Dec 13 23:40:45.256 INFO testing christiansakai/toy_blockchain_rust against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 13 23:40:45.256 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-0/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 23:40:45.784 INFO [stdout] 7f3e4f4ab1d9f10fcab822b00194a8569c66e781ede0c2034ec5c1d95d81cc51
Dec 13 23:40:45.788 INFO running `"docker" "start" "-a" "7f3e4f4ab1d9f10fcab822b00194a8569c66e781ede0c2034ec5c1d95d81cc51"`
Dec 13 23:40:46.891 INFO [stderr] usermod: no changes
Dec 13 23:40:47.039 INFO [stderr]    Compiling toy_blockchain v0.1.0 (/source)
Dec 13 23:40:48.344 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:48.344 INFO [stderr]   --> src/main.rs:16:5
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr] 16 |     io::stdout().flush();
Dec 13 23:40:48.344 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 13 23:40:48.344 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:48.344 INFO [stderr] 
Dec 13 23:40:48.344 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:48.344 INFO [stderr]   --> src/main.rs:17:5
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_address);
Dec 13 23:40:48.344 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:48.344 INFO [stderr] 
Dec 13 23:40:48.344 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:48.344 INFO [stderr]   --> src/main.rs:19:5
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr] 19 |     io::stdout().flush();
Dec 13 23:40:48.344 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:48.344 INFO [stderr] 
Dec 13 23:40:48.344 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:48.344 INFO [stderr]   --> src/main.rs:20:5
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr] 20 |     io::stdin().read_line(&mut difficulty);
Dec 13 23:40:48.344 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:48.344 INFO [stderr] 
Dec 13 23:40:48.344 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:48.344 INFO [stderr]   --> src/main.rs:38:9
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr] 38 |         io::stdout().flush();
Dec 13 23:40:48.344 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:48.344 INFO [stderr] 
Dec 13 23:40:48.344 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:48.344 INFO [stderr]   --> src/main.rs:41:9
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr] 41 |         io::stdin().read_line(&mut choice);
Dec 13 23:40:48.344 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:48.344 INFO [stderr] 
Dec 13 23:40:48.344 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:48.344 INFO [stderr]   --> src/main.rs:57:17
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr] 57 |                 io::stdout().flush();
Dec 13 23:40:48.344 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:48.344 INFO [stderr] 
Dec 13 23:40:48.344 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:48.344 INFO [stderr]   --> src/main.rs:58:17
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr] 58 |                 io::stdin().read_line(&mut sender);
Dec 13 23:40:48.344 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:48.344 INFO [stderr] 
Dec 13 23:40:48.344 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:48.344 INFO [stderr]   --> src/main.rs:60:17
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr] 60 |                 io::stdout().flush();
Dec 13 23:40:48.344 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:48.344 INFO [stderr] 
Dec 13 23:40:48.344 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:48.344 INFO [stderr]   --> src/main.rs:61:17
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr] 61 |                 io::stdin().read_line(&mut receiver);
Dec 13 23:40:48.344 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:48.344 INFO [stderr] 
Dec 13 23:40:48.344 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:48.344 INFO [stderr]   --> src/main.rs:63:17
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr] 63 |                 io::stdout().flush();
Dec 13 23:40:48.344 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:48.344 INFO [stderr]    |
Dec 13 23:40:48.344 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:48.345 INFO [stderr] 
Dec 13 23:40:48.345 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:48.345 INFO [stderr]   --> src/main.rs:64:17
Dec 13 23:40:48.345 INFO [stderr]    |
Dec 13 23:40:48.345 INFO [stderr] 64 |                 io::stdin().read_line(&mut amount);
Dec 13 23:40:48.345 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:48.345 INFO [stderr]    |
Dec 13 23:40:48.345 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:48.345 INFO [stderr] 
Dec 13 23:40:48.348 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:48.348 INFO [stderr]   --> src/main.rs:90:17
Dec 13 23:40:48.348 INFO [stderr]    |
Dec 13 23:40:48.348 INFO [stderr] 90 |                 io::stdout().flush();
Dec 13 23:40:48.348 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:48.348 INFO [stderr]    |
Dec 13 23:40:48.348 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:48.348 INFO [stderr] 
Dec 13 23:40:48.348 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:48.348 INFO [stderr]   --> src/main.rs:91:17
Dec 13 23:40:48.348 INFO [stderr]    |
Dec 13 23:40:48.348 INFO [stderr] 91 |                 io::stdin().read_line(&mut new_difficulty);
Dec 13 23:40:48.348 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:48.348 INFO [stderr]    |
Dec 13 23:40:48.348 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:48.348 INFO [stderr] 
Dec 13 23:40:48.348 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:48.348 INFO [stderr]    --> src/main.rs:105:17
Dec 13 23:40:48.348 INFO [stderr]     |
Dec 13 23:40:48.348 INFO [stderr] 105 |                 io::stdout().flush();
Dec 13 23:40:48.348 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:48.348 INFO [stderr]     |
Dec 13 23:40:48.348 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:48.348 INFO [stderr] 
Dec 13 23:40:48.348 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:48.348 INFO [stderr]    --> src/main.rs:106:17
Dec 13 23:40:48.348 INFO [stderr]     |
Dec 13 23:40:48.348 INFO [stderr] 106 |                 io::stdin().read_line(&mut new_reward);
Dec 13 23:40:48.348 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:48.348 INFO [stderr]     |
Dec 13 23:40:48.348 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:48.348 INFO [stderr] 
Dec 13 23:40:49.440 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.46s
Dec 13 23:40:49.440 INFO [stderr] su: No module specific data is present
Dec 13 23:40:50.110 INFO running `"docker" "inspect" "7f3e4f4ab1d9f10fcab822b00194a8569c66e781ede0c2034ec5c1d95d81cc51"`
Dec 13 23:40:50.482 INFO running `"docker" "rm" "-f" "7f3e4f4ab1d9f10fcab822b00194a8569c66e781ede0c2034ec5c1d95d81cc51"`
Dec 13 23:40:50.927 INFO [stdout] 7f3e4f4ab1d9f10fcab822b00194a8569c66e781ede0c2034ec5c1d95d81cc51
Dec 13 23:40:50.933 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-0/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 23:40:51.344 INFO [stdout] 3647a188a3bc9e7f64bedd089896b87f7518f8b99f566141e37f95fa158a3432
Dec 13 23:40:51.353 INFO running `"docker" "start" "-a" "3647a188a3bc9e7f64bedd089896b87f7518f8b99f566141e37f95fa158a3432"`
Dec 13 23:40:52.269 INFO [stderr] usermod: no changes
Dec 13 23:40:52.336 INFO [stderr]    Compiling toy_blockchain v0.1.0 (/source)
Dec 13 23:40:53.287 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:53.287 INFO [stderr]   --> src/main.rs:16:5
Dec 13 23:40:53.287 INFO [stderr]    |
Dec 13 23:40:53.287 INFO [stderr] 16 |     io::stdout().flush();
Dec 13 23:40:53.287 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:53.287 INFO [stderr]    |
Dec 13 23:40:53.287 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 13 23:40:53.287 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:53.287 INFO [stderr] 
Dec 13 23:40:53.287 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:53.287 INFO [stderr]   --> src/main.rs:17:5
Dec 13 23:40:53.287 INFO [stderr]    |
Dec 13 23:40:53.287 INFO [stderr] 17 |     io::stdin().read_line(&mut miner_address);
Dec 13 23:40:53.287 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:53.287 INFO [stderr]    |
Dec 13 23:40:53.287 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:53.287 INFO [stderr] 
Dec 13 23:40:53.287 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:53.287 INFO [stderr]   --> src/main.rs:19:5
Dec 13 23:40:53.287 INFO [stderr]    |
Dec 13 23:40:53.287 INFO [stderr] 19 |     io::stdout().flush();
Dec 13 23:40:53.287 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:53.288 INFO [stderr] 
Dec 13 23:40:53.288 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:53.288 INFO [stderr]   --> src/main.rs:20:5
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr] 20 |     io::stdin().read_line(&mut difficulty);
Dec 13 23:40:53.288 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:53.288 INFO [stderr] 
Dec 13 23:40:53.288 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:53.288 INFO [stderr]   --> src/main.rs:38:9
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr] 38 |         io::stdout().flush();
Dec 13 23:40:53.288 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:53.288 INFO [stderr] 
Dec 13 23:40:53.288 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:53.288 INFO [stderr]   --> src/main.rs:41:9
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr] 41 |         io::stdin().read_line(&mut choice);
Dec 13 23:40:53.288 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:53.288 INFO [stderr] 
Dec 13 23:40:53.288 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:53.288 INFO [stderr]   --> src/main.rs:57:17
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr] 57 |                 io::stdout().flush();
Dec 13 23:40:53.288 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:53.288 INFO [stderr] 
Dec 13 23:40:53.288 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:53.288 INFO [stderr]   --> src/main.rs:58:17
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr] 58 |                 io::stdin().read_line(&mut sender);
Dec 13 23:40:53.288 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:53.288 INFO [stderr] 
Dec 13 23:40:53.288 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:53.288 INFO [stderr]   --> src/main.rs:60:17
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr] 60 |                 io::stdout().flush();
Dec 13 23:40:53.288 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:53.288 INFO [stderr] 
Dec 13 23:40:53.288 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:53.288 INFO [stderr]   --> src/main.rs:61:17
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr] 61 |                 io::stdin().read_line(&mut receiver);
Dec 13 23:40:53.288 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:53.288 INFO [stderr] 
Dec 13 23:40:53.288 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:53.288 INFO [stderr]   --> src/main.rs:63:17
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr] 63 |                 io::stdout().flush();
Dec 13 23:40:53.288 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:53.288 INFO [stderr] 
Dec 13 23:40:53.288 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:53.288 INFO [stderr]   --> src/main.rs:64:17
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr] 64 |                 io::stdin().read_line(&mut amount);
Dec 13 23:40:53.288 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:53.288 INFO [stderr] 
Dec 13 23:40:53.288 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:53.288 INFO [stderr]   --> src/main.rs:90:17
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr] 90 |                 io::stdout().flush();
Dec 13 23:40:53.288 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:53.288 INFO [stderr] 
Dec 13 23:40:53.288 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:53.288 INFO [stderr]   --> src/main.rs:91:17
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.288 INFO [stderr] 91 |                 io::stdin().read_line(&mut new_difficulty);
Dec 13 23:40:53.288 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:53.288 INFO [stderr]    |
Dec 13 23:40:53.289 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:53.289 INFO [stderr] 
Dec 13 23:40:53.289 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:53.289 INFO [stderr]    --> src/main.rs:105:17
Dec 13 23:40:53.289 INFO [stderr]     |
Dec 13 23:40:53.289 INFO [stderr] 105 |                 io::stdout().flush();
Dec 13 23:40:53.289 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:53.289 INFO [stderr]     |
Dec 13 23:40:53.289 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:53.289 INFO [stderr] 
Dec 13 23:40:53.289 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 23:40:53.289 INFO [stderr]    --> src/main.rs:106:17
Dec 13 23:40:53.289 INFO [stderr]     |
Dec 13 23:40:53.289 INFO [stderr] 106 |                 io::stdin().read_line(&mut new_reward);
Dec 13 23:40:53.289 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 23:40:53.289 INFO [stderr]     |
Dec 13 23:40:53.289 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 23:40:53.289 INFO [stderr] 
Dec 13 23:40:53.630 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.33s
Dec 13 23:40:53.630 INFO [stderr] su: No module specific data is present
Dec 13 23:40:54.195 INFO running `"docker" "inspect" "3647a188a3bc9e7f64bedd089896b87f7518f8b99f566141e37f95fa158a3432"`
Dec 13 23:40:54.309 INFO running `"docker" "rm" "-f" "3647a188a3bc9e7f64bedd089896b87f7518f8b99f566141e37f95fa158a3432"`
Dec 13 23:40:54.497 INFO [stdout] 3647a188a3bc9e7f64bedd089896b87f7518f8b99f566141e37f95fa158a3432
Dec 13 23:40:54.503 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-0/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 23:40:54.781 INFO [stdout] 402908cae4fd211e6d3b08f1ed41ac19e69ee5af4dca63821e0c14e72f8a65e4
Dec 13 23:40:54.784 INFO running `"docker" "start" "-a" "402908cae4fd211e6d3b08f1ed41ac19e69ee5af4dca63821e0c14e72f8a65e4"`
Dec 13 23:40:55.888 INFO [stderr] usermod: no changes
Dec 13 23:40:55.999 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
Dec 13 23:40:56.010 INFO [stderr]      Running /target/debug/deps/toy_blockchain-9f87d5d2d7dd9f11
Dec 13 23:40:56.023 INFO [stdout] 
Dec 13 23:40:56.023 INFO [stdout] running 0 tests
Dec 13 23:40:56.023 INFO [stdout] 
Dec 13 23:40:56.023 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 13 23:40:56.023 INFO [stdout] 
Dec 13 23:40:56.035 INFO [stderr] su: No module specific data is present
Dec 13 23:40:56.715 INFO running `"docker" "inspect" "402908cae4fd211e6d3b08f1ed41ac19e69ee5af4dca63821e0c14e72f8a65e4"`
Dec 13 23:40:57.003 INFO running `"docker" "rm" "-f" "402908cae4fd211e6d3b08f1ed41ac19e69ee5af4dca63821e0c14e72f8a65e4"`
Dec 13 23:40:57.267 INFO [stdout] 402908cae4fd211e6d3b08f1ed41ac19e69ee5af4dca63821e0c14e72f8a65e4