Dec 19 13:41:30.565 INFO checking lezwon/Blockchain-from-Scratch against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 13:41:30.565 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 13:41:31.040 INFO [stdout] 715628bb1f3635239c5f4623a34ee5e6a338bbd9fe1a430f93da6955126867db
Dec 19 13:41:31.048 INFO running `"docker" "start" "-a" "715628bb1f3635239c5f4623a34ee5e6a338bbd9fe1a430f93da6955126867db"`
Dec 19 13:41:32.589 INFO [stderr]     Checking serde_json v1.0.6
Dec 19 13:41:32.589 INFO [stderr]     Checking generic-array v0.9.0
Dec 19 13:41:32.589 INFO [stderr]    Compiling serde_derive v1.0.21
Dec 19 13:41:33.713 INFO [stderr]     Checking digest v0.7.2
Dec 19 13:41:34.168 INFO [stderr]     Checking sha2 v0.7.0
Dec 19 13:41:41.468 INFO [stderr]     Checking blockchain-rust v0.1.0 (/opt/crater/workdir)
Dec 19 13:41:42.108 INFO [stderr] warning: variable does not need to be mutable
Dec 19 13:41:42.109 INFO [stderr]   --> src/main.rs:94:8
Dec 19 13:41:42.109 INFO [stderr]    |
Dec 19 13:41:42.109 INFO [stderr] 94 |             let mut block_header = BlockHeader{
Dec 19 13:41:42.109 INFO [stderr]    |                 ----^^^^^^^^^^^^
Dec 19 13:41:42.109 INFO [stderr]    |                 |
Dec 19 13:41:42.109 INFO [stderr]    |                 help: remove this `mut`
Dec 19 13:41:42.109 INFO [stderr]    |
Dec 19 13:41:42.109 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 13:41:42.109 INFO [stderr] 
Dec 19 13:41:42.116 INFO [stderr] warning: variable does not need to be mutable
Dec 19 13:41:42.116 INFO [stderr]   --> src/main.rs:94:8
Dec 19 13:41:42.116 INFO [stderr]    |
Dec 19 13:41:42.116 INFO [stderr] 94 |             let mut block_header = BlockHeader{
Dec 19 13:41:42.116 INFO [stderr]    |                 ----^^^^^^^^^^^^
Dec 19 13:41:42.116 INFO [stderr]    |                 |
Dec 19 13:41:42.116 INFO [stderr]    |                 help: remove this `mut`
Dec 19 13:41:42.116 INFO [stderr]    |
Dec 19 13:41:42.116 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 13:41:42.116 INFO [stderr] 
Dec 19 13:41:42.124 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.124 INFO [stderr]    --> src/main.rs:210:2
Dec 19 13:41:42.124 INFO [stderr]     |
Dec 19 13:41:42.124 INFO [stderr] 210 |     io::stdout().flush();
Dec 19 13:41:42.124 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.124 INFO [stderr]     |
Dec 19 13:41:42.124 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 13:41:42.124 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.124 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.124 INFO [stderr]    --> src/main.rs:210:2
Dec 19 13:41:42.124 INFO [stderr]     |
Dec 19 13:41:42.124 INFO [stderr] 210 |     io::stdout().flush();
Dec 19 13:41:42.124 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.124 INFO [stderr]     |
Dec 19 13:41:42.125 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 13:41:42.125 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.125 INFO [stderr] 
Dec 19 13:41:42.125 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.125 INFO [stderr]    --> src/main.rs:211:2
Dec 19 13:41:42.125 INFO [stderr]     |
Dec 19 13:41:42.125 INFO [stderr] 211 |     io::stdin().read_line(&mut miner_address);
Dec 19 13:41:42.125 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.126 INFO [stderr]     |
Dec 19 13:41:42.126 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.126 INFO [stderr] 
Dec 19 13:41:42.126 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.126 INFO [stderr]    --> src/main.rs:213:2
Dec 19 13:41:42.126 INFO [stderr]     |
Dec 19 13:41:42.126 INFO [stderr] 213 |     io::stdout().flush();
Dec 19 13:41:42.126 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.126 INFO [stderr]     |
Dec 19 13:41:42.126 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.126 INFO [stderr] 
Dec 19 13:41:42.126 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.126 INFO [stderr]    --> src/main.rs:214:2
Dec 19 13:41:42.126 INFO [stderr]     |
Dec 19 13:41:42.126 INFO [stderr] 214 |     io::stdin().read_line(&mut difficulty_string);
Dec 19 13:41:42.126 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.126 INFO [stderr]     |
Dec 19 13:41:42.126 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.126 INFO [stderr] 
Dec 19 13:41:42.126 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.126 INFO [stderr]    --> src/main.rs:229:3
Dec 19 13:41:42.126 INFO [stderr]     |
Dec 19 13:41:42.126 INFO [stderr] 229 |         io::stdout().flush();
Dec 19 13:41:42.126 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.126 INFO [stderr]     |
Dec 19 13:41:42.126 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.126 INFO [stderr] 
Dec 19 13:41:42.126 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.126 INFO [stderr]    --> src/main.rs:231:3
Dec 19 13:41:42.126 INFO [stderr]     |
Dec 19 13:41:42.126 INFO [stderr] 231 |         io::stdin().read_line(&mut choice);
Dec 19 13:41:42.126 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.126 INFO [stderr]     |
Dec 19 13:41:42.126 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.126 INFO [stderr] 
Dec 19 13:41:42.126 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.126 INFO [stderr]    --> src/main.rs:247:5
Dec 19 13:41:42.126 INFO [stderr]     |
Dec 19 13:41:42.126 INFO [stderr] 247 |                 io::stdout().flush();
Dec 19 13:41:42.126 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.126 INFO [stderr]     |
Dec 19 13:41:42.126 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.126 INFO [stderr] 
Dec 19 13:41:42.126 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.126 INFO [stderr]    --> src/main.rs:248:5
Dec 19 13:41:42.126 INFO [stderr]     |
Dec 19 13:41:42.126 INFO [stderr] 248 |                 io::stdin().read_line(&mut sender);
Dec 19 13:41:42.126 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.126 INFO [stderr]     |
Dec 19 13:41:42.126 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.126 INFO [stderr] 
Dec 19 13:41:42.126 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.126 INFO [stderr]    --> src/main.rs:250:5
Dec 19 13:41:42.126 INFO [stderr]     |
Dec 19 13:41:42.126 INFO [stderr] 250 |                 io::stdout().flush();
Dec 19 13:41:42.126 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.126 INFO [stderr]     |
Dec 19 13:41:42.126 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.126 INFO [stderr] 
Dec 19 13:41:42.126 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.127 INFO [stderr]    --> src/main.rs:251:5
Dec 19 13:41:42.127 INFO [stderr]     |
Dec 19 13:41:42.127 INFO [stderr] 251 |                 io::stdin().read_line(&mut recipient);
Dec 19 13:41:42.127 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.127 INFO [stderr]     |
Dec 19 13:41:42.127 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.127 INFO [stderr] 
Dec 19 13:41:42.127 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.127 INFO [stderr]    --> src/main.rs:253:5
Dec 19 13:41:42.127 INFO [stderr]     |
Dec 19 13:41:42.127 INFO [stderr] 253 |                 io::stdout().flush();
Dec 19 13:41:42.127 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.127 INFO [stderr]     |
Dec 19 13:41:42.127 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.127 INFO [stderr] 
Dec 19 13:41:42.127 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.127 INFO [stderr]    --> src/main.rs:254:5
Dec 19 13:41:42.127 INFO [stderr]     |
Dec 19 13:41:42.127 INFO [stderr] 254 |                 io::stdin().read_line(&mut amount);
Dec 19 13:41:42.127 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.127 INFO [stderr]     |
Dec 19 13:41:42.127 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.127 INFO [stderr] 
Dec 19 13:41:42.127 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.127 INFO [stderr]    --> src/main.rs:274:5
Dec 19 13:41:42.127 INFO [stderr]     |
Dec 19 13:41:42.127 INFO [stderr] 274 |                 io::stdout().flush();
Dec 19 13:41:42.127 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.127 INFO [stderr]     |
Dec 19 13:41:42.127 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.127 INFO [stderr] 
Dec 19 13:41:42.127 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.127 INFO [stderr]    --> src/main.rs:275:5
Dec 19 13:41:42.127 INFO [stderr]     |
Dec 19 13:41:42.127 INFO [stderr] 275 |                 io::stdin().read_line(&mut new_difficulty);
Dec 19 13:41:42.127 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.127 INFO [stderr]     |
Dec 19 13:41:42.127 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.127 INFO [stderr] 
Dec 19 13:41:42.127 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.127 INFO [stderr]    --> src/main.rs:286:5
Dec 19 13:41:42.127 INFO [stderr]     |
Dec 19 13:41:42.127 INFO [stderr] 286 |                 io::stdout().flush();
Dec 19 13:41:42.127 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.127 INFO [stderr]     |
Dec 19 13:41:42.127 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.127 INFO [stderr] 
Dec 19 13:41:42.127 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.127 INFO [stderr]    --> src/main.rs:287:5
Dec 19 13:41:42.127 INFO [stderr]     |
Dec 19 13:41:42.127 INFO [stderr] 287 |                 io::stdin().read_line(&mut new_reward);
Dec 19 13:41:42.127 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.127 INFO [stderr]     |
Dec 19 13:41:42.127 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.127 INFO [stderr] 
Dec 19 13:41:42.127 INFO [stderr] 
Dec 19 13:41:42.127 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.127 INFO [stderr]    --> src/main.rs:211:2
Dec 19 13:41:42.127 INFO [stderr]     |
Dec 19 13:41:42.127 INFO [stderr] 211 |     io::stdin().read_line(&mut miner_address);
Dec 19 13:41:42.127 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.127 INFO [stderr]     |
Dec 19 13:41:42.127 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.127 INFO [stderr] 
Dec 19 13:41:42.127 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.127 INFO [stderr]    --> src/main.rs:213:2
Dec 19 13:41:42.128 INFO [stderr]     |
Dec 19 13:41:42.128 INFO [stderr] 213 |     io::stdout().flush();
Dec 19 13:41:42.128 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.128 INFO [stderr]     |
Dec 19 13:41:42.128 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.128 INFO [stderr] 
Dec 19 13:41:42.128 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.128 INFO [stderr]    --> src/main.rs:214:2
Dec 19 13:41:42.128 INFO [stderr]     |
Dec 19 13:41:42.128 INFO [stderr] 214 |     io::stdin().read_line(&mut difficulty_string);
Dec 19 13:41:42.128 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.128 INFO [stderr]     |
Dec 19 13:41:42.128 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.128 INFO [stderr] 
Dec 19 13:41:42.128 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.128 INFO [stderr]    --> src/main.rs:229:3
Dec 19 13:41:42.128 INFO [stderr]     |
Dec 19 13:41:42.128 INFO [stderr] 229 |         io::stdout().flush();
Dec 19 13:41:42.128 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.128 INFO [stderr]     |
Dec 19 13:41:42.128 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.128 INFO [stderr] 
Dec 19 13:41:42.128 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.128 INFO [stderr]    --> src/main.rs:231:3
Dec 19 13:41:42.128 INFO [stderr]     |
Dec 19 13:41:42.128 INFO [stderr] 231 |         io::stdin().read_line(&mut choice);
Dec 19 13:41:42.128 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.128 INFO [stderr]     |
Dec 19 13:41:42.128 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.128 INFO [stderr] 
Dec 19 13:41:42.128 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.128 INFO [stderr]    --> src/main.rs:247:5
Dec 19 13:41:42.128 INFO [stderr]     |
Dec 19 13:41:42.128 INFO [stderr] 247 |                 io::stdout().flush();
Dec 19 13:41:42.132 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.132 INFO [stderr]     |
Dec 19 13:41:42.132 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.132 INFO [stderr] 
Dec 19 13:41:42.132 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.132 INFO [stderr]    --> src/main.rs:248:5
Dec 19 13:41:42.132 INFO [stderr]     |
Dec 19 13:41:42.132 INFO [stderr] 248 |                 io::stdin().read_line(&mut sender);
Dec 19 13:41:42.132 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.132 INFO [stderr]     |
Dec 19 13:41:42.132 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.132 INFO [stderr] 
Dec 19 13:41:42.132 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.132 INFO [stderr]    --> src/main.rs:250:5
Dec 19 13:41:42.132 INFO [stderr]     |
Dec 19 13:41:42.132 INFO [stderr] 250 |                 io::stdout().flush();
Dec 19 13:41:42.132 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.132 INFO [stderr]     |
Dec 19 13:41:42.132 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.132 INFO [stderr] 
Dec 19 13:41:42.132 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.132 INFO [stderr]    --> src/main.rs:251:5
Dec 19 13:41:42.132 INFO [stderr]     |
Dec 19 13:41:42.132 INFO [stderr] 251 |                 io::stdin().read_line(&mut recipient);
Dec 19 13:41:42.132 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.132 INFO [stderr]     |
Dec 19 13:41:42.132 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.132 INFO [stderr] 
Dec 19 13:41:42.132 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.132 INFO [stderr]    --> src/main.rs:253:5
Dec 19 13:41:42.132 INFO [stderr]     |
Dec 19 13:41:42.133 INFO [stderr] 253 |                 io::stdout().flush();
Dec 19 13:41:42.133 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.133 INFO [stderr]     |
Dec 19 13:41:42.133 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.133 INFO [stderr] 
Dec 19 13:41:42.133 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.134 INFO [stderr]    --> src/main.rs:254:5
Dec 19 13:41:42.134 INFO [stderr]     |
Dec 19 13:41:42.134 INFO [stderr] 254 |                 io::stdin().read_line(&mut amount);
Dec 19 13:41:42.134 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.134 INFO [stderr]     |
Dec 19 13:41:42.134 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.134 INFO [stderr] 
Dec 19 13:41:42.134 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.135 INFO [stderr]    --> src/main.rs:274:5
Dec 19 13:41:42.135 INFO [stderr]     |
Dec 19 13:41:42.135 INFO [stderr] 274 |                 io::stdout().flush();
Dec 19 13:41:42.135 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.135 INFO [stderr]     |
Dec 19 13:41:42.135 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.135 INFO [stderr] 
Dec 19 13:41:42.136 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.136 INFO [stderr]    --> src/main.rs:275:5
Dec 19 13:41:42.136 INFO [stderr]     |
Dec 19 13:41:42.136 INFO [stderr] 275 |                 io::stdin().read_line(&mut new_difficulty);
Dec 19 13:41:42.136 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.136 INFO [stderr]     |
Dec 19 13:41:42.136 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.136 INFO [stderr] 
Dec 19 13:41:42.137 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.137 INFO [stderr]    --> src/main.rs:286:5
Dec 19 13:41:42.137 INFO [stderr]     |
Dec 19 13:41:42.137 INFO [stderr] 286 |                 io::stdout().flush();
Dec 19 13:41:42.137 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.137 INFO [stderr]     |
Dec 19 13:41:42.137 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.138 INFO [stderr] 
Dec 19 13:41:42.138 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:41:42.138 INFO [stderr]    --> src/main.rs:287:5
Dec 19 13:41:42.138 INFO [stderr]     |
Dec 19 13:41:42.140 INFO [stderr] 287 |                 io::stdin().read_line(&mut new_reward);
Dec 19 13:41:42.140 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:41:42.140 INFO [stderr]     |
Dec 19 13:41:42.140 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:41:42.140 INFO [stderr] 
Dec 19 13:41:42.204 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.71s
Dec 19 13:41:43.342 INFO running `"docker" "inspect" "715628bb1f3635239c5f4623a34ee5e6a338bbd9fe1a430f93da6955126867db"`
Dec 19 13:41:43.664 INFO running `"docker" "rm" "-f" "715628bb1f3635239c5f4623a34ee5e6a338bbd9fe1a430f93da6955126867db"`
Dec 19 13:41:44.064 INFO [stdout] 715628bb1f3635239c5f4623a34ee5e6a338bbd9fe1a430f93da6955126867db