Nov 28 01:52:24.318 INFO checking lempiy/blockchain against master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5 for pr-56074
Nov 28 01:52:24.319 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-7/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56074/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/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 +0b9f19dff1347e29bf4362ab5a8fab84b43023b5-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"`
Nov 28 01:52:24.814 INFO [stdout] a3a2a7f22a5ed815dc667d08ece22c0cf048e6e496c6f85f9b45e6b6cad02642
Nov 28 01:52:24.816 INFO running `"docker" "start" "-a" "a3a2a7f22a5ed815dc667d08ece22c0cf048e6e496c6f85f9b45e6b6cad02642"`
Nov 28 01:52:26.707 INFO [stderr] usermod: no changes
Nov 28 01:52:26.844 INFO [stderr]     Checking serde v1.0.38
Nov 28 01:52:26.868 INFO [stderr]    Compiling serde_derive_internals v0.23.1
Nov 28 01:52:26.868 INFO [stderr]     Checking sha2 v0.7.0
Nov 28 01:52:35.696 INFO [stderr]    Compiling serde_derive v1.0.38
Nov 28 01:52:46.064 INFO [stderr]     Checking serde_json v1.0.14
Nov 28 01:52:52.145 INFO [stderr]     Checking blockchain v0.1.0 (/source)
Nov 28 01:52:53.437 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.438 INFO [stderr]   --> src/main.rs:16:5
Nov 28 01:52:53.438 INFO [stderr]    |
Nov 28 01:52:53.438 INFO [stderr] 16 |     io::stdout().flush();
Nov 28 01:52:53.438 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.439 INFO [stderr]    |
Nov 28 01:52:53.439 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 28 01:52:53.439 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.440 INFO [stderr] 
Nov 28 01:52:53.440 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.440 INFO [stderr]   --> src/main.rs:17:5
Nov 28 01:52:53.440 INFO [stderr]    |
Nov 28 01:52:53.441 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_addr);
Nov 28 01:52:53.441 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.441 INFO [stderr]    |
Nov 28 01:52:53.441 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.442 INFO [stderr] 
Nov 28 01:52:53.442 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.442 INFO [stderr]   --> src/main.rs:20:5
Nov 28 01:52:53.442 INFO [stderr]    |
Nov 28 01:52:53.443 INFO [stderr] 20 |     io::stdout().flush();
Nov 28 01:52:53.443 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.443 INFO [stderr]    |
Nov 28 01:52:53.443 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.444 INFO [stderr] 
Nov 28 01:52:53.444 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.444 INFO [stderr]   --> src/main.rs:21:5
Nov 28 01:52:53.444 INFO [stderr]    |
Nov 28 01:52:53.445 INFO [stderr] 21 |     io::stdin().read_line(&mut difficulty);
Nov 28 01:52:53.445 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.445 INFO [stderr]    |
Nov 28 01:52:53.446 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.446 INFO [stderr] 
Nov 28 01:52:53.446 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.446 INFO [stderr]   --> src/main.rs:36:9
Nov 28 01:52:53.447 INFO [stderr]    |
Nov 28 01:52:53.447 INFO [stderr] 36 |         io::stdout().flush();
Nov 28 01:52:53.447 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.447 INFO [stderr]    |
Nov 28 01:52:53.448 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.448 INFO [stderr] 
Nov 28 01:52:53.448 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.449 INFO [stderr]   --> src/main.rs:38:9
Nov 28 01:52:53.449 INFO [stderr]    |
Nov 28 01:52:53.449 INFO [stderr] 38 |         io::stdin().read_line(&mut choice);
Nov 28 01:52:53.449 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.450 INFO [stderr]    |
Nov 28 01:52:53.450 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.450 INFO [stderr] 
Nov 28 01:52:53.451 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.451 INFO [stderr]   --> src/main.rs:54:17
Nov 28 01:52:53.451 INFO [stderr]    |
Nov 28 01:52:53.451 INFO [stderr] 54 |                 io::stdout().flush();
Nov 28 01:52:53.452 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.452 INFO [stderr]    |
Nov 28 01:52:53.452 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.452 INFO [stderr] 
Nov 28 01:52:53.453 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.453 INFO [stderr]   --> src/main.rs:55:17
Nov 28 01:52:53.453 INFO [stderr]    |
Nov 28 01:52:53.454 INFO [stderr] 55 |                 io::stdin().read_line(&mut sender);
Nov 28 01:52:53.454 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.454 INFO [stderr]    |
Nov 28 01:52:53.455 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.455 INFO [stderr] 
Nov 28 01:52:53.455 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.455 INFO [stderr]   --> src/main.rs:58:17
Nov 28 01:52:53.456 INFO [stderr]    |
Nov 28 01:52:53.456 INFO [stderr] 58 |                 io::stdout().flush();
Nov 28 01:52:53.456 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.456 INFO [stderr]    |
Nov 28 01:52:53.456 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.456 INFO [stderr] 
Nov 28 01:52:53.456 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.456 INFO [stderr]   --> src/main.rs:59:17
Nov 28 01:52:53.456 INFO [stderr]    |
Nov 28 01:52:53.456 INFO [stderr] 59 |                 io::stdin().read_line(&mut reciever);
Nov 28 01:52:53.456 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.456 INFO [stderr]    |
Nov 28 01:52:53.456 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.456 INFO [stderr] 
Nov 28 01:52:53.456 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.456 INFO [stderr]   --> src/main.rs:62:17
Nov 28 01:52:53.456 INFO [stderr]    |
Nov 28 01:52:53.456 INFO [stderr] 62 |                 io::stdout().flush();
Nov 28 01:52:53.456 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.456 INFO [stderr]    |
Nov 28 01:52:53.456 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.456 INFO [stderr] 
Nov 28 01:52:53.456 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.456 INFO [stderr]   --> src/main.rs:63:17
Nov 28 01:52:53.456 INFO [stderr]    |
Nov 28 01:52:53.457 INFO [stderr] 63 |                 io::stdin().read_line(&mut amount);
Nov 28 01:52:53.457 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.457 INFO [stderr]    |
Nov 28 01:52:53.457 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.457 INFO [stderr] 
Nov 28 01:52:53.457 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.457 INFO [stderr]   --> src/main.rs:85:17
Nov 28 01:52:53.457 INFO [stderr]    |
Nov 28 01:52:53.457 INFO [stderr] 85 |                 io::stdout().flush();
Nov 28 01:52:53.457 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.457 INFO [stderr]    |
Nov 28 01:52:53.457 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.457 INFO [stderr] 
Nov 28 01:52:53.457 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.457 INFO [stderr]   --> src/main.rs:86:17
Nov 28 01:52:53.457 INFO [stderr]    |
Nov 28 01:52:53.457 INFO [stderr] 86 |                 io::stdin().read_line(&mut new_diff);
Nov 28 01:52:53.457 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.457 INFO [stderr]    |
Nov 28 01:52:53.457 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.457 INFO [stderr] 
Nov 28 01:52:53.457 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.457 INFO [stderr]   --> src/main.rs:96:17
Nov 28 01:52:53.457 INFO [stderr]    |
Nov 28 01:52:53.457 INFO [stderr] 96 |                 io::stdout().flush();
Nov 28 01:52:53.457 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.457 INFO [stderr]    |
Nov 28 01:52:53.457 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.457 INFO [stderr] 
Nov 28 01:52:53.457 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.457 INFO [stderr]   --> src/main.rs:97:17
Nov 28 01:52:53.457 INFO [stderr]    |
Nov 28 01:52:53.457 INFO [stderr] 97 |                 io::stdin().read_line(&mut new_reward);
Nov 28 01:52:53.457 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.457 INFO [stderr]    |
Nov 28 01:52:53.457 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.457 INFO [stderr] 
Nov 28 01:52:53.560 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.560 INFO [stderr]   --> src/main.rs:16:5
Nov 28 01:52:53.560 INFO [stderr]    |
Nov 28 01:52:53.560 INFO [stderr] 16 |     io::stdout().flush();
Nov 28 01:52:53.561 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.561 INFO [stderr]    |
Nov 28 01:52:53.561 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 28 01:52:53.561 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.561 INFO [stderr] 
Nov 28 01:52:53.561 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.561 INFO [stderr]   --> src/main.rs:17:5
Nov 28 01:52:53.561 INFO [stderr]    |
Nov 28 01:52:53.561 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_addr);
Nov 28 01:52:53.561 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.561 INFO [stderr]    |
Nov 28 01:52:53.561 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.561 INFO [stderr] 
Nov 28 01:52:53.561 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.561 INFO [stderr]   --> src/main.rs:20:5
Nov 28 01:52:53.561 INFO [stderr]    |
Nov 28 01:52:53.561 INFO [stderr] 20 |     io::stdout().flush();
Nov 28 01:52:53.561 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.561 INFO [stderr]    |
Nov 28 01:52:53.561 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.561 INFO [stderr] 
Nov 28 01:52:53.561 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.561 INFO [stderr]   --> src/main.rs:21:5
Nov 28 01:52:53.561 INFO [stderr]    |
Nov 28 01:52:53.561 INFO [stderr] 21 |     io::stdin().read_line(&mut difficulty);
Nov 28 01:52:53.561 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.561 INFO [stderr]    |
Nov 28 01:52:53.561 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.561 INFO [stderr] 
Nov 28 01:52:53.561 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.561 INFO [stderr]   --> src/main.rs:36:9
Nov 28 01:52:53.561 INFO [stderr]    |
Nov 28 01:52:53.561 INFO [stderr] 36 |         io::stdout().flush();
Nov 28 01:52:53.561 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.561 INFO [stderr]    |
Nov 28 01:52:53.561 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.561 INFO [stderr] 
Nov 28 01:52:53.561 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.561 INFO [stderr]   --> src/main.rs:38:9
Nov 28 01:52:53.561 INFO [stderr]    |
Nov 28 01:52:53.561 INFO [stderr] 38 |         io::stdin().read_line(&mut choice);
Nov 28 01:52:53.561 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.561 INFO [stderr]    |
Nov 28 01:52:53.561 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.561 INFO [stderr] 
Nov 28 01:52:53.561 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.561 INFO [stderr]   --> src/main.rs:54:17
Nov 28 01:52:53.561 INFO [stderr]    |
Nov 28 01:52:53.561 INFO [stderr] 54 |                 io::stdout().flush();
Nov 28 01:52:53.561 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.561 INFO [stderr]    |
Nov 28 01:52:53.561 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.561 INFO [stderr] 
Nov 28 01:52:53.561 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.561 INFO [stderr]   --> src/main.rs:55:17
Nov 28 01:52:53.561 INFO [stderr]    |
Nov 28 01:52:53.561 INFO [stderr] 55 |                 io::stdin().read_line(&mut sender);
Nov 28 01:52:53.561 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.561 INFO [stderr]    |
Nov 28 01:52:53.561 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.561 INFO [stderr] 
Nov 28 01:52:53.561 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.561 INFO [stderr]   --> src/main.rs:58:17
Nov 28 01:52:53.561 INFO [stderr]    |
Nov 28 01:52:53.561 INFO [stderr] 58 |                 io::stdout().flush();
Nov 28 01:52:53.561 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.561 INFO [stderr]    |
Nov 28 01:52:53.561 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.561 INFO [stderr] 
Nov 28 01:52:53.561 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.561 INFO [stderr]   --> src/main.rs:59:17
Nov 28 01:52:53.561 INFO [stderr]    |
Nov 28 01:52:53.561 INFO [stderr] 59 |                 io::stdin().read_line(&mut reciever);
Nov 28 01:52:53.561 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.561 INFO [stderr]    |
Nov 28 01:52:53.561 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.564 INFO [stderr] 
Nov 28 01:52:53.564 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.565 INFO [stderr]   --> src/main.rs:62:17
Nov 28 01:52:53.565 INFO [stderr]    |
Nov 28 01:52:53.565 INFO [stderr] 62 |                 io::stdout().flush();
Nov 28 01:52:53.565 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.565 INFO [stderr]    |
Nov 28 01:52:53.565 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.565 INFO [stderr] 
Nov 28 01:52:53.565 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.565 INFO [stderr]   --> src/main.rs:63:17
Nov 28 01:52:53.565 INFO [stderr]    |
Nov 28 01:52:53.565 INFO [stderr] 63 |                 io::stdin().read_line(&mut amount);
Nov 28 01:52:53.565 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.565 INFO [stderr]    |
Nov 28 01:52:53.565 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.565 INFO [stderr] 
Nov 28 01:52:53.565 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.565 INFO [stderr]   --> src/main.rs:85:17
Nov 28 01:52:53.565 INFO [stderr]    |
Nov 28 01:52:53.565 INFO [stderr] 85 |                 io::stdout().flush();
Nov 28 01:52:53.565 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.565 INFO [stderr]    |
Nov 28 01:52:53.565 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.565 INFO [stderr] 
Nov 28 01:52:53.565 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.565 INFO [stderr]   --> src/main.rs:86:17
Nov 28 01:52:53.565 INFO [stderr]    |
Nov 28 01:52:53.565 INFO [stderr] 86 |                 io::stdin().read_line(&mut new_diff);
Nov 28 01:52:53.565 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.565 INFO [stderr]    |
Nov 28 01:52:53.565 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.565 INFO [stderr] 
Nov 28 01:52:53.565 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.565 INFO [stderr]   --> src/main.rs:96:17
Nov 28 01:52:53.565 INFO [stderr]    |
Nov 28 01:52:53.565 INFO [stderr] 96 |                 io::stdout().flush();
Nov 28 01:52:53.565 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.565 INFO [stderr]    |
Nov 28 01:52:53.565 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.565 INFO [stderr] 
Nov 28 01:52:53.565 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 01:52:53.565 INFO [stderr]   --> src/main.rs:97:17
Nov 28 01:52:53.565 INFO [stderr]    |
Nov 28 01:52:53.565 INFO [stderr] 97 |                 io::stdin().read_line(&mut new_reward);
Nov 28 01:52:53.565 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 01:52:53.565 INFO [stderr]    |
Nov 28 01:52:53.565 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 01:52:53.565 INFO [stderr] 
Nov 28 01:52:53.620 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.88s
Nov 28 01:52:53.625 INFO [stderr] su: No module specific data is present
Nov 28 01:52:55.013 INFO running `"docker" "inspect" "a3a2a7f22a5ed815dc667d08ece22c0cf048e6e496c6f85f9b45e6b6cad02642"`
Nov 28 01:52:55.385 INFO running `"docker" "rm" "-f" "a3a2a7f22a5ed815dc667d08ece22c0cf048e6e496c6f85f9b45e6b6cad02642"`
Nov 28 01:52:55.765 INFO [stdout] a3a2a7f22a5ed815dc667d08ece22c0cf048e6e496c6f85f9b45e6b6cad02642