[INFO] updating cached repository jk-gan/blockchain-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jk-gan/blockchain-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jk-gan/blockchain-rust" "work/ex/beta-1.37-6/sources/1.36.0/gh/jk-gan/blockchain-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/jk-gan/blockchain-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jk-gan/blockchain-rust" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jk-gan/blockchain-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jk-gan/blockchain-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9ae8ac66358ffabd7bfc2a42fab1b966b4a61131
[INFO] sha for GitHub repo jk-gan/blockchain-rust: 9ae8ac66358ffabd7bfc2a42fab1b966b4a61131
[INFO] validating manifest of jk-gan/blockchain-rust 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 jk-gan/blockchain-rust 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 jk-gan/blockchain-rust
[INFO] finished frobbing jk-gan/blockchain-rust
[INFO] frobbed toml for jk-gan/blockchain-rust written to work/ex/beta-1.37-6/sources/1.36.0/gh/jk-gan/blockchain-rust/Cargo.toml
[INFO] started frobbing jk-gan/blockchain-rust
[INFO] finished frobbing jk-gan/blockchain-rust
[INFO] frobbed toml for jk-gan/blockchain-rust written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jk-gan/blockchain-rust/Cargo.toml
[INFO] crate jk-gan/blockchain-rust 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing jk-gan/blockchain-rust 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-7/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/jk-gan/blockchain-rust:/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] eba7a2306763a4435b381bca3bec7e6d53260c31a656a9525d509ff7166ae46d
[INFO] running `"docker" "start" "-a" "eba7a2306763a4435b381bca3bec7e6d53260c31a656a9525d509ff7166ae46d"`
[INFO] [stderr]    Compiling num-bigint v0.2.1
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling blockchain v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: constant item is never used: `TARGER_BIT`
[INFO] [stderr]  --> src/proof_of_work.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | const TARGER_BIT: usize = 24;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ProofOfWork`
[INFO] [stderr]  --> src/proof_of_work.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | struct ProofOfWork {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/proof_of_work.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     fn new(block: Block) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.90s
[INFO] running `"docker" "inspect" "eba7a2306763a4435b381bca3bec7e6d53260c31a656a9525d509ff7166ae46d"`
[INFO] running `"docker" "rm" "-f" "eba7a2306763a4435b381bca3bec7e6d53260c31a656a9525d509ff7166ae46d"`
[INFO] [stdout] eba7a2306763a4435b381bca3bec7e6d53260c31a656a9525d509ff7166ae46d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/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/jk-gan/blockchain-rust:/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] 0a8af1a89634eaa91ec3980ce07387ba24fadd05749d1e6a2b83a892211b2ea7
[INFO] running `"docker" "start" "-a" "0a8af1a89634eaa91ec3980ce07387ba24fadd05749d1e6a2b83a892211b2ea7"`
[INFO] [stderr]    Compiling blockchain v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: constant item is never used: `TARGER_BIT`
[INFO] [stderr]  --> src/proof_of_work.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | const TARGER_BIT: usize = 24;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ProofOfWork`
[INFO] [stderr]  --> src/proof_of_work.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | struct ProofOfWork {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/proof_of_work.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     fn new(block: Block) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `"docker" "inspect" "0a8af1a89634eaa91ec3980ce07387ba24fadd05749d1e6a2b83a892211b2ea7"`
[INFO] running `"docker" "rm" "-f" "0a8af1a89634eaa91ec3980ce07387ba24fadd05749d1e6a2b83a892211b2ea7"`
[INFO] [stdout] 0a8af1a89634eaa91ec3980ce07387ba24fadd05749d1e6a2b83a892211b2ea7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/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/jk-gan/blockchain-rust:/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] c73fc6f9215db39c7e4fd9fe3299cb46b1b70a1c1d618575d6e725d31ff3ccb1
[INFO] running `"docker" "start" "-a" "c73fc6f9215db39c7e4fd9fe3299cb46b1b70a1c1d618575d6e725d31ff3ccb1"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/blockchain-1e9bd2ed002cd6a0
[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" "c73fc6f9215db39c7e4fd9fe3299cb46b1b70a1c1d618575d6e725d31ff3ccb1"`
[INFO] running `"docker" "rm" "-f" "c73fc6f9215db39c7e4fd9fe3299cb46b1b70a1c1d618575d6e725d31ff3ccb1"`
[INFO] [stdout] c73fc6f9215db39c7e4fd9fe3299cb46b1b70a1c1d618575d6e725d31ff3ccb1