[INFO] updating cached repository Niedzwiedzw/rust_blockchain
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Niedzwiedzw/rust_blockchain
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Niedzwiedzw/rust_blockchain" "work/ex/beta-1.38-1/sources/1.37.0/gh/Niedzwiedzw/rust_blockchain"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Niedzwiedzw/rust_blockchain'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Niedzwiedzw/rust_blockchain" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Niedzwiedzw/rust_blockchain"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Niedzwiedzw/rust_blockchain'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 803a90b0b6eee337b1fd8cb679a935cdaa318423
[INFO] sha for GitHub repo Niedzwiedzw/rust_blockchain: 803a90b0b6eee337b1fd8cb679a935cdaa318423
[INFO] validating manifest of Niedzwiedzw/rust_blockchain on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Niedzwiedzw/rust_blockchain on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Niedzwiedzw/rust_blockchain
[INFO] finished frobbing Niedzwiedzw/rust_blockchain
[INFO] frobbed toml for Niedzwiedzw/rust_blockchain written to work/ex/beta-1.38-1/sources/1.37.0/gh/Niedzwiedzw/rust_blockchain/Cargo.toml
[INFO] started frobbing Niedzwiedzw/rust_blockchain
[INFO] finished frobbing Niedzwiedzw/rust_blockchain
[INFO] frobbed toml for Niedzwiedzw/rust_blockchain written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Niedzwiedzw/rust_blockchain/Cargo.toml
[INFO] crate Niedzwiedzw/rust_blockchain already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Niedzwiedzw/rust_blockchain against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 5d46a239128c9731d6336e5b89f7f18e0779740d60460d51aed59ff4014d3d08
[INFO] running `"docker" "start" "-a" "5d46a239128c9731d6336e5b89f7f18e0779740d60460d51aed59ff4014d3d08"`
[INFO] [stderr]    Compiling rust-blockchain v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Sha256`
[INFO] [stderr]  --> src/blockchain.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | use sha2::{Sha256, Digest};
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `to_text`
[INFO] [stderr]  --> src/main.rs:4:36
[INFO] [stderr]   |
[INFO] [stderr] 4 | use self::blockchain::{BlockChain, to_text};
[INFO] [stderr]   |                                    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Digest`
[INFO] [stderr]  --> src/blockchain.rs:2:20
[INFO] [stderr]   |
[INFO] [stderr] 2 | use sha2::{Sha256, Digest};
[INFO] [stderr]   |                    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `BUFF_SIZE`
[INFO] [stderr]   --> src/main.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | const BUFF_SIZE: usize = DATA_SIZE + HASH_SIZE;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `BlockBuff`
[INFO] [stderr]   --> src/main.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | type BlockBuff = [u8; BUFF_SIZE];
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.30s
[INFO] running `"docker" "inspect" "5d46a239128c9731d6336e5b89f7f18e0779740d60460d51aed59ff4014d3d08"`
[INFO] running `"docker" "rm" "-f" "5d46a239128c9731d6336e5b89f7f18e0779740d60460d51aed59ff4014d3d08"`
[INFO] [stdout] 5d46a239128c9731d6336e5b89f7f18e0779740d60460d51aed59ff4014d3d08
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 163d4160e6ab497a2687608d08162118271b0ea60e93179347e4a8283d01a0b2
[INFO] running `"docker" "start" "-a" "163d4160e6ab497a2687608d08162118271b0ea60e93179347e4a8283d01a0b2"`
[INFO] [stderr]    Compiling rust-blockchain v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Sha256`
[INFO] [stderr]  --> src/blockchain.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | use sha2::{Sha256, Digest};
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `to_text`
[INFO] [stderr]  --> src/main.rs:4:36
[INFO] [stderr]   |
[INFO] [stderr] 4 | use self::blockchain::{BlockChain, to_text};
[INFO] [stderr]   |                                    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Digest`
[INFO] [stderr]  --> src/blockchain.rs:2:20
[INFO] [stderr]   |
[INFO] [stderr] 2 | use sha2::{Sha256, Digest};
[INFO] [stderr]   |                    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `BUFF_SIZE`
[INFO] [stderr]   --> src/main.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | const BUFF_SIZE: usize = DATA_SIZE + HASH_SIZE;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `BlockBuff`
[INFO] [stderr]   --> src/main.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | type BlockBuff = [u8; BUFF_SIZE];
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.95s
[INFO] running `"docker" "inspect" "163d4160e6ab497a2687608d08162118271b0ea60e93179347e4a8283d01a0b2"`
[INFO] running `"docker" "rm" "-f" "163d4160e6ab497a2687608d08162118271b0ea60e93179347e4a8283d01a0b2"`
[INFO] [stdout] 163d4160e6ab497a2687608d08162118271b0ea60e93179347e4a8283d01a0b2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 2959f626c6e90b2fe87faca1f96cd9399912ef8d59b88b2c4482d438d0e5f786
[INFO] running `"docker" "start" "-a" "2959f626c6e90b2fe87faca1f96cd9399912ef8d59b88b2c4482d438d0e5f786"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_blockchain-1d0aa90279fa2731
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test proof::test_following_zeroes ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "2959f626c6e90b2fe87faca1f96cd9399912ef8d59b88b2c4482d438d0e5f786"`
[INFO] running `"docker" "rm" "-f" "2959f626c6e90b2fe87faca1f96cd9399912ef8d59b88b2c4482d438d0e5f786"`
[INFO] [stdout] 2959f626c6e90b2fe87faca1f96cd9399912ef8d59b88b2c4482d438d0e5f786