Dec 18 06:13:45.141 INFO checking Niedzwiedzw/rust_blockchain against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 06:13:45.141 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-1/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/Niedzwiedzw/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 06:13:45.620 INFO [stdout] f15b956d655ebade5cdc6d37860479555b96571f8a52cb249a54ab9836f3b736
Dec 18 06:13:45.622 INFO running `"docker" "start" "-a" "f15b956d655ebade5cdc6d37860479555b96571f8a52cb249a54ab9836f3b736"`
Dec 18 06:13:47.854 INFO [stderr]     Checking block-buffer v0.7.0
Dec 18 06:13:48.301 INFO [stderr]     Checking sha2 v0.8.0
Dec 18 06:13:48.995 INFO [stderr]     Checking rust-blockchain v0.1.0 (/opt/crater/workdir)
Dec 18 06:13:49.572 INFO [stderr] warning: unused import: `Sha256`
Dec 18 06:13:49.573 INFO [stderr]  --> src/blockchain.rs:2:12
Dec 18 06:13:49.573 INFO [stderr]   |
Dec 18 06:13:49.573 INFO [stderr] 2 | use sha2::{Sha256, Digest};
Dec 18 06:13:49.574 INFO [stderr]   |            ^^^^^^
Dec 18 06:13:49.584 INFO [stderr]   |
Dec 18 06:13:49.585 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 06:13:49.585 INFO [stderr] 
Dec 18 06:13:49.586 INFO [stderr] warning: unused import: `to_text`
Dec 18 06:13:49.586 INFO [stderr]  --> src/main.rs:4:36
Dec 18 06:13:49.586 INFO [stderr]   |
Dec 18 06:13:49.587 INFO [stderr] 4 | use self::blockchain::{BlockChain, to_text};
Dec 18 06:13:49.587 INFO [stderr]   |                                    ^^^^^^^
Dec 18 06:13:49.587 INFO [stderr] 
Dec 18 06:13:49.770 INFO [stderr] warning: unused import: `Sha256`
Dec 18 06:13:49.770 INFO [stderr]  --> src/blockchain.rs:2:12
Dec 18 06:13:49.771 INFO [stderr]   |
Dec 18 06:13:49.771 INFO [stderr] 2 | use sha2::{Sha256, Digest};
Dec 18 06:13:49.771 INFO [stderr]   |            ^^^^^^
Dec 18 06:13:49.771 INFO [stderr]   |
Dec 18 06:13:49.772 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 06:13:49.772 INFO [stderr] 
Dec 18 06:13:49.772 INFO [stderr] warning: unused import: `to_text`
Dec 18 06:13:49.772 INFO [stderr]  --> src/main.rs:4:36
Dec 18 06:13:49.773 INFO [stderr]   |
Dec 18 06:13:49.773 INFO [stderr] 4 | use self::blockchain::{BlockChain, to_text};
Dec 18 06:13:49.773 INFO [stderr]   |                                    ^^^^^^^
Dec 18 06:13:49.773 INFO [stderr] 
Dec 18 06:13:49.808 INFO [stderr] warning: unused import: `Digest`
Dec 18 06:13:49.809 INFO [stderr]  --> src/blockchain.rs:2:20
Dec 18 06:13:49.809 INFO [stderr]   |
Dec 18 06:13:49.809 INFO [stderr] 2 | use sha2::{Sha256, Digest};
Dec 18 06:13:49.810 INFO [stderr]   |                    ^^^^^^
Dec 18 06:13:49.810 INFO [stderr] 
Dec 18 06:13:49.880 INFO [stderr] warning: constant item is never used: `BUFF_SIZE`
Dec 18 06:13:49.881 INFO [stderr]   --> src/main.rs:10:1
Dec 18 06:13:49.881 INFO [stderr]    |
Dec 18 06:13:49.881 INFO [stderr] 10 | const BUFF_SIZE: usize = DATA_SIZE + HASH_SIZE;
Dec 18 06:13:49.881 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 06:13:49.882 INFO [stderr]    |
Dec 18 06:13:49.882 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 06:13:49.882 INFO [stderr] 
Dec 18 06:13:49.882 INFO [stderr] warning: type alias is never used: `BlockBuff`
Dec 18 06:13:49.882 INFO [stderr]   --> src/main.rs:12:1
Dec 18 06:13:49.882 INFO [stderr]    |
Dec 18 06:13:49.882 INFO [stderr] 12 | type BlockBuff = [u8; BUFF_SIZE];
Dec 18 06:13:49.882 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 06:13:49.882 INFO [stderr] 
Dec 18 06:13:49.953 INFO [stderr] warning: unused import: `Digest`
Dec 18 06:13:49.954 INFO [stderr]  --> src/blockchain.rs:2:20
Dec 18 06:13:49.954 INFO [stderr]   |
Dec 18 06:13:49.954 INFO [stderr] 2 | use sha2::{Sha256, Digest};
Dec 18 06:13:49.954 INFO [stderr]   |                    ^^^^^^
Dec 18 06:13:49.954 INFO [stderr] 
Dec 18 06:13:49.999 INFO [stderr] warning: constant item is never used: `BUFF_SIZE`
Dec 18 06:13:49.999 INFO [stderr]   --> src/main.rs:10:1
Dec 18 06:13:49.999 INFO [stderr]    |
Dec 18 06:13:50.000 INFO [stderr] 10 | const BUFF_SIZE: usize = DATA_SIZE + HASH_SIZE;
Dec 18 06:13:50.000 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 06:13:50.000 INFO [stderr]    |
Dec 18 06:13:50.001 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 06:13:50.001 INFO [stderr] 
Dec 18 06:13:50.001 INFO [stderr] warning: type alias is never used: `BlockBuff`
Dec 18 06:13:50.001 INFO [stderr]   --> src/main.rs:12:1
Dec 18 06:13:50.002 INFO [stderr]    |
Dec 18 06:13:50.002 INFO [stderr] 12 | type BlockBuff = [u8; BUFF_SIZE];
Dec 18 06:13:50.002 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 06:13:50.002 INFO [stderr] 
Dec 18 06:13:50.046 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.28s
Dec 18 06:13:51.678 INFO running `"docker" "inspect" "f15b956d655ebade5cdc6d37860479555b96571f8a52cb249a54ab9836f3b736"`
Dec 18 06:13:51.982 INFO running `"docker" "rm" "-f" "f15b956d655ebade5cdc6d37860479555b96571f8a52cb249a54ab9836f3b736"`
Dec 18 06:13:52.115 INFO [stdout] f15b956d655ebade5cdc6d37860479555b96571f8a52cb249a54ab9836f3b736