Dec 19 15:55:50.081 INFO checking iThinkyouknow/rust-blockchain against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 15:55:50.081 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-6/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/iThinkyouknow/rust-blockchain:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 15:55:50.594 INFO [stdout] 13d2e7131ff97b2a4ac34861f5e3c42a321d02ab859dcd20921f223fbe964c15
Dec 19 15:55:50.600 INFO running `"docker" "start" "-a" "13d2e7131ff97b2a4ac34861f5e3c42a321d02ab859dcd20921f223fbe964c15"`
Dec 19 15:55:53.186 INFO [stderr]     Checking blockchain v0.1.0 (/opt/crater/workdir)
Dec 19 15:55:54.060 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.061 INFO [stderr]   --> src/main.rs:17:5
Dec 19 15:55:54.061 INFO [stderr]    |
Dec 19 15:55:54.061 INFO [stderr] 17 |     io::stdout().flush();
Dec 19 15:55:54.062 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.062 INFO [stderr]    |
Dec 19 15:55:54.062 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 15:55:54.062 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.062 INFO [stderr] 
Dec 19 15:55:54.062 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.062 INFO [stderr]   --> src/main.rs:18:5
Dec 19 15:55:54.062 INFO [stderr]    |
Dec 19 15:55:54.062 INFO [stderr] 18 |     io::stdin().read_line(&mut miner_addr);
Dec 19 15:55:54.062 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.062 INFO [stderr]    |
Dec 19 15:55:54.062 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.062 INFO [stderr] 
Dec 19 15:55:54.062 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.062 INFO [stderr]   --> src/main.rs:21:5
Dec 19 15:55:54.062 INFO [stderr]    |
Dec 19 15:55:54.062 INFO [stderr] 21 |     io::stdout().flush();
Dec 19 15:55:54.062 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.062 INFO [stderr]    |
Dec 19 15:55:54.062 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.062 INFO [stderr] 
Dec 19 15:55:54.062 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.062 INFO [stderr]   --> src/main.rs:22:5
Dec 19 15:55:54.062 INFO [stderr]    |
Dec 19 15:55:54.062 INFO [stderr] 22 |     io::stdin().read_line(&mut difficulty);
Dec 19 15:55:54.062 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.062 INFO [stderr]    |
Dec 19 15:55:54.062 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.063 INFO [stderr] 
Dec 19 15:55:54.063 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.063 INFO [stderr]   --> src/main.rs:39:9
Dec 19 15:55:54.063 INFO [stderr]    |
Dec 19 15:55:54.063 INFO [stderr] 39 |         io::stdout().flush();
Dec 19 15:55:54.063 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.063 INFO [stderr]    |
Dec 19 15:55:54.063 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.063 INFO [stderr] 
Dec 19 15:55:54.063 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.063 INFO [stderr]   --> src/main.rs:41:9
Dec 19 15:55:54.063 INFO [stderr]    |
Dec 19 15:55:54.063 INFO [stderr] 41 |         io::stdin().read_line(&mut choice);
Dec 19 15:55:54.063 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.063 INFO [stderr]    |
Dec 19 15:55:54.063 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.063 INFO [stderr] 
Dec 19 15:55:54.063 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.063 INFO [stderr]   --> src/main.rs:55:17
Dec 19 15:55:54.063 INFO [stderr]    |
Dec 19 15:55:54.063 INFO [stderr] 55 |                 io::stdout().flush();
Dec 19 15:55:54.063 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.063 INFO [stderr]    |
Dec 19 15:55:54.063 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.063 INFO [stderr] 
Dec 19 15:55:54.063 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.063 INFO [stderr]   --> src/main.rs:56:17
Dec 19 15:55:54.063 INFO [stderr]    |
Dec 19 15:55:54.063 INFO [stderr] 56 |                 io::stdin().read_line(&mut sender);
Dec 19 15:55:54.063 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.063 INFO [stderr]    |
Dec 19 15:55:54.063 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.063 INFO [stderr] 
Dec 19 15:55:54.063 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.063 INFO [stderr]   --> src/main.rs:58:17
Dec 19 15:55:54.064 INFO [stderr]    |
Dec 19 15:55:54.064 INFO [stderr] 58 |                 io::stdout().flush();
Dec 19 15:55:54.064 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.064 INFO [stderr]    |
Dec 19 15:55:54.064 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.064 INFO [stderr] 
Dec 19 15:55:54.064 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.064 INFO [stderr]   --> src/main.rs:59:17
Dec 19 15:55:54.064 INFO [stderr]    |
Dec 19 15:55:54.064 INFO [stderr] 59 |                 io::stdin().read_line(&mut receiver);
Dec 19 15:55:54.064 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.064 INFO [stderr]    |
Dec 19 15:55:54.064 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.064 INFO [stderr] 
Dec 19 15:55:54.064 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.064 INFO [stderr]   --> src/main.rs:62:17
Dec 19 15:55:54.064 INFO [stderr]    |
Dec 19 15:55:54.064 INFO [stderr] 62 |                 io::stdout().flush();
Dec 19 15:55:54.064 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.064 INFO [stderr]    |
Dec 19 15:55:54.064 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.064 INFO [stderr] 
Dec 19 15:55:54.064 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.064 INFO [stderr]   --> src/main.rs:63:17
Dec 19 15:55:54.064 INFO [stderr]    |
Dec 19 15:55:54.064 INFO [stderr] 63 |                 io::stdin().read_line(&mut amount);
Dec 19 15:55:54.064 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.064 INFO [stderr]    |
Dec 19 15:55:54.064 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.064 INFO [stderr] 
Dec 19 15:55:54.064 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.064 INFO [stderr]   --> src/main.rs:87:17
Dec 19 15:55:54.064 INFO [stderr]    |
Dec 19 15:55:54.064 INFO [stderr] 87 |                 io::stdout().flush();
Dec 19 15:55:54.064 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.064 INFO [stderr]    |
Dec 19 15:55:54.064 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.064 INFO [stderr] 
Dec 19 15:55:54.064 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.064 INFO [stderr]   --> src/main.rs:88:17
Dec 19 15:55:54.064 INFO [stderr]    |
Dec 19 15:55:54.064 INFO [stderr] 88 |                 io::stdin().read_line(&mut new_diff);
Dec 19 15:55:54.065 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.065 INFO [stderr]    |
Dec 19 15:55:54.065 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.065 INFO [stderr] 
Dec 19 15:55:54.065 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.065 INFO [stderr]   --> src/main.rs:98:17
Dec 19 15:55:54.065 INFO [stderr]    |
Dec 19 15:55:54.065 INFO [stderr] 98 |                 io::stdout().flush();
Dec 19 15:55:54.065 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.065 INFO [stderr]    |
Dec 19 15:55:54.065 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.065 INFO [stderr] 
Dec 19 15:55:54.065 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.065 INFO [stderr]   --> src/main.rs:99:17
Dec 19 15:55:54.065 INFO [stderr]    |
Dec 19 15:55:54.065 INFO [stderr] 99 |                 io::stdin().read_line(&mut new_reward);
Dec 19 15:55:54.065 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.065 INFO [stderr]    |
Dec 19 15:55:54.065 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.065 INFO [stderr] 
Dec 19 15:55:54.091 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.091 INFO [stderr]   --> src/main.rs:17:5
Dec 19 15:55:54.091 INFO [stderr]    |
Dec 19 15:55:54.091 INFO [stderr] 17 |     io::stdout().flush();
Dec 19 15:55:54.091 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.091 INFO [stderr]    |
Dec 19 15:55:54.091 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 15:55:54.091 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.091 INFO [stderr] 
Dec 19 15:55:54.091 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.091 INFO [stderr]   --> src/main.rs:18:5
Dec 19 15:55:54.091 INFO [stderr]    |
Dec 19 15:55:54.091 INFO [stderr] 18 |     io::stdin().read_line(&mut miner_addr);
Dec 19 15:55:54.091 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.092 INFO [stderr]    |
Dec 19 15:55:54.092 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.092 INFO [stderr] 
Dec 19 15:55:54.092 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.092 INFO [stderr]   --> src/main.rs:21:5
Dec 19 15:55:54.092 INFO [stderr]    |
Dec 19 15:55:54.092 INFO [stderr] 21 |     io::stdout().flush();
Dec 19 15:55:54.092 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.092 INFO [stderr]    |
Dec 19 15:55:54.092 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.092 INFO [stderr] 
Dec 19 15:55:54.092 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.092 INFO [stderr]   --> src/main.rs:22:5
Dec 19 15:55:54.092 INFO [stderr]    |
Dec 19 15:55:54.092 INFO [stderr] 22 |     io::stdin().read_line(&mut difficulty);
Dec 19 15:55:54.092 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.092 INFO [stderr]    |
Dec 19 15:55:54.092 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.092 INFO [stderr] 
Dec 19 15:55:54.092 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.092 INFO [stderr]   --> src/main.rs:39:9
Dec 19 15:55:54.092 INFO [stderr]    |
Dec 19 15:55:54.092 INFO [stderr] 39 |         io::stdout().flush();
Dec 19 15:55:54.092 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.092 INFO [stderr]    |
Dec 19 15:55:54.092 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.092 INFO [stderr] 
Dec 19 15:55:54.092 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.092 INFO [stderr]   --> src/main.rs:41:9
Dec 19 15:55:54.092 INFO [stderr]    |
Dec 19 15:55:54.092 INFO [stderr] 41 |         io::stdin().read_line(&mut choice);
Dec 19 15:55:54.092 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.092 INFO [stderr]    |
Dec 19 15:55:54.092 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.092 INFO [stderr] 
Dec 19 15:55:54.092 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.092 INFO [stderr]   --> src/main.rs:55:17
Dec 19 15:55:54.092 INFO [stderr]    |
Dec 19 15:55:54.092 INFO [stderr] 55 |                 io::stdout().flush();
Dec 19 15:55:54.092 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.092 INFO [stderr]    |
Dec 19 15:55:54.092 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.092 INFO [stderr] 
Dec 19 15:55:54.092 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.092 INFO [stderr]   --> src/main.rs:56:17
Dec 19 15:55:54.092 INFO [stderr]    |
Dec 19 15:55:54.092 INFO [stderr] 56 |                 io::stdin().read_line(&mut sender);
Dec 19 15:55:54.092 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.092 INFO [stderr]    |
Dec 19 15:55:54.092 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.092 INFO [stderr] 
Dec 19 15:55:54.092 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.092 INFO [stderr]   --> src/main.rs:58:17
Dec 19 15:55:54.092 INFO [stderr]    |
Dec 19 15:55:54.092 INFO [stderr] 58 |                 io::stdout().flush();
Dec 19 15:55:54.092 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.092 INFO [stderr]    |
Dec 19 15:55:54.092 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.092 INFO [stderr] 
Dec 19 15:55:54.092 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.092 INFO [stderr]   --> src/main.rs:59:17
Dec 19 15:55:54.092 INFO [stderr]    |
Dec 19 15:55:54.093 INFO [stderr] 59 |                 io::stdin().read_line(&mut receiver);
Dec 19 15:55:54.093 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.093 INFO [stderr]    |
Dec 19 15:55:54.093 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.093 INFO [stderr] 
Dec 19 15:55:54.093 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.093 INFO [stderr]   --> src/main.rs:62:17
Dec 19 15:55:54.093 INFO [stderr]    |
Dec 19 15:55:54.093 INFO [stderr] 62 |                 io::stdout().flush();
Dec 19 15:55:54.093 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.093 INFO [stderr]    |
Dec 19 15:55:54.093 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.093 INFO [stderr] 
Dec 19 15:55:54.093 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.093 INFO [stderr]   --> src/main.rs:63:17
Dec 19 15:55:54.093 INFO [stderr]    |
Dec 19 15:55:54.093 INFO [stderr] 63 |                 io::stdin().read_line(&mut amount);
Dec 19 15:55:54.093 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.093 INFO [stderr]    |
Dec 19 15:55:54.093 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.093 INFO [stderr] 
Dec 19 15:55:54.093 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.093 INFO [stderr]   --> src/main.rs:87:17
Dec 19 15:55:54.093 INFO [stderr]    |
Dec 19 15:55:54.093 INFO [stderr] 87 |                 io::stdout().flush();
Dec 19 15:55:54.093 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.093 INFO [stderr]    |
Dec 19 15:55:54.093 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.108 INFO [stderr] 
Dec 19 15:55:54.108 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.108 INFO [stderr]   --> src/main.rs:88:17
Dec 19 15:55:54.108 INFO [stderr]    |
Dec 19 15:55:54.108 INFO [stderr] 88 |                 io::stdin().read_line(&mut new_diff);
Dec 19 15:55:54.108 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.108 INFO [stderr]    |
Dec 19 15:55:54.108 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.108 INFO [stderr] 
Dec 19 15:55:54.109 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.109 INFO [stderr]   --> src/main.rs:98:17
Dec 19 15:55:54.109 INFO [stderr]    |
Dec 19 15:55:54.109 INFO [stderr] 98 |                 io::stdout().flush();
Dec 19 15:55:54.109 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.109 INFO [stderr]    |
Dec 19 15:55:54.109 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.109 INFO [stderr] 
Dec 19 15:55:54.109 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:55:54.109 INFO [stderr]   --> src/main.rs:99:17
Dec 19 15:55:54.109 INFO [stderr]    |
Dec 19 15:55:54.109 INFO [stderr] 99 |                 io::stdin().read_line(&mut new_reward);
Dec 19 15:55:54.109 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:55:54.109 INFO [stderr]    |
Dec 19 15:55:54.109 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:55:54.109 INFO [stderr] 
Dec 19 15:55:54.165 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.09s
Dec 19 15:55:55.622 INFO running `"docker" "inspect" "13d2e7131ff97b2a4ac34861f5e3c42a321d02ab859dcd20921f223fbe964c15"`
Dec 19 15:55:56.008 INFO running `"docker" "rm" "-f" "13d2e7131ff97b2a4ac34861f5e3c42a321d02ab859dcd20921f223fbe964c15"`
Dec 19 15:55:56.308 INFO [stdout] 13d2e7131ff97b2a4ac34861f5e3c42a321d02ab859dcd20921f223fbe964c15