[INFO] updating cached repository metmirr/blockchain
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/metmirr/blockchain
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/metmirr/blockchain" "work/ex/beta-1.37-6/sources/1.36.0/gh/metmirr/blockchain"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/metmirr/blockchain'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/metmirr/blockchain" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/metmirr/blockchain"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/metmirr/blockchain'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 12feef58baea3f50269aeb5eb8127d443de10894
[INFO] sha for GitHub repo metmirr/blockchain: 12feef58baea3f50269aeb5eb8127d443de10894
[INFO] validating manifest of metmirr/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 metmirr/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 metmirr/blockchain
[INFO] finished frobbing metmirr/blockchain
[INFO] frobbed toml for metmirr/blockchain written to work/ex/beta-1.37-6/sources/1.36.0/gh/metmirr/blockchain/Cargo.toml
[INFO] started frobbing metmirr/blockchain
[INFO] finished frobbing metmirr/blockchain
[INFO] frobbed toml for metmirr/blockchain written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/metmirr/blockchain/Cargo.toml
[INFO] crate metmirr/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing metmirr/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/metmirr/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] 1aaa465926ffc9b5b3acce367d926f17a5ccf924d8d8bee5102d4be0516bff04
[INFO] running `"docker" "start" "-a" "1aaa465926ffc9b5b3acce367d926f17a5ccf924d8d8bee5102d4be0516bff04"`
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling serde_json v1.0.36
[INFO] [stderr]    Compiling serde_derive v1.0.85
[INFO] [stderr]    Compiling blockchain v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `hash`
[INFO] [stderr]   --> src/main.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 |     fn hash(block: &str) -> String{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `last_block`
[INFO] [stderr]   --> src/main.rs:85:5
[INFO] [stderr]    |
[INFO] [stderr] 85 |     fn last_block(&self) -> &Block {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.43s
[INFO] running `"docker" "inspect" "1aaa465926ffc9b5b3acce367d926f17a5ccf924d8d8bee5102d4be0516bff04"`
[INFO] running `"docker" "rm" "-f" "1aaa465926ffc9b5b3acce367d926f17a5ccf924d8d8bee5102d4be0516bff04"`
[INFO] [stdout] 1aaa465926ffc9b5b3acce367d926f17a5ccf924d8d8bee5102d4be0516bff04
[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/metmirr/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] 7cf08c377b85d0307d0328bff480e5acc73b6cfb343bf0fbe2b0916f32461c97
[INFO] running `"docker" "start" "-a" "7cf08c377b85d0307d0328bff480e5acc73b6cfb343bf0fbe2b0916f32461c97"`
[INFO] [stderr]    Compiling blockchain v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `hash`
[INFO] [stderr]   --> src/main.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 |     fn hash(block: &str) -> String{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `last_block`
[INFO] [stderr]   --> src/main.rs:85:5
[INFO] [stderr]    |
[INFO] [stderr] 85 |     fn last_block(&self) -> &Block {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.15s
[INFO] running `"docker" "inspect" "7cf08c377b85d0307d0328bff480e5acc73b6cfb343bf0fbe2b0916f32461c97"`
[INFO] running `"docker" "rm" "-f" "7cf08c377b85d0307d0328bff480e5acc73b6cfb343bf0fbe2b0916f32461c97"`
[INFO] [stdout] 7cf08c377b85d0307d0328bff480e5acc73b6cfb343bf0fbe2b0916f32461c97
[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/metmirr/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] 5ad43e8d858a44b7e7295b79e552fbd3aa0136f8ccd6f110d1f821e10437ead7
[INFO] running `"docker" "start" "-a" "5ad43e8d858a44b7e7295b79e552fbd3aa0136f8ccd6f110d1f821e10437ead7"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/blockchain-b04f1eae57e249b3
[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" "5ad43e8d858a44b7e7295b79e552fbd3aa0136f8ccd6f110d1f821e10437ead7"`
[INFO] running `"docker" "rm" "-f" "5ad43e8d858a44b7e7295b79e552fbd3aa0136f8ccd6f110d1f821e10437ead7"`
[INFO] [stdout] 5ad43e8d858a44b7e7295b79e552fbd3aa0136f8ccd6f110d1f821e10437ead7