Dec 13 17:08:09.981 INFO testing iThinkyouknow/rust-blockchain against try#aa49d8ef14939ddec0e34b346b60174a5673d48f for pr-56550
Dec 13 17:08:09.981 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-7/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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 13 17:08:10.638 INFO [stdout] 8f9a78443be99416c5864cafdc81d8dbc93762f46303fa8e0386d75883b85648
Dec 13 17:08:10.640 INFO running `"docker" "start" "-a" "8f9a78443be99416c5864cafdc81d8dbc93762f46303fa8e0386d75883b85648"`
Dec 13 17:08:12.499 INFO [stderr] usermod: no changes
Dec 13 17:08:12.635 INFO [stderr]    Compiling blockchain v0.1.0 (/source)
Dec 13 17:08:13.759 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:13.759 INFO [stderr]   --> src/main.rs:17:5
Dec 13 17:08:13.759 INFO [stderr]    |
Dec 13 17:08:13.759 INFO [stderr] 17 |     io::stdout().flush();
Dec 13 17:08:13.759 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:13.759 INFO [stderr]    |
Dec 13 17:08:13.759 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 13 17:08:13.759 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:13.759 INFO [stderr] 
Dec 13 17:08:13.759 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:13.759 INFO [stderr]   --> src/main.rs:18:5
Dec 13 17:08:13.759 INFO [stderr]    |
Dec 13 17:08:13.759 INFO [stderr] 18 |     io::stdin().read_line(&mut miner_addr);
Dec 13 17:08:13.759 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:13.759 INFO [stderr]    |
Dec 13 17:08:13.759 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:13.759 INFO [stderr] 
Dec 13 17:08:13.759 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:13.759 INFO [stderr]   --> src/main.rs:21:5
Dec 13 17:08:13.759 INFO [stderr]    |
Dec 13 17:08:13.759 INFO [stderr] 21 |     io::stdout().flush();
Dec 13 17:08:13.759 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:13.759 INFO [stderr]    |
Dec 13 17:08:13.759 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:13.759 INFO [stderr] 
Dec 13 17:08:13.759 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:13.759 INFO [stderr]   --> src/main.rs:22:5
Dec 13 17:08:13.759 INFO [stderr]    |
Dec 13 17:08:13.759 INFO [stderr] 22 |     io::stdin().read_line(&mut difficulty);
Dec 13 17:08:13.759 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:13.760 INFO [stderr]    |
Dec 13 17:08:13.760 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:13.760 INFO [stderr] 
Dec 13 17:08:13.760 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:13.760 INFO [stderr]   --> src/main.rs:39:9
Dec 13 17:08:13.760 INFO [stderr]    |
Dec 13 17:08:13.760 INFO [stderr] 39 |         io::stdout().flush();
Dec 13 17:08:13.760 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:13.760 INFO [stderr]    |
Dec 13 17:08:13.760 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:13.760 INFO [stderr] 
Dec 13 17:08:13.760 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:13.760 INFO [stderr]   --> src/main.rs:41:9
Dec 13 17:08:13.760 INFO [stderr]    |
Dec 13 17:08:13.760 INFO [stderr] 41 |         io::stdin().read_line(&mut choice);
Dec 13 17:08:13.760 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:13.760 INFO [stderr]    |
Dec 13 17:08:13.760 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:13.760 INFO [stderr] 
Dec 13 17:08:13.775 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:13.775 INFO [stderr]   --> src/main.rs:55:17
Dec 13 17:08:13.775 INFO [stderr]    |
Dec 13 17:08:13.775 INFO [stderr] 55 |                 io::stdout().flush();
Dec 13 17:08:13.775 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:13.775 INFO [stderr]    |
Dec 13 17:08:13.775 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:13.775 INFO [stderr] 
Dec 13 17:08:13.775 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:13.775 INFO [stderr]   --> src/main.rs:56:17
Dec 13 17:08:13.775 INFO [stderr]    |
Dec 13 17:08:13.775 INFO [stderr] 56 |                 io::stdin().read_line(&mut sender);
Dec 13 17:08:13.775 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:13.775 INFO [stderr]    |
Dec 13 17:08:13.775 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:13.775 INFO [stderr] 
Dec 13 17:08:13.775 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:13.776 INFO [stderr]   --> src/main.rs:58:17
Dec 13 17:08:13.776 INFO [stderr]    |
Dec 13 17:08:13.776 INFO [stderr] 58 |                 io::stdout().flush();
Dec 13 17:08:13.776 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:13.776 INFO [stderr]    |
Dec 13 17:08:13.776 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:13.776 INFO [stderr] 
Dec 13 17:08:13.776 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:13.776 INFO [stderr]   --> src/main.rs:59:17
Dec 13 17:08:13.776 INFO [stderr]    |
Dec 13 17:08:13.776 INFO [stderr] 59 |                 io::stdin().read_line(&mut receiver);
Dec 13 17:08:13.776 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:13.776 INFO [stderr]    |
Dec 13 17:08:13.776 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:13.776 INFO [stderr] 
Dec 13 17:08:13.776 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:13.776 INFO [stderr]   --> src/main.rs:62:17
Dec 13 17:08:13.776 INFO [stderr]    |
Dec 13 17:08:13.776 INFO [stderr] 62 |                 io::stdout().flush();
Dec 13 17:08:13.776 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:13.776 INFO [stderr]    |
Dec 13 17:08:13.776 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:13.776 INFO [stderr] 
Dec 13 17:08:13.776 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:13.776 INFO [stderr]   --> src/main.rs:63:17
Dec 13 17:08:13.776 INFO [stderr]    |
Dec 13 17:08:13.776 INFO [stderr] 63 |                 io::stdin().read_line(&mut amount);
Dec 13 17:08:13.776 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:13.776 INFO [stderr]    |
Dec 13 17:08:13.776 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:13.776 INFO [stderr] 
Dec 13 17:08:13.776 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:13.776 INFO [stderr]   --> src/main.rs:87:17
Dec 13 17:08:13.776 INFO [stderr]    |
Dec 13 17:08:13.776 INFO [stderr] 87 |                 io::stdout().flush();
Dec 13 17:08:13.776 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:13.776 INFO [stderr]    |
Dec 13 17:08:13.776 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:13.776 INFO [stderr] 
Dec 13 17:08:13.776 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:13.776 INFO [stderr]   --> src/main.rs:88:17
Dec 13 17:08:13.776 INFO [stderr]    |
Dec 13 17:08:13.776 INFO [stderr] 88 |                 io::stdin().read_line(&mut new_diff);
Dec 13 17:08:13.776 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:13.776 INFO [stderr]    |
Dec 13 17:08:13.776 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:13.776 INFO [stderr] 
Dec 13 17:08:13.776 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:13.776 INFO [stderr]   --> src/main.rs:98:17
Dec 13 17:08:13.776 INFO [stderr]    |
Dec 13 17:08:13.776 INFO [stderr] 98 |                 io::stdout().flush();
Dec 13 17:08:13.776 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:13.776 INFO [stderr]    |
Dec 13 17:08:13.776 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:13.776 INFO [stderr] 
Dec 13 17:08:13.776 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:13.776 INFO [stderr]   --> src/main.rs:99:17
Dec 13 17:08:13.776 INFO [stderr]    |
Dec 13 17:08:13.776 INFO [stderr] 99 |                 io::stdin().read_line(&mut new_reward);
Dec 13 17:08:13.776 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:13.776 INFO [stderr]    |
Dec 13 17:08:13.776 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:13.776 INFO [stderr] 
Dec 13 17:08:15.113 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.59s
Dec 13 17:08:15.121 INFO [stderr] su: No module specific data is present
Dec 13 17:08:15.985 INFO running `"docker" "inspect" "8f9a78443be99416c5864cafdc81d8dbc93762f46303fa8e0386d75883b85648"`
Dec 13 17:08:16.237 INFO running `"docker" "rm" "-f" "8f9a78443be99416c5864cafdc81d8dbc93762f46303fa8e0386d75883b85648"`
Dec 13 17:08:16.549 INFO [stdout] 8f9a78443be99416c5864cafdc81d8dbc93762f46303fa8e0386d75883b85648
Dec 13 17:08:16.559 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-7/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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 13 17:08:17.043 INFO [stdout] 121aa10163ecfd97cdeb99b6f51dc301113c19105f2621935e085b3a8a83bdc0
Dec 13 17:08:17.047 INFO running `"docker" "start" "-a" "121aa10163ecfd97cdeb99b6f51dc301113c19105f2621935e085b3a8a83bdc0"`
Dec 13 17:08:18.199 INFO [stderr] usermod: no changes
Dec 13 17:08:18.307 INFO [stderr]    Compiling blockchain v0.1.0 (/source)
Dec 13 17:08:19.347 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:19.347 INFO [stderr]   --> src/main.rs:17:5
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr] 17 |     io::stdout().flush();
Dec 13 17:08:19.347 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 13 17:08:19.347 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:19.347 INFO [stderr] 
Dec 13 17:08:19.347 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:19.347 INFO [stderr]   --> src/main.rs:18:5
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr] 18 |     io::stdin().read_line(&mut miner_addr);
Dec 13 17:08:19.347 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:19.347 INFO [stderr] 
Dec 13 17:08:19.347 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:19.347 INFO [stderr]   --> src/main.rs:21:5
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr] 21 |     io::stdout().flush();
Dec 13 17:08:19.347 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:19.347 INFO [stderr] 
Dec 13 17:08:19.347 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:19.347 INFO [stderr]   --> src/main.rs:22:5
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr] 22 |     io::stdin().read_line(&mut difficulty);
Dec 13 17:08:19.347 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:19.347 INFO [stderr] 
Dec 13 17:08:19.347 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:19.347 INFO [stderr]   --> src/main.rs:39:9
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr] 39 |         io::stdout().flush();
Dec 13 17:08:19.347 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:19.347 INFO [stderr] 
Dec 13 17:08:19.347 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:19.347 INFO [stderr]   --> src/main.rs:41:9
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr] 41 |         io::stdin().read_line(&mut choice);
Dec 13 17:08:19.347 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:19.347 INFO [stderr] 
Dec 13 17:08:19.347 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:19.347 INFO [stderr]   --> src/main.rs:55:17
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr] 55 |                 io::stdout().flush();
Dec 13 17:08:19.347 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:19.347 INFO [stderr] 
Dec 13 17:08:19.347 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:19.347 INFO [stderr]   --> src/main.rs:56:17
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr] 56 |                 io::stdin().read_line(&mut sender);
Dec 13 17:08:19.347 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:19.347 INFO [stderr] 
Dec 13 17:08:19.347 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:19.347 INFO [stderr]   --> src/main.rs:58:17
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr] 58 |                 io::stdout().flush();
Dec 13 17:08:19.347 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:19.347 INFO [stderr] 
Dec 13 17:08:19.347 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:19.347 INFO [stderr]   --> src/main.rs:59:17
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr] 59 |                 io::stdin().read_line(&mut receiver);
Dec 13 17:08:19.347 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:19.347 INFO [stderr]    |
Dec 13 17:08:19.347 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:19.347 INFO [stderr] 
Dec 13 17:08:19.348 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:19.348 INFO [stderr]   --> src/main.rs:62:17
Dec 13 17:08:19.348 INFO [stderr]    |
Dec 13 17:08:19.348 INFO [stderr] 62 |                 io::stdout().flush();
Dec 13 17:08:19.348 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:19.348 INFO [stderr]    |
Dec 13 17:08:19.348 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:19.348 INFO [stderr] 
Dec 13 17:08:19.348 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:19.348 INFO [stderr]   --> src/main.rs:63:17
Dec 13 17:08:19.348 INFO [stderr]    |
Dec 13 17:08:19.348 INFO [stderr] 63 |                 io::stdin().read_line(&mut amount);
Dec 13 17:08:19.348 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:19.348 INFO [stderr]    |
Dec 13 17:08:19.348 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:19.348 INFO [stderr] 
Dec 13 17:08:19.348 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:19.348 INFO [stderr]   --> src/main.rs:87:17
Dec 13 17:08:19.348 INFO [stderr]    |
Dec 13 17:08:19.348 INFO [stderr] 87 |                 io::stdout().flush();
Dec 13 17:08:19.348 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:19.348 INFO [stderr]    |
Dec 13 17:08:19.348 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:19.348 INFO [stderr] 
Dec 13 17:08:19.348 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:19.348 INFO [stderr]   --> src/main.rs:88:17
Dec 13 17:08:19.348 INFO [stderr]    |
Dec 13 17:08:19.348 INFO [stderr] 88 |                 io::stdin().read_line(&mut new_diff);
Dec 13 17:08:19.348 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:19.348 INFO [stderr]    |
Dec 13 17:08:19.348 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:19.348 INFO [stderr] 
Dec 13 17:08:19.348 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:19.348 INFO [stderr]   --> src/main.rs:98:17
Dec 13 17:08:19.348 INFO [stderr]    |
Dec 13 17:08:19.348 INFO [stderr] 98 |                 io::stdout().flush();
Dec 13 17:08:19.348 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:19.348 INFO [stderr]    |
Dec 13 17:08:19.348 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:19.348 INFO [stderr] 
Dec 13 17:08:19.348 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 17:08:19.348 INFO [stderr]   --> src/main.rs:99:17
Dec 13 17:08:19.348 INFO [stderr]    |
Dec 13 17:08:19.348 INFO [stderr] 99 |                 io::stdin().read_line(&mut new_reward);
Dec 13 17:08:19.348 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:08:19.348 INFO [stderr]    |
Dec 13 17:08:19.348 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 17:08:19.348 INFO [stderr] 
Dec 13 17:08:19.719 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.49s
Dec 13 17:08:19.731 INFO [stderr] su: No module specific data is present
Dec 13 17:08:21.119 INFO running `"docker" "inspect" "121aa10163ecfd97cdeb99b6f51dc301113c19105f2621935e085b3a8a83bdc0"`
Dec 13 17:08:21.521 INFO running `"docker" "rm" "-f" "121aa10163ecfd97cdeb99b6f51dc301113c19105f2621935e085b3a8a83bdc0"`
Dec 13 17:08:21.813 INFO [stdout] 121aa10163ecfd97cdeb99b6f51dc301113c19105f2621935e085b3a8a83bdc0
Dec 13 17:08:21.817 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-7/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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 13 17:08:22.284 INFO [stdout] 5c8becbde3a4c764febad2f427d3e8558c3cb0fb994733438f716d01778645d7
Dec 13 17:08:22.289 INFO running `"docker" "start" "-a" "5c8becbde3a4c764febad2f427d3e8558c3cb0fb994733438f716d01778645d7"`
Dec 13 17:08:24.026 INFO [stderr] usermod: no changes
Dec 13 17:08:24.146 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.09s
Dec 13 17:08:24.149 INFO [stderr]      Running /target/debug/deps/blockchain-9ebddab80274f690
Dec 13 17:08:24.151 INFO [stdout] 
Dec 13 17:08:24.151 INFO [stdout] running 0 tests
Dec 13 17:08:24.151 INFO [stdout] 
Dec 13 17:08:24.151 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 13 17:08:24.151 INFO [stdout] 
Dec 13 17:08:24.159 INFO [stderr] su: No module specific data is present
Dec 13 17:08:25.590 INFO running `"docker" "inspect" "5c8becbde3a4c764febad2f427d3e8558c3cb0fb994733438f716d01778645d7"`
Dec 13 17:08:25.911 INFO running `"docker" "rm" "-f" "5c8becbde3a4c764febad2f427d3e8558c3cb0fb994733438f716d01778645d7"`
Dec 13 17:08:26.263 INFO [stdout] 5c8becbde3a4c764febad2f427d3e8558c3cb0fb994733438f716d01778645d7