Dec 01 21:36:53.755 INFO testing christiansakai/toy_blockchain_rust against 1.30.1 for beta-1.31-5
Dec 01 21:36:53.755 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-2/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/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 21:36:53.919 INFO [stdout] cb898ecf32f88f4b64071cb8bea9e3de292f3039297db0404e4f56a2f7daf22c
Dec 01 21:36:53.931 INFO running `"docker" "start" "-a" "cb898ecf32f88f4b64071cb8bea9e3de292f3039297db0404e4f56a2f7daf22c"`
Dec 01 21:36:55.372 INFO [stderr] usermod: no changes
Dec 01 21:36:55.546 INFO [stderr]    Compiling toy_blockchain v0.1.0 (/source)
Dec 01 21:36:56.995 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:36:56.995 INFO [stderr]   --> src/main.rs:16:5
Dec 01 21:36:56.995 INFO [stderr]    |
Dec 01 21:36:56.995 INFO [stderr] 16 |     io::stdout().flush();
Dec 01 21:36:56.995 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:36:56.995 INFO [stderr]    |
Dec 01 21:36:56.995 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 01 21:36:56.995 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:36:56.995 INFO [stderr] 
Dec 01 21:36:56.995 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:36:56.995 INFO [stderr]   --> src/main.rs:17:5
Dec 01 21:36:56.995 INFO [stderr]    |
Dec 01 21:36:56.995 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_address);
Dec 01 21:36:56.995 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:36:56.995 INFO [stderr]    |
Dec 01 21:36:56.995 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:36:56.995 INFO [stderr] 
Dec 01 21:36:56.995 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:36:56.995 INFO [stderr]   --> src/main.rs:19:5
Dec 01 21:36:56.995 INFO [stderr]    |
Dec 01 21:36:56.995 INFO [stderr] 19 |     io::stdout().flush();
Dec 01 21:36:56.995 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:36:56.995 INFO [stderr]    |
Dec 01 21:36:56.995 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:36:56.995 INFO [stderr] 
Dec 01 21:36:56.995 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:36:56.995 INFO [stderr]   --> src/main.rs:20:5
Dec 01 21:36:56.995 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr] 20 |     io::stdin().read_line(&mut difficulty);
Dec 01 21:36:56.996 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:36:56.996 INFO [stderr] 
Dec 01 21:36:56.996 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:36:56.996 INFO [stderr]   --> src/main.rs:38:9
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr] 38 |         io::stdout().flush();
Dec 01 21:36:56.996 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:36:56.996 INFO [stderr] 
Dec 01 21:36:56.996 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:36:56.996 INFO [stderr]   --> src/main.rs:41:9
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr] 41 |         io::stdin().read_line(&mut choice);
Dec 01 21:36:56.996 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:36:56.996 INFO [stderr] 
Dec 01 21:36:56.996 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:36:56.996 INFO [stderr]   --> src/main.rs:57:17
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr] 57 |                 io::stdout().flush();
Dec 01 21:36:56.996 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:36:56.996 INFO [stderr] 
Dec 01 21:36:56.996 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:36:56.996 INFO [stderr]   --> src/main.rs:58:17
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr] 58 |                 io::stdin().read_line(&mut sender);
Dec 01 21:36:56.996 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:36:56.996 INFO [stderr] 
Dec 01 21:36:56.996 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:36:56.996 INFO [stderr]   --> src/main.rs:60:17
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr] 60 |                 io::stdout().flush();
Dec 01 21:36:56.996 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:36:56.996 INFO [stderr] 
Dec 01 21:36:56.996 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:36:56.996 INFO [stderr]   --> src/main.rs:61:17
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr] 61 |                 io::stdin().read_line(&mut receiver);
Dec 01 21:36:56.996 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:36:56.996 INFO [stderr] 
Dec 01 21:36:56.996 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:36:56.996 INFO [stderr]   --> src/main.rs:63:17
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr] 63 |                 io::stdout().flush();
Dec 01 21:36:56.996 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:36:56.996 INFO [stderr] 
Dec 01 21:36:56.996 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:36:56.996 INFO [stderr]   --> src/main.rs:64:17
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr] 64 |                 io::stdin().read_line(&mut amount);
Dec 01 21:36:56.996 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:36:56.996 INFO [stderr] 
Dec 01 21:36:56.996 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:36:56.996 INFO [stderr]   --> src/main.rs:90:17
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr] 90 |                 io::stdout().flush();
Dec 01 21:36:56.996 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:36:56.996 INFO [stderr] 
Dec 01 21:36:56.996 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:36:56.996 INFO [stderr]   --> src/main.rs:91:17
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr] 91 |                 io::stdin().read_line(&mut new_difficulty);
Dec 01 21:36:56.996 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:36:56.996 INFO [stderr]    |
Dec 01 21:36:56.996 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:36:56.996 INFO [stderr] 
Dec 01 21:36:56.996 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:36:56.996 INFO [stderr]    --> src/main.rs:105:17
Dec 01 21:36:56.997 INFO [stderr]     |
Dec 01 21:36:56.997 INFO [stderr] 105 |                 io::stdout().flush();
Dec 01 21:36:56.997 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:36:56.997 INFO [stderr]     |
Dec 01 21:36:56.997 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:36:56.997 INFO [stderr] 
Dec 01 21:36:56.997 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:36:56.997 INFO [stderr]    --> src/main.rs:106:17
Dec 01 21:36:56.997 INFO [stderr]     |
Dec 01 21:36:56.997 INFO [stderr] 106 |                 io::stdin().read_line(&mut new_reward);
Dec 01 21:36:56.997 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:36:56.997 INFO [stderr]     |
Dec 01 21:36:56.997 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:36:56.997 INFO [stderr] 
Dec 01 21:36:58.207 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.79s
Dec 01 21:36:58.207 INFO [stderr] su: No module specific data is present
Dec 01 21:36:58.856 INFO running `"docker" "inspect" "cb898ecf32f88f4b64071cb8bea9e3de292f3039297db0404e4f56a2f7daf22c"`
Dec 01 21:36:59.103 INFO running `"docker" "rm" "-f" "cb898ecf32f88f4b64071cb8bea9e3de292f3039297db0404e4f56a2f7daf22c"`
Dec 01 21:36:59.358 INFO [stdout] cb898ecf32f88f4b64071cb8bea9e3de292f3039297db0404e4f56a2f7daf22c
Dec 01 21:36:59.365 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-2/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/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 21:36:59.866 INFO [stdout] ffed1fa3b132fd46d473c1e1faa0b8dfeba0ee0c6eb206aec62b38c31be13be5
Dec 01 21:36:59.871 INFO running `"docker" "start" "-a" "ffed1fa3b132fd46d473c1e1faa0b8dfeba0ee0c6eb206aec62b38c31be13be5"`
Dec 01 21:37:01.155 INFO [stderr] usermod: no changes
Dec 01 21:37:01.267 INFO [stderr]    Compiling toy_blockchain v0.1.0 (/source)
Dec 01 21:37:02.571 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:37:02.571 INFO [stderr]   --> src/main.rs:16:5
Dec 01 21:37:02.571 INFO [stderr]    |
Dec 01 21:37:02.571 INFO [stderr] 16 |     io::stdout().flush();
Dec 01 21:37:02.571 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:37:02.571 INFO [stderr]    |
Dec 01 21:37:02.571 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 01 21:37:02.571 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:37:02.571 INFO [stderr] 
Dec 01 21:37:02.571 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:37:02.571 INFO [stderr]   --> src/main.rs:17:5
Dec 01 21:37:02.571 INFO [stderr]    |
Dec 01 21:37:02.571 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_address);
Dec 01 21:37:02.571 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:37:02.571 INFO [stderr]    |
Dec 01 21:37:02.571 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:37:02.571 INFO [stderr] 
Dec 01 21:37:02.571 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:37:02.571 INFO [stderr]   --> src/main.rs:19:5
Dec 01 21:37:02.571 INFO [stderr]    |
Dec 01 21:37:02.571 INFO [stderr] 19 |     io::stdout().flush();
Dec 01 21:37:02.571 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:37:02.571 INFO [stderr]    |
Dec 01 21:37:02.571 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:37:02.572 INFO [stderr] 
Dec 01 21:37:02.572 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:37:02.572 INFO [stderr]   --> src/main.rs:20:5
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr] 20 |     io::stdin().read_line(&mut difficulty);
Dec 01 21:37:02.572 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:37:02.572 INFO [stderr] 
Dec 01 21:37:02.572 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:37:02.572 INFO [stderr]   --> src/main.rs:38:9
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr] 38 |         io::stdout().flush();
Dec 01 21:37:02.572 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:37:02.572 INFO [stderr] 
Dec 01 21:37:02.572 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:37:02.572 INFO [stderr]   --> src/main.rs:41:9
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr] 41 |         io::stdin().read_line(&mut choice);
Dec 01 21:37:02.572 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:37:02.572 INFO [stderr] 
Dec 01 21:37:02.572 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:37:02.572 INFO [stderr]   --> src/main.rs:57:17
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr] 57 |                 io::stdout().flush();
Dec 01 21:37:02.572 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:37:02.572 INFO [stderr] 
Dec 01 21:37:02.572 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:37:02.572 INFO [stderr]   --> src/main.rs:58:17
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr] 58 |                 io::stdin().read_line(&mut sender);
Dec 01 21:37:02.572 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:37:02.572 INFO [stderr] 
Dec 01 21:37:02.572 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:37:02.572 INFO [stderr]   --> src/main.rs:60:17
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr] 60 |                 io::stdout().flush();
Dec 01 21:37:02.572 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:37:02.572 INFO [stderr] 
Dec 01 21:37:02.572 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:37:02.572 INFO [stderr]   --> src/main.rs:61:17
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr] 61 |                 io::stdin().read_line(&mut receiver);
Dec 01 21:37:02.572 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:37:02.572 INFO [stderr] 
Dec 01 21:37:02.572 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:37:02.572 INFO [stderr]   --> src/main.rs:63:17
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr] 63 |                 io::stdout().flush();
Dec 01 21:37:02.572 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:37:02.572 INFO [stderr] 
Dec 01 21:37:02.572 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:37:02.572 INFO [stderr]   --> src/main.rs:64:17
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr] 64 |                 io::stdin().read_line(&mut amount);
Dec 01 21:37:02.572 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:37:02.572 INFO [stderr] 
Dec 01 21:37:02.572 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:37:02.572 INFO [stderr]   --> src/main.rs:90:17
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr] 90 |                 io::stdout().flush();
Dec 01 21:37:02.572 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:37:02.572 INFO [stderr]    |
Dec 01 21:37:02.572 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:37:02.572 INFO [stderr] 
Dec 01 21:37:02.572 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:37:02.572 INFO [stderr]   --> src/main.rs:91:17
Dec 01 21:37:02.573 INFO [stderr]    |
Dec 01 21:37:02.573 INFO [stderr] 91 |                 io::stdin().read_line(&mut new_difficulty);
Dec 01 21:37:02.573 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:37:02.573 INFO [stderr]    |
Dec 01 21:37:02.573 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:37:02.573 INFO [stderr] 
Dec 01 21:37:02.573 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:37:02.573 INFO [stderr]    --> src/main.rs:105:17
Dec 01 21:37:02.573 INFO [stderr]     |
Dec 01 21:37:02.573 INFO [stderr] 105 |                 io::stdout().flush();
Dec 01 21:37:02.573 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:37:02.573 INFO [stderr]     |
Dec 01 21:37:02.573 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:37:02.573 INFO [stderr] 
Dec 01 21:37:02.573 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 01 21:37:02.573 INFO [stderr]    --> src/main.rs:106:17
Dec 01 21:37:02.573 INFO [stderr]     |
Dec 01 21:37:02.573 INFO [stderr] 106 |                 io::stdin().read_line(&mut new_reward);
Dec 01 21:37:02.573 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 21:37:02.573 INFO [stderr]     |
Dec 01 21:37:02.573 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 21:37:02.573 INFO [stderr] 
Dec 01 21:37:03.143 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.95s
Dec 01 21:37:03.144 INFO [stderr] su: No module specific data is present
Dec 01 21:37:03.897 INFO running `"docker" "inspect" "ffed1fa3b132fd46d473c1e1faa0b8dfeba0ee0c6eb206aec62b38c31be13be5"`
Dec 01 21:37:04.228 INFO running `"docker" "rm" "-f" "ffed1fa3b132fd46d473c1e1faa0b8dfeba0ee0c6eb206aec62b38c31be13be5"`
Dec 01 21:37:04.551 INFO [stdout] ffed1fa3b132fd46d473c1e1faa0b8dfeba0ee0c6eb206aec62b38c31be13be5
Dec 01 21:37:04.556 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-2/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/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 21:37:05.027 INFO [stdout] 1bfd2099a66f21128e9880716afd3e0bb62de6383167ce99e6489c83d7e65815
Dec 01 21:37:05.027 INFO running `"docker" "start" "-a" "1bfd2099a66f21128e9880716afd3e0bb62de6383167ce99e6489c83d7e65815"`
Dec 01 21:37:06.219 INFO [stderr] usermod: no changes
Dec 01 21:37:06.323 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
Dec 01 21:37:06.327 INFO [stderr]      Running /target/debug/deps/toy_blockchain-f9d475ab06983080
Dec 01 21:37:06.334 INFO [stdout] 
Dec 01 21:37:06.334 INFO [stdout] running 0 tests
Dec 01 21:37:06.334 INFO [stdout] 
Dec 01 21:37:06.334 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 01 21:37:06.334 INFO [stdout] 
Dec 01 21:37:06.335 INFO [stderr] su: No module specific data is present
Dec 01 21:37:06.961 INFO running `"docker" "inspect" "1bfd2099a66f21128e9880716afd3e0bb62de6383167ce99e6489c83d7e65815"`
Dec 01 21:37:07.199 INFO running `"docker" "rm" "-f" "1bfd2099a66f21128e9880716afd3e0bb62de6383167ce99e6489c83d7e65815"`
Dec 01 21:37:07.450 INFO [stdout] 1bfd2099a66f21128e9880716afd3e0bb62de6383167ce99e6489c83d7e65815
