Dec 12 01:12:00.800 INFO checking Niedzwiedzw/rust_blockchain against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 12 01:12:00.800 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-4/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-alt check --frozen --all --all-targets" "-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 12 01:12:01.185 INFO [stdout] 891b86d778cff8ee94205eb6511616c6e14b154bc08c6d554ada52b0c2e79729
Dec 12 01:12:01.187 INFO running `"docker" "start" "-a" "891b86d778cff8ee94205eb6511616c6e14b154bc08c6d554ada52b0c2e79729"`
Dec 12 01:12:03.267 INFO [stderr] usermod: no changes
Dec 12 01:12:03.348 INFO [stderr]     Checking rust-blockchain v0.1.0 (/source)
Dec 12 01:12:04.667 INFO [stderr] warning: unused import: `Sha256`
Dec 12 01:12:04.667 INFO [stderr]  --> src/blockchain.rs:2:12
Dec 12 01:12:04.667 INFO [stderr]   |
Dec 12 01:12:04.667 INFO [stderr] 2 | use sha2::{Sha256, Digest};
Dec 12 01:12:04.667 INFO [stderr]   |            ^^^^^^
Dec 12 01:12:04.667 INFO [stderr]   |
Dec 12 01:12:04.668 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 12 01:12:04.668 INFO [stderr] 
Dec 12 01:12:04.668 INFO [stderr] warning: unused import: `to_text`
Dec 12 01:12:04.668 INFO [stderr]  --> src/main.rs:4:36
Dec 12 01:12:04.668 INFO [stderr]   |
Dec 12 01:12:04.668 INFO [stderr] 4 | use self::blockchain::{BlockChain, to_text};
Dec 12 01:12:04.668 INFO [stderr]   |                                    ^^^^^^^
Dec 12 01:12:04.668 INFO [stderr] 
Dec 12 01:12:04.806 INFO [stderr] warning: unused import: `Sha256`
Dec 12 01:12:04.807 INFO [stderr]  --> src/blockchain.rs:2:12
Dec 12 01:12:04.807 INFO [stderr]   |
Dec 12 01:12:04.807 INFO [stderr] 2 | use sha2::{Sha256, Digest};
Dec 12 01:12:04.808 INFO [stderr]   |            ^^^^^^
Dec 12 01:12:04.808 INFO [stderr]   |
Dec 12 01:12:04.808 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 12 01:12:04.808 INFO [stderr] 
Dec 12 01:12:04.809 INFO [stderr] warning: unused import: `to_text`
Dec 12 01:12:04.809 INFO [stderr]  --> src/main.rs:4:36
Dec 12 01:12:04.809 INFO [stderr]   |
Dec 12 01:12:04.809 INFO [stderr] 4 | use self::blockchain::{BlockChain, to_text};
Dec 12 01:12:04.810 INFO [stderr]   |                                    ^^^^^^^
Dec 12 01:12:04.810 INFO [stderr] 
Dec 12 01:12:04.828 INFO [stderr] warning: unused import: `Digest`
Dec 12 01:12:04.828 INFO [stderr]  --> src/blockchain.rs:2:20
Dec 12 01:12:04.828 INFO [stderr]   |
Dec 12 01:12:04.828 INFO [stderr] 2 | use sha2::{Sha256, Digest};
Dec 12 01:12:04.828 INFO [stderr]   |                    ^^^^^^
Dec 12 01:12:04.828 INFO [stderr] 
Dec 12 01:12:04.874 INFO [stderr] warning: constant item is never used: `BUFF_SIZE`
Dec 12 01:12:04.874 INFO [stderr]   --> src/main.rs:10:1
Dec 12 01:12:04.874 INFO [stderr]    |
Dec 12 01:12:04.874 INFO [stderr] 10 | const BUFF_SIZE: usize = DATA_SIZE + HASH_SIZE;
Dec 12 01:12:04.874 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 01:12:04.874 INFO [stderr]    |
Dec 12 01:12:04.874 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 01:12:04.874 INFO [stderr] 
Dec 12 01:12:04.874 INFO [stderr] warning: type alias is never used: `BlockBuff`
Dec 12 01:12:04.874 INFO [stderr]   --> src/main.rs:12:1
Dec 12 01:12:04.874 INFO [stderr]    |
Dec 12 01:12:04.874 INFO [stderr] 12 | type BlockBuff = [u8; BUFF_SIZE];
Dec 12 01:12:04.874 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 01:12:04.875 INFO [stderr] 
Dec 12 01:12:04.933 INFO [stderr] warning: unused import: `Digest`
Dec 12 01:12:04.933 INFO [stderr]  --> src/blockchain.rs:2:20
Dec 12 01:12:04.934 INFO [stderr]   |
Dec 12 01:12:04.934 INFO [stderr] 2 | use sha2::{Sha256, Digest};
Dec 12 01:12:04.934 INFO [stderr]   |                    ^^^^^^
Dec 12 01:12:04.934 INFO [stderr] 
Dec 12 01:12:04.975 INFO [stderr] warning: constant item is never used: `BUFF_SIZE`
Dec 12 01:12:04.975 INFO [stderr]   --> src/main.rs:10:1
Dec 12 01:12:04.975 INFO [stderr]    |
Dec 12 01:12:04.975 INFO [stderr] 10 | const BUFF_SIZE: usize = DATA_SIZE + HASH_SIZE;
Dec 12 01:12:04.975 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 01:12:04.976 INFO [stderr]    |
Dec 12 01:12:04.976 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 01:12:04.976 INFO [stderr] 
Dec 12 01:12:04.976 INFO [stderr] warning: type alias is never used: `BlockBuff`
Dec 12 01:12:04.976 INFO [stderr]   --> src/main.rs:12:1
Dec 12 01:12:04.976 INFO [stderr]    |
Dec 12 01:12:04.976 INFO [stderr] 12 | type BlockBuff = [u8; BUFF_SIZE];
Dec 12 01:12:04.976 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 01:12:04.976 INFO [stderr] 
Dec 12 01:12:04.993 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.71s
Dec 12 01:12:04.997 INFO [stderr] su: No module specific data is present
Dec 12 01:12:05.996 INFO running `"docker" "inspect" "891b86d778cff8ee94205eb6511616c6e14b154bc08c6d554ada52b0c2e79729"`
Dec 12 01:12:06.286 INFO running `"docker" "rm" "-f" "891b86d778cff8ee94205eb6511616c6e14b154bc08c6d554ada52b0c2e79729"`
Dec 12 01:12:06.484 INFO [stdout] 891b86d778cff8ee94205eb6511616c6e14b154bc08c6d554ada52b0c2e79729