 06:31:44.651 INFO [stdout] 1612cbee0f6f572e6c2be48771a69bee13739dd8baf79a1ab165760d38092cd5
Dec 04 06:31:44.653 INFO running `"docker" "start" "-a" "1612cbee0f6f572e6c2be48771a69bee13739dd8baf79a1ab165760d38092cd5"`
Dec 04 06:31:45.850 INFO [stderr] usermod: no changes
Dec 04 06:31:45.967 INFO [stderr]     Checking arrayref v0.3.4
Dec 04 06:31:45.967 INFO [stderr]     Checking serde v1.0.37
Dec 04 06:31:45.967 INFO [stderr]     Checking num-traits v0.2.2
Dec 04 06:31:45.975 INFO [stderr]    Compiling proc-macro2 v0.3.1
Dec 04 06:31:45.979 INFO [stderr]     Checking time v0.1.39
Dec 04 06:31:45.979 INFO [stderr]     Checking digest v0.7.2
Dec 04 06:31:46.287 INFO [stderr]     Checking block-buffer v0.3.3
Dec 04 06:31:47.151 INFO [stderr]     Checking sha2 v0.7.0
Dec 04 06:31:51.596 INFO [stderr]    Compiling quote v0.5.1
Dec 04 06:31:52.850 INFO [stderr]    Compiling syn v0.13.1
Dec 04 06:32:05.079 INFO [stderr]    Compiling serde_derive_internals v0.23.0
Dec 04 06:32:10.631 INFO [stderr]    Compiling serde_derive v1.0.37
Dec 04 06:32:11.671 INFO [stderr]     Checking serde_json v1.0.13
Dec 04 06:32:22.780 INFO [stderr]     Checking blockchain-rs v0.1.0 (/source)
Dec 04 06:32:23.479 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.479 INFO [stderr]   --> src/main.rs:16:5
Dec 04 06:32:23.479 INFO [stderr]    |
Dec 04 06:32:23.480 INFO [stderr] 16 |     io::stdout().flush();
Dec 04 06:32:23.480 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.480 INFO [stderr]    |
Dec 04 06:32:23.480 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 04 06:32:23.480 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.480 INFO [stderr] 
Dec 04 06:32:23.480 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.480 INFO [stderr]   --> src/main.rs:17:5
Dec 04 06:32:23.481 INFO [stderr]    |
Dec 04 06:32:23.481 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_addr);
Dec 04 06:32:23.481 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.481 INFO [stderr]    |
Dec 04 06:32:23.481 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.481 INFO [stderr] 
Dec 04 06:32:23.481 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.481 INFO [stderr]   --> src/main.rs:20:5
Dec 04 06:32:23.481 INFO [stderr]    |
Dec 04 06:32:23.481 INFO [stderr] 20 |     io::stdout().flush();
Dec 04 06:32:23.481 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.481 INFO [stderr]    |
Dec 04 06:32:23.481 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.481 INFO [stderr] 
Dec 04 06:32:23.481 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.481 INFO [stderr]   --> src/main.rs:21:5
Dec 04 06:32:23.481 INFO [stderr]    |
Dec 04 06:32:23.481 INFO [stderr] 21 |     io::stdin().read_line(&mut difficulty);
Dec 04 06:32:23.481 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.481 INFO [stderr]    |
Dec 04 06:32:23.482 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.482 INFO [stderr] 
Dec 04 06:32:23.499 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.499 INFO [stderr]   --> src/main.rs:16:5
Dec 04 06:32:23.499 INFO [stderr]    |
Dec 04 06:32:23.499 INFO [stderr] 16 |     io::stdout().flush();
Dec 04 06:32:23.499 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.499 INFO [stderr]    |
Dec 04 06:32:23.499 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 04 06:32:23.499 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.499 INFO [stderr] 
Dec 04 06:32:23.499 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.500 INFO [stderr]   --> src/main.rs:17:5
Dec 04 06:32:23.500 INFO [stderr]    |
Dec 04 06:32:23.500 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_addr);
Dec 04 06:32:23.500 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.500 INFO [stderr]    |
Dec 04 06:32:23.501 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.501 INFO [stderr] 
Dec 04 06:32:23.501 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.501 INFO [stderr]   --> src/main.rs:20:5
Dec 04 06:32:23.501 INFO [stderr]    |
Dec 04 06:32:23.501 INFO [stderr] 20 |     io::stdout().flush();
Dec 04 06:32:23.501 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.501 INFO [stderr]    |
Dec 04 06:32:23.501 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.501 INFO [stderr] 
Dec 04 06:32:23.502 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.502 INFO [stderr]   --> src/main.rs:21:5
Dec 04 06:32:23.502 INFO [stderr]    |
Dec 04 06:32:23.502 INFO [stderr] 21 |     io::stdin().read_line(&mut difficulty);
Dec 04 06:32:23.502 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.502 INFO [stderr]    |
Dec 04 06:32:23.502 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.502 INFO [stderr] 
Dec 04 06:32:23.502 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.502 INFO [stderr]   --> src/main.rs:38:9
Dec 04 06:32:23.502 INFO [stderr]    |
Dec 04 06:32:23.502 INFO [stderr] 38 |         io::stdout().flush();
Dec 04 06:32:23.502 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.503 INFO [stderr]    |
Dec 04 06:32:23.503 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.503 INFO [stderr] 
Dec 04 06:32:23.503 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.503 INFO [stderr]   --> src/main.rs:41:9
Dec 04 06:32:23.503 INFO [stderr]    |
Dec 04 06:32:23.503 INFO [stderr] 41 |         io::stdin().read_line(&mut choice);
Dec 04 06:32:23.503 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.503 INFO [stderr]    |
Dec 04 06:32:23.503 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.503 INFO [stderr] 
Dec 04 06:32:23.503 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.503 INFO [stderr]   --> src/main.rs:55:17
Dec 04 06:32:23.504 INFO [stderr]    |
Dec 04 06:32:23.504 INFO [stderr] 55 |                 io::stdout().flush();
Dec 04 06:32:23.504 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.504 INFO [stderr]    |
Dec 04 06:32:23.504 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.504 INFO [stderr] 
Dec 04 06:32:23.504 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.504 INFO [stderr]   --> src/main.rs:56:17
Dec 04 06:32:23.504 INFO [stderr]    |
Dec 04 06:32:23.504 INFO [stderr] 56 |                 io::stdin().read_line(&mut sender);
Dec 04 06:32:23.504 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.504 INFO [stderr]    |
Dec 04 06:32:23.504 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.504 INFO [stderr] 
Dec 04 06:32:23.505 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.505 INFO [stderr]   --> src/main.rs:59:17
Dec 04 06:32:23.505 INFO [stderr]    |
Dec 04 06:32:23.505 INFO [stderr] 59 |                 io::stdout().flush();
Dec 04 06:32:23.505 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.505 INFO [stderr]    |
Dec 04 06:32:23.505 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.505 INFO [stderr] 
Dec 04 06:32:23.505 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.505 INFO [stderr]   --> src/main.rs:60:17
Dec 04 06:32:23.505 INFO [stderr]    |
Dec 04 06:32:23.505 INFO [stderr] 60 |                 io::stdin().read_line(&mut receiver);
Dec 04 06:32:23.506 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.506 INFO [stderr]    |
Dec 04 06:32:23.506 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.506 INFO [stderr] 
Dec 04 06:32:23.506 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.506 INFO [stderr]   --> src/main.rs:63:17
Dec 04 06:32:23.506 INFO [stderr]    |
Dec 04 06:32:23.506 INFO [stderr] 63 |                 io::stdout().flush();
Dec 04 06:32:23.506 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.506 INFO [stderr]    |
Dec 04 06:32:23.506 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.506 INFO [stderr] 
Dec 04 06:32:23.507 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.507 INFO [stderr]   --> src/main.rs:64:17
Dec 04 06:32:23.507 INFO [stderr]    |
Dec 04 06:32:23.507 INFO [stderr] 64 |                 io::stdin().read_line(&mut amount);
Dec 04 06:32:23.507 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.507 INFO [stderr]    |
Dec 04 06:32:23.507 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.507 INFO [stderr] 
Dec 04 06:32:23.507 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.507 INFO [stderr]   --> src/main.rs:89:17
Dec 04 06:32:23.507 INFO [stderr]    |
Dec 04 06:32:23.507 INFO [stderr] 89 |                 io::stdout().flush();
Dec 04 06:32:23.508 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.508 INFO [stderr]    |
Dec 04 06:32:23.508 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.508 INFO [stderr] 
Dec 04 06:32:23.508 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.508 INFO [stderr]   --> src/main.rs:90:17
Dec 04 06:32:23.508 INFO [stderr]    |
Dec 04 06:32:23.508 INFO [stderr] 90 |                 io::stdin().read_line(&mut new_diff);
Dec 04 06:32:23.508 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.508 INFO [stderr]    |
Dec 04 06:32:23.508 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.508 INFO [stderr] 
Dec 04 06:32:23.508 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.508 INFO [stderr]    --> src/main.rs:101:17
Dec 04 06:32:23.508 INFO [stderr]     |
Dec 04 06:32:23.508 INFO [stderr] 101 |                 io::stdout().flush();
Dec 04 06:32:23.508 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.508 INFO [stderr]     |
Dec 04 06:32:23.508 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.508 INFO [stderr] 
Dec 04 06:32:23.508 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.508 INFO [stderr]    --> src/main.rs:102:17
Dec 04 06:32:23.508 INFO [stderr]     |
Dec 04 06:32:23.509 INFO [stderr] 102 |                 io::stdin().read_line(&mut new_reward);
Dec 04 06:32:23.509 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.509 INFO [stderr]     |
Dec 04 06:32:23.510 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.510 INFO [stderr] 
Dec 04 06:32:23.510 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.510 INFO [stderr]   --> src/main.rs:38:9
Dec 04 06:32:23.511 INFO [stderr]    |
Dec 04 06:32:23.511 INFO [stderr] 38 |         io::stdout().flush();
Dec 04 06:32:23.511 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.511 INFO [stderr]    |
Dec 04 06:32:23.512 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.512 INFO [stderr] 
Dec 04 06:32:23.512 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.512 INFO [stderr]   --> src/main.rs:41:9
Dec 04 06:32:23.513 INFO [stderr]    |
Dec 04 06:32:23.513 INFO [stderr] 41 |         io::stdin().read_line(&mut choice);
Dec 04 06:32:23.513 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.514 INFO [stderr]    |
Dec 04 06:32:23.514 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.514 INFO [stderr] 
Dec 04 06:32:23.514 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.515 INFO [stderr]   --> src/main.rs:55:17
Dec 04 06:32:23.515 INFO [stderr]    |
Dec 04 06:32:23.515 INFO [stderr] 55 |                 io::stdout().flush();
Dec 04 06:32:23.515 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.516 INFO [stderr]    |
Dec 04 06:32:23.516 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.516 INFO [stderr] 
Dec 04 06:32:23.516 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.517 INFO [stderr]   --> src/main.rs:56:17
Dec 04 06:32:23.517 INFO [stderr]    |
Dec 04 06:32:23.517 INFO [stderr] 56 |                 io::stdin().read_line(&mut sender);
Dec 04 06:32:23.517 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.518 INFO [stderr]    |
Dec 04 06:32:23.518 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.518 INFO [stderr] 
Dec 04 06:32:23.518 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.519 INFO [stderr]   --> src/main.rs:59:17
Dec 04 06:32:23.519 INFO [stderr]    |
Dec 04 06:32:23.519 INFO [stderr] 59 |                 io::stdout().flush();
Dec 04 06:32:23.519 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.520 INFO [stderr]    |
Dec 04 06:32:23.520 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.520 INFO [stderr] 
Dec 04 06:32:23.520 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.520 INFO [stderr]   --> src/main.rs:60:17
Dec 04 06:32:23.521 INFO [stderr]    |
Dec 04 06:32:23.521 INFO [stderr] 60 |                 io::stdin().read_line(&mut receiver);
Dec 04 06:32:23.521 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.521 INFO [stderr]    |
Dec 04 06:32:23.522 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.522 INFO [stderr] 
Dec 04 06:32:23.522 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.522 INFO [stderr]   --> src/main.rs:63:17
Dec 04 06:32:23.523 INFO [stderr]    |
Dec 04 06:32:23.523 INFO [stderr] 63 |                 io::stdout().flush();
Dec 04 06:32:23.523 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.524 INFO [stderr]    |
Dec 04 06:32:23.524 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.524 INFO [stderr] 
Dec 04 06:32:23.524 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.524 INFO [stderr]   --> src/main.rs:64:17
Dec 04 06:32:23.525 INFO [stderr]    |
Dec 04 06:32:23.525 INFO [stderr] 64 |                 io::stdin().read_line(&mut amount);
Dec 04 06:32:23.525 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.526 INFO [stderr]    |
Dec 04 06:32:23.526 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.526 INFO [stderr] 
Dec 04 06:32:23.526 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.527 INFO [stderr]   --> src/main.rs:89:17
Dec 04 06:32:23.527 INFO [stderr]    |
Dec 04 06:32:23.527 INFO [stderr] 89 |                 io::stdout().flush();
Dec 04 06:32:23.528 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.528 INFO [stderr]    |
Dec 04 06:32:23.528 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.528 INFO [stderr] 
Dec 04 06:32:23.529 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.529 INFO [stderr]   --> src/main.rs:90:17
Dec 04 06:32:23.529 INFO [stderr]    |
Dec 04 06:32:23.529 INFO [stderr] 90 |                 io::stdin().read_line(&mut new_diff);
Dec 04 06:32:23.530 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.530 INFO [stderr]    |
Dec 04 06:32:23.530 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.531 INFO [stderr] 
Dec 04 06:32:23.531 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.531 INFO [stderr]    --> src/main.rs:101:17
Dec 04 06:32:23.531 INFO [stderr]     |
Dec 04 06:32:23.531 INFO [stderr] 101 |                 io::stdout().flush();
Dec 04 06:32:23.532 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.532 INFO [stderr]     |
Dec 04 06:32:23.532 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.532 INFO [stderr] 
Dec 04 06:32:23.532 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 06:32:23.533 INFO [stderr]    --> src/main.rs:102:17
Dec 04 06:32:23.533 INFO [stderr]     |
Dec 04 06:32:23.533 INFO [stderr] 102 |                 io::stdin().read_line(&mut new_reward);
Dec 04 06:32:23.533 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 06:32:23.534 INFO [stderr]     |
Dec 04 06:32:23.534 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 06:32:23.534 INFO [stderr] 
Dec 04 06:32:23.563 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 37.68s
Dec 04 06:32:23.580 INFO [stderr] su: No module specific data is present
Dec 04 06:32:24.960 INFO running `"docker" "inspect" "1612cbee0f6f572e6c2be48771a69bee13739dd8baf79a1ab165760d38092cd5"`
Dec 04 06:32:25.325 INFO running `"docker" "rm" "-f" "1612cbee0f6f572e6c2be48771a69bee13739dd8baf79a1ab165760d38092cd5"`
Dec 04 06:32:25.647 INFO [stdout] 1612cbee0f6f572e6c2be48771a69bee13739dd8baf79a1ab165760d38092cd5