Dec 19 13:41:31.114 INFO checking lezwon/Blockchain-from-Scratch against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 13:41:31.114 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-6/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/lezwon/Blockchain-from-Scratch:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 13:41:31.644 INFO [stdout] dd038f9948df2517bc5d43912bad8f439064785a8ffde566b61df12fdacbe964
Dec 19 13:41:31.646 INFO running `"docker" "start" "-a" "dd038f9948df2517bc5d43912bad8f439064785a8ffde566b61df12fdacbe964"`
Dec 19 13:41:33.452 INFO [stderr]    Compiling typenum v1.9.0
Dec 19 13:41:36.868 INFO [stderr]     Checking generic-array v0.9.0
Dec 19 13:41:37.600 INFO [stderr]     Checking digest v0.7.2
Dec 19 13:41:37.948 INFO [stderr]     Checking sha2 v0.7.0
Dec 19 13:41:38.489 INFO [stderr]     Checking blockchain-rust v0.1.0 (/opt/crater/workdir)
Dec 19 13:41:39.476 INFO [stderr] warning: variable does not need to be mutable
Dec 19 13:41:39.476 INFO [stderr]   --> src/main.rs:94:8
Dec 19 13:41:39.476 INFO [stderr]    |
Dec 19 13:41:39.476 INFO [stderr] 94 |             let mut block_header = BlockHeader{
Dec 19 13:41:39.476 INFO [stderr]    |                 ----^^^^^^^^^^^^
Dec 19 13:41:39.476 INFO [stderr]    |                 |
Dec 19 13:41:39.476 INFO [stderr]    |                 help: remove this `mut`
Dec 19 13:41:39.484 INFO [stderr] warning: variable does not need to be mutable
Dec 19 13:41:39.484 INFO [stderr]   --> src/main.rs:94:8
Dec 19 13:41:39.484 INFO [stderr]    |
Dec 19 13:41:39.484 INFO [stderr] 94 |             let mut block_header = BlockHeader{
Dec 19 13:41:39.484 INFO [stderr]    |                 ----^^^^^^^^^^^^
Dec 19 13:41:39.484 INFO [stderr]    |                 |
Dec 19 13:41:39.484 INFO [stderr]    |                 help: remove this `mut`
Dec 19 13:41:39.484 INFO [stderr]    |
Dec 19 13:41:39.484 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 13:41:39.488 INFO [stderr] 
Dec 19 13:41:39.508 INFO [stderr]    |
Dec 19 13:41:39.508 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 13:41:39.508 INFO [stderr] 
Dec 19 13:41:39.528 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.528 INFO [stderr]    --> src/main.rs:210:2
Dec 19 13:41:39.528 INFO [stderr]     |
Dec 19 13:41:39.528 INFO [stderr] 210 |     io::stdout().flush();
Dec 19 13:41:39.528 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.528 INFO [stderr]     |
Dec 19 13:41:39.528 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 13:41:39.528 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.528 INFO [stderr] 
Dec 19 13:41:39.528 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.528 INFO [stderr]    --> src/main.rs:211:2
Dec 19 13:41:39.528 INFO [stderr]     |
Dec 19 13:41:39.528 INFO [stderr] 211 |     io::stdin().read_line(&mut miner_address);
Dec 19 13:41:39.528 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.528 INFO [stderr]     |
Dec 19 13:41:39.528 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.528 INFO [stderr] 
Dec 19 13:41:39.528 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.528 INFO [stderr]    --> src/main.rs:213:2
Dec 19 13:41:39.528 INFO [stderr]     |
Dec 19 13:41:39.528 INFO [stderr] 213 |     io::stdout().flush();
Dec 19 13:41:39.528 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.528 INFO [stderr]     |
Dec 19 13:41:39.528 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.528 INFO [stderr] 
Dec 19 13:41:39.532 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.532 INFO [stderr]    --> src/main.rs:214:2
Dec 19 13:41:39.532 INFO [stderr]     |
Dec 19 13:41:39.532 INFO [stderr] 214 |     io::stdin().read_line(&mut difficulty_string);
Dec 19 13:41:39.532 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.532 INFO [stderr]     |
Dec 19 13:41:39.532 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.532 INFO [stderr] 
Dec 19 13:41:39.532 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.532 INFO [stderr]    --> src/main.rs:229:3
Dec 19 13:41:39.532 INFO [stderr]     |
Dec 19 13:41:39.532 INFO [stderr] 229 |         io::stdout().flush();
Dec 19 13:41:39.532 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.532 INFO [stderr]     |
Dec 19 13:41:39.532 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.532 INFO [stderr] 
Dec 19 13:41:39.532 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.532 INFO [stderr]    --> src/main.rs:231:3
Dec 19 13:41:39.532 INFO [stderr]     |
Dec 19 13:41:39.532 INFO [stderr] 231 |         io::stdin().read_line(&mut choice);
Dec 19 13:41:39.532 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.532 INFO [stderr]     |
Dec 19 13:41:39.532 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.532 INFO [stderr] 
Dec 19 13:41:39.532 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.532 INFO [stderr]    --> src/main.rs:247:5
Dec 19 13:41:39.532 INFO [stderr]     |
Dec 19 13:41:39.532 INFO [stderr] 247 |                 io::stdout().flush();
Dec 19 13:41:39.532 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.532 INFO [stderr]     |
Dec 19 13:41:39.532 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.532 INFO [stderr] 
Dec 19 13:41:39.532 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.532 INFO [stderr]    --> src/main.rs:248:5
Dec 19 13:41:39.532 INFO [stderr]     |
Dec 19 13:41:39.532 INFO [stderr] 248 |                 io::stdin().read_line(&mut sender);
Dec 19 13:41:39.532 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.532 INFO [stderr]     |
Dec 19 13:41:39.532 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.532 INFO [stderr] 
Dec 19 13:41:39.532 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.532 INFO [stderr]    --> src/main.rs:250:5
Dec 19 13:41:39.532 INFO [stderr]     |
Dec 19 13:41:39.532 INFO [stderr] 250 |                 io::stdout().flush();
Dec 19 13:41:39.532 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.532 INFO [stderr]     |
Dec 19 13:41:39.532 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.532 INFO [stderr] 
Dec 19 13:41:39.532 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.532 INFO [stderr]    --> src/main.rs:251:5
Dec 19 13:41:39.532 INFO [stderr]     |
Dec 19 13:41:39.532 INFO [stderr] 251 |                 io::stdin().read_line(&mut recipient);
Dec 19 13:41:39.533 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.533 INFO [stderr]     |
Dec 19 13:41:39.533 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.533 INFO [stderr] 
Dec 19 13:41:39.533 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.533 INFO [stderr]    --> src/main.rs:253:5
Dec 19 13:41:39.533 INFO [stderr]     |
Dec 19 13:41:39.533 INFO [stderr] 253 |                 io::stdout().flush();
Dec 19 13:41:39.533 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.533 INFO [stderr]     |
Dec 19 13:41:39.533 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.533 INFO [stderr] 
Dec 19 13:41:39.533 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.533 INFO [stderr]    --> src/main.rs:254:5
Dec 19 13:41:39.533 INFO [stderr]     |
Dec 19 13:41:39.533 INFO [stderr] 254 |                 io::stdin().read_line(&mut amount);
Dec 19 13:41:39.533 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.533 INFO [stderr]     |
Dec 19 13:41:39.533 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.533 INFO [stderr] 
Dec 19 13:41:39.533 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.533 INFO [stderr]    --> src/main.rs:274:5
Dec 19 13:41:39.533 INFO [stderr]     |
Dec 19 13:41:39.533 INFO [stderr] 274 |                 io::stdout().flush();
Dec 19 13:41:39.533 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.533 INFO [stderr]     |
Dec 19 13:41:39.533 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.533 INFO [stderr] 
Dec 19 13:41:39.533 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.533 INFO [stderr]    --> src/main.rs:275:5
Dec 19 13:41:39.533 INFO [stderr]     |
Dec 19 13:41:39.533 INFO [stderr] 275 |                 io::stdin().read_line(&mut new_difficulty);
Dec 19 13:41:39.533 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.533 INFO [stderr]     |
Dec 19 13:41:39.533 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.533 INFO [stderr] 
Dec 19 13:41:39.533 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.533 INFO [stderr]    --> src/main.rs:286:5
Dec 19 13:41:39.533 INFO [stderr]     |
Dec 19 13:41:39.533 INFO [stderr] 286 |                 io::stdout().flush();
Dec 19 13:41:39.533 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.533 INFO [stderr]     |
Dec 19 13:41:39.533 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.533 INFO [stderr] 
Dec 19 13:41:39.533 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.533 INFO [stderr]    --> src/main.rs:287:5
Dec 19 13:41:39.533 INFO [stderr]     |
Dec 19 13:41:39.533 INFO [stderr] 287 |                 io::stdin().read_line(&mut new_reward);
Dec 19 13:41:39.533 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.533 INFO [stderr]     |
Dec 19 13:41:39.533 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.533 INFO [stderr] 
Dec 19 13:41:39.548 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.548 INFO [stderr]    --> src/main.rs:210:2
Dec 19 13:41:39.548 INFO [stderr]     |
Dec 19 13:41:39.548 INFO [stderr] 210 |     io::stdout().flush();
Dec 19 13:41:39.548 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.548 INFO [stderr]     |
Dec 19 13:41:39.548 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 13:41:39.548 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.548 INFO [stderr] 
Dec 19 13:41:39.548 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.548 INFO [stderr]    --> src/main.rs:211:2
Dec 19 13:41:39.548 INFO [stderr]     |
Dec 19 13:41:39.548 INFO [stderr] 211 |     io::stdin().read_line(&mut miner_address);
Dec 19 13:41:39.548 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.548 INFO [stderr]     |
Dec 19 13:41:39.548 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.548 INFO [stderr] 
Dec 19 13:41:39.548 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.548 INFO [stderr]    --> src/main.rs:213:2
Dec 19 13:41:39.548 INFO [stderr]     |
Dec 19 13:41:39.548 INFO [stderr] 213 |     io::stdout().flush();
Dec 19 13:41:39.548 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.548 INFO [stderr]     |
Dec 19 13:41:39.548 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.548 INFO [stderr] 
Dec 19 13:41:39.548 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.548 INFO [stderr]    --> src/main.rs:214:2
Dec 19 13:41:39.548 INFO [stderr]     |
Dec 19 13:41:39.548 INFO [stderr] 214 |     io::stdin().read_line(&mut difficulty_string);
Dec 19 13:41:39.548 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.548 INFO [stderr]     |
Dec 19 13:41:39.548 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.548 INFO [stderr] 
Dec 19 13:41:39.548 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.548 INFO [stderr]    --> src/main.rs:229:3
Dec 19 13:41:39.548 INFO [stderr]     |
Dec 19 13:41:39.548 INFO [stderr] 229 |         io::stdout().flush();
Dec 19 13:41:39.548 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.548 INFO [stderr]     |
Dec 19 13:41:39.548 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.548 INFO [stderr] 
Dec 19 13:41:39.548 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.548 INFO [stderr]    --> src/main.rs:231:3
Dec 19 13:41:39.548 INFO [stderr]     |
Dec 19 13:41:39.548 INFO [stderr] 231 |         io::stdin().read_line(&mut choice);
Dec 19 13:41:39.548 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.549 INFO [stderr] 
Dec 19 13:41:39.549 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.549 INFO [stderr]    --> src/main.rs:247:5
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr] 247 |                 io::stdout().flush();
Dec 19 13:41:39.549 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.549 INFO [stderr] 
Dec 19 13:41:39.549 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.549 INFO [stderr]    --> src/main.rs:248:5
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr] 248 |                 io::stdin().read_line(&mut sender);
Dec 19 13:41:39.549 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.549 INFO [stderr] 
Dec 19 13:41:39.549 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.549 INFO [stderr]    --> src/main.rs:250:5
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr] 250 |                 io::stdout().flush();
Dec 19 13:41:39.549 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.549 INFO [stderr] 
Dec 19 13:41:39.549 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.549 INFO [stderr]    --> src/main.rs:251:5
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr] 251 |                 io::stdin().read_line(&mut recipient);
Dec 19 13:41:39.549 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.549 INFO [stderr] 
Dec 19 13:41:39.549 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.549 INFO [stderr]    --> src/main.rs:253:5
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr] 253 |                 io::stdout().flush();
Dec 19 13:41:39.549 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.549 INFO [stderr] 
Dec 19 13:41:39.549 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.549 INFO [stderr]    --> src/main.rs:254:5
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr] 254 |                 io::stdin().read_line(&mut amount);
Dec 19 13:41:39.549 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.549 INFO [stderr] 
Dec 19 13:41:39.549 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.549 INFO [stderr]    --> src/main.rs:274:5
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr] 274 |                 io::stdout().flush();
Dec 19 13:41:39.549 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.549 INFO [stderr] 
Dec 19 13:41:39.549 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.549 INFO [stderr]    --> src/main.rs:275:5
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr] 275 |                 io::stdin().read_line(&mut new_difficulty);
Dec 19 13:41:39.549 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.549 INFO [stderr] 
Dec 19 13:41:39.549 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.549 INFO [stderr]    --> src/main.rs:286:5
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr] 286 |                 io::stdout().flush();
Dec 19 13:41:39.549 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.549 INFO [stderr] 
Dec 19 13:41:39.549 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:39.549 INFO [stderr]    --> src/main.rs:287:5
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr] 287 |                 io::stdin().read_line(&mut new_reward);
Dec 19 13:41:39.549 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:39.549 INFO [stderr]     |
Dec 19 13:41:39.549 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:39.549 INFO [stderr] 
Dec 19 13:41:39.592 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.28s
Dec 19 13:41:40.406 INFO running `"docker" "inspect" "dd038f9948df2517bc5d43912bad8f439064785a8ffde566b61df12fdacbe964"`
Dec 19 13:41:40.784 INFO running `"docker" "rm" "-f" "dd038f9948df2517bc5d43912bad8f439064785a8ffde566b61df12fdacbe964"`
Dec 19 13:41:41.068 INFO [stdout] dd038f9948df2517bc5d43912bad8f439064785a8ffde566b61df12fdacbe964