Dec 05 16:33:09.586 INFO testing lezwon/Blockchain-from-Scratch against try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468 for pr-56514
Dec 05 16:33:09.586 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-7/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/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 05 16:33:09.964 INFO [stdout] b217b1d080f02fa7f066f71b6a092ca2da594f84023a0541acd9aaa09382f4fd
Dec 05 16:33:09.964 INFO running `"docker" "start" "-a" "b217b1d080f02fa7f066f71b6a092ca2da594f84023a0541acd9aaa09382f4fd"`
Dec 05 16:33:10.455 INFO [stderr] usermod: no changes
Dec 05 16:33:10.549 INFO [stderr]    Compiling serde_json v1.0.6
Dec 05 16:33:10.549 INFO [stderr]    Compiling generic-array v0.9.0
Dec 05 16:33:10.992 INFO [stderr]    Compiling digest v0.7.2
Dec 05 16:33:11.166 INFO [stderr]    Compiling sha2 v0.7.0
Dec 05 16:33:14.500 INFO [stderr]    Compiling blockchain-rust v0.1.0 (/source)
Dec 05 16:33:15.308 INFO [stderr] warning: variable does not need to be mutable
Dec 05 16:33:15.308 INFO [stderr]   --> src/main.rs:94:8
Dec 05 16:33:15.308 INFO [stderr]    |
Dec 05 16:33:15.308 INFO [stderr] 94 |             let mut block_header = BlockHeader{
Dec 05 16:33:15.308 INFO [stderr]    |                 ----^^^^^^^^^^^^
Dec 05 16:33:15.308 INFO [stderr]    |                 |
Dec 05 16:33:15.308 INFO [stderr]    |                 help: remove this `mut`
Dec 05 16:33:15.308 INFO [stderr]    |
Dec 05 16:33:15.308 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 16:33:15.308 INFO [stderr] 
Dec 05 16:33:15.325 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:15.325 INFO [stderr]    --> src/main.rs:210:2
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.325 INFO [stderr] 210 |     io::stdout().flush();
Dec 05 16:33:15.325 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.325 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 05 16:33:15.325 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:15.325 INFO [stderr] 
Dec 05 16:33:15.325 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:15.325 INFO [stderr]    --> src/main.rs:211:2
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.325 INFO [stderr] 211 |     io::stdin().read_line(&mut miner_address);
Dec 05 16:33:15.325 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.325 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:15.325 INFO [stderr] 
Dec 05 16:33:15.325 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:15.325 INFO [stderr]    --> src/main.rs:213:2
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.325 INFO [stderr] 213 |     io::stdout().flush();
Dec 05 16:33:15.325 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.325 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:15.325 INFO [stderr] 
Dec 05 16:33:15.325 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:15.325 INFO [stderr]    --> src/main.rs:214:2
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.325 INFO [stderr] 214 |     io::stdin().read_line(&mut difficulty_string);
Dec 05 16:33:15.325 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.325 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:15.325 INFO [stderr] 
Dec 05 16:33:15.325 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:15.325 INFO [stderr]    --> src/main.rs:229:3
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.325 INFO [stderr] 229 |         io::stdout().flush();
Dec 05 16:33:15.325 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.325 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:15.325 INFO [stderr] 
Dec 05 16:33:15.325 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:15.325 INFO [stderr]    --> src/main.rs:231:3
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.325 INFO [stderr] 231 |         io::stdin().read_line(&mut choice);
Dec 05 16:33:15.325 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.325 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:15.325 INFO [stderr] 
Dec 05 16:33:15.325 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:15.325 INFO [stderr]    --> src/main.rs:247:5
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.325 INFO [stderr] 247 |                 io::stdout().flush();
Dec 05 16:33:15.325 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.325 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:15.325 INFO [stderr] 
Dec 05 16:33:15.325 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:15.325 INFO [stderr]    --> src/main.rs:248:5
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.325 INFO [stderr] 248 |                 io::stdin().read_line(&mut sender);
Dec 05 16:33:15.325 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.325 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:15.325 INFO [stderr] 
Dec 05 16:33:15.325 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:15.325 INFO [stderr]    --> src/main.rs:250:5
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.325 INFO [stderr] 250 |                 io::stdout().flush();
Dec 05 16:33:15.325 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.325 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:15.325 INFO [stderr] 
Dec 05 16:33:15.325 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:15.325 INFO [stderr]    --> src/main.rs:251:5
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.325 INFO [stderr] 251 |                 io::stdin().read_line(&mut recipient);
Dec 05 16:33:15.325 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:15.325 INFO [stderr]     |
Dec 05 16:33:15.326 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:15.326 INFO [stderr] 
Dec 05 16:33:15.326 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:15.326 INFO [stderr]    --> src/main.rs:253:5
Dec 05 16:33:15.326 INFO [stderr]     |
Dec 05 16:33:15.326 INFO [stderr] 253 |                 io::stdout().flush();
Dec 05 16:33:15.326 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:15.326 INFO [stderr]     |
Dec 05 16:33:15.326 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:15.326 INFO [stderr] 
Dec 05 16:33:15.326 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:15.326 INFO [stderr]    --> src/main.rs:254:5
Dec 05 16:33:15.326 INFO [stderr]     |
Dec 05 16:33:15.326 INFO [stderr] 254 |                 io::stdin().read_line(&mut amount);
Dec 05 16:33:15.326 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:15.326 INFO [stderr]     |
Dec 05 16:33:15.326 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:15.326 INFO [stderr] 
Dec 05 16:33:15.326 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:15.326 INFO [stderr]    --> src/main.rs:274:5
Dec 05 16:33:15.326 INFO [stderr]     |
Dec 05 16:33:15.326 INFO [stderr] 274 |                 io::stdout().flush();
Dec 05 16:33:15.326 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:15.326 INFO [stderr]     |
Dec 05 16:33:15.326 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:15.326 INFO [stderr] 
Dec 05 16:33:15.326 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:15.326 INFO [stderr]    --> src/main.rs:275:5
Dec 05 16:33:15.326 INFO [stderr]     |
Dec 05 16:33:15.326 INFO [stderr] 275 |                 io::stdin().read_line(&mut new_difficulty);
Dec 05 16:33:15.326 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:15.326 INFO [stderr]     |
Dec 05 16:33:15.326 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:15.326 INFO [stderr] 
Dec 05 16:33:15.326 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:15.326 INFO [stderr]    --> src/main.rs:286:5
Dec 05 16:33:15.326 INFO [stderr]     |
Dec 05 16:33:15.326 INFO [stderr] 286 |                 io::stdout().flush();
Dec 05 16:33:15.326 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:15.326 INFO [stderr]     |
Dec 05 16:33:15.326 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:15.326 INFO [stderr] 
Dec 05 16:33:15.326 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:15.326 INFO [stderr]    --> src/main.rs:287:5
Dec 05 16:33:15.326 INFO [stderr]     |
Dec 05 16:33:15.326 INFO [stderr] 287 |                 io::stdin().read_line(&mut new_reward);
Dec 05 16:33:15.326 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:15.326 INFO [stderr]     |
Dec 05 16:33:15.326 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:15.326 INFO [stderr] 
Dec 05 16:33:16.658 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.18s
Dec 05 16:33:16.668 INFO [stderr] su: No module specific data is present
Dec 05 16:33:17.667 INFO running `"docker" "inspect" "b217b1d080f02fa7f066f71b6a092ca2da594f84023a0541acd9aaa09382f4fd"`
Dec 05 16:33:17.914 INFO running `"docker" "rm" "-f" "b217b1d080f02fa7f066f71b6a092ca2da594f84023a0541acd9aaa09382f4fd"`
Dec 05 16:33:18.269 INFO [stdout] b217b1d080f02fa7f066f71b6a092ca2da594f84023a0541acd9aaa09382f4fd
Dec 05 16:33:18.276 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-7/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/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 05 16:33:18.739 INFO [stdout] 882bd1f4f57bd2384f6f7d40940d78ba0e59e436f82e806494ede4b23996410a
Dec 05 16:33:18.744 INFO running `"docker" "start" "-a" "882bd1f4f57bd2384f6f7d40940d78ba0e59e436f82e806494ede4b23996410a"`
Dec 05 16:33:20.032 INFO [stderr] usermod: no changes
Dec 05 16:33:20.220 INFO [stderr]    Compiling blockchain-rust v0.1.0 (/source)
Dec 05 16:33:21.123 INFO [stderr] warning: variable does not need to be mutable
Dec 05 16:33:21.123 INFO [stderr]   --> src/main.rs:94:8
Dec 05 16:33:21.123 INFO [stderr]    |
Dec 05 16:33:21.123 INFO [stderr] 94 |             let mut block_header = BlockHeader{
Dec 05 16:33:21.123 INFO [stderr]    |                 ----^^^^^^^^^^^^
Dec 05 16:33:21.123 INFO [stderr]    |                 |
Dec 05 16:33:21.123 INFO [stderr]    |                 help: remove this `mut`
Dec 05 16:33:21.123 INFO [stderr]    |
Dec 05 16:33:21.123 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 16:33:21.123 INFO [stderr] 
Dec 05 16:33:21.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:21.153 INFO [stderr]    --> src/main.rs:210:2
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr] 210 |     io::stdout().flush();
Dec 05 16:33:21.153 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 05 16:33:21.153 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:21.153 INFO [stderr] 
Dec 05 16:33:21.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:21.153 INFO [stderr]    --> src/main.rs:211:2
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr] 211 |     io::stdin().read_line(&mut miner_address);
Dec 05 16:33:21.153 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:21.153 INFO [stderr] 
Dec 05 16:33:21.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:21.153 INFO [stderr]    --> src/main.rs:213:2
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr] 213 |     io::stdout().flush();
Dec 05 16:33:21.153 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:21.153 INFO [stderr] 
Dec 05 16:33:21.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:21.153 INFO [stderr]    --> src/main.rs:214:2
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr] 214 |     io::stdin().read_line(&mut difficulty_string);
Dec 05 16:33:21.153 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:21.153 INFO [stderr] 
Dec 05 16:33:21.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:21.153 INFO [stderr]    --> src/main.rs:229:3
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr] 229 |         io::stdout().flush();
Dec 05 16:33:21.153 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:21.153 INFO [stderr] 
Dec 05 16:33:21.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:21.153 INFO [stderr]    --> src/main.rs:231:3
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr] 231 |         io::stdin().read_line(&mut choice);
Dec 05 16:33:21.153 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:21.153 INFO [stderr] 
Dec 05 16:33:21.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:21.153 INFO [stderr]    --> src/main.rs:247:5
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr] 247 |                 io::stdout().flush();
Dec 05 16:33:21.153 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:21.153 INFO [stderr] 
Dec 05 16:33:21.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:21.153 INFO [stderr]    --> src/main.rs:248:5
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr] 248 |                 io::stdin().read_line(&mut sender);
Dec 05 16:33:21.153 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:21.153 INFO [stderr] 
Dec 05 16:33:21.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:21.153 INFO [stderr]    --> src/main.rs:250:5
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr] 250 |                 io::stdout().flush();
Dec 05 16:33:21.153 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:21.153 INFO [stderr] 
Dec 05 16:33:21.153 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:21.153 INFO [stderr]    --> src/main.rs:251:5
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr] 251 |                 io::stdin().read_line(&mut recipient);
Dec 05 16:33:21.153 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:21.153 INFO [stderr]     |
Dec 05 16:33:21.153 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:21.154 INFO [stderr] 
Dec 05 16:33:21.154 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:21.154 INFO [stderr]    --> src/main.rs:253:5
Dec 05 16:33:21.154 INFO [stderr]     |
Dec 05 16:33:21.154 INFO [stderr] 253 |                 io::stdout().flush();
Dec 05 16:33:21.154 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:21.154 INFO [stderr]     |
Dec 05 16:33:21.154 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:21.154 INFO [stderr] 
Dec 05 16:33:21.154 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:21.154 INFO [stderr]    --> src/main.rs:254:5
Dec 05 16:33:21.154 INFO [stderr]     |
Dec 05 16:33:21.154 INFO [stderr] 254 |                 io::stdin().read_line(&mut amount);
Dec 05 16:33:21.154 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:21.154 INFO [stderr]     |
Dec 05 16:33:21.154 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:21.154 INFO [stderr] 
Dec 05 16:33:21.154 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:21.154 INFO [stderr]    --> src/main.rs:274:5
Dec 05 16:33:21.154 INFO [stderr]     |
Dec 05 16:33:21.154 INFO [stderr] 274 |                 io::stdout().flush();
Dec 05 16:33:21.154 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:21.154 INFO [stderr]     |
Dec 05 16:33:21.154 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:21.154 INFO [stderr] 
Dec 05 16:33:21.154 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:21.154 INFO [stderr]    --> src/main.rs:275:5
Dec 05 16:33:21.154 INFO [stderr]     |
Dec 05 16:33:21.154 INFO [stderr] 275 |                 io::stdin().read_line(&mut new_difficulty);
Dec 05 16:33:21.154 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:21.154 INFO [stderr]     |
Dec 05 16:33:21.154 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:21.154 INFO [stderr] 
Dec 05 16:33:21.154 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:21.154 INFO [stderr]    --> src/main.rs:286:5
Dec 05 16:33:21.154 INFO [stderr]     |
Dec 05 16:33:21.154 INFO [stderr] 286 |                 io::stdout().flush();
Dec 05 16:33:21.154 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:21.154 INFO [stderr]     |
Dec 05 16:33:21.154 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:21.154 INFO [stderr] 
Dec 05 16:33:21.154 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 16:33:21.154 INFO [stderr]    --> src/main.rs:287:5
Dec 05 16:33:21.154 INFO [stderr]     |
Dec 05 16:33:21.154 INFO [stderr] 287 |                 io::stdin().read_line(&mut new_reward);
Dec 05 16:33:21.154 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 16:33:21.154 INFO [stderr]     |
Dec 05 16:33:21.154 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 16:33:21.154 INFO [stderr] 
Dec 05 16:33:21.470 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.41s
Dec 05 16:33:21.477 INFO [stderr] su: No module specific data is present
Dec 05 16:33:22.012 INFO running `"docker" "inspect" "882bd1f4f57bd2384f6f7d40940d78ba0e59e436f82e806494ede4b23996410a"`
Dec 05 16:33:22.406 INFO running `"docker" "rm" "-f" "882bd1f4f57bd2384f6f7d40940d78ba0e59e436f82e806494ede4b23996410a"`
Dec 05 16:33:22.899 INFO [stdout] 882bd1f4f57bd2384f6f7d40940d78ba0e59e436f82e806494ede4b23996410a
Dec 05 16:33:22.904 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-7/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/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 05 16:33:23.294 INFO [stdout] b3d23dc4075bf793e453a76cef9158160145a99e9033e3e02dc6b2ba6601dad1
Dec 05 16:33:23.298 INFO running `"docker" "start" "-a" "b3d23dc4075bf793e453a76cef9158160145a99e9033e3e02dc6b2ba6601dad1"`
Dec 05 16:33:24.424 INFO [stderr] usermod: no changes
Dec 05 16:33:24.528 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
Dec 05 16:33:24.540 INFO [stderr]      Running /target/debug/deps/blockchain_rust-a39e90f2bc249b6c
Dec 05 16:33:24.544 INFO [stdout] 
Dec 05 16:33:24.544 INFO [stdout] running 0 tests
Dec 05 16:33:24.544 INFO [stdout] 
Dec 05 16:33:24.544 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 05 16:33:24.544 INFO [stdout] 
Dec 05 16:33:24.548 INFO [stderr] su: No module specific data is present
Dec 05 16:33:25.270 INFO running `"docker" "inspect" "b3d23dc4075bf793e453a76cef9158160145a99e9033e3e02dc6b2ba6601dad1"`
Dec 05 16:33:25.469 INFO running `"docker" "rm" "-f" "b3d23dc4075bf793e453a76cef9158160145a99e9033e3e02dc6b2ba6601dad1"`
Dec 05 16:33:25.654 INFO [stdout] b3d23dc4075bf793e453a76cef9158160145a99e9033e3e02dc6b2ba6601dad1