Dec 02 09:19:18.438 INFO testing AvishaiW/toy-blochain-rust against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 02 09:19:18.438 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-2/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/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 02 09:19:18.614 INFO [stdout] 7be5b7ba779088993b096fa846b6cc2ebaa9d091cfd0cae7758958c10150771a
Dec 02 09:19:18.616 INFO running `"docker" "start" "-a" "7be5b7ba779088993b096fa846b6cc2ebaa9d091cfd0cae7758958c10150771a"`
Dec 02 09:19:19.142 INFO [stderr] usermod: no changes
Dec 02 09:19:19.224 INFO [stderr]    Compiling block-buffer v0.7.0
Dec 02 09:19:19.499 INFO [stderr]    Compiling sha2 v0.8.0
Dec 02 09:19:20.771 INFO [stderr]    Compiling blockchain v0.1.0 (/source)
Dec 02 09:19:22.155 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:22.155 INFO [stderr]   --> src/main.rs:16:5
Dec 02 09:19:22.155 INFO [stderr]    |
Dec 02 09:19:22.156 INFO [stderr] 16 |     io::stdout().flush();
Dec 02 09:19:22.156 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:22.156 INFO [stderr]    |
Dec 02 09:19:22.156 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 02 09:19:22.156 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:22.156 INFO [stderr] 
Dec 02 09:19:22.156 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:22.156 INFO [stderr]   --> src/main.rs:17:5
Dec 02 09:19:22.156 INFO [stderr]    |
Dec 02 09:19:22.156 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_addr);
Dec 02 09:19:22.156 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:22.156 INFO [stderr]    |
Dec 02 09:19:22.156 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:22.157 INFO [stderr] 
Dec 02 09:19:22.157 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:22.157 INFO [stderr]   --> src/main.rs:19:5
Dec 02 09:19:22.157 INFO [stderr]    |
Dec 02 09:19:22.157 INFO [stderr] 19 |     io::stdout().flush();
Dec 02 09:19:22.157 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:22.157 INFO [stderr]    |
Dec 02 09:19:22.157 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:22.157 INFO [stderr] 
Dec 02 09:19:22.158 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:22.158 INFO [stderr]   --> src/main.rs:20:5
Dec 02 09:19:22.158 INFO [stderr]    |
Dec 02 09:19:22.158 INFO [stderr] 20 |     io::stdin().read_line(&mut difficulty);
Dec 02 09:19:22.158 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:22.158 INFO [stderr]    |
Dec 02 09:19:22.158 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:22.158 INFO [stderr] 
Dec 02 09:19:22.158 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:22.158 INFO [stderr]   --> src/main.rs:33:9
Dec 02 09:19:22.158 INFO [stderr]    |
Dec 02 09:19:22.158 INFO [stderr] 33 |         io::stdout().flush();
Dec 02 09:19:22.158 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:22.158 INFO [stderr]    |
Dec 02 09:19:22.158 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:22.158 INFO [stderr] 
Dec 02 09:19:22.158 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:22.158 INFO [stderr]   --> src/main.rs:35:9
Dec 02 09:19:22.158 INFO [stderr]    |
Dec 02 09:19:22.158 INFO [stderr] 35 |         io::stdin().read_line(&mut choice);
Dec 02 09:19:22.158 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:22.158 INFO [stderr]    |
Dec 02 09:19:22.158 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:22.158 INFO [stderr] 
Dec 02 09:19:22.158 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:22.158 INFO [stderr]   --> src/main.rs:50:17
Dec 02 09:19:22.158 INFO [stderr]    |
Dec 02 09:19:22.158 INFO [stderr] 50 |                 io::stdout().flush();
Dec 02 09:19:22.158 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:22.158 INFO [stderr]    |
Dec 02 09:19:22.158 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:22.158 INFO [stderr] 
Dec 02 09:19:22.158 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:22.158 INFO [stderr]   --> src/main.rs:51:17
Dec 02 09:19:22.158 INFO [stderr]    |
Dec 02 09:19:22.158 INFO [stderr] 51 |                 io::stdin().read_line(&mut sender);
Dec 02 09:19:22.158 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:22.158 INFO [stderr]    |
Dec 02 09:19:22.158 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:22.158 INFO [stderr] 
Dec 02 09:19:22.158 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:22.158 INFO [stderr]   --> src/main.rs:53:17
Dec 02 09:19:22.158 INFO [stderr]    |
Dec 02 09:19:22.158 INFO [stderr] 53 |                 io::stdout().flush();
Dec 02 09:19:22.158 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:22.158 INFO [stderr]    |
Dec 02 09:19:22.163 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:22.163 INFO [stderr] 
Dec 02 09:19:22.163 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:22.163 INFO [stderr]   --> src/main.rs:54:17
Dec 02 09:19:22.163 INFO [stderr]    |
Dec 02 09:19:22.163 INFO [stderr] 54 |                 io::stdin().read_line(&mut receiver);
Dec 02 09:19:22.163 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:22.163 INFO [stderr]    |
Dec 02 09:19:22.163 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:22.163 INFO [stderr] 
Dec 02 09:19:22.163 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:22.163 INFO [stderr]   --> src/main.rs:56:17
Dec 02 09:19:22.163 INFO [stderr]    |
Dec 02 09:19:22.163 INFO [stderr] 56 |                 io::stdout().flush();
Dec 02 09:19:22.163 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:22.163 INFO [stderr]    |
Dec 02 09:19:22.163 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:22.163 INFO [stderr] 
Dec 02 09:19:22.163 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:22.163 INFO [stderr]   --> src/main.rs:57:17
Dec 02 09:19:22.163 INFO [stderr]    |
Dec 02 09:19:22.163 INFO [stderr] 57 |                 io::stdin().read_line(&mut amount);
Dec 02 09:19:22.163 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:22.163 INFO [stderr]    |
Dec 02 09:19:22.163 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:22.163 INFO [stderr] 
Dec 02 09:19:22.163 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:22.163 INFO [stderr]   --> src/main.rs:81:21
Dec 02 09:19:22.163 INFO [stderr]    |
Dec 02 09:19:22.163 INFO [stderr] 81 |                     io::stdout().flush();
Dec 02 09:19:22.163 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:22.163 INFO [stderr]    |
Dec 02 09:19:22.163 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:22.163 INFO [stderr] 
Dec 02 09:19:22.163 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:22.163 INFO [stderr]   --> src/main.rs:82:21
Dec 02 09:19:22.163 INFO [stderr]    |
Dec 02 09:19:22.163 INFO [stderr] 82 |                     io::stdin().read_line(&mut new_diff);
Dec 02 09:19:22.163 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:22.163 INFO [stderr]    |
Dec 02 09:19:22.163 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:22.163 INFO [stderr] 
Dec 02 09:19:22.163 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:22.163 INFO [stderr]   --> src/main.rs:92:17
Dec 02 09:19:22.163 INFO [stderr]    |
Dec 02 09:19:22.163 INFO [stderr] 92 |                 io::stdout().flush();
Dec 02 09:19:22.163 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:22.163 INFO [stderr]    |
Dec 02 09:19:22.163 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:22.163 INFO [stderr] 
Dec 02 09:19:22.163 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:22.163 INFO [stderr]   --> src/main.rs:93:17
Dec 02 09:19:22.164 INFO [stderr]    |
Dec 02 09:19:22.164 INFO [stderr] 93 |                 io::stdin().read_line(&mut new_reward);
Dec 02 09:19:22.164 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:22.164 INFO [stderr]    |
Dec 02 09:19:22.164 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:22.164 INFO [stderr] 
Dec 02 09:19:23.504 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.35s
Dec 02 09:19:23.516 INFO [stderr] su: No module specific data is present
Dec 02 09:19:24.051 INFO running `"docker" "inspect" "7be5b7ba779088993b096fa846b6cc2ebaa9d091cfd0cae7758958c10150771a"`
Dec 02 09:19:24.310 INFO running `"docker" "rm" "-f" "7be5b7ba779088993b096fa846b6cc2ebaa9d091cfd0cae7758958c10150771a"`
Dec 02 09:19:24.408 INFO [stdout] 7be5b7ba779088993b096fa846b6cc2ebaa9d091cfd0cae7758958c10150771a
Dec 02 09:19:24.411 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-2/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/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 02 09:19:24.725 INFO [stdout] f997dcdd9896929777a460459d3249dd285bced89c54c69a3df5451eef8b3e56
Dec 02 09:19:24.727 INFO running `"docker" "start" "-a" "f997dcdd9896929777a460459d3249dd285bced89c54c69a3df5451eef8b3e56"`
Dec 02 09:19:25.424 INFO [stderr] usermod: no changes
Dec 02 09:19:25.494 INFO [stderr]    Compiling blockchain v0.1.0 (/source)
Dec 02 09:19:26.627 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:26.627 INFO [stderr]   --> src/main.rs:16:5
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr] 16 |     io::stdout().flush();
Dec 02 09:19:26.627 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 02 09:19:26.627 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:26.627 INFO [stderr] 
Dec 02 09:19:26.627 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:26.627 INFO [stderr]   --> src/main.rs:17:5
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_addr);
Dec 02 09:19:26.627 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:26.627 INFO [stderr] 
Dec 02 09:19:26.627 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:26.627 INFO [stderr]   --> src/main.rs:19:5
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr] 19 |     io::stdout().flush();
Dec 02 09:19:26.627 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:26.627 INFO [stderr] 
Dec 02 09:19:26.627 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:26.627 INFO [stderr]   --> src/main.rs:20:5
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr] 20 |     io::stdin().read_line(&mut difficulty);
Dec 02 09:19:26.627 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:26.627 INFO [stderr] 
Dec 02 09:19:26.627 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:26.627 INFO [stderr]   --> src/main.rs:33:9
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr] 33 |         io::stdout().flush();
Dec 02 09:19:26.627 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:26.627 INFO [stderr] 
Dec 02 09:19:26.627 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:26.627 INFO [stderr]   --> src/main.rs:35:9
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr] 35 |         io::stdin().read_line(&mut choice);
Dec 02 09:19:26.627 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:26.627 INFO [stderr] 
Dec 02 09:19:26.627 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:26.627 INFO [stderr]   --> src/main.rs:50:17
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr] 50 |                 io::stdout().flush();
Dec 02 09:19:26.627 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:26.627 INFO [stderr] 
Dec 02 09:19:26.627 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:26.627 INFO [stderr]   --> src/main.rs:51:17
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr] 51 |                 io::stdin().read_line(&mut sender);
Dec 02 09:19:26.627 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:26.627 INFO [stderr] 
Dec 02 09:19:26.627 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:26.627 INFO [stderr]   --> src/main.rs:53:17
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr] 53 |                 io::stdout().flush();
Dec 02 09:19:26.627 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:26.627 INFO [stderr] 
Dec 02 09:19:26.627 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:26.627 INFO [stderr]   --> src/main.rs:54:17
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr] 54 |                 io::stdin().read_line(&mut receiver);
Dec 02 09:19:26.627 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:26.627 INFO [stderr] 
Dec 02 09:19:26.627 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:26.627 INFO [stderr]   --> src/main.rs:56:17
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr] 56 |                 io::stdout().flush();
Dec 02 09:19:26.627 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:26.627 INFO [stderr] 
Dec 02 09:19:26.627 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:26.627 INFO [stderr]   --> src/main.rs:57:17
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr] 57 |                 io::stdin().read_line(&mut amount);
Dec 02 09:19:26.627 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:26.627 INFO [stderr] 
Dec 02 09:19:26.627 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:26.627 INFO [stderr]   --> src/main.rs:81:21
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr] 81 |                     io::stdout().flush();
Dec 02 09:19:26.627 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:26.627 INFO [stderr] 
Dec 02 09:19:26.627 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:26.627 INFO [stderr]   --> src/main.rs:82:21
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr] 82 |                     io::stdin().read_line(&mut new_diff);
Dec 02 09:19:26.627 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:26.627 INFO [stderr] 
Dec 02 09:19:26.627 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:26.627 INFO [stderr]   --> src/main.rs:92:17
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr] 92 |                 io::stdout().flush();
Dec 02 09:19:26.627 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:26.627 INFO [stderr]    |
Dec 02 09:19:26.627 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:26.628 INFO [stderr] 
Dec 02 09:19:26.628 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 09:19:26.628 INFO [stderr]   --> src/main.rs:93:17
Dec 02 09:19:26.628 INFO [stderr]    |
Dec 02 09:19:26.628 INFO [stderr] 93 |                 io::stdin().read_line(&mut new_reward);
Dec 02 09:19:26.628 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:19:26.628 INFO [stderr]    |
Dec 02 09:19:26.628 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 09:19:26.628 INFO [stderr] 
Dec 02 09:19:27.030 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.58s
Dec 02 09:19:27.034 INFO [stderr] su: No module specific data is present
Dec 02 09:19:27.331 INFO running `"docker" "inspect" "f997dcdd9896929777a460459d3249dd285bced89c54c69a3df5451eef8b3e56"`
Dec 02 09:19:27.444 INFO running `"docker" "rm" "-f" "f997dcdd9896929777a460459d3249dd285bced89c54c69a3df5451eef8b3e56"`
Dec 02 09:19:27.567 INFO [stdout] f997dcdd9896929777a460459d3249dd285bced89c54c69a3df5451eef8b3e56
Dec 02 09:19:27.575 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-2/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/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 02 09:19:27.846 INFO [stdout] 5b555f0022e5322e27f5140026b2f1ddd1268601d3935c1a5349afb736e5f9ff
Dec 02 09:19:27.848 INFO running `"docker" "start" "-a" "5b555f0022e5322e27f5140026b2f1ddd1268601d3935c1a5349afb736e5f9ff"`
Dec 02 09:19:28.358 INFO [stderr] usermod: no changes
Dec 02 09:19:28.439 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
Dec 02 09:19:28.439 INFO [stderr]      Running /target/debug/deps/blockchain-bdec32736124bb13
Dec 02 09:19:28.444 INFO [stdout] 
Dec 02 09:19:28.444 INFO [stdout] running 0 tests
Dec 02 09:19:28.444 INFO [stdout] 
Dec 02 09:19:28.444 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 02 09:19:28.444 INFO [stdout] 
Dec 02 09:19:28.447 INFO [stderr] su: No module specific data is present
Dec 02 09:19:28.761 INFO running `"docker" "inspect" "5b555f0022e5322e27f5140026b2f1ddd1268601d3935c1a5349afb736e5f9ff"`
Dec 02 09:19:28.890 INFO running `"docker" "rm" "-f" "5b555f0022e5322e27f5140026b2f1ddd1268601d3935c1a5349afb736e5f9ff"`
Dec 02 09:19:29.076 INFO [stdout] 5b555f0022e5322e27f5140026b2f1ddd1268601d3935c1a5349afb736e5f9ff
