Dec 19 19:18:34.743 INFO checking carlosgj94/simple_blockchain against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 19:18:34.743 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 19:18:35.245 INFO [stdout] 6e859f912fb24a3ccc25b645d00f47b2c4a6dd503a79c7569fc46504317492d2
Dec 19 19:18:35.252 INFO running `"docker" "start" "-a" "6e859f912fb24a3ccc25b645d00f47b2c4a6dd503a79c7569fc46504317492d2"`
Dec 19 19:18:37.055 INFO [stderr]    Compiling rust-crypto v0.2.36
Dec 19 19:18:42.781 INFO [stderr]     Checking simple_blockchain v0.1.0 (/opt/crater/workdir)
Dec 19 19:18:43.354 INFO [stderr] warning: value assigned to `hash` is never read
Dec 19 19:18:43.354 INFO [stderr]   --> src/main.rs:73:13
Dec 19 19:18:43.354 INFO [stderr]    |
Dec 19 19:18:43.354 INFO [stderr] 73 |     let mut hash = String::new();
Dec 19 19:18:43.354 INFO [stderr]    |             ^^^^
Dec 19 19:18:43.354 INFO [stderr]    |
Dec 19 19:18:43.354 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 19 19:18:43.354 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 19:18:43.354 INFO [stderr] 
Dec 19 19:18:43.404 INFO [stderr] warning: function is never used: `is_valid_new_block`
Dec 19 19:18:43.404 INFO [stderr]    --> src/main.rs:104:1
Dec 19 19:18:43.404 INFO [stderr]     |
Dec 19 19:18:43.404 INFO [stderr] 104 | fn is_valid_new_block(n_block: Block, p_block: Block) -> bool {
Dec 19 19:18:43.404 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:18:43.404 INFO [stderr]     |
Dec 19 19:18:43.404 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 19 19:18:43.404 INFO [stderr] 
Dec 19 19:18:43.424 INFO [stderr] warning: value assigned to `hash` is never read
Dec 19 19:18:43.424 INFO [stderr]   --> src/main.rs:73:13
Dec 19 19:18:43.425 INFO [stderr]    |
Dec 19 19:18:43.425 INFO [stderr] 73 |     let mut hash = String::new();
Dec 19 19:18:43.425 INFO [stderr]    |             ^^^^
Dec 19 19:18:43.425 INFO [stderr]    |
Dec 19 19:18:43.425 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 19 19:18:43.425 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 19:18:43.425 INFO [stderr] 
Dec 19 19:18:43.459 INFO [stderr] warning: function is never used: `is_valid_new_block`
Dec 19 19:18:43.459 INFO [stderr]    --> src/main.rs:104:1
Dec 19 19:18:43.459 INFO [stderr]     |
Dec 19 19:18:43.459 INFO [stderr] 104 | fn is_valid_new_block(n_block: Block, p_block: Block) -> bool {
Dec 19 19:18:43.459 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:18:43.459 INFO [stderr]     |
Dec 19 19:18:43.459 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 19 19:18:43.459 INFO [stderr] 
Dec 19 19:18:43.496 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.49s
Dec 19 19:18:43.916 INFO running `"docker" "inspect" "6e859f912fb24a3ccc25b645d00f47b2c4a6dd503a79c7569fc46504317492d2"`
Dec 19 19:18:44.055 INFO running `"docker" "rm" "-f" "6e859f912fb24a3ccc25b645d00f47b2c4a6dd503a79c7569fc46504317492d2"`
Dec 19 19:18:44.186 INFO [stdout] 6e859f912fb24a3ccc25b645d00f47b2c4a6dd503a79c7569fc46504317492d2