Dec 06 03:50:02.681 INFO testing christiansakai/toy_blockchain_rust against master#906deae0790bd18681b937fe9a141a3c26cf1855 for pr-56514
Dec 06 03:50:02.681 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 03:50:03.224 INFO [stdout] 987029600fefbffc3ef6c7b9e03994c65dec5f06ae399292a0247691c453e3a7
Dec 06 03:50:03.228 INFO running `"docker" "start" "-a" "987029600fefbffc3ef6c7b9e03994c65dec5f06ae399292a0247691c453e3a7"`
Dec 06 03:50:04.594 INFO [stderr] usermod: no changes
Dec 06 03:50:04.740 INFO [stderr]    Compiling toy_blockchain v0.1.0 (/source)
Dec 06 03:50:05.841 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:05.841 INFO [stderr]   --> src/main.rs:16:5
Dec 06 03:50:05.841 INFO [stderr]    |
Dec 06 03:50:05.841 INFO [stderr] 16 |     io::stdout().flush();
Dec 06 03:50:05.841 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:05.841 INFO [stderr]    |
Dec 06 03:50:05.841 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 06 03:50:05.841 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:05.841 INFO [stderr] 
Dec 06 03:50:05.841 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:05.841 INFO [stderr]   --> src/main.rs:17:5
Dec 06 03:50:05.841 INFO [stderr]    |
Dec 06 03:50:05.841 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_address);
Dec 06 03:50:05.841 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:05.841 INFO [stderr]    |
Dec 06 03:50:05.841 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:05.841 INFO [stderr] 
Dec 06 03:50:05.841 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:05.841 INFO [stderr]   --> src/main.rs:19:5
Dec 06 03:50:05.841 INFO [stderr]    |
Dec 06 03:50:05.842 INFO [stderr] 19 |     io::stdout().flush();
Dec 06 03:50:05.842 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:05.842 INFO [stderr]    |
Dec 06 03:50:05.842 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:05.842 INFO [stderr] 
Dec 06 03:50:05.842 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:05.842 INFO [stderr]   --> src/main.rs:20:5
Dec 06 03:50:05.842 INFO [stderr]    |
Dec 06 03:50:05.842 INFO [stderr] 20 |     io::stdin().read_line(&mut difficulty);
Dec 06 03:50:05.842 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:05.842 INFO [stderr]    |
Dec 06 03:50:05.842 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:05.842 INFO [stderr] 
Dec 06 03:50:05.842 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:05.842 INFO [stderr]   --> src/main.rs:38:9
Dec 06 03:50:05.842 INFO [stderr]    |
Dec 06 03:50:05.842 INFO [stderr] 38 |         io::stdout().flush();
Dec 06 03:50:05.842 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:05.842 INFO [stderr]    |
Dec 06 03:50:05.842 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:05.842 INFO [stderr] 
Dec 06 03:50:05.842 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:05.843 INFO [stderr]   --> src/main.rs:41:9
Dec 06 03:50:05.843 INFO [stderr]    |
Dec 06 03:50:05.843 INFO [stderr] 41 |         io::stdin().read_line(&mut choice);
Dec 06 03:50:05.843 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:05.843 INFO [stderr]    |
Dec 06 03:50:05.843 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:05.843 INFO [stderr] 
Dec 06 03:50:05.843 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:05.843 INFO [stderr]   --> src/main.rs:57:17
Dec 06 03:50:05.843 INFO [stderr]    |
Dec 06 03:50:05.843 INFO [stderr] 57 |                 io::stdout().flush();
Dec 06 03:50:05.843 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:05.843 INFO [stderr]    |
Dec 06 03:50:05.843 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:05.843 INFO [stderr] 
Dec 06 03:50:05.843 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:05.843 INFO [stderr]   --> src/main.rs:58:17
Dec 06 03:50:05.843 INFO [stderr]    |
Dec 06 03:50:05.843 INFO [stderr] 58 |                 io::stdin().read_line(&mut sender);
Dec 06 03:50:05.843 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:05.843 INFO [stderr]    |
Dec 06 03:50:05.843 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:05.843 INFO [stderr] 
Dec 06 03:50:05.843 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:05.843 INFO [stderr]   --> src/main.rs:60:17
Dec 06 03:50:05.843 INFO [stderr]    |
Dec 06 03:50:05.843 INFO [stderr] 60 |                 io::stdout().flush();
Dec 06 03:50:05.843 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:05.843 INFO [stderr]    |
Dec 06 03:50:05.843 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:05.843 INFO [stderr] 
Dec 06 03:50:05.843 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:05.843 INFO [stderr]   --> src/main.rs:61:17
Dec 06 03:50:05.843 INFO [stderr]    |
Dec 06 03:50:05.843 INFO [stderr] 61 |                 io::stdin().read_line(&mut receiver);
Dec 06 03:50:05.843 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:05.843 INFO [stderr]    |
Dec 06 03:50:05.843 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:05.843 INFO [stderr] 
Dec 06 03:50:05.843 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:05.843 INFO [stderr]   --> src/main.rs:63:17
Dec 06 03:50:05.843 INFO [stderr]    |
Dec 06 03:50:05.843 INFO [stderr] 63 |                 io::stdout().flush();
Dec 06 03:50:05.843 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:05.843 INFO [stderr]    |
Dec 06 03:50:05.843 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:05.843 INFO [stderr] 
Dec 06 03:50:05.843 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:05.843 INFO [stderr]   --> src/main.rs:64:17
Dec 06 03:50:05.843 INFO [stderr]    |
Dec 06 03:50:05.843 INFO [stderr] 64 |                 io::stdin().read_line(&mut amount);
Dec 06 03:50:05.843 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:05.843 INFO [stderr]    |
Dec 06 03:50:05.843 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:05.843 INFO [stderr] 
Dec 06 03:50:05.843 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:05.843 INFO [stderr]   --> src/main.rs:90:17
Dec 06 03:50:05.843 INFO [stderr]    |
Dec 06 03:50:05.843 INFO [stderr] 90 |                 io::stdout().flush();
Dec 06 03:50:05.843 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:05.843 INFO [stderr]    |
Dec 06 03:50:05.843 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:05.843 INFO [stderr] 
Dec 06 03:50:05.843 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:05.843 INFO [stderr]   --> src/main.rs:91:17
Dec 06 03:50:05.843 INFO [stderr]    |
Dec 06 03:50:05.843 INFO [stderr] 91 |                 io::stdin().read_line(&mut new_difficulty);
Dec 06 03:50:05.843 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:05.843 INFO [stderr]    |
Dec 06 03:50:05.843 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:05.843 INFO [stderr] 
Dec 06 03:50:05.843 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:05.843 INFO [stderr]    --> src/main.rs:105:17
Dec 06 03:50:05.843 INFO [stderr]     |
Dec 06 03:50:05.843 INFO [stderr] 105 |                 io::stdout().flush();
Dec 06 03:50:05.843 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:05.843 INFO [stderr]     |
Dec 06 03:50:05.843 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:05.843 INFO [stderr] 
Dec 06 03:50:05.843 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:05.843 INFO [stderr]    --> src/main.rs:106:17
Dec 06 03:50:05.843 INFO [stderr]     |
Dec 06 03:50:05.843 INFO [stderr] 106 |                 io::stdin().read_line(&mut new_reward);
Dec 06 03:50:05.843 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:05.843 INFO [stderr]     |
Dec 06 03:50:05.843 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:05.843 INFO [stderr] 
Dec 06 03:50:06.996 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.37s
Dec 06 03:50:07.000 INFO [stderr] su: No module specific data is present
Dec 06 03:50:07.598 INFO running `"docker" "inspect" "987029600fefbffc3ef6c7b9e03994c65dec5f06ae399292a0247691c453e3a7"`
Dec 06 03:50:07.884 INFO running `"docker" "rm" "-f" "987029600fefbffc3ef6c7b9e03994c65dec5f06ae399292a0247691c453e3a7"`
Dec 06 03:50:08.154 INFO [stdout] 987029600fefbffc3ef6c7b9e03994c65dec5f06ae399292a0247691c453e3a7
Dec 06 03:50:08.164 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 03:50:08.599 INFO [stdout] 384c7a029e7e198265bcb451b958b2156a4c4e016fd631f2acad4f63bfd2c00a
Dec 06 03:50:08.604 INFO running `"docker" "start" "-a" "384c7a029e7e198265bcb451b958b2156a4c4e016fd631f2acad4f63bfd2c00a"`
Dec 06 03:50:09.899 INFO [stderr] usermod: no changes
Dec 06 03:50:09.982 INFO [stderr]    Compiling toy_blockchain v0.1.0 (/source)
Dec 06 03:50:10.898 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:10.898 INFO [stderr]   --> src/main.rs:16:5
Dec 06 03:50:10.898 INFO [stderr]    |
Dec 06 03:50:10.898 INFO [stderr] 16 |     io::stdout().flush();
Dec 06 03:50:10.898 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:10.898 INFO [stderr]    |
Dec 06 03:50:10.898 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 06 03:50:10.898 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:10.898 INFO [stderr] 
Dec 06 03:50:10.898 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:10.898 INFO [stderr]   --> src/main.rs:17:5
Dec 06 03:50:10.898 INFO [stderr]    |
Dec 06 03:50:10.898 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_address);
Dec 06 03:50:10.898 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:10.898 INFO [stderr]    |
Dec 06 03:50:10.898 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:10.898 INFO [stderr] 
Dec 06 03:50:10.898 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:10.898 INFO [stderr]   --> src/main.rs:19:5
Dec 06 03:50:10.898 INFO [stderr]    |
Dec 06 03:50:10.899 INFO [stderr] 19 |     io::stdout().flush();
Dec 06 03:50:10.899 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:10.899 INFO [stderr]    |
Dec 06 03:50:10.899 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:10.899 INFO [stderr] 
Dec 06 03:50:10.899 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:10.899 INFO [stderr]   --> src/main.rs:20:5
Dec 06 03:50:10.899 INFO [stderr]    |
Dec 06 03:50:10.899 INFO [stderr] 20 |     io::stdin().read_line(&mut difficulty);
Dec 06 03:50:10.899 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:10.899 INFO [stderr]    |
Dec 06 03:50:10.899 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:10.899 INFO [stderr] 
Dec 06 03:50:10.899 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:10.899 INFO [stderr]   --> src/main.rs:38:9
Dec 06 03:50:10.899 INFO [stderr]    |
Dec 06 03:50:10.899 INFO [stderr] 38 |         io::stdout().flush();
Dec 06 03:50:10.899 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:10.899 INFO [stderr]    |
Dec 06 03:50:10.899 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:10.899 INFO [stderr] 
Dec 06 03:50:10.899 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:10.899 INFO [stderr]   --> src/main.rs:41:9
Dec 06 03:50:10.899 INFO [stderr]    |
Dec 06 03:50:10.899 INFO [stderr] 41 |         io::stdin().read_line(&mut choice);
Dec 06 03:50:10.899 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:10.899 INFO [stderr]    |
Dec 06 03:50:10.899 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:10.899 INFO [stderr] 
Dec 06 03:50:10.899 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:10.899 INFO [stderr]   --> src/main.rs:57:17
Dec 06 03:50:10.899 INFO [stderr]    |
Dec 06 03:50:10.899 INFO [stderr] 57 |                 io::stdout().flush();
Dec 06 03:50:10.899 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:10.899 INFO [stderr]    |
Dec 06 03:50:10.899 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:10.899 INFO [stderr] 
Dec 06 03:50:10.899 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:10.899 INFO [stderr]   --> src/main.rs:58:17
Dec 06 03:50:10.899 INFO [stderr]    |
Dec 06 03:50:10.899 INFO [stderr] 58 |                 io::stdin().read_line(&mut sender);
Dec 06 03:50:10.899 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:10.899 INFO [stderr]    |
Dec 06 03:50:10.899 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:10.900 INFO [stderr] 
Dec 06 03:50:10.900 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:10.900 INFO [stderr]   --> src/main.rs:60:17
Dec 06 03:50:10.900 INFO [stderr]    |
Dec 06 03:50:10.900 INFO [stderr] 60 |                 io::stdout().flush();
Dec 06 03:50:10.900 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:10.900 INFO [stderr]    |
Dec 06 03:50:10.900 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:10.900 INFO [stderr] 
Dec 06 03:50:10.900 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:10.900 INFO [stderr]   --> src/main.rs:61:17
Dec 06 03:50:10.900 INFO [stderr]    |
Dec 06 03:50:10.900 INFO [stderr] 61 |                 io::stdin().read_line(&mut receiver);
Dec 06 03:50:10.900 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:10.900 INFO [stderr]    |
Dec 06 03:50:10.900 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:10.900 INFO [stderr] 
Dec 06 03:50:10.900 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:10.900 INFO [stderr]   --> src/main.rs:63:17
Dec 06 03:50:10.900 INFO [stderr]    |
Dec 06 03:50:10.900 INFO [stderr] 63 |                 io::stdout().flush();
Dec 06 03:50:10.900 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:10.900 INFO [stderr]    |
Dec 06 03:50:10.900 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:10.900 INFO [stderr] 
Dec 06 03:50:10.900 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:10.900 INFO [stderr]   --> src/main.rs:64:17
Dec 06 03:50:10.900 INFO [stderr]    |
Dec 06 03:50:10.900 INFO [stderr] 64 |                 io::stdin().read_line(&mut amount);
Dec 06 03:50:10.900 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:10.900 INFO [stderr]    |
Dec 06 03:50:10.900 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:10.900 INFO [stderr] 
Dec 06 03:50:10.900 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:10.900 INFO [stderr]   --> src/main.rs:90:17
Dec 06 03:50:10.900 INFO [stderr]    |
Dec 06 03:50:10.900 INFO [stderr] 90 |                 io::stdout().flush();
Dec 06 03:50:10.900 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:10.900 INFO [stderr]    |
Dec 06 03:50:10.900 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:10.900 INFO [stderr] 
Dec 06 03:50:10.900 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:10.900 INFO [stderr]   --> src/main.rs:91:17
Dec 06 03:50:10.900 INFO [stderr]    |
Dec 06 03:50:10.900 INFO [stderr] 91 |                 io::stdin().read_line(&mut new_difficulty);
Dec 06 03:50:10.900 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:10.900 INFO [stderr]    |
Dec 06 03:50:10.900 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:10.900 INFO [stderr] 
Dec 06 03:50:10.900 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:10.900 INFO [stderr]    --> src/main.rs:105:17
Dec 06 03:50:10.900 INFO [stderr]     |
Dec 06 03:50:10.900 INFO [stderr] 105 |                 io::stdout().flush();
Dec 06 03:50:10.900 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:10.900 INFO [stderr]     |
Dec 06 03:50:10.900 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:10.900 INFO [stderr] 
Dec 06 03:50:10.900 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:50:10.900 INFO [stderr]    --> src/main.rs:106:17
Dec 06 03:50:10.900 INFO [stderr]     |
Dec 06 03:50:10.900 INFO [stderr] 106 |                 io::stdin().read_line(&mut new_reward);
Dec 06 03:50:10.900 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:50:10.900 INFO [stderr]     |
Dec 06 03:50:10.900 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:50:10.900 INFO [stderr] 
Dec 06 03:50:11.141 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.22s
Dec 06 03:50:11.142 INFO [stderr] su: No module specific data is present
Dec 06 03:50:11.474 INFO running `"docker" "inspect" "384c7a029e7e198265bcb451b958b2156a4c4e016fd631f2acad4f63bfd2c00a"`
Dec 06 03:50:11.662 INFO running `"docker" "rm" "-f" "384c7a029e7e198265bcb451b958b2156a4c4e016fd631f2acad4f63bfd2c00a"`
Dec 06 03:50:11.860 INFO [stdout] 384c7a029e7e198265bcb451b958b2156a4c4e016fd631f2acad4f63bfd2c00a
Dec 06 03:50:11.869 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 03:50:12.256 INFO [stdout] 8a230c87edfc9b6aa05a080db78351abbde9f63b9b03e468c7c9ab5229dc7acd
Dec 06 03:50:12.262 INFO running `"docker" "start" "-a" "8a230c87edfc9b6aa05a080db78351abbde9f63b9b03e468c7c9ab5229dc7acd"`
Dec 06 03:50:13.391 INFO [stderr] usermod: no changes
Dec 06 03:50:13.492 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
Dec 06 03:50:13.504 INFO [stderr]      Running /target/debug/deps/toy_blockchain-f2cfaca0aa03ad04
Dec 06 03:50:13.506 INFO [stdout] 
Dec 06 03:50:13.506 INFO [stdout] running 0 tests
Dec 06 03:50:13.506 INFO [stdout] 
Dec 06 03:50:13.506 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 03:50:13.506 INFO [stdout] 
Dec 06 03:50:13.508 INFO [stderr] su: No module specific data is present
Dec 06 03:50:14.072 INFO running `"docker" "inspect" "8a230c87edfc9b6aa05a080db78351abbde9f63b9b03e468c7c9ab5229dc7acd"`
Dec 06 03:50:14.295 INFO running `"docker" "rm" "-f" "8a230c87edfc9b6aa05a080db78351abbde9f63b9b03e468c7c9ab5229dc7acd"`
Dec 06 03:50:14.600 INFO [stdout] 8a230c87edfc9b6aa05a080db78351abbde9f63b9b03e468c7c9ab5229dc7acd