[INFO] updating cached repository carlosgj94/simple_blockchain
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/carlosgj94/simple_blockchain
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/carlosgj94/simple_blockchain" "work/ex/beta-1.37-6/sources/1.36.0/gh/carlosgj94/simple_blockchain"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/carlosgj94/simple_blockchain'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/carlosgj94/simple_blockchain" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/carlosgj94/simple_blockchain"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/carlosgj94/simple_blockchain'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5f1c49970e56d09ea6fd8e84a1294cb183c7ccbd
[INFO] sha for GitHub repo carlosgj94/simple_blockchain: 5f1c49970e56d09ea6fd8e84a1294cb183c7ccbd
[INFO] validating manifest of carlosgj94/simple_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 carlosgj94/simple_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 carlosgj94/simple_blockchain
[INFO] finished frobbing carlosgj94/simple_blockchain
[INFO] frobbed toml for carlosgj94/simple_blockchain written to work/ex/beta-1.37-6/sources/1.36.0/gh/carlosgj94/simple_blockchain/Cargo.toml
[INFO] started frobbing carlosgj94/simple_blockchain
[INFO] finished frobbing carlosgj94/simple_blockchain
[INFO] frobbed toml for carlosgj94/simple_blockchain written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/carlosgj94/simple_blockchain/Cargo.toml
[INFO] crate carlosgj94/simple_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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing carlosgj94/simple_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-3/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/carlosgj94/simple_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] 0214c747cee2792aa46096264adec698fe03627be5de46266ca05b6974ca5534
[INFO] running `"docker" "start" "-a" "0214c747cee2792aa46096264adec698fe03627be5de46266ca05b6974ca5534"`
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling simple_blockchain v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `hash` is never read
[INFO] [stderr]   --> src/main.rs:73:13
[INFO] [stderr]    |
[INFO] [stderr] 73 |     let mut hash = String::new();
[INFO] [stderr]    |             ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_valid_new_block`
[INFO] [stderr]    --> src/main.rs:104:1
[INFO] [stderr]     |
[INFO] [stderr] 104 | fn is_valid_new_block(n_block: Block, p_block: Block) -> 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 9.32s
[INFO] running `"docker" "inspect" "0214c747cee2792aa46096264adec698fe03627be5de46266ca05b6974ca5534"`
[INFO] running `"docker" "rm" "-f" "0214c747cee2792aa46096264adec698fe03627be5de46266ca05b6974ca5534"`
[INFO] [stdout] 0214c747cee2792aa46096264adec698fe03627be5de46266ca05b6974ca5534
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/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/carlosgj94/simple_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] 6f4d9f256b8bb817e1170b15d2d4b137592df58070de99de57724da4f6d334ad
[INFO] running `"docker" "start" "-a" "6f4d9f256b8bb817e1170b15d2d4b137592df58070de99de57724da4f6d334ad"`
[INFO] [stderr]    Compiling simple_blockchain v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `hash` is never read
[INFO] [stderr]   --> src/main.rs:73:13
[INFO] [stderr]    |
[INFO] [stderr] 73 |     let mut hash = String::new();
[INFO] [stderr]    |             ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_valid_new_block`
[INFO] [stderr]    --> src/main.rs:104:1
[INFO] [stderr]     |
[INFO] [stderr] 104 | fn is_valid_new_block(n_block: Block, p_block: Block) -> 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 0.84s
[INFO] running `"docker" "inspect" "6f4d9f256b8bb817e1170b15d2d4b137592df58070de99de57724da4f6d334ad"`
[INFO] running `"docker" "rm" "-f" "6f4d9f256b8bb817e1170b15d2d4b137592df58070de99de57724da4f6d334ad"`
[INFO] [stdout] 6f4d9f256b8bb817e1170b15d2d4b137592df58070de99de57724da4f6d334ad
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/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/carlosgj94/simple_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] 21c3e547ce82ef85f21f6b0896ea4aecfac86669d0a1d19313f6afd6362b6ca6
[INFO] running `"docker" "start" "-a" "21c3e547ce82ef85f21f6b0896ea4aecfac86669d0a1d19313f6afd6362b6ca6"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/simple_blockchain-ec74a0757202ca3d
[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" "21c3e547ce82ef85f21f6b0896ea4aecfac86669d0a1d19313f6afd6362b6ca6"`
[INFO] running `"docker" "rm" "-f" "21c3e547ce82ef85f21f6b0896ea4aecfac86669d0a1d19313f6afd6362b6ca6"`
[INFO] [stdout] 21c3e547ce82ef85f21f6b0896ea4aecfac86669d0a1d19313f6afd6362b6ca6