Nov 16 21:24:25.844 INFO testing lezwon/Blockchain-from-Scratch against master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c for pr-55982
Nov 16 21:24:25.846 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-5/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/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 +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-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"`
Nov 16 21:24:26.359 INFO [stdout] 8a4912a94a29adc7ba0964e9b0e3d18d3f55ee43f3c07a1b86417976d9027fc0
Nov 16 21:24:26.367 INFO running `"docker" "start" "-a" "8a4912a94a29adc7ba0964e9b0e3d18d3f55ee43f3c07a1b86417976d9027fc0"`
Nov 16 21:24:27.782 INFO [stderr] usermod: no changes
Nov 16 21:24:27.946 INFO [stderr]    Compiling generic-array v0.9.0
Nov 16 21:24:28.669 INFO [stderr]    Compiling digest v0.7.2
Nov 16 21:24:28.927 INFO [stderr]    Compiling sha2 v0.7.0
Nov 16 21:24:29.856 INFO [stderr]    Compiling blockchain-rust v0.1.0 (/source)
Nov 16 21:24:30.715 INFO [stderr] warning: variable does not need to be mutable
Nov 16 21:24:30.716 INFO [stderr]   --> src/main.rs:94:8
Nov 16 21:24:30.716 INFO [stderr]    |
Nov 16 21:24:30.716 INFO [stderr] 94 |             let mut block_header = BlockHeader{
Nov 16 21:24:30.717 INFO [stderr]    |                 ----^^^^^^^^^^^^
Nov 16 21:24:30.717 INFO [stderr]    |                 |
Nov 16 21:24:30.717 INFO [stderr]    |                 help: remove this `mut`
Nov 16 21:24:30.717 INFO [stderr]    |
Nov 16 21:24:30.718 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 16 21:24:30.718 INFO [stderr] 
Nov 16 21:24:30.728 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:30.728 INFO [stderr]    --> src/main.rs:210:2
Nov 16 21:24:30.728 INFO [stderr]     |
Nov 16 21:24:30.729 INFO [stderr] 210 |     io::stdout().flush();
Nov 16 21:24:30.729 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:30.729 INFO [stderr]     |
Nov 16 21:24:30.729 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Nov 16 21:24:30.730 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:30.730 INFO [stderr] 
Nov 16 21:24:30.730 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:30.730 INFO [stderr]    --> src/main.rs:211:2
Nov 16 21:24:30.731 INFO [stderr]     |
Nov 16 21:24:30.731 INFO [stderr] 211 |     io::stdin().read_line(&mut miner_address);
Nov 16 21:24:30.731 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:30.732 INFO [stderr]     |
Nov 16 21:24:30.732 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:30.732 INFO [stderr] 
Nov 16 21:24:30.733 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:30.733 INFO [stderr]    --> src/main.rs:213:2
Nov 16 21:24:30.733 INFO [stderr]     |
Nov 16 21:24:30.734 INFO [stderr] 213 |     io::stdout().flush();
Nov 16 21:24:30.734 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:30.734 INFO [stderr]     |
Nov 16 21:24:30.735 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:30.735 INFO [stderr] 
Nov 16 21:24:30.735 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:30.735 INFO [stderr]    --> src/main.rs:214:2
Nov 16 21:24:30.736 INFO [stderr]     |
Nov 16 21:24:30.736 INFO [stderr] 214 |     io::stdin().read_line(&mut difficulty_string);
Nov 16 21:24:30.736 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:30.737 INFO [stderr]     |
Nov 16 21:24:30.737 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:30.737 INFO [stderr] 
Nov 16 21:24:30.738 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:30.738 INFO [stderr]    --> src/main.rs:229:3
Nov 16 21:24:30.738 INFO [stderr]     |
Nov 16 21:24:30.739 INFO [stderr] 229 |         io::stdout().flush();
Nov 16 21:24:30.739 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:30.739 INFO [stderr]     |
Nov 16 21:24:30.739 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:30.740 INFO [stderr] 
Nov 16 21:24:30.740 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:30.740 INFO [stderr]    --> src/main.rs:231:3
Nov 16 21:24:30.741 INFO [stderr]     |
Nov 16 21:24:30.741 INFO [stderr] 231 |         io::stdin().read_line(&mut choice);
Nov 16 21:24:30.741 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:30.742 INFO [stderr]     |
Nov 16 21:24:30.742 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:30.742 INFO [stderr] 
Nov 16 21:24:30.747 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:30.747 INFO [stderr]    --> src/main.rs:247:5
Nov 16 21:24:30.747 INFO [stderr]     |
Nov 16 21:24:30.748 INFO [stderr] 247 |                 io::stdout().flush();
Nov 16 21:24:30.748 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:30.748 INFO [stderr]     |
Nov 16 21:24:30.748 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:30.749 INFO [stderr] 
Nov 16 21:24:30.749 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:30.749 INFO [stderr]    --> src/main.rs:248:5
Nov 16 21:24:30.750 INFO [stderr]     |
Nov 16 21:24:30.750 INFO [stderr] 248 |                 io::stdin().read_line(&mut sender);
Nov 16 21:24:30.750 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:30.751 INFO [stderr]     |
Nov 16 21:24:30.751 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:30.751 INFO [stderr] 
Nov 16 21:24:30.751 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:30.752 INFO [stderr]    --> src/main.rs:250:5
Nov 16 21:24:30.752 INFO [stderr]     |
Nov 16 21:24:30.752 INFO [stderr] 250 |                 io::stdout().flush();
Nov 16 21:24:30.753 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:30.753 INFO [stderr]     |
Nov 16 21:24:30.753 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:30.754 INFO [stderr] 
Nov 16 21:24:30.754 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:30.754 INFO [stderr]    --> src/main.rs:251:5
Nov 16 21:24:30.755 INFO [stderr]     |
Nov 16 21:24:30.755 INFO [stderr] 251 |                 io::stdin().read_line(&mut recipient);
Nov 16 21:24:30.755 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:30.756 INFO [stderr]     |
Nov 16 21:24:30.756 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:30.756 INFO [stderr] 
Nov 16 21:24:30.756 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:30.757 INFO [stderr]    --> src/main.rs:253:5
Nov 16 21:24:30.757 INFO [stderr]     |
Nov 16 21:24:30.757 INFO [stderr] 253 |                 io::stdout().flush();
Nov 16 21:24:30.757 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:30.758 INFO [stderr]     |
Nov 16 21:24:30.758 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:30.758 INFO [stderr] 
Nov 16 21:24:30.759 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:30.759 INFO [stderr]    --> src/main.rs:254:5
Nov 16 21:24:30.759 INFO [stderr]     |
Nov 16 21:24:30.760 INFO [stderr] 254 |                 io::stdin().read_line(&mut amount);
Nov 16 21:24:30.760 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:30.760 INFO [stderr]     |
Nov 16 21:24:30.760 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:30.761 INFO [stderr] 
Nov 16 21:24:30.761 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:30.761 INFO [stderr]    --> src/main.rs:274:5
Nov 16 21:24:30.762 INFO [stderr]     |
Nov 16 21:24:30.762 INFO [stderr] 274 |                 io::stdout().flush();
Nov 16 21:24:30.762 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:30.767 INFO [stderr]     |
Nov 16 21:24:30.767 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:30.767 INFO [stderr] 
Nov 16 21:24:30.767 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:30.768 INFO [stderr]    --> src/main.rs:275:5
Nov 16 21:24:30.768 INFO [stderr]     |
Nov 16 21:24:30.768 INFO [stderr] 275 |                 io::stdin().read_line(&mut new_difficulty);
Nov 16 21:24:30.769 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:30.769 INFO [stderr]     |
Nov 16 21:24:30.769 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:30.769 INFO [stderr] 
Nov 16 21:24:30.770 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:30.770 INFO [stderr]    --> src/main.rs:286:5
Nov 16 21:24:30.770 INFO [stderr]     |
Nov 16 21:24:30.771 INFO [stderr] 286 |                 io::stdout().flush();
Nov 16 21:24:30.771 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:30.771 INFO [stderr]     |
Nov 16 21:24:30.772 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:30.772 INFO [stderr] 
Nov 16 21:24:30.772 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:30.773 INFO [stderr]    --> src/main.rs:287:5
Nov 16 21:24:30.773 INFO [stderr]     |
Nov 16 21:24:30.773 INFO [stderr] 287 |                 io::stdin().read_line(&mut new_reward);
Nov 16 21:24:30.773 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:30.774 INFO [stderr]     |
Nov 16 21:24:30.774 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:30.774 INFO [stderr] 
Nov 16 21:24:32.031 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.21s
Nov 16 21:24:32.032 INFO [stderr] su: No module specific data is present
Nov 16 21:24:32.541 INFO running `"docker" "inspect" "8a4912a94a29adc7ba0964e9b0e3d18d3f55ee43f3c07a1b86417976d9027fc0"`
Nov 16 21:24:32.825 INFO running `"docker" "rm" "-f" "8a4912a94a29adc7ba0964e9b0e3d18d3f55ee43f3c07a1b86417976d9027fc0"`
Nov 16 21:24:33.055 INFO [stdout] 8a4912a94a29adc7ba0964e9b0e3d18d3f55ee43f3c07a1b86417976d9027fc0
Nov 16 21:24:33.057 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-5/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/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 +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-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"`
Nov 16 21:24:33.521 INFO [stdout] 874b1d176d4d8a2e297152ab04ea1eb3db3f39c2c77740c4919159846ce57426
Nov 16 21:24:33.527 INFO running `"docker" "start" "-a" "874b1d176d4d8a2e297152ab04ea1eb3db3f39c2c77740c4919159846ce57426"`
Nov 16 21:24:34.846 INFO [stderr] usermod: no changes
Nov 16 21:24:35.042 INFO [stderr]    Compiling blockchain-rust v0.1.0 (/source)
Nov 16 21:24:35.907 INFO [stderr] warning: variable does not need to be mutable
Nov 16 21:24:35.907 INFO [stderr]   --> src/main.rs:94:8
Nov 16 21:24:35.907 INFO [stderr]    |
Nov 16 21:24:35.907 INFO [stderr] 94 |             let mut block_header = BlockHeader{
Nov 16 21:24:35.907 INFO [stderr]    |                 ----^^^^^^^^^^^^
Nov 16 21:24:35.907 INFO [stderr]    |                 |
Nov 16 21:24:35.907 INFO [stderr]    |                 help: remove this `mut`
Nov 16 21:24:35.907 INFO [stderr]    |
Nov 16 21:24:35.907 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 16 21:24:35.907 INFO [stderr] 
Nov 16 21:24:35.927 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:35.927 INFO [stderr]    --> src/main.rs:210:2
Nov 16 21:24:35.927 INFO [stderr]     |
Nov 16 21:24:35.927 INFO [stderr] 210 |     io::stdout().flush();
Nov 16 21:24:35.927 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:35.927 INFO [stderr]     |
Nov 16 21:24:35.927 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Nov 16 21:24:35.927 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:35.927 INFO [stderr] 
Nov 16 21:24:35.927 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:35.927 INFO [stderr]    --> src/main.rs:211:2
Nov 16 21:24:35.927 INFO [stderr]     |
Nov 16 21:24:35.927 INFO [stderr] 211 |     io::stdin().read_line(&mut miner_address);
Nov 16 21:24:35.927 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:35.927 INFO [stderr]     |
Nov 16 21:24:35.927 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:35.927 INFO [stderr] 
Nov 16 21:24:35.927 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:35.927 INFO [stderr]    --> src/main.rs:213:2
Nov 16 21:24:35.927 INFO [stderr]     |
Nov 16 21:24:35.927 INFO [stderr] 213 |     io::stdout().flush();
Nov 16 21:24:35.927 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:35.927 INFO [stderr]     |
Nov 16 21:24:35.927 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:35.927 INFO [stderr] 
Nov 16 21:24:35.927 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:35.927 INFO [stderr]    --> src/main.rs:214:2
Nov 16 21:24:35.927 INFO [stderr]     |
Nov 16 21:24:35.927 INFO [stderr] 214 |     io::stdin().read_line(&mut difficulty_string);
Nov 16 21:24:35.927 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:35.927 INFO [stderr]     |
Nov 16 21:24:35.927 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:35.927 INFO [stderr] 
Nov 16 21:24:35.927 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:35.927 INFO [stderr]    --> src/main.rs:229:3
Nov 16 21:24:35.927 INFO [stderr]     |
Nov 16 21:24:35.927 INFO [stderr] 229 |         io::stdout().flush();
Nov 16 21:24:35.927 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:35.927 INFO [stderr]     |
Nov 16 21:24:35.927 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:35.927 INFO [stderr] 
Nov 16 21:24:35.927 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:35.927 INFO [stderr]    --> src/main.rs:231:3
Nov 16 21:24:35.927 INFO [stderr]     |
Nov 16 21:24:35.927 INFO [stderr] 231 |         io::stdin().read_line(&mut choice);
Nov 16 21:24:35.927 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:35.927 INFO [stderr]     |
Nov 16 21:24:35.927 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:35.927 INFO [stderr] 
Nov 16 21:24:35.927 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:35.927 INFO [stderr]    --> src/main.rs:247:5
Nov 16 21:24:35.927 INFO [stderr]     |
Nov 16 21:24:35.927 INFO [stderr] 247 |                 io::stdout().flush();
Nov 16 21:24:35.927 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:35.927 INFO [stderr]     |
Nov 16 21:24:35.927 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:35.927 INFO [stderr] 
Nov 16 21:24:35.927 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:35.927 INFO [stderr]    --> src/main.rs:248:5
Nov 16 21:24:35.927 INFO [stderr]     |
Nov 16 21:24:35.927 INFO [stderr] 248 |                 io::stdin().read_line(&mut sender);
Nov 16 21:24:35.927 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:35.927 INFO [stderr]     |
Nov 16 21:24:35.927 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:35.927 INFO [stderr] 
Nov 16 21:24:35.928 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:35.928 INFO [stderr]    --> src/main.rs:250:5
Nov 16 21:24:35.928 INFO [stderr]     |
Nov 16 21:24:35.928 INFO [stderr] 250 |                 io::stdout().flush();
Nov 16 21:24:35.928 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:35.928 INFO [stderr]     |
Nov 16 21:24:35.928 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:35.928 INFO [stderr] 
Nov 16 21:24:35.928 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:35.928 INFO [stderr]    --> src/main.rs:251:5
Nov 16 21:24:35.928 INFO [stderr]     |
Nov 16 21:24:35.928 INFO [stderr] 251 |                 io::stdin().read_line(&mut recipient);
Nov 16 21:24:35.928 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:35.928 INFO [stderr]     |
Nov 16 21:24:35.928 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:35.928 INFO [stderr] 
Nov 16 21:24:35.928 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:35.928 INFO [stderr]    --> src/main.rs:253:5
Nov 16 21:24:35.928 INFO [stderr]     |
Nov 16 21:24:35.928 INFO [stderr] 253 |                 io::stdout().flush();
Nov 16 21:24:35.928 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:35.928 INFO [stderr]     |
Nov 16 21:24:35.928 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:35.928 INFO [stderr] 
Nov 16 21:24:35.928 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:35.928 INFO [stderr]    --> src/main.rs:254:5
Nov 16 21:24:35.928 INFO [stderr]     |
Nov 16 21:24:35.928 INFO [stderr] 254 |                 io::stdin().read_line(&mut amount);
Nov 16 21:24:35.928 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:35.928 INFO [stderr]     |
Nov 16 21:24:35.928 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:35.928 INFO [stderr] 
Nov 16 21:24:35.928 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:35.928 INFO [stderr]    --> src/main.rs:274:5
Nov 16 21:24:35.928 INFO [stderr]     |
Nov 16 21:24:35.928 INFO [stderr] 274 |                 io::stdout().flush();
Nov 16 21:24:35.928 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:35.928 INFO [stderr]     |
Nov 16 21:24:35.928 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:35.928 INFO [stderr] 
Nov 16 21:24:35.928 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:35.928 INFO [stderr]    --> src/main.rs:275:5
Nov 16 21:24:35.928 INFO [stderr]     |
Nov 16 21:24:35.928 INFO [stderr] 275 |                 io::stdin().read_line(&mut new_difficulty);
Nov 16 21:24:35.928 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:35.928 INFO [stderr]     |
Nov 16 21:24:35.928 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:35.928 INFO [stderr] 
Nov 16 21:24:35.928 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:35.928 INFO [stderr]    --> src/main.rs:286:5
Nov 16 21:24:35.928 INFO [stderr]     |
Nov 16 21:24:35.928 INFO [stderr] 286 |                 io::stdout().flush();
Nov 16 21:24:35.928 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:35.928 INFO [stderr]     |
Nov 16 21:24:35.928 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:35.928 INFO [stderr] 
Nov 16 21:24:35.928 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 16 21:24:35.928 INFO [stderr]    --> src/main.rs:287:5
Nov 16 21:24:35.928 INFO [stderr]     |
Nov 16 21:24:35.928 INFO [stderr] 287 |                 io::stdin().read_line(&mut new_reward);
Nov 16 21:24:35.928 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 16 21:24:35.928 INFO [stderr]     |
Nov 16 21:24:35.928 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 16 21:24:35.928 INFO [stderr] 
Nov 16 21:24:36.271 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.39s
Nov 16 21:24:36.292 INFO [stderr] su: No module specific data is present
Nov 16 21:24:37.020 INFO running `"docker" "inspect" "874b1d176d4d8a2e297152ab04ea1eb3db3f39c2c77740c4919159846ce57426"`
Nov 16 21:24:37.501 INFO running `"docker" "rm" "-f" "874b1d176d4d8a2e297152ab04ea1eb3db3f39c2c77740c4919159846ce57426"`
Nov 16 21:24:37.915 INFO [stdout] 874b1d176d4d8a2e297152ab04ea1eb3db3f39c2c77740c4919159846ce57426
Nov 16 21:24:37.919 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-5/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/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 +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-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"`
Nov 16 21:24:38.443 INFO [stdout] 881c7cc39c7d500851f74409504aebbca1677a0d27f99faecb04414c9b4cde50
Nov 16 21:24:38.447 INFO running `"docker" "start" "-a" "881c7cc39c7d500851f74409504aebbca1677a0d27f99faecb04414c9b4cde50"`
Nov 16 21:24:40.087 INFO [stderr] usermod: no changes
Nov 16 21:24:40.227 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.09s
Nov 16 21:24:40.239 INFO [stdout] 
Nov 16 21:24:40.239 INFO [stdout] running 0 tests
Nov 16 21:24:40.239 INFO [stdout] 
Nov 16 21:24:40.239 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Nov 16 21:24:40.239 INFO [stdout] 
Nov 16 21:24:40.239 INFO [stderr]      Running /target/debug/deps/blockchain_rust-693e3794cd31a736
Nov 16 21:24:40.243 INFO [stderr] su: No module specific data is present
Nov 16 21:24:40.836 INFO running `"docker" "inspect" "881c7cc39c7d500851f74409504aebbca1677a0d27f99faecb04414c9b4cde50"`
Nov 16 21:24:41.109 INFO running `"docker" "rm" "-f" "881c7cc39c7d500851f74409504aebbca1677a0d27f99faecb04414c9b4cde50"`
Nov 16 21:24:41.530 INFO [stdout] 881c7cc39c7d500851f74409504aebbca1677a0d27f99faecb04414c9b4cde50