Dec 06 15:37:04.417 INFO testing AvishaiW/toy-blochain-rust against try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468 for pr-56514
Dec 06 15:37:04.417 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-2/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-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 15:37:04.920 INFO [stdout] 2d490ad9c33a612739e5b6bd413b96fd6a3bf493809c97748d1d121eacb20815
Dec 06 15:37:04.922 INFO running `"docker" "start" "-a" "2d490ad9c33a612739e5b6bd413b96fd6a3bf493809c97748d1d121eacb20815"`
Dec 06 15:37:05.713 INFO [stderr] usermod: no changes
Dec 06 15:37:05.804 INFO [stderr]    Compiling sha2 v0.8.0
Dec 06 15:37:06.851 INFO [stderr]    Compiling blockchain v0.1.0 (/source)
Dec 06 15:37:08.151 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:08.151 INFO [stderr]   --> src/main.rs:16:5
Dec 06 15:37:08.151 INFO [stderr]    |
Dec 06 15:37:08.152 INFO [stderr] 16 |     io::stdout().flush();
Dec 06 15:37:08.152 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:08.152 INFO [stderr]    |
Dec 06 15:37:08.153 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 06 15:37:08.153 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:08.153 INFO [stderr] 
Dec 06 15:37:08.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:08.154 INFO [stderr]   --> src/main.rs:17:5
Dec 06 15:37:08.154 INFO [stderr]    |
Dec 06 15:37:08.154 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_addr);
Dec 06 15:37:08.154 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:08.155 INFO [stderr]    |
Dec 06 15:37:08.155 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:08.155 INFO [stderr] 
Dec 06 15:37:08.155 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:08.156 INFO [stderr]   --> src/main.rs:19:5
Dec 06 15:37:08.156 INFO [stderr]    |
Dec 06 15:37:08.156 INFO [stderr] 19 |     io::stdout().flush();
Dec 06 15:37:08.157 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:08.157 INFO [stderr]    |
Dec 06 15:37:08.157 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:08.157 INFO [stderr] 
Dec 06 15:37:08.158 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:08.158 INFO [stderr]   --> src/main.rs:20:5
Dec 06 15:37:08.158 INFO [stderr]    |
Dec 06 15:37:08.158 INFO [stderr] 20 |     io::stdin().read_line(&mut difficulty);
Dec 06 15:37:08.159 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:08.159 INFO [stderr]    |
Dec 06 15:37:08.159 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:08.159 INFO [stderr] 
Dec 06 15:37:08.159 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:08.159 INFO [stderr]   --> src/main.rs:33:9
Dec 06 15:37:08.159 INFO [stderr]    |
Dec 06 15:37:08.160 INFO [stderr] 33 |         io::stdout().flush();
Dec 06 15:37:08.160 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:08.160 INFO [stderr]    |
Dec 06 15:37:08.160 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:08.160 INFO [stderr] 
Dec 06 15:37:08.160 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:08.160 INFO [stderr]   --> src/main.rs:35:9
Dec 06 15:37:08.160 INFO [stderr]    |
Dec 06 15:37:08.160 INFO [stderr] 35 |         io::stdin().read_line(&mut choice);
Dec 06 15:37:08.160 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:08.160 INFO [stderr]    |
Dec 06 15:37:08.160 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:08.160 INFO [stderr] 
Dec 06 15:37:08.160 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:08.160 INFO [stderr]   --> src/main.rs:50:17
Dec 06 15:37:08.160 INFO [stderr]    |
Dec 06 15:37:08.160 INFO [stderr] 50 |                 io::stdout().flush();
Dec 06 15:37:08.160 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:08.160 INFO [stderr]    |
Dec 06 15:37:08.160 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:08.160 INFO [stderr] 
Dec 06 15:37:08.160 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:08.161 INFO [stderr]   --> src/main.rs:51:17
Dec 06 15:37:08.161 INFO [stderr]    |
Dec 06 15:37:08.161 INFO [stderr] 51 |                 io::stdin().read_line(&mut sender);
Dec 06 15:37:08.161 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:08.161 INFO [stderr]    |
Dec 06 15:37:08.161 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:08.161 INFO [stderr] 
Dec 06 15:37:08.161 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:08.161 INFO [stderr]   --> src/main.rs:53:17
Dec 06 15:37:08.161 INFO [stderr]    |
Dec 06 15:37:08.161 INFO [stderr] 53 |                 io::stdout().flush();
Dec 06 15:37:08.161 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:08.161 INFO [stderr]    |
Dec 06 15:37:08.161 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:08.162 INFO [stderr] 
Dec 06 15:37:08.162 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:08.162 INFO [stderr]   --> src/main.rs:54:17
Dec 06 15:37:08.162 INFO [stderr]    |
Dec 06 15:37:08.162 INFO [stderr] 54 |                 io::stdin().read_line(&mut receiver);
Dec 06 15:37:08.162 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:08.162 INFO [stderr]    |
Dec 06 15:37:08.162 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:08.162 INFO [stderr] 
Dec 06 15:37:08.162 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:08.162 INFO [stderr]   --> src/main.rs:56:17
Dec 06 15:37:08.162 INFO [stderr]    |
Dec 06 15:37:08.163 INFO [stderr] 56 |                 io::stdout().flush();
Dec 06 15:37:08.163 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:08.163 INFO [stderr]    |
Dec 06 15:37:08.163 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:08.163 INFO [stderr] 
Dec 06 15:37:08.163 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:08.163 INFO [stderr]   --> src/main.rs:57:17
Dec 06 15:37:08.163 INFO [stderr]    |
Dec 06 15:37:08.163 INFO [stderr] 57 |                 io::stdin().read_line(&mut amount);
Dec 06 15:37:08.163 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:08.163 INFO [stderr]    |
Dec 06 15:37:08.163 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:08.164 INFO [stderr] 
Dec 06 15:37:08.164 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:08.164 INFO [stderr]   --> src/main.rs:81:21
Dec 06 15:37:08.164 INFO [stderr]    |
Dec 06 15:37:08.164 INFO [stderr] 81 |                     io::stdout().flush();
Dec 06 15:37:08.164 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:08.164 INFO [stderr]    |
Dec 06 15:37:08.164 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:08.164 INFO [stderr] 
Dec 06 15:37:08.164 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:08.164 INFO [stderr]   --> src/main.rs:82:21
Dec 06 15:37:08.164 INFO [stderr]    |
Dec 06 15:37:08.164 INFO [stderr] 82 |                     io::stdin().read_line(&mut new_diff);
Dec 06 15:37:08.165 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:08.165 INFO [stderr]    |
Dec 06 15:37:08.165 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:08.165 INFO [stderr] 
Dec 06 15:37:08.165 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:08.165 INFO [stderr]   --> src/main.rs:92:17
Dec 06 15:37:08.165 INFO [stderr]    |
Dec 06 15:37:08.165 INFO [stderr] 92 |                 io::stdout().flush();
Dec 06 15:37:08.165 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:08.165 INFO [stderr]    |
Dec 06 15:37:08.165 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:08.165 INFO [stderr] 
Dec 06 15:37:08.165 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:08.165 INFO [stderr]   --> src/main.rs:93:17
Dec 06 15:37:08.166 INFO [stderr]    |
Dec 06 15:37:08.166 INFO [stderr] 93 |                 io::stdin().read_line(&mut new_reward);
Dec 06 15:37:08.166 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:08.166 INFO [stderr]    |
Dec 06 15:37:08.166 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:08.166 INFO [stderr] 
Dec 06 15:37:08.880 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.15s
Dec 06 15:37:08.888 INFO [stderr] su: No module specific data is present
Dec 06 15:37:09.188 INFO running `"docker" "inspect" "2d490ad9c33a612739e5b6bd413b96fd6a3bf493809c97748d1d121eacb20815"`
Dec 06 15:37:09.370 INFO running `"docker" "rm" "-f" "2d490ad9c33a612739e5b6bd413b96fd6a3bf493809c97748d1d121eacb20815"`
Dec 06 15:37:09.652 INFO [stdout] 2d490ad9c33a612739e5b6bd413b96fd6a3bf493809c97748d1d121eacb20815
Dec 06 15:37:09.658 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-2/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-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 15:37:10.020 INFO [stdout] e9de907d577e2cd0deaffe955134411b8d8dc28c08b7f93bcf5405ebf0d16dc6
Dec 06 15:37:10.028 INFO running `"docker" "start" "-a" "e9de907d577e2cd0deaffe955134411b8d8dc28c08b7f93bcf5405ebf0d16dc6"`
Dec 06 15:37:11.199 INFO [stderr] usermod: no changes
Dec 06 15:37:11.344 INFO [stderr]    Compiling blockchain v0.1.0 (/source)
Dec 06 15:37:12.466 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:12.466 INFO [stderr]   --> src/main.rs:16:5
Dec 06 15:37:12.466 INFO [stderr]    |
Dec 06 15:37:12.466 INFO [stderr] 16 |     io::stdout().flush();
Dec 06 15:37:12.466 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:12.466 INFO [stderr]    |
Dec 06 15:37:12.466 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 06 15:37:12.466 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:12.466 INFO [stderr] 
Dec 06 15:37:12.466 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:12.466 INFO [stderr]   --> src/main.rs:17:5
Dec 06 15:37:12.466 INFO [stderr]    |
Dec 06 15:37:12.466 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_addr);
Dec 06 15:37:12.466 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:12.466 INFO [stderr]    |
Dec 06 15:37:12.466 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:12.466 INFO [stderr] 
Dec 06 15:37:12.469 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:12.469 INFO [stderr]   --> src/main.rs:19:5
Dec 06 15:37:12.469 INFO [stderr]    |
Dec 06 15:37:12.469 INFO [stderr] 19 |     io::stdout().flush();
Dec 06 15:37:12.469 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:12.469 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:12.470 INFO [stderr] 
Dec 06 15:37:12.470 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:12.470 INFO [stderr]   --> src/main.rs:20:5
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr] 20 |     io::stdin().read_line(&mut difficulty);
Dec 06 15:37:12.470 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:12.470 INFO [stderr] 
Dec 06 15:37:12.470 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:12.470 INFO [stderr]   --> src/main.rs:33:9
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr] 33 |         io::stdout().flush();
Dec 06 15:37:12.470 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:12.470 INFO [stderr] 
Dec 06 15:37:12.470 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:12.470 INFO [stderr]   --> src/main.rs:35:9
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr] 35 |         io::stdin().read_line(&mut choice);
Dec 06 15:37:12.470 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:12.470 INFO [stderr] 
Dec 06 15:37:12.470 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:12.470 INFO [stderr]   --> src/main.rs:50:17
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr] 50 |                 io::stdout().flush();
Dec 06 15:37:12.470 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:12.470 INFO [stderr] 
Dec 06 15:37:12.470 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:12.470 INFO [stderr]   --> src/main.rs:51:17
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr] 51 |                 io::stdin().read_line(&mut sender);
Dec 06 15:37:12.470 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:12.470 INFO [stderr] 
Dec 06 15:37:12.470 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:12.470 INFO [stderr]   --> src/main.rs:53:17
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr] 53 |                 io::stdout().flush();
Dec 06 15:37:12.470 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:12.470 INFO [stderr] 
Dec 06 15:37:12.470 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:12.470 INFO [stderr]   --> src/main.rs:54:17
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr] 54 |                 io::stdin().read_line(&mut receiver);
Dec 06 15:37:12.470 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:12.470 INFO [stderr] 
Dec 06 15:37:12.470 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:12.470 INFO [stderr]   --> src/main.rs:56:17
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr] 56 |                 io::stdout().flush();
Dec 06 15:37:12.470 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:12.470 INFO [stderr] 
Dec 06 15:37:12.470 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:12.470 INFO [stderr]   --> src/main.rs:57:17
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr] 57 |                 io::stdin().read_line(&mut amount);
Dec 06 15:37:12.470 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:12.470 INFO [stderr] 
Dec 06 15:37:12.470 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:12.470 INFO [stderr]   --> src/main.rs:81:21
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr] 81 |                     io::stdout().flush();
Dec 06 15:37:12.470 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:12.470 INFO [stderr] 
Dec 06 15:37:12.470 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:12.470 INFO [stderr]   --> src/main.rs:82:21
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr] 82 |                     io::stdin().read_line(&mut new_diff);
Dec 06 15:37:12.470 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:12.470 INFO [stderr]    |
Dec 06 15:37:12.470 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:12.470 INFO [stderr] 
Dec 06 15:37:12.470 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:12.470 INFO [stderr]   --> src/main.rs:92:17
Dec 06 15:37:12.471 INFO [stderr]    |
Dec 06 15:37:12.471 INFO [stderr] 92 |                 io::stdout().flush();
Dec 06 15:37:12.471 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:12.471 INFO [stderr]    |
Dec 06 15:37:12.471 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:12.471 INFO [stderr] 
Dec 06 15:37:12.471 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:37:12.471 INFO [stderr]   --> src/main.rs:93:17
Dec 06 15:37:12.471 INFO [stderr]    |
Dec 06 15:37:12.471 INFO [stderr] 93 |                 io::stdin().read_line(&mut new_reward);
Dec 06 15:37:12.471 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:37:12.471 INFO [stderr]    |
Dec 06 15:37:12.471 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:37:12.471 INFO [stderr] 
Dec 06 15:37:12.678 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.45s
Dec 06 15:37:12.684 INFO [stderr] su: No module specific data is present
Dec 06 15:37:12.952 INFO running `"docker" "inspect" "e9de907d577e2cd0deaffe955134411b8d8dc28c08b7f93bcf5405ebf0d16dc6"`
Dec 06 15:37:13.018 INFO running `"docker" "rm" "-f" "e9de907d577e2cd0deaffe955134411b8d8dc28c08b7f93bcf5405ebf0d16dc6"`
Dec 06 15:37:13.097 INFO [stdout] e9de907d577e2cd0deaffe955134411b8d8dc28c08b7f93bcf5405ebf0d16dc6
Dec 06 15:37:13.099 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-2/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-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 15:37:13.333 INFO [stdout] d730f5ed4d3ce50138c0b5a67a02e4295cc2bed79d5051d6778739b5bbfa567e
Dec 06 15:37:13.336 INFO running `"docker" "start" "-a" "d730f5ed4d3ce50138c0b5a67a02e4295cc2bed79d5051d6778739b5bbfa567e"`
Dec 06 15:37:13.704 INFO [stderr] usermod: no changes
Dec 06 15:37:13.771 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
Dec 06 15:37:13.783 INFO [stderr]      Running /target/debug/deps/blockchain-50223fe075b1e76c
Dec 06 15:37:13.786 INFO [stdout] 
Dec 06 15:37:13.786 INFO [stdout] running 0 tests
Dec 06 15:37:13.786 INFO [stdout] 
Dec 06 15:37:13.786 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 15:37:13.786 INFO [stdout] 
Dec 06 15:37:13.790 INFO [stderr] su: No module specific data is present
Dec 06 15:37:14.058 INFO running `"docker" "inspect" "d730f5ed4d3ce50138c0b5a67a02e4295cc2bed79d5051d6778739b5bbfa567e"`
Dec 06 15:37:14.228 INFO running `"docker" "rm" "-f" "d730f5ed4d3ce50138c0b5a67a02e4295cc2bed79d5051d6778739b5bbfa567e"`
Dec 06 15:37:14.323 INFO [stdout] d730f5ed4d3ce50138c0b5a67a02e4295cc2bed79d5051d6778739b5bbfa567e