Dec 01 11:20:25.928 INFO testing lezwon/Blockchain-from-Scratch against 1.30.1 for beta-1.31-5
Dec 01 11:20:25.928 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-5/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/beta-1.31-5/1.30.1:/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 +1.30.1 build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 01 11:20:26.387 INFO [stdout] 05ea56ec6f606fbaa234389e6706e2f4477259ed3f0091c58c51dc23361611d5
Dec 01 11:20:26.395 INFO running `"docker" "start" "-a" "05ea56ec6f606fbaa234389e6706e2f4477259ed3f0091c58c51dc23361611d5"`
Dec 01 11:20:27.553 INFO [stderr] usermod: no changes
Dec 01 11:20:27.723 INFO [stderr]    Compiling blockchain-rust v0.1.0 (/source)
Dec 01 11:20:28.955 INFO [stderr] warning: variable does not need to be mutable
Dec 01 11:20:28.955 INFO [stderr]   --> src/main.rs:94:8
Dec 01 11:20:28.955 INFO [stderr]    |
Dec 01 11:20:28.955 INFO [stderr] 94 |             let mut block_header = BlockHeader{
Dec 01 11:20:28.955 INFO [stderr]    |                 ----^^^^^^^^^^^^
Dec 01 11:20:28.955 INFO [stderr]    |                 |
Dec 01 11:20:28.955 INFO [stderr]    |                 help: remove this `mut`
Dec 01 11:20:28.955 INFO [stderr]    |
Dec 01 11:20:28.955 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 01 11:20:28.955 INFO [stderr] 
Dec 01 11:20:28.975 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:28.975 INFO [stderr]    --> src/main.rs:210:2
Dec 01 11:20:28.975 INFO [stderr]     |
Dec 01 11:20:28.975 INFO [stderr] 210 |     io::stdout().flush();
Dec 01 11:20:28.975 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:28.975 INFO [stderr]     |
Dec 01 11:20:28.975 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 01 11:20:28.975 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:28.975 INFO [stderr] 
Dec 01 11:20:28.975 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:28.975 INFO [stderr]    --> src/main.rs:211:2
Dec 01 11:20:28.975 INFO [stderr]     |
Dec 01 11:20:28.975 INFO [stderr] 211 |     io::stdin().read_line(&mut miner_address);
Dec 01 11:20:28.975 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:28.975 INFO [stderr]     |
Dec 01 11:20:28.975 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:28.975 INFO [stderr] 
Dec 01 11:20:28.975 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:28.976 INFO [stderr]    --> src/main.rs:213:2
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr] 213 |     io::stdout().flush();
Dec 01 11:20:28.976 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:28.976 INFO [stderr] 
Dec 01 11:20:28.976 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:28.976 INFO [stderr]    --> src/main.rs:214:2
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr] 214 |     io::stdin().read_line(&mut difficulty_string);
Dec 01 11:20:28.976 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:28.976 INFO [stderr] 
Dec 01 11:20:28.976 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:28.976 INFO [stderr]    --> src/main.rs:229:3
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr] 229 |         io::stdout().flush();
Dec 01 11:20:28.976 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:28.976 INFO [stderr] 
Dec 01 11:20:28.976 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:28.976 INFO [stderr]    --> src/main.rs:231:3
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr] 231 |         io::stdin().read_line(&mut choice);
Dec 01 11:20:28.976 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:28.976 INFO [stderr] 
Dec 01 11:20:28.976 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:28.976 INFO [stderr]    --> src/main.rs:247:5
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr] 247 |                 io::stdout().flush();
Dec 01 11:20:28.976 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:28.976 INFO [stderr] 
Dec 01 11:20:28.976 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:28.976 INFO [stderr]    --> src/main.rs:248:5
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr] 248 |                 io::stdin().read_line(&mut sender);
Dec 01 11:20:28.976 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:28.976 INFO [stderr] 
Dec 01 11:20:28.976 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:28.976 INFO [stderr]    --> src/main.rs:250:5
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr] 250 |                 io::stdout().flush();
Dec 01 11:20:28.976 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:28.976 INFO [stderr] 
Dec 01 11:20:28.976 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:28.976 INFO [stderr]    --> src/main.rs:251:5
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr] 251 |                 io::stdin().read_line(&mut recipient);
Dec 01 11:20:28.976 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:28.976 INFO [stderr] 
Dec 01 11:20:28.976 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:28.976 INFO [stderr]    --> src/main.rs:253:5
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr] 253 |                 io::stdout().flush();
Dec 01 11:20:28.976 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:28.976 INFO [stderr] 
Dec 01 11:20:28.976 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:28.976 INFO [stderr]    --> src/main.rs:254:5
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr] 254 |                 io::stdin().read_line(&mut amount);
Dec 01 11:20:28.976 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:28.976 INFO [stderr] 
Dec 01 11:20:28.976 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:28.976 INFO [stderr]    --> src/main.rs:274:5
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr] 274 |                 io::stdout().flush();
Dec 01 11:20:28.976 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.976 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:28.976 INFO [stderr] 
Dec 01 11:20:28.976 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:28.976 INFO [stderr]    --> src/main.rs:275:5
Dec 01 11:20:28.976 INFO [stderr]     |
Dec 01 11:20:28.977 INFO [stderr] 275 |                 io::stdin().read_line(&mut new_difficulty);
Dec 01 11:20:28.977 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:28.977 INFO [stderr]     |
Dec 01 11:20:28.977 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:28.977 INFO [stderr] 
Dec 01 11:20:28.977 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:28.977 INFO [stderr]    --> src/main.rs:286:5
Dec 01 11:20:28.977 INFO [stderr]     |
Dec 01 11:20:28.977 INFO [stderr] 286 |                 io::stdout().flush();
Dec 01 11:20:28.977 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:28.977 INFO [stderr]     |
Dec 01 11:20:28.977 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:28.977 INFO [stderr] 
Dec 01 11:20:28.977 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:28.977 INFO [stderr]    --> src/main.rs:287:5
Dec 01 11:20:28.977 INFO [stderr]     |
Dec 01 11:20:28.977 INFO [stderr] 287 |                 io::stdin().read_line(&mut new_reward);
Dec 01 11:20:28.977 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:28.977 INFO [stderr]     |
Dec 01 11:20:28.977 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:28.977 INFO [stderr] 
Dec 01 11:20:30.254 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.64s
Dec 01 11:20:30.264 INFO [stderr] su: No module specific data is present
Dec 01 11:20:30.929 INFO running `"docker" "inspect" "05ea56ec6f606fbaa234389e6706e2f4477259ed3f0091c58c51dc23361611d5"`
Dec 01 11:20:31.205 INFO running `"docker" "rm" "-f" "05ea56ec6f606fbaa234389e6706e2f4477259ed3f0091c58c51dc23361611d5"`
Dec 01 11:20:31.526 INFO [stdout] 05ea56ec6f606fbaa234389e6706e2f4477259ed3f0091c58c51dc23361611d5
Dec 01 11:20:31.528 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-5/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/beta-1.31-5/1.30.1:/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 +1.30.1 test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 01 11:20:31.907 INFO [stdout] ae6ce87f34b798ac00727a6edfb864c5e3cc113d6ad8dafcfa83cefd08695b9b
Dec 01 11:20:31.908 INFO running `"docker" "start" "-a" "ae6ce87f34b798ac00727a6edfb864c5e3cc113d6ad8dafcfa83cefd08695b9b"`
Dec 01 11:20:33.151 INFO [stderr] usermod: no changes
Dec 01 11:20:33.260 INFO [stderr]    Compiling blockchain-rust v0.1.0 (/source)
Dec 01 11:20:34.257 INFO [stderr] warning: variable does not need to be mutable
Dec 01 11:20:34.257 INFO [stderr]   --> src/main.rs:94:8
Dec 01 11:20:34.257 INFO [stderr]    |
Dec 01 11:20:34.257 INFO [stderr] 94 |             let mut block_header = BlockHeader{
Dec 01 11:20:34.257 INFO [stderr]    |                 ----^^^^^^^^^^^^
Dec 01 11:20:34.257 INFO [stderr]    |                 |
Dec 01 11:20:34.257 INFO [stderr]    |                 help: remove this `mut`
Dec 01 11:20:34.257 INFO [stderr]    |
Dec 01 11:20:34.257 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 01 11:20:34.257 INFO [stderr] 
Dec 01 11:20:34.279 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:34.279 INFO [stderr]    --> src/main.rs:210:2
Dec 01 11:20:34.279 INFO [stderr]     |
Dec 01 11:20:34.279 INFO [stderr] 210 |     io::stdout().flush();
Dec 01 11:20:34.279 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:34.280 INFO [stderr]     |
Dec 01 11:20:34.280 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 01 11:20:34.280 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:34.280 INFO [stderr] 
Dec 01 11:20:34.286 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:34.286 INFO [stderr]    --> src/main.rs:211:2
Dec 01 11:20:34.286 INFO [stderr]     |
Dec 01 11:20:34.286 INFO [stderr] 211 |     io::stdin().read_line(&mut miner_address);
Dec 01 11:20:34.286 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:34.286 INFO [stderr]     |
Dec 01 11:20:34.286 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:34.286 INFO [stderr] 
Dec 01 11:20:34.286 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:34.286 INFO [stderr]    --> src/main.rs:213:2
Dec 01 11:20:34.286 INFO [stderr]     |
Dec 01 11:20:34.286 INFO [stderr] 213 |     io::stdout().flush();
Dec 01 11:20:34.286 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:34.286 INFO [stderr]     |
Dec 01 11:20:34.286 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:34.286 INFO [stderr] 
Dec 01 11:20:34.286 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:34.286 INFO [stderr]    --> src/main.rs:214:2
Dec 01 11:20:34.286 INFO [stderr]     |
Dec 01 11:20:34.286 INFO [stderr] 214 |     io::stdin().read_line(&mut difficulty_string);
Dec 01 11:20:34.286 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:34.286 INFO [stderr]     |
Dec 01 11:20:34.286 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:34.286 INFO [stderr] 
Dec 01 11:20:34.286 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:34.286 INFO [stderr]    --> src/main.rs:229:3
Dec 01 11:20:34.286 INFO [stderr]     |
Dec 01 11:20:34.286 INFO [stderr] 229 |         io::stdout().flush();
Dec 01 11:20:34.286 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:34.286 INFO [stderr]     |
Dec 01 11:20:34.286 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:34.286 INFO [stderr] 
Dec 01 11:20:34.286 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:34.286 INFO [stderr]    --> src/main.rs:231:3
Dec 01 11:20:34.286 INFO [stderr]     |
Dec 01 11:20:34.286 INFO [stderr] 231 |         io::stdin().read_line(&mut choice);
Dec 01 11:20:34.286 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:34.286 INFO [stderr]     |
Dec 01 11:20:34.286 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:34.286 INFO [stderr] 
Dec 01 11:20:34.286 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:34.286 INFO [stderr]    --> src/main.rs:247:5
Dec 01 11:20:34.286 INFO [stderr]     |
Dec 01 11:20:34.286 INFO [stderr] 247 |                 io::stdout().flush();
Dec 01 11:20:34.286 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:34.286 INFO [stderr]     |
Dec 01 11:20:34.286 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:34.286 INFO [stderr] 
Dec 01 11:20:34.286 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:34.286 INFO [stderr]    --> src/main.rs:248:5
Dec 01 11:20:34.286 INFO [stderr]     |
Dec 01 11:20:34.286 INFO [stderr] 248 |                 io::stdin().read_line(&mut sender);
Dec 01 11:20:34.286 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:34.287 INFO [stderr]     |
Dec 01 11:20:34.287 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:34.287 INFO [stderr] 
Dec 01 11:20:34.287 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:34.287 INFO [stderr]    --> src/main.rs:250:5
Dec 01 11:20:34.287 INFO [stderr]     |
Dec 01 11:20:34.287 INFO [stderr] 250 |                 io::stdout().flush();
Dec 01 11:20:34.287 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:34.287 INFO [stderr]     |
Dec 01 11:20:34.287 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:34.287 INFO [stderr] 
Dec 01 11:20:34.287 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:34.287 INFO [stderr]    --> src/main.rs:251:5
Dec 01 11:20:34.287 INFO [stderr]     |
Dec 01 11:20:34.287 INFO [stderr] 251 |                 io::stdin().read_line(&mut recipient);
Dec 01 11:20:34.287 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:34.287 INFO [stderr]     |
Dec 01 11:20:34.287 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:34.287 INFO [stderr] 
Dec 01 11:20:34.287 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:34.287 INFO [stderr]    --> src/main.rs:253:5
Dec 01 11:20:34.287 INFO [stderr]     |
Dec 01 11:20:34.287 INFO [stderr] 253 |                 io::stdout().flush();
Dec 01 11:20:34.287 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:34.287 INFO [stderr]     |
Dec 01 11:20:34.287 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:34.287 INFO [stderr] 
Dec 01 11:20:34.287 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:34.287 INFO [stderr]    --> src/main.rs:254:5
Dec 01 11:20:34.287 INFO [stderr]     |
Dec 01 11:20:34.287 INFO [stderr] 254 |                 io::stdin().read_line(&mut amount);
Dec 01 11:20:34.287 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:34.287 INFO [stderr]     |
Dec 01 11:20:34.287 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:34.287 INFO [stderr] 
Dec 01 11:20:34.287 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:34.287 INFO [stderr]    --> src/main.rs:274:5
Dec 01 11:20:34.287 INFO [stderr]     |
Dec 01 11:20:34.287 INFO [stderr] 274 |                 io::stdout().flush();
Dec 01 11:20:34.287 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:34.287 INFO [stderr]     |
Dec 01 11:20:34.287 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:34.287 INFO [stderr] 
Dec 01 11:20:34.287 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:34.287 INFO [stderr]    --> src/main.rs:275:5
Dec 01 11:20:34.287 INFO [stderr]     |
Dec 01 11:20:34.287 INFO [stderr] 275 |                 io::stdin().read_line(&mut new_difficulty);
Dec 01 11:20:34.287 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:34.287 INFO [stderr]     |
Dec 01 11:20:34.287 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:34.287 INFO [stderr] 
Dec 01 11:20:34.287 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:34.287 INFO [stderr]    --> src/main.rs:286:5
Dec 01 11:20:34.287 INFO [stderr]     |
Dec 01 11:20:34.287 INFO [stderr] 286 |                 io::stdout().flush();
Dec 01 11:20:34.287 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:34.287 INFO [stderr]     |
Dec 01 11:20:34.287 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:34.287 INFO [stderr] 
Dec 01 11:20:34.287 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 11:20:34.287 INFO [stderr]    --> src/main.rs:287:5
Dec 01 11:20:34.287 INFO [stderr]     |
Dec 01 11:20:34.287 INFO [stderr] 287 |                 io::stdin().read_line(&mut new_reward);
Dec 01 11:20:34.287 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:34.287 INFO [stderr]     |
Dec 01 11:20:34.287 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:34.287 INFO [stderr] 
Dec 01 11:20:34.798 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.61s
Dec 01 11:20:34.808 INFO [stderr] su: No module specific data is present
Dec 01 11:20:35.411 INFO running `"docker" "inspect" "ae6ce87f34b798ac00727a6edfb864c5e3cc113d6ad8dafcfa83cefd08695b9b"`
Dec 01 11:20:35.721 INFO running `"docker" "rm" "-f" "ae6ce87f34b798ac00727a6edfb864c5e3cc113d6ad8dafcfa83cefd08695b9b"`
Dec 01 11:20:36.010 INFO [stdout] ae6ce87f34b798ac00727a6edfb864c5e3cc113d6ad8dafcfa83cefd08695b9b
Dec 01 11:20:36.015 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-5/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/beta-1.31-5/1.30.1:/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 +1.30.1 test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 01 11:20:36.503 INFO [stdout] 3aa4558941ce0dc67b23ffd458d90ee2721e13162e19655b841b84ed641c55af
Dec 01 11:20:36.511 INFO running `"docker" "start" "-a" "3aa4558941ce0dc67b23ffd458d90ee2721e13162e19655b841b84ed641c55af"`
Dec 01 11:20:38.542 INFO [stderr] usermod: no changes
Dec 01 11:20:38.651 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
Dec 01 11:20:38.654 INFO [stderr]      Running /target/debug/deps/blockchain_rust-d64270737007b3fe
Dec 01 11:20:38.659 INFO [stdout] 
Dec 01 11:20:38.659 INFO [stdout] running 0 tests
Dec 01 11:20:38.659 INFO [stdout] 
Dec 01 11:20:38.659 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 01 11:20:38.659 INFO [stdout] 
Dec 01 11:20:38.659 INFO [stderr] su: No module specific data is present
Dec 01 11:20:39.699 INFO running `"docker" "inspect" "3aa4558941ce0dc67b23ffd458d90ee2721e13162e19655b841b84ed641c55af"`
Dec 01 11:20:40.148 INFO running `"docker" "rm" "-f" "3aa4558941ce0dc67b23ffd458d90ee2721e13162e19655b841b84ed641c55af"`
Dec 01 11:20:40.455 INFO [stdout] 3aa4558941ce0dc67b23ffd458d90ee2721e13162e19655b841b84ed641c55af
