Dec 01 11:20:20.236 INFO testing lezwon/Blockchain-from-Scratch against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 01 11:20:20.236 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-1/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/beta-1.31-5/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/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 +8940af3cea4a9a9deabcaf843b2f8cad9a83fc61-alt 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 11:20:20.816 INFO [stdout] 581f3487fedcb5d05fa22a77f9bd9c1872fe9686d6d988d6442e539f3c4cafd4
Dec 01 11:20:20.818 INFO running `"docker" "start" "-a" "581f3487fedcb5d05fa22a77f9bd9c1872fe9686d6d988d6442e539f3c4cafd4"`
Dec 01 11:20:22.171 INFO [stderr] usermod: no changes
Dec 01 11:20:22.291 INFO [stderr]    Compiling blockchain-rust v0.1.0 (/source)
Dec 01 11:20:23.260 INFO [stderr] warning: variable does not need to be mutable
Dec 01 11:20:23.260 INFO [stderr]   --> src/main.rs:94:8
Dec 01 11:20:23.260 INFO [stderr]    |
Dec 01 11:20:23.260 INFO [stderr] 94 |             let mut block_header = BlockHeader{
Dec 01 11:20:23.260 INFO [stderr]    |                 ----^^^^^^^^^^^^
Dec 01 11:20:23.260 INFO [stderr]    |                 |
Dec 01 11:20:23.260 INFO [stderr]    |                 help: remove this `mut`
Dec 01 11:20:23.260 INFO [stderr]    |
Dec 01 11:20:23.260 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 01 11:20:23.260 INFO [stderr] 
Dec 01 11:20:23.292 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:23.292 INFO [stderr]    --> src/main.rs:210:2
Dec 01 11:20:23.292 INFO [stderr]     |
Dec 01 11:20:23.292 INFO [stderr] 210 |     io::stdout().flush();
Dec 01 11:20:23.292 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:23.292 INFO [stderr]     |
Dec 01 11:20:23.292 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 01 11:20:23.292 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:23.292 INFO [stderr] 
Dec 01 11:20:23.292 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:23.292 INFO [stderr]    --> src/main.rs:211:2
Dec 01 11:20:23.292 INFO [stderr]     |
Dec 01 11:20:23.292 INFO [stderr] 211 |     io::stdin().read_line(&mut miner_address);
Dec 01 11:20:23.292 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:23.292 INFO [stderr]     |
Dec 01 11:20:23.292 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:23.292 INFO [stderr] 
Dec 01 11:20:23.292 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:23.292 INFO [stderr]    --> src/main.rs:213:2
Dec 01 11:20:23.292 INFO [stderr]     |
Dec 01 11:20:23.292 INFO [stderr] 213 |     io::stdout().flush();
Dec 01 11:20:23.292 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:23.292 INFO [stderr]     |
Dec 01 11:20:23.292 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:23.292 INFO [stderr] 
Dec 01 11:20:23.292 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:23.292 INFO [stderr]    --> src/main.rs:214:2
Dec 01 11:20:23.292 INFO [stderr]     |
Dec 01 11:20:23.292 INFO [stderr] 214 |     io::stdin().read_line(&mut difficulty_string);
Dec 01 11:20:23.292 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:23.293 INFO [stderr] 
Dec 01 11:20:23.293 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:23.293 INFO [stderr]    --> src/main.rs:229:3
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr] 229 |         io::stdout().flush();
Dec 01 11:20:23.293 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:23.293 INFO [stderr] 
Dec 01 11:20:23.293 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:23.293 INFO [stderr]    --> src/main.rs:231:3
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr] 231 |         io::stdin().read_line(&mut choice);
Dec 01 11:20:23.293 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:23.293 INFO [stderr] 
Dec 01 11:20:23.293 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:23.293 INFO [stderr]    --> src/main.rs:247:5
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr] 247 |                 io::stdout().flush();
Dec 01 11:20:23.293 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:23.293 INFO [stderr] 
Dec 01 11:20:23.293 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:23.293 INFO [stderr]    --> src/main.rs:248:5
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr] 248 |                 io::stdin().read_line(&mut sender);
Dec 01 11:20:23.293 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:23.293 INFO [stderr] 
Dec 01 11:20:23.293 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:23.293 INFO [stderr]    --> src/main.rs:250:5
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr] 250 |                 io::stdout().flush();
Dec 01 11:20:23.293 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:23.293 INFO [stderr] 
Dec 01 11:20:23.293 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:23.293 INFO [stderr]    --> src/main.rs:251:5
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr] 251 |                 io::stdin().read_line(&mut recipient);
Dec 01 11:20:23.293 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:23.293 INFO [stderr] 
Dec 01 11:20:23.293 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:23.293 INFO [stderr]    --> src/main.rs:253:5
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr] 253 |                 io::stdout().flush();
Dec 01 11:20:23.293 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:23.293 INFO [stderr] 
Dec 01 11:20:23.293 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:23.293 INFO [stderr]    --> src/main.rs:254:5
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr] 254 |                 io::stdin().read_line(&mut amount);
Dec 01 11:20:23.293 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:23.293 INFO [stderr] 
Dec 01 11:20:23.293 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:23.293 INFO [stderr]    --> src/main.rs:274:5
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr] 274 |                 io::stdout().flush();
Dec 01 11:20:23.293 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:23.293 INFO [stderr] 
Dec 01 11:20:23.293 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:23.293 INFO [stderr]    --> src/main.rs:275:5
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr] 275 |                 io::stdin().read_line(&mut new_difficulty);
Dec 01 11:20:23.293 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.293 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:23.293 INFO [stderr] 
Dec 01 11:20:23.293 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:23.293 INFO [stderr]    --> src/main.rs:286:5
Dec 01 11:20:23.293 INFO [stderr]     |
Dec 01 11:20:23.294 INFO [stderr] 286 |                 io::stdout().flush();
Dec 01 11:20:23.294 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:23.294 INFO [stderr]     |
Dec 01 11:20:23.294 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:23.294 INFO [stderr] 
Dec 01 11:20:23.294 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:23.294 INFO [stderr]    --> src/main.rs:287:5
Dec 01 11:20:23.294 INFO [stderr]     |
Dec 01 11:20:23.294 INFO [stderr] 287 |                 io::stdin().read_line(&mut new_reward);
Dec 01 11:20:23.294 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:23.294 INFO [stderr]     |
Dec 01 11:20:23.294 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:23.294 INFO [stderr] 
Dec 01 11:20:24.840 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.64s
Dec 01 11:20:24.858 INFO [stderr] su: No module specific data is present
Dec 01 11:20:25.649 INFO running `"docker" "inspect" "581f3487fedcb5d05fa22a77f9bd9c1872fe9686d6d988d6442e539f3c4cafd4"`
Dec 01 11:20:25.903 INFO running `"docker" "rm" "-f" "581f3487fedcb5d05fa22a77f9bd9c1872fe9686d6d988d6442e539f3c4cafd4"`
Dec 01 11:20:26.203 INFO [stdout] 581f3487fedcb5d05fa22a77f9bd9c1872fe9686d6d988d6442e539f3c4cafd4
Dec 01 11:20:26.217 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-1/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/beta-1.31-5/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/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 +8940af3cea4a9a9deabcaf843b2f8cad9a83fc61-alt 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 11:20:26.823 INFO [stdout] 3706607f464648a00ff9146b8149911df1702414fa3f41696194c9eb92bac650
Dec 01 11:20:26.827 INFO running `"docker" "start" "-a" "3706607f464648a00ff9146b8149911df1702414fa3f41696194c9eb92bac650"`
Dec 01 11:20:28.070 INFO [stderr] usermod: no changes
Dec 01 11:20:28.199 INFO [stderr]    Compiling blockchain-rust v0.1.0 (/source)
Dec 01 11:20:29.011 INFO [stderr] warning: variable does not need to be mutable
Dec 01 11:20:29.011 INFO [stderr]   --> src/main.rs:94:8
Dec 01 11:20:29.011 INFO [stderr]    |
Dec 01 11:20:29.011 INFO [stderr] 94 |             let mut block_header = BlockHeader{
Dec 01 11:20:29.011 INFO [stderr]    |                 ----^^^^^^^^^^^^
Dec 01 11:20:29.011 INFO [stderr]    |                 |
Dec 01 11:20:29.011 INFO [stderr]    |                 help: remove this `mut`
Dec 01 11:20:29.011 INFO [stderr]    |
Dec 01 11:20:29.011 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 01 11:20:29.011 INFO [stderr] 
Dec 01 11:20:29.023 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:29.023 INFO [stderr]    --> src/main.rs:210:2
Dec 01 11:20:29.023 INFO [stderr]     |
Dec 01 11:20:29.023 INFO [stderr] 210 |     io::stdout().flush();
Dec 01 11:20:29.023 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:29.023 INFO [stderr]     |
Dec 01 11:20:29.023 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 01 11:20:29.023 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:29.023 INFO [stderr] 
Dec 01 11:20:29.023 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:29.023 INFO [stderr]    --> src/main.rs:211:2
Dec 01 11:20:29.023 INFO [stderr]     |
Dec 01 11:20:29.023 INFO [stderr] 211 |     io::stdin().read_line(&mut miner_address);
Dec 01 11:20:29.023 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:29.023 INFO [stderr]     |
Dec 01 11:20:29.023 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:29.023 INFO [stderr] 
Dec 01 11:20:29.023 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:29.023 INFO [stderr]    --> src/main.rs:213:2
Dec 01 11:20:29.023 INFO [stderr]     |
Dec 01 11:20:29.023 INFO [stderr] 213 |     io::stdout().flush();
Dec 01 11:20:29.023 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:29.023 INFO [stderr]     |
Dec 01 11:20:29.023 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:29.023 INFO [stderr] 
Dec 01 11:20:29.023 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:29.023 INFO [stderr]    --> src/main.rs:214:2
Dec 01 11:20:29.023 INFO [stderr]     |
Dec 01 11:20:29.023 INFO [stderr] 214 |     io::stdin().read_line(&mut difficulty_string);
Dec 01 11:20:29.023 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:29.023 INFO [stderr]     |
Dec 01 11:20:29.023 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:29.024 INFO [stderr] 
Dec 01 11:20:29.024 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:29.024 INFO [stderr]    --> src/main.rs:229:3
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr] 229 |         io::stdout().flush();
Dec 01 11:20:29.024 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:29.024 INFO [stderr] 
Dec 01 11:20:29.024 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:29.024 INFO [stderr]    --> src/main.rs:231:3
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr] 231 |         io::stdin().read_line(&mut choice);
Dec 01 11:20:29.024 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:29.024 INFO [stderr] 
Dec 01 11:20:29.024 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:29.024 INFO [stderr]    --> src/main.rs:247:5
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr] 247 |                 io::stdout().flush();
Dec 01 11:20:29.024 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:29.024 INFO [stderr] 
Dec 01 11:20:29.024 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:29.024 INFO [stderr]    --> src/main.rs:248:5
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr] 248 |                 io::stdin().read_line(&mut sender);
Dec 01 11:20:29.024 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:29.024 INFO [stderr] 
Dec 01 11:20:29.024 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:29.024 INFO [stderr]    --> src/main.rs:250:5
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr] 250 |                 io::stdout().flush();
Dec 01 11:20:29.024 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:29.024 INFO [stderr] 
Dec 01 11:20:29.024 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:29.024 INFO [stderr]    --> src/main.rs:251:5
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr] 251 |                 io::stdin().read_line(&mut recipient);
Dec 01 11:20:29.024 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:29.024 INFO [stderr] 
Dec 01 11:20:29.024 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:29.024 INFO [stderr]    --> src/main.rs:253:5
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr] 253 |                 io::stdout().flush();
Dec 01 11:20:29.024 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:29.024 INFO [stderr] 
Dec 01 11:20:29.024 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:29.024 INFO [stderr]    --> src/main.rs:254:5
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr] 254 |                 io::stdin().read_line(&mut amount);
Dec 01 11:20:29.024 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:29.024 INFO [stderr] 
Dec 01 11:20:29.024 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:29.024 INFO [stderr]    --> src/main.rs:274:5
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr] 274 |                 io::stdout().flush();
Dec 01 11:20:29.024 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:29.024 INFO [stderr] 
Dec 01 11:20:29.024 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:29.024 INFO [stderr]    --> src/main.rs:275:5
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr] 275 |                 io::stdin().read_line(&mut new_difficulty);
Dec 01 11:20:29.024 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:29.024 INFO [stderr] 
Dec 01 11:20:29.024 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:29.024 INFO [stderr]    --> src/main.rs:286:5
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr] 286 |                 io::stdout().flush();
Dec 01 11:20:29.024 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:29.024 INFO [stderr]     |
Dec 01 11:20:29.024 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:29.024 INFO [stderr] 
Dec 01 11:20:29.025 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:20:29.025 INFO [stderr]    --> src/main.rs:287:5
Dec 01 11:20:29.025 INFO [stderr]     |
Dec 01 11:20:29.025 INFO [stderr] 287 |                 io::stdin().read_line(&mut new_reward);
Dec 01 11:20:29.025 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:20:29.025 INFO [stderr]     |
Dec 01 11:20:29.025 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:20:29.025 INFO [stderr] 
Dec 01 11:20:29.539 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.44s
Dec 01 11:20:29.541 INFO [stderr] su: No module specific data is present
Dec 01 11:20:30.275 INFO running `"docker" "inspect" "3706607f464648a00ff9146b8149911df1702414fa3f41696194c9eb92bac650"`
Dec 01 11:20:30.539 INFO running `"docker" "rm" "-f" "3706607f464648a00ff9146b8149911df1702414fa3f41696194c9eb92bac650"`
Dec 01 11:20:30.833 INFO [stdout] 3706607f464648a00ff9146b8149911df1702414fa3f41696194c9eb92bac650
Dec 01 11:20:30.837 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-1/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/beta-1.31-5/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/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 +8940af3cea4a9a9deabcaf843b2f8cad9a83fc61-alt 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 11:20:31.319 INFO [stdout] 229550d27e75c2d7367eb25b866b2db4e9eefaa4203a538f18ec810cc33b21da
Dec 01 11:20:31.329 INFO running `"docker" "start" "-a" "229550d27e75c2d7367eb25b866b2db4e9eefaa4203a538f18ec810cc33b21da"`
Dec 01 11:20:32.343 INFO [stderr] usermod: no changes
Dec 01 11:20:32.447 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
Dec 01 11:20:32.471 INFO [stderr]      Running /target/debug/deps/blockchain_rust-76e69bc02cf95336
Dec 01 11:20:32.471 INFO [stdout] 
Dec 01 11:20:32.471 INFO [stdout] running 0 tests
Dec 01 11:20:32.471 INFO [stdout] 
Dec 01 11:20:32.471 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 01 11:20:32.471 INFO [stdout] 
Dec 01 11:20:32.471 INFO [stderr] su: No module specific data is present
Dec 01 11:20:33.199 INFO running `"docker" "inspect" "229550d27e75c2d7367eb25b866b2db4e9eefaa4203a538f18ec810cc33b21da"`
Dec 01 11:20:33.477 INFO running `"docker" "rm" "-f" "229550d27e75c2d7367eb25b866b2db4e9eefaa4203a538f18ec810cc33b21da"`
Dec 01 11:20:33.811 INFO [stdout] 229550d27e75c2d7367eb25b866b2db4e9eefaa4203a538f18ec810cc33b21da
