[INFO] updating cached repository uma0317/Rust-BlockChain
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/uma0317/Rust-BlockChain
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/uma0317/Rust-BlockChain" "work/ex/beta-1.37-6/sources/1.36.0/gh/uma0317/Rust-BlockChain"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/uma0317/Rust-BlockChain'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/uma0317/Rust-BlockChain" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/uma0317/Rust-BlockChain"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/uma0317/Rust-BlockChain'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d9219a60ce1795e0ffb22b7bd7429b56a2dbf6ba
[INFO] sha for GitHub repo uma0317/Rust-BlockChain: d9219a60ce1795e0ffb22b7bd7429b56a2dbf6ba
[INFO] validating manifest of uma0317/Rust-BlockChain on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of uma0317/Rust-BlockChain on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing uma0317/Rust-BlockChain
[INFO] finished frobbing uma0317/Rust-BlockChain
[INFO] frobbed toml for uma0317/Rust-BlockChain written to work/ex/beta-1.37-6/sources/1.36.0/gh/uma0317/Rust-BlockChain/Cargo.toml
[INFO] started frobbing uma0317/Rust-BlockChain
[INFO] finished frobbing uma0317/Rust-BlockChain
[INFO] frobbed toml for uma0317/Rust-BlockChain written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/uma0317/Rust-BlockChain/Cargo.toml
[INFO] crate uma0317/Rust-BlockChain already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing uma0317/Rust-BlockChain against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/uma0317/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 478dd319eec66bb82411736c51ba82f10761d684091c90e85e6419028b0bc748
[INFO] running `"docker" "start" "-a" "478dd319eec66bb82411736c51ba82f10761d684091c90e85e6419028b0bc748"`
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling blockchain v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Block`
[INFO] [stderr]  --> src/main.rs:3:30
[INFO] [stderr]   |
[INFO] [stderr] 3 | use blockchain::{Blockchain, Block, Transaction};
[INFO] [stderr]   |                              ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_chain_valid`
[INFO] [stderr]    --> src/blockchain.rs:164:5
[INFO] [stderr]     |
[INFO] [stderr] 164 |     fn is_chain_valid(&self) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.19s
[INFO] running `"docker" "inspect" "478dd319eec66bb82411736c51ba82f10761d684091c90e85e6419028b0bc748"`
[INFO] running `"docker" "rm" "-f" "478dd319eec66bb82411736c51ba82f10761d684091c90e85e6419028b0bc748"`
[INFO] [stdout] 478dd319eec66bb82411736c51ba82f10761d684091c90e85e6419028b0bc748
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/uma0317/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 5b85b7a4b1b4efd3c661754bca4d43749d3ec48f174e7665eddba09d00f724f7
[INFO] running `"docker" "start" "-a" "5b85b7a4b1b4efd3c661754bca4d43749d3ec48f174e7665eddba09d00f724f7"`
[INFO] [stderr]    Compiling blockchain v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Block`
[INFO] [stderr]  --> src/main.rs:3:30
[INFO] [stderr]   |
[INFO] [stderr] 3 | use blockchain::{Blockchain, Block, Transaction};
[INFO] [stderr]   |                              ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_chain_valid`
[INFO] [stderr]    --> src/blockchain.rs:164:5
[INFO] [stderr]     |
[INFO] [stderr] 164 |     fn is_chain_valid(&self) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `"docker" "inspect" "5b85b7a4b1b4efd3c661754bca4d43749d3ec48f174e7665eddba09d00f724f7"`
[INFO] running `"docker" "rm" "-f" "5b85b7a4b1b4efd3c661754bca4d43749d3ec48f174e7665eddba09d00f724f7"`
[INFO] [stdout] 5b85b7a4b1b4efd3c661754bca4d43749d3ec48f174e7665eddba09d00f724f7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/uma0317/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 224711ed530c70cd77c81c47454fac9de49661a8d9b8a5126b2bb9c79744c54f
[INFO] running `"docker" "start" "-a" "224711ed530c70cd77c81c47454fac9de49661a8d9b8a5126b2bb9c79744c54f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/blockchain-2418ba38e70a37b4
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "224711ed530c70cd77c81c47454fac9de49661a8d9b8a5126b2bb9c79744c54f"`
[INFO] running `"docker" "rm" "-f" "224711ed530c70cd77c81c47454fac9de49661a8d9b8a5126b2bb9c79744c54f"`
[INFO] [stdout] 224711ed530c70cd77c81c47454fac9de49661a8d9b8a5126b2bb9c79744c54f