Dec 18 02:43:35.241 INFO checking carlosgj94/simple_blockchain against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 02:43:35.241 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-2/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/carlosgj94/simple_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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 02:43:35.661 INFO [stdout] 5b4c6e931e092413436c94541aab82d149df50b65183fef8053e5da4b5ccf0f7
Dec 18 02:43:35.663 INFO running `"docker" "start" "-a" "5b4c6e931e092413436c94541aab82d149df50b65183fef8053e5da4b5ccf0f7"`
Dec 18 02:43:37.924 INFO [stderr]    Compiling rust-crypto v0.2.36
Dec 18 02:43:43.827 INFO [stderr]     Checking simple_blockchain v0.1.0 (/opt/crater/workdir)
Dec 18 02:43:44.064 INFO [stderr] warning: value assigned to `hash` is never read
Dec 18 02:43:44.064 INFO [stderr]   --> src/main.rs:73:13
Dec 18 02:43:44.064 INFO [stderr]    |
Dec 18 02:43:44.064 INFO [stderr] 73 |     let mut hash = String::new();
Dec 18 02:43:44.064 INFO [stderr]    |             ^^^^
Dec 18 02:43:44.064 INFO [stderr]    |
Dec 18 02:43:44.064 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 18 02:43:44.064 INFO [stderr] 
Dec 18 02:43:44.068 INFO [stderr] warning: function is never used: `is_valid_new_block`
Dec 18 02:43:44.068 INFO [stderr]    --> src/main.rs:104:1
Dec 18 02:43:44.068 INFO [stderr]     |
Dec 18 02:43:44.068 INFO [stderr] 104 | fn is_valid_new_block(n_block: Block, p_block: Block) -> bool {
Dec 18 02:43:44.068 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:43:44.068 INFO [stderr]     |
Dec 18 02:43:44.068 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 18 02:43:44.068 INFO [stderr] 
Dec 18 02:43:44.084 INFO [stderr] warning: value assigned to `hash` is never read
Dec 18 02:43:44.084 INFO [stderr]   --> src/main.rs:73:13
Dec 18 02:43:44.084 INFO [stderr]    |
Dec 18 02:43:44.084 INFO [stderr] 73 |     let mut hash = String::new();
Dec 18 02:43:44.084 INFO [stderr]    |             ^^^^
Dec 18 02:43:44.084 INFO [stderr]    |
Dec 18 02:43:44.084 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 18 02:43:44.084 INFO [stderr] 
Dec 18 02:43:44.104 INFO [stderr] warning: function is never used: `is_valid_new_block`
Dec 18 02:43:44.104 INFO [stderr]    --> src/main.rs:104:1
Dec 18 02:43:44.104 INFO [stderr]     |
Dec 18 02:43:44.104 INFO [stderr] 104 | fn is_valid_new_block(n_block: Block, p_block: Block) -> bool {
Dec 18 02:43:44.104 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:43:44.104 INFO [stderr]     |
Dec 18 02:43:44.104 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 18 02:43:44.104 INFO [stderr] 
Dec 18 02:43:44.120 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.26s
Dec 18 02:43:44.498 INFO running `"docker" "inspect" "5b4c6e931e092413436c94541aab82d149df50b65183fef8053e5da4b5ccf0f7"`
Dec 18 02:43:44.574 INFO running `"docker" "rm" "-f" "5b4c6e931e092413436c94541aab82d149df50b65183fef8053e5da4b5ccf0f7"`
Dec 18 02:43:44.808 INFO [stdout] 5b4c6e931e092413436c94541aab82d149df50b65183fef8053e5da4b5ccf0f7