Dec 11 14:48:10.681 INFO checking lezwon/Blockchain-from-Scratch against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 11 14:48:10.681 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-7/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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 11 14:48:11.246 INFO [stdout] b4b133a25243ae7641b500c704d5185354cd3510ea7db0829e0c317db5c74b0f
Dec 11 14:48:11.248 INFO running `"docker" "start" "-a" "b4b133a25243ae7641b500c704d5185354cd3510ea7db0829e0c317db5c74b0f"`
Dec 11 14:48:12.621 INFO [stderr] usermod: no changes
Dec 11 14:48:12.724 INFO [stderr]     Checking blockchain-rust v0.1.0 (/source)
Dec 11 14:48:13.758 INFO [stderr] warning: variable does not need to be mutable
Dec 11 14:48:13.758 INFO [stderr]   --> src/main.rs:94:8
Dec 11 14:48:13.758 INFO [stderr]    |
Dec 11 14:48:13.758 INFO [stderr] 94 |             let mut block_header = BlockHeader{
Dec 11 14:48:13.758 INFO [stderr]    |                 ----^^^^^^^^^^^^
Dec 11 14:48:13.758 INFO [stderr]    |                 |
Dec 11 14:48:13.758 INFO [stderr]    |                 help: remove this `mut`
Dec 11 14:48:13.758 INFO [stderr]    |
Dec 11 14:48:13.758 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 11 14:48:13.758 INFO [stderr] 
Dec 11 14:48:13.775 INFO [stderr] warning: variable does not need to be mutable
Dec 11 14:48:13.775 INFO [stderr]   --> src/main.rs:94:8
Dec 11 14:48:13.775 INFO [stderr]    |
Dec 11 14:48:13.775 INFO [stderr] 94 |             let mut block_header = BlockHeader{
Dec 11 14:48:13.775 INFO [stderr]    |                 ----^^^^^^^^^^^^
Dec 11 14:48:13.775 INFO [stderr]    |                 |
Dec 11 14:48:13.775 INFO [stderr]    |                 help: remove this `mut`
Dec 11 14:48:13.775 INFO [stderr]    |
Dec 11 14:48:13.781 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 11 14:48:13.781 INFO [stderr] 
Dec 11 14:48:13.781 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.781 INFO [stderr]    --> src/main.rs:210:2
Dec 11 14:48:13.781 INFO [stderr]     |
Dec 11 14:48:13.781 INFO [stderr] 210 |     io::stdout().flush();
Dec 11 14:48:13.781 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.781 INFO [stderr]     |
Dec 11 14:48:13.781 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 11 14:48:13.781 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.781 INFO [stderr] 
Dec 11 14:48:13.781 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.781 INFO [stderr]    --> src/main.rs:211:2
Dec 11 14:48:13.781 INFO [stderr]     |
Dec 11 14:48:13.781 INFO [stderr] 211 |     io::stdin().read_line(&mut miner_address);
Dec 11 14:48:13.781 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.781 INFO [stderr]     |
Dec 11 14:48:13.781 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.781 INFO [stderr] 
Dec 11 14:48:13.781 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.781 INFO [stderr]    --> src/main.rs:213:2
Dec 11 14:48:13.781 INFO [stderr]     |
Dec 11 14:48:13.781 INFO [stderr] 213 |     io::stdout().flush();
Dec 11 14:48:13.781 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.781 INFO [stderr]     |
Dec 11 14:48:13.781 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.781 INFO [stderr] 
Dec 11 14:48:13.781 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.781 INFO [stderr]    --> src/main.rs:214:2
Dec 11 14:48:13.781 INFO [stderr]     |
Dec 11 14:48:13.781 INFO [stderr] 214 |     io::stdin().read_line(&mut difficulty_string);
Dec 11 14:48:13.781 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.781 INFO [stderr]     |
Dec 11 14:48:13.781 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.781 INFO [stderr] 
Dec 11 14:48:13.781 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.781 INFO [stderr]    --> src/main.rs:229:3
Dec 11 14:48:13.781 INFO [stderr]     |
Dec 11 14:48:13.781 INFO [stderr] 229 |         io::stdout().flush();
Dec 11 14:48:13.781 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.781 INFO [stderr]     |
Dec 11 14:48:13.781 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.781 INFO [stderr] 
Dec 11 14:48:13.781 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.781 INFO [stderr]    --> src/main.rs:231:3
Dec 11 14:48:13.781 INFO [stderr]     |
Dec 11 14:48:13.781 INFO [stderr] 231 |         io::stdin().read_line(&mut choice);
Dec 11 14:48:13.781 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.781 INFO [stderr]     |
Dec 11 14:48:13.781 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.781 INFO [stderr] 
Dec 11 14:48:13.781 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.781 INFO [stderr]    --> src/main.rs:247:5
Dec 11 14:48:13.781 INFO [stderr]     |
Dec 11 14:48:13.781 INFO [stderr] 247 |                 io::stdout().flush();
Dec 11 14:48:13.781 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.781 INFO [stderr]     |
Dec 11 14:48:13.781 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.781 INFO [stderr] 
Dec 11 14:48:13.781 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.781 INFO [stderr]    --> src/main.rs:248:5
Dec 11 14:48:13.781 INFO [stderr]     |
Dec 11 14:48:13.781 INFO [stderr] 248 |                 io::stdin().read_line(&mut sender);
Dec 11 14:48:13.781 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.781 INFO [stderr]     |
Dec 11 14:48:13.781 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.781 INFO [stderr] 
Dec 11 14:48:13.781 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.781 INFO [stderr]    --> src/main.rs:250:5
Dec 11 14:48:13.781 INFO [stderr]     |
Dec 11 14:48:13.781 INFO [stderr] 250 |                 io::stdout().flush();
Dec 11 14:48:13.781 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.781 INFO [stderr]     |
Dec 11 14:48:13.781 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.781 INFO [stderr] 
Dec 11 14:48:13.781 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.781 INFO [stderr]    --> src/main.rs:251:5
Dec 11 14:48:13.781 INFO [stderr]     |
Dec 11 14:48:13.781 INFO [stderr] 251 |                 io::stdin().read_line(&mut recipient);
Dec 11 14:48:13.781 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.782 INFO [stderr]     |
Dec 11 14:48:13.782 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.782 INFO [stderr] 
Dec 11 14:48:13.782 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.782 INFO [stderr]    --> src/main.rs:253:5
Dec 11 14:48:13.782 INFO [stderr]     |
Dec 11 14:48:13.782 INFO [stderr] 253 |                 io::stdout().flush();
Dec 11 14:48:13.782 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.782 INFO [stderr]     |
Dec 11 14:48:13.782 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.782 INFO [stderr] 
Dec 11 14:48:13.782 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.782 INFO [stderr]    --> src/main.rs:254:5
Dec 11 14:48:13.782 INFO [stderr]     |
Dec 11 14:48:13.782 INFO [stderr] 254 |                 io::stdin().read_line(&mut amount);
Dec 11 14:48:13.782 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.782 INFO [stderr]     |
Dec 11 14:48:13.782 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.782 INFO [stderr] 
Dec 11 14:48:13.782 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.782 INFO [stderr]    --> src/main.rs:274:5
Dec 11 14:48:13.782 INFO [stderr]     |
Dec 11 14:48:13.782 INFO [stderr] 274 |                 io::stdout().flush();
Dec 11 14:48:13.782 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.782 INFO [stderr]     |
Dec 11 14:48:13.782 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.782 INFO [stderr] 
Dec 11 14:48:13.782 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.782 INFO [stderr]    --> src/main.rs:275:5
Dec 11 14:48:13.782 INFO [stderr]     |
Dec 11 14:48:13.782 INFO [stderr] 275 |                 io::stdin().read_line(&mut new_difficulty);
Dec 11 14:48:13.782 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.782 INFO [stderr]     |
Dec 11 14:48:13.782 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.782 INFO [stderr] 
Dec 11 14:48:13.782 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.782 INFO [stderr]    --> src/main.rs:286:5
Dec 11 14:48:13.782 INFO [stderr]     |
Dec 11 14:48:13.782 INFO [stderr] 286 |                 io::stdout().flush();
Dec 11 14:48:13.782 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.782 INFO [stderr]     |
Dec 11 14:48:13.782 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.782 INFO [stderr] 
Dec 11 14:48:13.782 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.782 INFO [stderr]    --> src/main.rs:287:5
Dec 11 14:48:13.782 INFO [stderr]     |
Dec 11 14:48:13.782 INFO [stderr] 287 |                 io::stdin().read_line(&mut new_reward);
Dec 11 14:48:13.782 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.782 INFO [stderr]     |
Dec 11 14:48:13.782 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.782 INFO [stderr] 
Dec 11 14:48:13.796 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.796 INFO [stderr]    --> src/main.rs:210:2
Dec 11 14:48:13.796 INFO [stderr]     |
Dec 11 14:48:13.796 INFO [stderr] 210 |     io::stdout().flush();
Dec 11 14:48:13.796 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.797 INFO [stderr]     |
Dec 11 14:48:13.797 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 11 14:48:13.797 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.797 INFO [stderr] 
Dec 11 14:48:13.797 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.797 INFO [stderr]    --> src/main.rs:211:2
Dec 11 14:48:13.797 INFO [stderr]     |
Dec 11 14:48:13.797 INFO [stderr] 211 |     io::stdin().read_line(&mut miner_address);
Dec 11 14:48:13.797 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.797 INFO [stderr]     |
Dec 11 14:48:13.797 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.797 INFO [stderr] 
Dec 11 14:48:13.797 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.797 INFO [stderr]    --> src/main.rs:213:2
Dec 11 14:48:13.797 INFO [stderr]     |
Dec 11 14:48:13.797 INFO [stderr] 213 |     io::stdout().flush();
Dec 11 14:48:13.797 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.797 INFO [stderr]     |
Dec 11 14:48:13.797 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.797 INFO [stderr] 
Dec 11 14:48:13.797 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.797 INFO [stderr]    --> src/main.rs:214:2
Dec 11 14:48:13.797 INFO [stderr]     |
Dec 11 14:48:13.797 INFO [stderr] 214 |     io::stdin().read_line(&mut difficulty_string);
Dec 11 14:48:13.797 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.797 INFO [stderr]     |
Dec 11 14:48:13.797 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.797 INFO [stderr] 
Dec 11 14:48:13.797 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.797 INFO [stderr]    --> src/main.rs:229:3
Dec 11 14:48:13.797 INFO [stderr]     |
Dec 11 14:48:13.797 INFO [stderr] 229 |         io::stdout().flush();
Dec 11 14:48:13.797 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.797 INFO [stderr]     |
Dec 11 14:48:13.797 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.797 INFO [stderr] 
Dec 11 14:48:13.797 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.797 INFO [stderr]    --> src/main.rs:231:3
Dec 11 14:48:13.797 INFO [stderr]     |
Dec 11 14:48:13.797 INFO [stderr] 231 |         io::stdin().read_line(&mut choice);
Dec 11 14:48:13.797 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.797 INFO [stderr]     |
Dec 11 14:48:13.797 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.797 INFO [stderr] 
Dec 11 14:48:13.797 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.797 INFO [stderr]    --> src/main.rs:247:5
Dec 11 14:48:13.797 INFO [stderr]     |
Dec 11 14:48:13.797 INFO [stderr] 247 |                 io::stdout().flush();
Dec 11 14:48:13.797 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.797 INFO [stderr]     |
Dec 11 14:48:13.797 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.797 INFO [stderr] 
Dec 11 14:48:13.797 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.797 INFO [stderr]    --> src/main.rs:248:5
Dec 11 14:48:13.797 INFO [stderr]     |
Dec 11 14:48:13.797 INFO [stderr] 248 |                 io::stdin().read_line(&mut sender);
Dec 11 14:48:13.797 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.797 INFO [stderr]     |
Dec 11 14:48:13.797 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.797 INFO [stderr] 
Dec 11 14:48:13.797 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.797 INFO [stderr]    --> src/main.rs:250:5
Dec 11 14:48:13.797 INFO [stderr]     |
Dec 11 14:48:13.797 INFO [stderr] 250 |                 io::stdout().flush();
Dec 11 14:48:13.797 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.797 INFO [stderr]     |
Dec 11 14:48:13.797 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.797 INFO [stderr] 
Dec 11 14:48:13.797 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.797 INFO [stderr]    --> src/main.rs:251:5
Dec 11 14:48:13.797 INFO [stderr]     |
Dec 11 14:48:13.797 INFO [stderr] 251 |                 io::stdin().read_line(&mut recipient);
Dec 11 14:48:13.797 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.804 INFO [stderr]     |
Dec 11 14:48:13.804 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.804 INFO [stderr] 
Dec 11 14:48:13.804 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.804 INFO [stderr]    --> src/main.rs:253:5
Dec 11 14:48:13.804 INFO [stderr]     |
Dec 11 14:48:13.804 INFO [stderr] 253 |                 io::stdout().flush();
Dec 11 14:48:13.804 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.804 INFO [stderr]     |
Dec 11 14:48:13.804 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.804 INFO [stderr] 
Dec 11 14:48:13.804 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.804 INFO [stderr]    --> src/main.rs:254:5
Dec 11 14:48:13.804 INFO [stderr]     |
Dec 11 14:48:13.804 INFO [stderr] 254 |                 io::stdin().read_line(&mut amount);
Dec 11 14:48:13.804 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.805 INFO [stderr]     |
Dec 11 14:48:13.805 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.805 INFO [stderr] 
Dec 11 14:48:13.805 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.805 INFO [stderr]    --> src/main.rs:274:5
Dec 11 14:48:13.805 INFO [stderr]     |
Dec 11 14:48:13.805 INFO [stderr] 274 |                 io::stdout().flush();
Dec 11 14:48:13.805 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.805 INFO [stderr]     |
Dec 11 14:48:13.805 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.805 INFO [stderr] 
Dec 11 14:48:13.805 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.805 INFO [stderr]    --> src/main.rs:275:5
Dec 11 14:48:13.805 INFO [stderr]     |
Dec 11 14:48:13.805 INFO [stderr] 275 |                 io::stdin().read_line(&mut new_difficulty);
Dec 11 14:48:13.805 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.805 INFO [stderr]     |
Dec 11 14:48:13.805 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.805 INFO [stderr] 
Dec 11 14:48:13.805 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.805 INFO [stderr]    --> src/main.rs:286:5
Dec 11 14:48:13.805 INFO [stderr]     |
Dec 11 14:48:13.805 INFO [stderr] 286 |                 io::stdout().flush();
Dec 11 14:48:13.805 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.805 INFO [stderr]     |
Dec 11 14:48:13.805 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.805 INFO [stderr] 
Dec 11 14:48:13.805 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 14:48:13.805 INFO [stderr]    --> src/main.rs:287:5
Dec 11 14:48:13.805 INFO [stderr]     |
Dec 11 14:48:13.805 INFO [stderr] 287 |                 io::stdin().read_line(&mut new_reward);
Dec 11 14:48:13.805 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:48:13.805 INFO [stderr]     |
Dec 11 14:48:13.805 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 14:48:13.805 INFO [stderr] 
Dec 11 14:48:13.860 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.21s
Dec 11 14:48:13.876 INFO [stderr] su: No module specific data is present
Dec 11 14:48:14.583 INFO running `"docker" "inspect" "b4b133a25243ae7641b500c704d5185354cd3510ea7db0829e0c317db5c74b0f"`
Dec 11 14:48:14.850 INFO running `"docker" "rm" "-f" "b4b133a25243ae7641b500c704d5185354cd3510ea7db0829e0c317db5c74b0f"`
Dec 11 14:48:15.136 INFO [stdout] b4b133a25243ae7641b500c704d5185354cd3510ea7db0829e0c317db5c74b0f