Dec 06 01:53:25.094 INFO testing dennisfurrer/RustBlockchain against master#906deae0790bd18681b937fe9a141a3c26cf1855 for pr-56514
Dec 06 01:53:25.094 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-3/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 06 01:53:25.428 INFO [stdout] e33b0356fa5ccd96a879056b148b2f9781a449db5278dd49b6b8d76b73ca4b96
Dec 06 01:53:25.434 INFO running `"docker" "start" "-a" "e33b0356fa5ccd96a879056b148b2f9781a449db5278dd49b6b8d76b73ca4b96"`
Dec 06 01:53:26.826 INFO [stderr] usermod: no changes
Dec 06 01:53:26.988 INFO [stderr]    Compiling blockchain v0.1.0 (/source)
Dec 06 01:53:28.216 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:28.216 INFO [stderr]   --> src/main.rs:18:5
Dec 06 01:53:28.216 INFO [stderr]    |
Dec 06 01:53:28.216 INFO [stderr] 18 |     io::stdout().flush();
Dec 06 01:53:28.216 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:28.216 INFO [stderr]    |
Dec 06 01:53:28.216 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 06 01:53:28.216 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:28.216 INFO [stderr] 
Dec 06 01:53:28.216 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:28.216 INFO [stderr]   --> src/main.rs:19:5
Dec 06 01:53:28.217 INFO [stderr]    |
Dec 06 01:53:28.217 INFO [stderr] 19 |     io::stdin().read_line(&mut miner_address);
Dec 06 01:53:28.217 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:28.217 INFO [stderr]    |
Dec 06 01:53:28.217 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:28.217 INFO [stderr] 
Dec 06 01:53:28.217 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:28.217 INFO [stderr]   --> src/main.rs:21:5
Dec 06 01:53:28.217 INFO [stderr]    |
Dec 06 01:53:28.217 INFO [stderr] 21 |     io::stdout().flush();
Dec 06 01:53:28.217 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:28.217 INFO [stderr]    |
Dec 06 01:53:28.217 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:28.217 INFO [stderr] 
Dec 06 01:53:28.217 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:28.217 INFO [stderr]   --> src/main.rs:22:5
Dec 06 01:53:28.217 INFO [stderr]    |
Dec 06 01:53:28.217 INFO [stderr] 22 |     io::stdin().read_line(&mut difficulty);
Dec 06 01:53:28.217 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:28.217 INFO [stderr]    |
Dec 06 01:53:28.217 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:28.217 INFO [stderr] 
Dec 06 01:53:28.217 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:28.218 INFO [stderr]   --> src/main.rs:38:9
Dec 06 01:53:28.218 INFO [stderr]    |
Dec 06 01:53:28.218 INFO [stderr] 38 |         io::stdout().flush();
Dec 06 01:53:28.218 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:28.218 INFO [stderr]    |
Dec 06 01:53:28.218 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:28.218 INFO [stderr] 
Dec 06 01:53:28.218 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:28.218 INFO [stderr]   --> src/main.rs:40:9
Dec 06 01:53:28.218 INFO [stderr]    |
Dec 06 01:53:28.218 INFO [stderr] 40 |         io::stdin().read_line(&mut choice);
Dec 06 01:53:28.218 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:28.218 INFO [stderr]    |
Dec 06 01:53:28.218 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:28.218 INFO [stderr] 
Dec 06 01:53:28.218 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:28.218 INFO [stderr]   --> src/main.rs:71:17
Dec 06 01:53:28.218 INFO [stderr]    |
Dec 06 01:53:28.218 INFO [stderr] 71 |                 io::stdout().flush();
Dec 06 01:53:28.218 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:28.218 INFO [stderr]    |
Dec 06 01:53:28.218 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:28.218 INFO [stderr] 
Dec 06 01:53:28.218 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:28.218 INFO [stderr]   --> src/main.rs:72:17
Dec 06 01:53:28.218 INFO [stderr]    |
Dec 06 01:53:28.218 INFO [stderr] 72 |                 io::stdin().read_line(&mut from);
Dec 06 01:53:28.218 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:28.218 INFO [stderr]    |
Dec 06 01:53:28.218 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:28.218 INFO [stderr] 
Dec 06 01:53:28.218 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:28.218 INFO [stderr]   --> src/main.rs:74:17
Dec 06 01:53:28.218 INFO [stderr]    |
Dec 06 01:53:28.218 INFO [stderr] 74 |                 io::stdout().flush();
Dec 06 01:53:28.218 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:28.218 INFO [stderr]    |
Dec 06 01:53:28.218 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:28.218 INFO [stderr] 
Dec 06 01:53:28.228 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:28.228 INFO [stderr]   --> src/main.rs:75:17
Dec 06 01:53:28.228 INFO [stderr]    |
Dec 06 01:53:28.228 INFO [stderr] 75 |                 io::stdin().read_line(&mut to);
Dec 06 01:53:28.228 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:28.228 INFO [stderr]    |
Dec 06 01:53:28.228 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:28.229 INFO [stderr] 
Dec 06 01:53:28.229 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:28.229 INFO [stderr]   --> src/main.rs:77:17
Dec 06 01:53:28.229 INFO [stderr]    |
Dec 06 01:53:28.229 INFO [stderr] 77 |                 io::stdout().flush();
Dec 06 01:53:28.229 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:28.229 INFO [stderr]    |
Dec 06 01:53:28.229 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:28.229 INFO [stderr] 
Dec 06 01:53:28.229 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:28.229 INFO [stderr]   --> src/main.rs:78:17
Dec 06 01:53:28.229 INFO [stderr]    |
Dec 06 01:53:28.229 INFO [stderr] 78 |                 io::stdin().read_line(&mut amount);
Dec 06 01:53:28.229 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:28.229 INFO [stderr]    |
Dec 06 01:53:28.229 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:28.230 INFO [stderr] 
Dec 06 01:53:28.230 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:28.230 INFO [stderr]    --> src/main.rs:106:17
Dec 06 01:53:28.230 INFO [stderr]     |
Dec 06 01:53:28.230 INFO [stderr] 106 |                 io::stdout().flush();
Dec 06 01:53:28.230 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:28.230 INFO [stderr]     |
Dec 06 01:53:28.230 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:28.230 INFO [stderr] 
Dec 06 01:53:28.230 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:28.230 INFO [stderr]    --> src/main.rs:107:17
Dec 06 01:53:28.230 INFO [stderr]     |
Dec 06 01:53:28.230 INFO [stderr] 107 |                 io::stdin().read_line(&mut new_diff);
Dec 06 01:53:28.230 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:28.231 INFO [stderr]     |
Dec 06 01:53:28.231 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:28.231 INFO [stderr] 
Dec 06 01:53:28.231 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:28.231 INFO [stderr]    --> src/main.rs:119:17
Dec 06 01:53:28.231 INFO [stderr]     |
Dec 06 01:53:28.231 INFO [stderr] 119 |                 io::stdout().flush();
Dec 06 01:53:28.232 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:28.232 INFO [stderr]     |
Dec 06 01:53:28.232 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:28.232 INFO [stderr] 
Dec 06 01:53:28.232 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:28.232 INFO [stderr]    --> src/main.rs:120:17
Dec 06 01:53:28.233 INFO [stderr]     |
Dec 06 01:53:28.233 INFO [stderr] 120 |                 io::stdin().read_line(&mut new_reward);
Dec 06 01:53:28.233 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:28.233 INFO [stderr]     |
Dec 06 01:53:28.233 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:28.233 INFO [stderr] 
Dec 06 01:53:29.040 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.18s
Dec 06 01:53:29.045 INFO [stderr] su: No module specific data is present
Dec 06 01:53:29.290 INFO running `"docker" "inspect" "e33b0356fa5ccd96a879056b148b2f9781a449db5278dd49b6b8d76b73ca4b96"`
Dec 06 01:53:29.370 INFO running `"docker" "rm" "-f" "e33b0356fa5ccd96a879056b148b2f9781a449db5278dd49b6b8d76b73ca4b96"`
Dec 06 01:53:29.458 INFO [stdout] e33b0356fa5ccd96a879056b148b2f9781a449db5278dd49b6b8d76b73ca4b96
Dec 06 01:53:29.460 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-3/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-alt test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 06 01:53:29.668 INFO [stdout] 764394a63b6abee7b01b227440bd6d94044bb09793ad27a5c89af63722c21a58
Dec 06 01:53:29.670 INFO running `"docker" "start" "-a" "764394a63b6abee7b01b227440bd6d94044bb09793ad27a5c89af63722c21a58"`
Dec 06 01:53:30.004 INFO [stderr] usermod: no changes
Dec 06 01:53:30.062 INFO [stderr]    Compiling blockchain v0.1.0 (/source)
Dec 06 01:53:30.897 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:30.897 INFO [stderr]   --> src/main.rs:18:5
Dec 06 01:53:30.897 INFO [stderr]    |
Dec 06 01:53:30.897 INFO [stderr] 18 |     io::stdout().flush();
Dec 06 01:53:30.897 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:30.897 INFO [stderr]    |
Dec 06 01:53:30.897 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 06 01:53:30.897 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:30.897 INFO [stderr] 
Dec 06 01:53:30.897 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:30.897 INFO [stderr]   --> src/main.rs:19:5
Dec 06 01:53:30.897 INFO [stderr]    |
Dec 06 01:53:30.897 INFO [stderr] 19 |     io::stdin().read_line(&mut miner_address);
Dec 06 01:53:30.897 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:30.897 INFO [stderr]    |
Dec 06 01:53:30.897 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:30.897 INFO [stderr] 
Dec 06 01:53:30.897 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:30.897 INFO [stderr]   --> src/main.rs:21:5
Dec 06 01:53:30.897 INFO [stderr]    |
Dec 06 01:53:30.897 INFO [stderr] 21 |     io::stdout().flush();
Dec 06 01:53:30.897 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:30.897 INFO [stderr]    |
Dec 06 01:53:30.897 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:30.897 INFO [stderr] 
Dec 06 01:53:30.897 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:30.897 INFO [stderr]   --> src/main.rs:22:5
Dec 06 01:53:30.897 INFO [stderr]    |
Dec 06 01:53:30.897 INFO [stderr] 22 |     io::stdin().read_line(&mut difficulty);
Dec 06 01:53:30.897 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:30.897 INFO [stderr]    |
Dec 06 01:53:30.897 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:30.897 INFO [stderr] 
Dec 06 01:53:30.897 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:30.897 INFO [stderr]   --> src/main.rs:38:9
Dec 06 01:53:30.897 INFO [stderr]    |
Dec 06 01:53:30.897 INFO [stderr] 38 |         io::stdout().flush();
Dec 06 01:53:30.897 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:30.897 INFO [stderr]    |
Dec 06 01:53:30.897 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:30.897 INFO [stderr] 
Dec 06 01:53:30.897 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:30.897 INFO [stderr]   --> src/main.rs:40:9
Dec 06 01:53:30.897 INFO [stderr]    |
Dec 06 01:53:30.897 INFO [stderr] 40 |         io::stdin().read_line(&mut choice);
Dec 06 01:53:30.897 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:30.897 INFO [stderr]    |
Dec 06 01:53:30.897 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:30.897 INFO [stderr] 
Dec 06 01:53:30.897 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:30.897 INFO [stderr]   --> src/main.rs:71:17
Dec 06 01:53:30.897 INFO [stderr]    |
Dec 06 01:53:30.897 INFO [stderr] 71 |                 io::stdout().flush();
Dec 06 01:53:30.897 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:30.897 INFO [stderr]    |
Dec 06 01:53:30.897 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:30.897 INFO [stderr] 
Dec 06 01:53:30.897 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:30.897 INFO [stderr]   --> src/main.rs:72:17
Dec 06 01:53:30.897 INFO [stderr]    |
Dec 06 01:53:30.897 INFO [stderr] 72 |                 io::stdin().read_line(&mut from);
Dec 06 01:53:30.897 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:30.897 INFO [stderr]    |
Dec 06 01:53:30.897 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:30.898 INFO [stderr] 
Dec 06 01:53:30.898 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:30.898 INFO [stderr]   --> src/main.rs:74:17
Dec 06 01:53:30.898 INFO [stderr]    |
Dec 06 01:53:30.898 INFO [stderr] 74 |                 io::stdout().flush();
Dec 06 01:53:30.898 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:30.898 INFO [stderr]    |
Dec 06 01:53:30.898 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:30.898 INFO [stderr] 
Dec 06 01:53:30.898 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:30.898 INFO [stderr]   --> src/main.rs:75:17
Dec 06 01:53:30.898 INFO [stderr]    |
Dec 06 01:53:30.898 INFO [stderr] 75 |                 io::stdin().read_line(&mut to);
Dec 06 01:53:30.898 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:30.898 INFO [stderr]    |
Dec 06 01:53:30.898 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:30.898 INFO [stderr] 
Dec 06 01:53:30.898 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:30.898 INFO [stderr]   --> src/main.rs:77:17
Dec 06 01:53:30.898 INFO [stderr]    |
Dec 06 01:53:30.898 INFO [stderr] 77 |                 io::stdout().flush();
Dec 06 01:53:30.898 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:30.898 INFO [stderr]    |
Dec 06 01:53:30.898 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:30.898 INFO [stderr] 
Dec 06 01:53:30.898 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:30.898 INFO [stderr]   --> src/main.rs:78:17
Dec 06 01:53:30.898 INFO [stderr]    |
Dec 06 01:53:30.898 INFO [stderr] 78 |                 io::stdin().read_line(&mut amount);
Dec 06 01:53:30.898 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:30.898 INFO [stderr]    |
Dec 06 01:53:30.898 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:30.898 INFO [stderr] 
Dec 06 01:53:30.898 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:30.898 INFO [stderr]    --> src/main.rs:106:17
Dec 06 01:53:30.898 INFO [stderr]     |
Dec 06 01:53:30.898 INFO [stderr] 106 |                 io::stdout().flush();
Dec 06 01:53:30.898 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:30.898 INFO [stderr]     |
Dec 06 01:53:30.898 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:30.898 INFO [stderr] 
Dec 06 01:53:30.898 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:30.898 INFO [stderr]    --> src/main.rs:107:17
Dec 06 01:53:30.898 INFO [stderr]     |
Dec 06 01:53:30.898 INFO [stderr] 107 |                 io::stdin().read_line(&mut new_diff);
Dec 06 01:53:30.898 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:30.898 INFO [stderr]     |
Dec 06 01:53:30.898 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:30.898 INFO [stderr] 
Dec 06 01:53:30.898 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:30.898 INFO [stderr]    --> src/main.rs:119:17
Dec 06 01:53:30.898 INFO [stderr]     |
Dec 06 01:53:30.898 INFO [stderr] 119 |                 io::stdout().flush();
Dec 06 01:53:30.898 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:30.898 INFO [stderr]     |
Dec 06 01:53:30.898 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:30.898 INFO [stderr] 
Dec 06 01:53:30.898 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 01:53:30.898 INFO [stderr]    --> src/main.rs:120:17
Dec 06 01:53:30.898 INFO [stderr]     |
Dec 06 01:53:30.898 INFO [stderr] 120 |                 io::stdin().read_line(&mut new_reward);
Dec 06 01:53:30.898 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:53:30.898 INFO [stderr]     |
Dec 06 01:53:30.898 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 01:53:30.898 INFO [stderr] 
Dec 06 01:53:31.218 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.20s
Dec 06 01:53:31.224 INFO [stderr] su: No module specific data is present
Dec 06 01:53:31.606 INFO running `"docker" "inspect" "764394a63b6abee7b01b227440bd6d94044bb09793ad27a5c89af63722c21a58"`
Dec 06 01:53:31.666 INFO running `"docker" "rm" "-f" "764394a63b6abee7b01b227440bd6d94044bb09793ad27a5c89af63722c21a58"`
Dec 06 01:53:31.767 INFO [stdout] 764394a63b6abee7b01b227440bd6d94044bb09793ad27a5c89af63722c21a58
Dec 06 01:53:31.774 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-3/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-alt test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 06 01:53:32.035 INFO [stdout] 1586a97848562effd7355594195fb0b39c1359b56b0f76e9146c3c340acd869b
Dec 06 01:53:32.038 INFO running `"docker" "start" "-a" "1586a97848562effd7355594195fb0b39c1359b56b0f76e9146c3c340acd869b"`
Dec 06 01:53:32.594 INFO [stderr] usermod: no changes
Dec 06 01:53:32.644 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
Dec 06 01:53:32.646 INFO [stderr]      Running /target/debug/deps/blockchain-16635e491409b23c
Dec 06 01:53:32.649 INFO [stdout] 
Dec 06 01:53:32.649 INFO [stdout] running 0 tests
Dec 06 01:53:32.649 INFO [stdout] 
Dec 06 01:53:32.649 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 01:53:32.649 INFO [stdout] 
Dec 06 01:53:32.651 INFO [stderr] su: No module specific data is present
Dec 06 01:53:32.959 INFO running `"docker" "inspect" "1586a97848562effd7355594195fb0b39c1359b56b0f76e9146c3c340acd869b"`
Dec 06 01:53:33.048 INFO running `"docker" "rm" "-f" "1586a97848562effd7355594195fb0b39c1359b56b0f76e9146c3c340acd869b"`
Dec 06 01:53:33.180 INFO [stdout] 1586a97848562effd7355594195fb0b39c1359b56b0f76e9146c3c340acd869b