Dec 13 12:48:54.563 INFO testing lezwon/Blockchain-from-Scratch against try#aa49d8ef14939ddec0e34b346b60174a5673d48f for pr-56550
Dec 13 12:48:54.563 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-2/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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 12:48:54.772 INFO [stdout] 72f77385d53ca8ee1f19d2502e213830b6444c4d44ce9cf4a335ee05f70852ba
Dec 13 12:48:54.772 INFO running `"docker" "start" "-a" "72f77385d53ca8ee1f19d2502e213830b6444c4d44ce9cf4a335ee05f70852ba"`
Dec 13 12:48:55.189 INFO [stderr] usermod: no changes
Dec 13 12:48:55.271 INFO [stderr]    Compiling blockchain-rust v0.1.0 (/source)
Dec 13 12:48:56.087 INFO [stderr] warning: variable does not need to be mutable
Dec 13 12:48:56.087 INFO [stderr]   --> src/main.rs:94:8
Dec 13 12:48:56.087 INFO [stderr]    |
Dec 13 12:48:56.087 INFO [stderr] 94 |             let mut block_header = BlockHeader{
Dec 13 12:48:56.087 INFO [stderr]    |                 ----^^^^^^^^^^^^
Dec 13 12:48:56.087 INFO [stderr]    |                 |
Dec 13 12:48:56.087 INFO [stderr]    |                 help: remove this `mut`
Dec 13 12:48:56.087 INFO [stderr]    |
Dec 13 12:48:56.087 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 13 12:48:56.087 INFO [stderr] 
Dec 13 12:48:56.099 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:48:56.099 INFO [stderr]    --> src/main.rs:210:2
Dec 13 12:48:56.099 INFO [stderr]     |
Dec 13 12:48:56.099 INFO [stderr] 210 |     io::stdout().flush();
Dec 13 12:48:56.099 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:48:56.099 INFO [stderr]     |
Dec 13 12:48:56.099 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 13 12:48:56.099 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:48:56.099 INFO [stderr] 
Dec 13 12:48:56.099 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:48:56.099 INFO [stderr]    --> src/main.rs:211:2
Dec 13 12:48:56.099 INFO [stderr]     |
Dec 13 12:48:56.099 INFO [stderr] 211 |     io::stdin().read_line(&mut miner_address);
Dec 13 12:48:56.099 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:48:56.099 INFO [stderr]     |
Dec 13 12:48:56.099 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:48:56.099 INFO [stderr] 
Dec 13 12:48:56.103 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:48:56.103 INFO [stderr]    --> src/main.rs:213:2
Dec 13 12:48:56.103 INFO [stderr]     |
Dec 13 12:48:56.103 INFO [stderr] 213 |     io::stdout().flush();
Dec 13 12:48:56.103 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:48:56.103 INFO [stderr]     |
Dec 13 12:48:56.103 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:48:56.103 INFO [stderr] 
Dec 13 12:48:56.103 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:48:56.103 INFO [stderr]    --> src/main.rs:214:2
Dec 13 12:48:56.103 INFO [stderr]     |
Dec 13 12:48:56.103 INFO [stderr] 214 |     io::stdin().read_line(&mut difficulty_string);
Dec 13 12:48:56.103 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:48:56.103 INFO [stderr]     |
Dec 13 12:48:56.103 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:48:56.103 INFO [stderr] 
Dec 13 12:48:56.103 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:48:56.103 INFO [stderr]    --> src/main.rs:229:3
Dec 13 12:48:56.103 INFO [stderr]     |
Dec 13 12:48:56.103 INFO [stderr] 229 |         io::stdout().flush();
Dec 13 12:48:56.103 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:48:56.103 INFO [stderr]     |
Dec 13 12:48:56.103 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:48:56.103 INFO [stderr] 
Dec 13 12:48:56.103 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:48:56.103 INFO [stderr]    --> src/main.rs:231:3
Dec 13 12:48:56.103 INFO [stderr]     |
Dec 13 12:48:56.103 INFO [stderr] 231 |         io::stdin().read_line(&mut choice);
Dec 13 12:48:56.103 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:48:56.103 INFO [stderr]     |
Dec 13 12:48:56.103 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:48:56.103 INFO [stderr] 
Dec 13 12:48:56.103 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:48:56.104 INFO [stderr]    --> src/main.rs:247:5
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr] 247 |                 io::stdout().flush();
Dec 13 12:48:56.104 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:48:56.104 INFO [stderr] 
Dec 13 12:48:56.104 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:48:56.104 INFO [stderr]    --> src/main.rs:248:5
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr] 248 |                 io::stdin().read_line(&mut sender);
Dec 13 12:48:56.104 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:48:56.104 INFO [stderr] 
Dec 13 12:48:56.104 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:48:56.104 INFO [stderr]    --> src/main.rs:250:5
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr] 250 |                 io::stdout().flush();
Dec 13 12:48:56.104 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:48:56.104 INFO [stderr] 
Dec 13 12:48:56.104 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:48:56.104 INFO [stderr]    --> src/main.rs:251:5
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr] 251 |                 io::stdin().read_line(&mut recipient);
Dec 13 12:48:56.104 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:48:56.104 INFO [stderr] 
Dec 13 12:48:56.104 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:48:56.104 INFO [stderr]    --> src/main.rs:253:5
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr] 253 |                 io::stdout().flush();
Dec 13 12:48:56.104 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:48:56.104 INFO [stderr] 
Dec 13 12:48:56.104 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:48:56.104 INFO [stderr]    --> src/main.rs:254:5
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr] 254 |                 io::stdin().read_line(&mut amount);
Dec 13 12:48:56.104 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:48:56.104 INFO [stderr] 
Dec 13 12:48:56.104 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:48:56.104 INFO [stderr]    --> src/main.rs:274:5
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr] 274 |                 io::stdout().flush();
Dec 13 12:48:56.104 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:48:56.104 INFO [stderr] 
Dec 13 12:48:56.104 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:48:56.104 INFO [stderr]    --> src/main.rs:275:5
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr] 275 |                 io::stdin().read_line(&mut new_difficulty);
Dec 13 12:48:56.104 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:48:56.104 INFO [stderr] 
Dec 13 12:48:56.104 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:48:56.104 INFO [stderr]    --> src/main.rs:286:5
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr] 286 |                 io::stdout().flush();
Dec 13 12:48:56.104 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:48:56.104 INFO [stderr] 
Dec 13 12:48:56.104 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:48:56.104 INFO [stderr]    --> src/main.rs:287:5
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr] 287 |                 io::stdin().read_line(&mut new_reward);
Dec 13 12:48:56.104 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:48:56.104 INFO [stderr]     |
Dec 13 12:48:56.104 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:48:56.104 INFO [stderr] 
Dec 13 12:48:56.987 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.77s
Dec 13 12:48:56.992 INFO [stderr] su: No module specific data is present
Dec 13 12:48:57.778 INFO running `"docker" "inspect" "72f77385d53ca8ee1f19d2502e213830b6444c4d44ce9cf4a335ee05f70852ba"`
Dec 13 12:48:58.011 INFO running `"docker" "rm" "-f" "72f77385d53ca8ee1f19d2502e213830b6444c4d44ce9cf4a335ee05f70852ba"`
Dec 13 12:48:58.287 INFO [stdout] 72f77385d53ca8ee1f19d2502e213830b6444c4d44ce9cf4a335ee05f70852ba
Dec 13 12:48:58.287 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-2/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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 12:48:58.655 INFO [stdout] 8162855af10d85740b43ff13fb77a4f21fd399500b354939fa2380af880c315c
Dec 13 12:48:58.663 INFO running `"docker" "start" "-a" "8162855af10d85740b43ff13fb77a4f21fd399500b354939fa2380af880c315c"`
Dec 13 12:48:59.855 INFO [stderr] usermod: no changes
Dec 13 12:48:59.956 INFO [stderr]    Compiling blockchain-rust v0.1.0 (/source)
Dec 13 12:49:00.835 INFO [stderr] warning: variable does not need to be mutable
Dec 13 12:49:00.835 INFO [stderr]   --> src/main.rs:94:8
Dec 13 12:49:00.835 INFO [stderr]    |
Dec 13 12:49:00.835 INFO [stderr] 94 |             let mut block_header = BlockHeader{
Dec 13 12:49:00.835 INFO [stderr]    |                 ----^^^^^^^^^^^^
Dec 13 12:49:00.835 INFO [stderr]    |                 |
Dec 13 12:49:00.835 INFO [stderr]    |                 help: remove this `mut`
Dec 13 12:49:00.835 INFO [stderr]    |
Dec 13 12:49:00.835 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 13 12:49:00.835 INFO [stderr] 
Dec 13 12:49:00.843 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:49:00.843 INFO [stderr]    --> src/main.rs:210:2
Dec 13 12:49:00.843 INFO [stderr]     |
Dec 13 12:49:00.843 INFO [stderr] 210 |     io::stdout().flush();
Dec 13 12:49:00.843 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:49:00.843 INFO [stderr]     |
Dec 13 12:49:00.843 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 13 12:49:00.843 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:49:00.843 INFO [stderr] 
Dec 13 12:49:00.843 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:49:00.843 INFO [stderr]    --> src/main.rs:211:2
Dec 13 12:49:00.843 INFO [stderr]     |
Dec 13 12:49:00.843 INFO [stderr] 211 |     io::stdin().read_line(&mut miner_address);
Dec 13 12:49:00.843 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:49:00.843 INFO [stderr]     |
Dec 13 12:49:00.843 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:49:00.843 INFO [stderr] 
Dec 13 12:49:00.843 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:49:00.843 INFO [stderr]    --> src/main.rs:213:2
Dec 13 12:49:00.843 INFO [stderr]     |
Dec 13 12:49:00.843 INFO [stderr] 213 |     io::stdout().flush();
Dec 13 12:49:00.844 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:49:00.844 INFO [stderr] 
Dec 13 12:49:00.844 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:49:00.844 INFO [stderr]    --> src/main.rs:214:2
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr] 214 |     io::stdin().read_line(&mut difficulty_string);
Dec 13 12:49:00.844 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:49:00.844 INFO [stderr] 
Dec 13 12:49:00.844 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:49:00.844 INFO [stderr]    --> src/main.rs:229:3
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr] 229 |         io::stdout().flush();
Dec 13 12:49:00.844 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:49:00.844 INFO [stderr] 
Dec 13 12:49:00.844 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:49:00.844 INFO [stderr]    --> src/main.rs:231:3
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr] 231 |         io::stdin().read_line(&mut choice);
Dec 13 12:49:00.844 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:49:00.844 INFO [stderr] 
Dec 13 12:49:00.844 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:49:00.844 INFO [stderr]    --> src/main.rs:247:5
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr] 247 |                 io::stdout().flush();
Dec 13 12:49:00.844 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:49:00.844 INFO [stderr] 
Dec 13 12:49:00.844 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:49:00.844 INFO [stderr]    --> src/main.rs:248:5
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr] 248 |                 io::stdin().read_line(&mut sender);
Dec 13 12:49:00.844 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:49:00.844 INFO [stderr] 
Dec 13 12:49:00.844 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:49:00.844 INFO [stderr]    --> src/main.rs:250:5
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr] 250 |                 io::stdout().flush();
Dec 13 12:49:00.844 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:49:00.844 INFO [stderr] 
Dec 13 12:49:00.844 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:49:00.844 INFO [stderr]    --> src/main.rs:251:5
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr] 251 |                 io::stdin().read_line(&mut recipient);
Dec 13 12:49:00.844 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:49:00.844 INFO [stderr] 
Dec 13 12:49:00.844 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:49:00.844 INFO [stderr]    --> src/main.rs:253:5
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr] 253 |                 io::stdout().flush();
Dec 13 12:49:00.844 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:49:00.844 INFO [stderr] 
Dec 13 12:49:00.844 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:49:00.844 INFO [stderr]    --> src/main.rs:254:5
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr] 254 |                 io::stdin().read_line(&mut amount);
Dec 13 12:49:00.844 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:49:00.844 INFO [stderr] 
Dec 13 12:49:00.844 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:49:00.844 INFO [stderr]    --> src/main.rs:274:5
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr] 274 |                 io::stdout().flush();
Dec 13 12:49:00.844 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:49:00.844 INFO [stderr] 
Dec 13 12:49:00.844 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:49:00.844 INFO [stderr]    --> src/main.rs:275:5
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr] 275 |                 io::stdin().read_line(&mut new_difficulty);
Dec 13 12:49:00.844 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:49:00.844 INFO [stderr]     |
Dec 13 12:49:00.844 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:49:00.845 INFO [stderr] 
Dec 13 12:49:00.845 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:49:00.845 INFO [stderr]    --> src/main.rs:286:5
Dec 13 12:49:00.845 INFO [stderr]     |
Dec 13 12:49:00.845 INFO [stderr] 286 |                 io::stdout().flush();
Dec 13 12:49:00.845 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:49:00.845 INFO [stderr]     |
Dec 13 12:49:00.845 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:49:00.845 INFO [stderr] 
Dec 13 12:49:00.845 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 12:49:00.845 INFO [stderr]    --> src/main.rs:287:5
Dec 13 12:49:00.845 INFO [stderr]     |
Dec 13 12:49:00.845 INFO [stderr] 287 |                 io::stdin().read_line(&mut new_reward);
Dec 13 12:49:00.845 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 12:49:00.845 INFO [stderr]     |
Dec 13 12:49:00.845 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 12:49:00.845 INFO [stderr] 
Dec 13 12:49:01.162 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.28s
Dec 13 12:49:01.163 INFO [stderr] su: No module specific data is present
Dec 13 12:49:01.995 INFO running `"docker" "inspect" "8162855af10d85740b43ff13fb77a4f21fd399500b354939fa2380af880c315c"`
Dec 13 12:49:02.233 INFO running `"docker" "rm" "-f" "8162855af10d85740b43ff13fb77a4f21fd399500b354939fa2380af880c315c"`
Dec 13 12:49:02.501 INFO [stdout] 8162855af10d85740b43ff13fb77a4f21fd399500b354939fa2380af880c315c
Dec 13 12:49:02.504 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-2/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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 12:49:02.922 INFO [stdout] 614267900b0d173d8c02d06beafc659706b5b8bfc1ee5473addac579a5f0e9dc
Dec 13 12:49:02.924 INFO running `"docker" "start" "-a" "614267900b0d173d8c02d06beafc659706b5b8bfc1ee5473addac579a5f0e9dc"`
Dec 13 12:49:04.978 INFO [stderr] usermod: no changes
Dec 13 12:49:05.135 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.12s
Dec 13 12:49:05.159 INFO [stderr]      Running /target/debug/deps/blockchain_rust-a8bcb118d3c1030c
Dec 13 12:49:05.159 INFO [stdout] 
Dec 13 12:49:05.159 INFO [stdout] running 0 tests
Dec 13 12:49:05.159 INFO [stdout] 
Dec 13 12:49:05.159 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 13 12:49:05.159 INFO [stdout] 
Dec 13 12:49:05.166 INFO [stderr] su: No module specific data is present
Dec 13 12:49:05.984 INFO running `"docker" "inspect" "614267900b0d173d8c02d06beafc659706b5b8bfc1ee5473addac579a5f0e9dc"`
Dec 13 12:49:06.357 INFO running `"docker" "rm" "-f" "614267900b0d173d8c02d06beafc659706b5b8bfc1ee5473addac579a5f0e9dc"`
Dec 13 12:49:06.591 INFO [stdout] 614267900b0d173d8c02d06beafc659706b5b8bfc1ee5473addac579a5f0e9dc