Dec 01 19:39:43.632 INFO testing dennisfurrer/RustBlockchain against 1.30.1 for beta-1.31-5
Dec 01 19:39:43.632 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 19:39:44.148 INFO [stdout] 7e75ea271e97e5c1ef1bea7cde6c49bad0803ed41b57ee37493974faa368c3d8
Dec 01 19:39:44.151 INFO running `"docker" "start" "-a" "7e75ea271e97e5c1ef1bea7cde6c49bad0803ed41b57ee37493974faa368c3d8"`
Dec 01 19:39:45.212 INFO [stderr] usermod: no changes
Dec 01 19:39:45.293 INFO [stderr]    Compiling blockchain v0.1.0 (/source)
Dec 01 19:39:46.479 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:46.479 INFO [stderr]   --> src/main.rs:18:5
Dec 01 19:39:46.479 INFO [stderr]    |
Dec 01 19:39:46.479 INFO [stderr] 18 |     io::stdout().flush();
Dec 01 19:39:46.479 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:46.479 INFO [stderr]    |
Dec 01 19:39:46.479 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 01 19:39:46.479 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:46.479 INFO [stderr] 
Dec 01 19:39:46.479 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:46.479 INFO [stderr]   --> src/main.rs:19:5
Dec 01 19:39:46.479 INFO [stderr]    |
Dec 01 19:39:46.479 INFO [stderr] 19 |     io::stdin().read_line(&mut miner_address);
Dec 01 19:39:46.479 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:46.479 INFO [stderr]    |
Dec 01 19:39:46.479 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:46.479 INFO [stderr] 
Dec 01 19:39:46.479 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:46.479 INFO [stderr]   --> src/main.rs:21:5
Dec 01 19:39:46.479 INFO [stderr]    |
Dec 01 19:39:46.479 INFO [stderr] 21 |     io::stdout().flush();
Dec 01 19:39:46.479 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:46.479 INFO [stderr]    |
Dec 01 19:39:46.479 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:46.479 INFO [stderr] 
Dec 01 19:39:46.479 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:46.479 INFO [stderr]   --> src/main.rs:22:5
Dec 01 19:39:46.479 INFO [stderr]    |
Dec 01 19:39:46.479 INFO [stderr] 22 |     io::stdin().read_line(&mut difficulty);
Dec 01 19:39:46.479 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:46.479 INFO [stderr]    |
Dec 01 19:39:46.479 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:46.479 INFO [stderr] 
Dec 01 19:39:46.479 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:46.479 INFO [stderr]   --> src/main.rs:38:9
Dec 01 19:39:46.479 INFO [stderr]    |
Dec 01 19:39:46.479 INFO [stderr] 38 |         io::stdout().flush();
Dec 01 19:39:46.479 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:46.479 INFO [stderr]    |
Dec 01 19:39:46.479 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:46.479 INFO [stderr] 
Dec 01 19:39:46.479 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:46.479 INFO [stderr]   --> src/main.rs:40:9
Dec 01 19:39:46.479 INFO [stderr]    |
Dec 01 19:39:46.479 INFO [stderr] 40 |         io::stdin().read_line(&mut choice);
Dec 01 19:39:46.479 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:46.479 INFO [stderr]    |
Dec 01 19:39:46.479 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:46.479 INFO [stderr] 
Dec 01 19:39:46.479 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:46.479 INFO [stderr]   --> src/main.rs:71:17
Dec 01 19:39:46.479 INFO [stderr]    |
Dec 01 19:39:46.479 INFO [stderr] 71 |                 io::stdout().flush();
Dec 01 19:39:46.479 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:46.479 INFO [stderr]    |
Dec 01 19:39:46.479 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:46.479 INFO [stderr] 
Dec 01 19:39:46.479 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:46.479 INFO [stderr]   --> src/main.rs:72:17
Dec 01 19:39:46.479 INFO [stderr]    |
Dec 01 19:39:46.479 INFO [stderr] 72 |                 io::stdin().read_line(&mut from);
Dec 01 19:39:46.479 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:46.479 INFO [stderr]    |
Dec 01 19:39:46.479 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:46.479 INFO [stderr] 
Dec 01 19:39:46.479 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:46.479 INFO [stderr]   --> src/main.rs:74:17
Dec 01 19:39:46.479 INFO [stderr]    |
Dec 01 19:39:46.479 INFO [stderr] 74 |                 io::stdout().flush();
Dec 01 19:39:46.479 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:46.479 INFO [stderr]    |
Dec 01 19:39:46.479 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:46.479 INFO [stderr] 
Dec 01 19:39:46.479 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:46.479 INFO [stderr]   --> src/main.rs:75:17
Dec 01 19:39:46.480 INFO [stderr]    |
Dec 01 19:39:46.480 INFO [stderr] 75 |                 io::stdin().read_line(&mut to);
Dec 01 19:39:46.480 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:46.480 INFO [stderr]    |
Dec 01 19:39:46.480 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:46.480 INFO [stderr] 
Dec 01 19:39:46.480 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:46.480 INFO [stderr]   --> src/main.rs:77:17
Dec 01 19:39:46.480 INFO [stderr]    |
Dec 01 19:39:46.480 INFO [stderr] 77 |                 io::stdout().flush();
Dec 01 19:39:46.480 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:46.480 INFO [stderr]    |
Dec 01 19:39:46.480 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:46.480 INFO [stderr] 
Dec 01 19:39:46.480 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:46.480 INFO [stderr]   --> src/main.rs:78:17
Dec 01 19:39:46.480 INFO [stderr]    |
Dec 01 19:39:46.480 INFO [stderr] 78 |                 io::stdin().read_line(&mut amount);
Dec 01 19:39:46.480 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:46.480 INFO [stderr]    |
Dec 01 19:39:46.480 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:46.480 INFO [stderr] 
Dec 01 19:39:46.480 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:46.480 INFO [stderr]    --> src/main.rs:106:17
Dec 01 19:39:46.480 INFO [stderr]     |
Dec 01 19:39:46.480 INFO [stderr] 106 |                 io::stdout().flush();
Dec 01 19:39:46.480 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:46.480 INFO [stderr]     |
Dec 01 19:39:46.480 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:46.480 INFO [stderr] 
Dec 01 19:39:46.480 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:46.480 INFO [stderr]    --> src/main.rs:107:17
Dec 01 19:39:46.480 INFO [stderr]     |
Dec 01 19:39:46.480 INFO [stderr] 107 |                 io::stdin().read_line(&mut new_diff);
Dec 01 19:39:46.480 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:46.480 INFO [stderr]     |
Dec 01 19:39:46.480 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:46.480 INFO [stderr] 
Dec 01 19:39:46.480 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:46.480 INFO [stderr]    --> src/main.rs:119:17
Dec 01 19:39:46.480 INFO [stderr]     |
Dec 01 19:39:46.480 INFO [stderr] 119 |                 io::stdout().flush();
Dec 01 19:39:46.480 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:46.480 INFO [stderr]     |
Dec 01 19:39:46.480 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:46.480 INFO [stderr] 
Dec 01 19:39:46.480 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:46.480 INFO [stderr]    --> src/main.rs:120:17
Dec 01 19:39:46.480 INFO [stderr]     |
Dec 01 19:39:46.480 INFO [stderr] 120 |                 io::stdin().read_line(&mut new_reward);
Dec 01 19:39:46.480 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:46.480 INFO [stderr]     |
Dec 01 19:39:46.480 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:46.480 INFO [stderr] 
Dec 01 19:39:47.467 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.23s
Dec 01 19:39:47.474 INFO [stderr] su: No module specific data is present
Dec 01 19:39:47.931 INFO running `"docker" "inspect" "7e75ea271e97e5c1ef1bea7cde6c49bad0803ed41b57ee37493974faa368c3d8"`
Dec 01 19:39:48.309 INFO running `"docker" "rm" "-f" "7e75ea271e97e5c1ef1bea7cde6c49bad0803ed41b57ee37493974faa368c3d8"`
Dec 01 19:39:48.599 INFO [stdout] 7e75ea271e97e5c1ef1bea7cde6c49bad0803ed41b57ee37493974faa368c3d8
Dec 01 19:39:48.601 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 19:39:49.043 INFO [stdout] e857f4cfca4b1dd2948aa261064be2084406b40b480d6b9451113ed98762443b
Dec 01 19:39:49.046 INFO running `"docker" "start" "-a" "e857f4cfca4b1dd2948aa261064be2084406b40b480d6b9451113ed98762443b"`
Dec 01 19:39:50.119 INFO [stderr] usermod: no changes
Dec 01 19:39:50.220 INFO [stderr]    Compiling blockchain v0.1.0 (/source)
Dec 01 19:39:51.347 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:51.347 INFO [stderr]   --> src/main.rs:18:5
Dec 01 19:39:51.347 INFO [stderr]    |
Dec 01 19:39:51.347 INFO [stderr] 18 |     io::stdout().flush();
Dec 01 19:39:51.347 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:51.347 INFO [stderr]    |
Dec 01 19:39:51.347 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 01 19:39:51.347 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:51.347 INFO [stderr] 
Dec 01 19:39:51.347 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:51.347 INFO [stderr]   --> src/main.rs:19:5
Dec 01 19:39:51.347 INFO [stderr]    |
Dec 01 19:39:51.347 INFO [stderr] 19 |     io::stdin().read_line(&mut miner_address);
Dec 01 19:39:51.347 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:51.347 INFO [stderr]    |
Dec 01 19:39:51.347 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:51.347 INFO [stderr] 
Dec 01 19:39:51.347 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:51.347 INFO [stderr]   --> src/main.rs:21:5
Dec 01 19:39:51.347 INFO [stderr]    |
Dec 01 19:39:51.347 INFO [stderr] 21 |     io::stdout().flush();
Dec 01 19:39:51.347 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:51.347 INFO [stderr]    |
Dec 01 19:39:51.347 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:51.347 INFO [stderr] 
Dec 01 19:39:51.347 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:51.347 INFO [stderr]   --> src/main.rs:22:5
Dec 01 19:39:51.348 INFO [stderr]    |
Dec 01 19:39:51.348 INFO [stderr] 22 |     io::stdin().read_line(&mut difficulty);
Dec 01 19:39:51.348 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:51.348 INFO [stderr]    |
Dec 01 19:39:51.348 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:51.348 INFO [stderr] 
Dec 01 19:39:51.348 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:51.348 INFO [stderr]   --> src/main.rs:38:9
Dec 01 19:39:51.348 INFO [stderr]    |
Dec 01 19:39:51.348 INFO [stderr] 38 |         io::stdout().flush();
Dec 01 19:39:51.348 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:51.348 INFO [stderr]    |
Dec 01 19:39:51.348 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:51.348 INFO [stderr] 
Dec 01 19:39:51.348 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:51.348 INFO [stderr]   --> src/main.rs:40:9
Dec 01 19:39:51.348 INFO [stderr]    |
Dec 01 19:39:51.348 INFO [stderr] 40 |         io::stdin().read_line(&mut choice);
Dec 01 19:39:51.348 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:51.348 INFO [stderr]    |
Dec 01 19:39:51.348 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:51.348 INFO [stderr] 
Dec 01 19:39:51.348 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:51.348 INFO [stderr]   --> src/main.rs:71:17
Dec 01 19:39:51.348 INFO [stderr]    |
Dec 01 19:39:51.348 INFO [stderr] 71 |                 io::stdout().flush();
Dec 01 19:39:51.348 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:51.348 INFO [stderr]    |
Dec 01 19:39:51.348 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:51.348 INFO [stderr] 
Dec 01 19:39:51.348 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:51.348 INFO [stderr]   --> src/main.rs:72:17
Dec 01 19:39:51.348 INFO [stderr]    |
Dec 01 19:39:51.348 INFO [stderr] 72 |                 io::stdin().read_line(&mut from);
Dec 01 19:39:51.348 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:51.348 INFO [stderr]    |
Dec 01 19:39:51.348 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:51.348 INFO [stderr] 
Dec 01 19:39:51.348 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:51.348 INFO [stderr]   --> src/main.rs:74:17
Dec 01 19:39:51.348 INFO [stderr]    |
Dec 01 19:39:51.348 INFO [stderr] 74 |                 io::stdout().flush();
Dec 01 19:39:51.348 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:51.348 INFO [stderr]    |
Dec 01 19:39:51.348 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:51.348 INFO [stderr] 
Dec 01 19:39:51.348 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:51.348 INFO [stderr]   --> src/main.rs:75:17
Dec 01 19:39:51.348 INFO [stderr]    |
Dec 01 19:39:51.348 INFO [stderr] 75 |                 io::stdin().read_line(&mut to);
Dec 01 19:39:51.348 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:51.348 INFO [stderr]    |
Dec 01 19:39:51.348 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:51.348 INFO [stderr] 
Dec 01 19:39:51.348 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:51.348 INFO [stderr]   --> src/main.rs:77:17
Dec 01 19:39:51.348 INFO [stderr]    |
Dec 01 19:39:51.348 INFO [stderr] 77 |                 io::stdout().flush();
Dec 01 19:39:51.348 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:51.348 INFO [stderr]    |
Dec 01 19:39:51.348 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:51.348 INFO [stderr] 
Dec 01 19:39:51.348 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:51.348 INFO [stderr]   --> src/main.rs:78:17
Dec 01 19:39:51.348 INFO [stderr]    |
Dec 01 19:39:51.348 INFO [stderr] 78 |                 io::stdin().read_line(&mut amount);
Dec 01 19:39:51.348 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:51.348 INFO [stderr]    |
Dec 01 19:39:51.348 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:51.348 INFO [stderr] 
Dec 01 19:39:51.348 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:51.348 INFO [stderr]    --> src/main.rs:106:17
Dec 01 19:39:51.348 INFO [stderr]     |
Dec 01 19:39:51.348 INFO [stderr] 106 |                 io::stdout().flush();
Dec 01 19:39:51.348 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:51.348 INFO [stderr]     |
Dec 01 19:39:51.348 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:51.348 INFO [stderr] 
Dec 01 19:39:51.348 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:51.348 INFO [stderr]    --> src/main.rs:107:17
Dec 01 19:39:51.348 INFO [stderr]     |
Dec 01 19:39:51.348 INFO [stderr] 107 |                 io::stdin().read_line(&mut new_diff);
Dec 01 19:39:51.348 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:51.348 INFO [stderr]     |
Dec 01 19:39:51.348 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:51.348 INFO [stderr] 
Dec 01 19:39:51.348 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:51.348 INFO [stderr]    --> src/main.rs:119:17
Dec 01 19:39:51.348 INFO [stderr]     |
Dec 01 19:39:51.348 INFO [stderr] 119 |                 io::stdout().flush();
Dec 01 19:39:51.349 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:51.349 INFO [stderr]     |
Dec 01 19:39:51.349 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:51.349 INFO [stderr] 
Dec 01 19:39:51.349 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 19:39:51.349 INFO [stderr]    --> src/main.rs:120:17
Dec 01 19:39:51.349 INFO [stderr]     |
Dec 01 19:39:51.349 INFO [stderr] 120 |                 io::stdin().read_line(&mut new_reward);
Dec 01 19:39:51.349 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 19:39:51.349 INFO [stderr]     |
Dec 01 19:39:51.349 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 19:39:51.349 INFO [stderr] 
Dec 01 19:39:51.836 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.69s
Dec 01 19:39:51.841 INFO [stderr] su: No module specific data is present
Dec 01 19:39:52.457 INFO running `"docker" "inspect" "e857f4cfca4b1dd2948aa261064be2084406b40b480d6b9451113ed98762443b"`
Dec 01 19:39:52.652 INFO running `"docker" "rm" "-f" "e857f4cfca4b1dd2948aa261064be2084406b40b480d6b9451113ed98762443b"`
Dec 01 19:39:52.826 INFO [stdout] e857f4cfca4b1dd2948aa261064be2084406b40b480d6b9451113ed98762443b
Dec 01 19:39:52.835 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 19:39:53.239 INFO [stdout] 6ccbbc883d2d2d72e86e7d361aba0e8cfe598413b5877c5c44efb52636d7569a
Dec 01 19:39:53.245 INFO running `"docker" "start" "-a" "6ccbbc883d2d2d72e86e7d361aba0e8cfe598413b5877c5c44efb52636d7569a"`
Dec 01 19:39:54.218 INFO [stderr] usermod: no changes
Dec 01 19:39:54.287 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
Dec 01 19:39:54.315 INFO [stderr]      Running /target/debug/deps/blockchain-46f3af90442ef80e
Dec 01 19:39:54.315 INFO [stdout] 
Dec 01 19:39:54.315 INFO [stderr] su: No module specific data is present
Dec 01 19:39:54.315 INFO [stdout] running 0 tests
Dec 01 19:39:54.315 INFO [stdout] 
Dec 01 19:39:54.315 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 01 19:39:54.315 INFO [stdout] 
Dec 01 19:39:55.083 INFO running `"docker" "inspect" "6ccbbc883d2d2d72e86e7d361aba0e8cfe598413b5877c5c44efb52636d7569a"`
Dec 01 19:39:55.279 INFO running `"docker" "rm" "-f" "6ccbbc883d2d2d72e86e7d361aba0e8cfe598413b5877c5c44efb52636d7569a"`
Dec 01 19:39:55.491 INFO [stdout] 6ccbbc883d2d2d72e86e7d361aba0e8cfe598413b5877c5c44efb52636d7569a
