Dec 01 11:25:55.239 INFO testing lempiy/blockchain against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 01 11:25:55.239 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-3/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/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 11:25:55.752 INFO [stdout] 17874b6c65f85e0eef37d9e71576f31793fff5686320cd61c17dd64241c8a82d
Dec 01 11:25:55.755 INFO running `"docker" "start" "-a" "17874b6c65f85e0eef37d9e71576f31793fff5686320cd61c17dd64241c8a82d"`
Dec 01 11:25:56.786 INFO [stderr] usermod: no changes
Dec 01 11:25:56.947 INFO [stderr]    Compiling serde v1.0.38
Dec 01 11:25:56.951 INFO [stderr]    Compiling serde_derive v1.0.38
Dec 01 11:26:17.574 INFO [stderr]    Compiling serde_json v1.0.14
Dec 01 11:26:21.659 INFO [stderr]    Compiling blockchain v0.1.0 (/source)
Dec 01 11:26:22.521 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:22.521 INFO [stderr]   --> src/main.rs:16:5
Dec 01 11:26:22.521 INFO [stderr]    |
Dec 01 11:26:22.521 INFO [stderr] 16 |     io::stdout().flush();
Dec 01 11:26:22.521 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:22.521 INFO [stderr]    |
Dec 01 11:26:22.521 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 01 11:26:22.521 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:22.521 INFO [stderr] 
Dec 01 11:26:22.521 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:22.521 INFO [stderr]   --> src/main.rs:17:5
Dec 01 11:26:22.521 INFO [stderr]    |
Dec 01 11:26:22.521 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_addr);
Dec 01 11:26:22.521 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:22.521 INFO [stderr]    |
Dec 01 11:26:22.521 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:22.521 INFO [stderr] 
Dec 01 11:26:22.521 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:22.522 INFO [stderr]   --> src/main.rs:20:5
Dec 01 11:26:22.522 INFO [stderr]    |
Dec 01 11:26:22.522 INFO [stderr] 20 |     io::stdout().flush();
Dec 01 11:26:22.522 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:22.522 INFO [stderr]    |
Dec 01 11:26:22.522 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:22.522 INFO [stderr] 
Dec 01 11:26:22.523 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:22.523 INFO [stderr]   --> src/main.rs:21:5
Dec 01 11:26:22.523 INFO [stderr]    |
Dec 01 11:26:22.523 INFO [stderr] 21 |     io::stdin().read_line(&mut difficulty);
Dec 01 11:26:22.523 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:22.523 INFO [stderr]    |
Dec 01 11:26:22.523 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:22.523 INFO [stderr] 
Dec 01 11:26:22.524 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:22.524 INFO [stderr]   --> src/main.rs:36:9
Dec 01 11:26:22.524 INFO [stderr]    |
Dec 01 11:26:22.524 INFO [stderr] 36 |         io::stdout().flush();
Dec 01 11:26:22.524 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:22.524 INFO [stderr]    |
Dec 01 11:26:22.524 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:22.524 INFO [stderr] 
Dec 01 11:26:22.524 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:22.524 INFO [stderr]   --> src/main.rs:38:9
Dec 01 11:26:22.524 INFO [stderr]    |
Dec 01 11:26:22.524 INFO [stderr] 38 |         io::stdin().read_line(&mut choice);
Dec 01 11:26:22.524 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:22.524 INFO [stderr]    |
Dec 01 11:26:22.524 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:22.525 INFO [stderr] 
Dec 01 11:26:22.525 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:22.525 INFO [stderr]   --> src/main.rs:54:17
Dec 01 11:26:22.525 INFO [stderr]    |
Dec 01 11:26:22.525 INFO [stderr] 54 |                 io::stdout().flush();
Dec 01 11:26:22.525 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:22.525 INFO [stderr]    |
Dec 01 11:26:22.525 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:22.525 INFO [stderr] 
Dec 01 11:26:22.525 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:22.525 INFO [stderr]   --> src/main.rs:55:17
Dec 01 11:26:22.525 INFO [stderr]    |
Dec 01 11:26:22.525 INFO [stderr] 55 |                 io::stdin().read_line(&mut sender);
Dec 01 11:26:22.525 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:22.525 INFO [stderr]    |
Dec 01 11:26:22.526 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:22.526 INFO [stderr] 
Dec 01 11:26:22.526 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:22.526 INFO [stderr]   --> src/main.rs:58:17
Dec 01 11:26:22.526 INFO [stderr]    |
Dec 01 11:26:22.526 INFO [stderr] 58 |                 io::stdout().flush();
Dec 01 11:26:22.526 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:22.526 INFO [stderr]    |
Dec 01 11:26:22.526 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:22.526 INFO [stderr] 
Dec 01 11:26:22.526 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:22.526 INFO [stderr]   --> src/main.rs:59:17
Dec 01 11:26:22.526 INFO [stderr]    |
Dec 01 11:26:22.526 INFO [stderr] 59 |                 io::stdin().read_line(&mut reciever);
Dec 01 11:26:22.526 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:22.527 INFO [stderr]    |
Dec 01 11:26:22.527 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:22.527 INFO [stderr] 
Dec 01 11:26:22.527 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:22.527 INFO [stderr]   --> src/main.rs:62:17
Dec 01 11:26:22.527 INFO [stderr]    |
Dec 01 11:26:22.527 INFO [stderr] 62 |                 io::stdout().flush();
Dec 01 11:26:22.527 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:22.527 INFO [stderr]    |
Dec 01 11:26:22.527 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:22.527 INFO [stderr] 
Dec 01 11:26:22.527 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:22.527 INFO [stderr]   --> src/main.rs:63:17
Dec 01 11:26:22.527 INFO [stderr]    |
Dec 01 11:26:22.527 INFO [stderr] 63 |                 io::stdin().read_line(&mut amount);
Dec 01 11:26:22.527 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:22.528 INFO [stderr]    |
Dec 01 11:26:22.528 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:22.528 INFO [stderr] 
Dec 01 11:26:22.528 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:22.528 INFO [stderr]   --> src/main.rs:85:17
Dec 01 11:26:22.528 INFO [stderr]    |
Dec 01 11:26:22.528 INFO [stderr] 85 |                 io::stdout().flush();
Dec 01 11:26:22.528 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:22.528 INFO [stderr]    |
Dec 01 11:26:22.528 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:22.528 INFO [stderr] 
Dec 01 11:26:22.529 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:22.529 INFO [stderr]   --> src/main.rs:86:17
Dec 01 11:26:22.529 INFO [stderr]    |
Dec 01 11:26:22.529 INFO [stderr] 86 |                 io::stdin().read_line(&mut new_diff);
Dec 01 11:26:22.529 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:22.529 INFO [stderr]    |
Dec 01 11:26:22.529 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:22.529 INFO [stderr] 
Dec 01 11:26:22.529 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:22.529 INFO [stderr]   --> src/main.rs:96:17
Dec 01 11:26:22.529 INFO [stderr]    |
Dec 01 11:26:22.529 INFO [stderr] 96 |                 io::stdout().flush();
Dec 01 11:26:22.529 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:22.530 INFO [stderr]    |
Dec 01 11:26:22.530 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:22.530 INFO [stderr] 
Dec 01 11:26:22.530 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:22.530 INFO [stderr]   --> src/main.rs:97:17
Dec 01 11:26:22.530 INFO [stderr]    |
Dec 01 11:26:22.530 INFO [stderr] 97 |                 io::stdin().read_line(&mut new_reward);
Dec 01 11:26:22.530 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:22.535 INFO [stderr]    |
Dec 01 11:26:22.535 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:22.535 INFO [stderr] 
Dec 01 11:26:24.263 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.43s
Dec 01 11:26:24.266 INFO [stderr] su: No module specific data is present
Dec 01 11:26:25.669 INFO running `"docker" "inspect" "17874b6c65f85e0eef37d9e71576f31793fff5686320cd61c17dd64241c8a82d"`
Dec 01 11:26:26.017 INFO running `"docker" "rm" "-f" "17874b6c65f85e0eef37d9e71576f31793fff5686320cd61c17dd64241c8a82d"`
Dec 01 11:26:26.331 INFO [stdout] 17874b6c65f85e0eef37d9e71576f31793fff5686320cd61c17dd64241c8a82d
Dec 01 11:26:26.333 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-3/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/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 11:26:26.847 INFO [stdout] 4d484da7776b257be9c241e4285228fefe5784f7d2101fe697b67a2b8b0d6a00
Dec 01 11:26:26.852 INFO running `"docker" "start" "-a" "4d484da7776b257be9c241e4285228fefe5784f7d2101fe697b67a2b8b0d6a00"`
Dec 01 11:26:28.983 INFO [stderr] usermod: no changes
Dec 01 11:26:29.095 INFO [stderr]    Compiling blockchain v0.1.0 (/source)
Dec 01 11:26:30.003 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:30.003 INFO [stderr]   --> src/main.rs:16:5
Dec 01 11:26:30.003 INFO [stderr]    |
Dec 01 11:26:30.003 INFO [stderr] 16 |     io::stdout().flush();
Dec 01 11:26:30.003 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:30.003 INFO [stderr]    |
Dec 01 11:26:30.003 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 01 11:26:30.003 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:30.003 INFO [stderr] 
Dec 01 11:26:30.003 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:30.003 INFO [stderr]   --> src/main.rs:17:5
Dec 01 11:26:30.003 INFO [stderr]    |
Dec 01 11:26:30.003 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_addr);
Dec 01 11:26:30.003 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:30.003 INFO [stderr]    |
Dec 01 11:26:30.003 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:30.003 INFO [stderr] 
Dec 01 11:26:30.003 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:30.003 INFO [stderr]   --> src/main.rs:20:5
Dec 01 11:26:30.003 INFO [stderr]    |
Dec 01 11:26:30.003 INFO [stderr] 20 |     io::stdout().flush();
Dec 01 11:26:30.003 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:30.003 INFO [stderr]    |
Dec 01 11:26:30.003 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:30.003 INFO [stderr] 
Dec 01 11:26:30.004 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:30.004 INFO [stderr]   --> src/main.rs:21:5
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr] 21 |     io::stdin().read_line(&mut difficulty);
Dec 01 11:26:30.004 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:30.004 INFO [stderr] 
Dec 01 11:26:30.004 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:30.004 INFO [stderr]   --> src/main.rs:36:9
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr] 36 |         io::stdout().flush();
Dec 01 11:26:30.004 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:30.004 INFO [stderr] 
Dec 01 11:26:30.004 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:30.004 INFO [stderr]   --> src/main.rs:38:9
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr] 38 |         io::stdin().read_line(&mut choice);
Dec 01 11:26:30.004 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:30.004 INFO [stderr] 
Dec 01 11:26:30.004 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:30.004 INFO [stderr]   --> src/main.rs:54:17
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr] 54 |                 io::stdout().flush();
Dec 01 11:26:30.004 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:30.004 INFO [stderr] 
Dec 01 11:26:30.004 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:30.004 INFO [stderr]   --> src/main.rs:55:17
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr] 55 |                 io::stdin().read_line(&mut sender);
Dec 01 11:26:30.004 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:30.004 INFO [stderr] 
Dec 01 11:26:30.004 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:30.004 INFO [stderr]   --> src/main.rs:58:17
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr] 58 |                 io::stdout().flush();
Dec 01 11:26:30.004 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:30.004 INFO [stderr] 
Dec 01 11:26:30.004 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:30.004 INFO [stderr]   --> src/main.rs:59:17
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr] 59 |                 io::stdin().read_line(&mut reciever);
Dec 01 11:26:30.004 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:30.004 INFO [stderr] 
Dec 01 11:26:30.004 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:30.004 INFO [stderr]   --> src/main.rs:62:17
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr] 62 |                 io::stdout().flush();
Dec 01 11:26:30.004 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:30.004 INFO [stderr] 
Dec 01 11:26:30.004 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:30.004 INFO [stderr]   --> src/main.rs:63:17
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr] 63 |                 io::stdin().read_line(&mut amount);
Dec 01 11:26:30.004 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:30.004 INFO [stderr] 
Dec 01 11:26:30.004 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:30.004 INFO [stderr]   --> src/main.rs:85:17
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr] 85 |                 io::stdout().flush();
Dec 01 11:26:30.004 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.004 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:30.004 INFO [stderr] 
Dec 01 11:26:30.004 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:30.004 INFO [stderr]   --> src/main.rs:86:17
Dec 01 11:26:30.004 INFO [stderr]    |
Dec 01 11:26:30.005 INFO [stderr] 86 |                 io::stdin().read_line(&mut new_diff);
Dec 01 11:26:30.005 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:30.005 INFO [stderr]    |
Dec 01 11:26:30.005 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:30.005 INFO [stderr] 
Dec 01 11:26:30.005 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:30.005 INFO [stderr]   --> src/main.rs:96:17
Dec 01 11:26:30.005 INFO [stderr]    |
Dec 01 11:26:30.005 INFO [stderr] 96 |                 io::stdout().flush();
Dec 01 11:26:30.005 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:30.005 INFO [stderr]    |
Dec 01 11:26:30.005 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:30.005 INFO [stderr] 
Dec 01 11:26:30.005 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 11:26:30.005 INFO [stderr]   --> src/main.rs:97:17
Dec 01 11:26:30.005 INFO [stderr]    |
Dec 01 11:26:30.005 INFO [stderr] 97 |                 io::stdin().read_line(&mut new_reward);
Dec 01 11:26:30.005 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 11:26:30.005 INFO [stderr]    |
Dec 01 11:26:30.005 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 11:26:30.005 INFO [stderr] 
Dec 01 11:26:30.552 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.55s
Dec 01 11:26:30.557 INFO [stderr] su: No module specific data is present
Dec 01 11:26:31.930 INFO running `"docker" "inspect" "4d484da7776b257be9c241e4285228fefe5784f7d2101fe697b67a2b8b0d6a00"`
Dec 01 11:26:32.273 INFO running `"docker" "rm" "-f" "4d484da7776b257be9c241e4285228fefe5784f7d2101fe697b67a2b8b0d6a00"`
Dec 01 11:26:32.627 INFO [stdout] 4d484da7776b257be9c241e4285228fefe5784f7d2101fe697b67a2b8b0d6a00
Dec 01 11:26:32.635 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-3/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/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 11:26:33.189 INFO [stdout] d9b67bb2fe83b0abd01c198abd145f805b67ca0f75625792cbc436450d9e78c8
Dec 01 11:26:33.191 INFO running `"docker" "start" "-a" "d9b67bb2fe83b0abd01c198abd145f805b67ca0f75625792cbc436450d9e78c8"`
Dec 01 11:26:35.511 INFO [stderr] usermod: no changes
Dec 01 11:26:35.703 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.16s
Dec 01 11:26:35.711 INFO [stderr]      Running /target/debug/deps/blockchain-76ee14b506b9b0c3
Dec 01 11:26:35.723 INFO [stdout] 
Dec 01 11:26:35.723 INFO [stdout] running 0 tests
Dec 01 11:26:35.723 INFO [stdout] 
Dec 01 11:26:35.723 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 01 11:26:35.723 INFO [stdout] 
Dec 01 11:26:35.733 INFO [stderr] su: No module specific data is present
Dec 01 11:26:37.345 INFO running `"docker" "inspect" "d9b67bb2fe83b0abd01c198abd145f805b67ca0f75625792cbc436450d9e78c8"`
Dec 01 11:26:37.739 INFO running `"docker" "rm" "-f" "d9b67bb2fe83b0abd01c198abd145f805b67ca0f75625792cbc436450d9e78c8"`
Dec 01 11:26:38.131 INFO [stdout] d9b67bb2fe83b0abd01c198abd145f805b67ca0f75625792cbc436450d9e78c8
