[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/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/jk-gan/blockchain-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/jk-gan/blockchain-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jk-gan/blockchain-rust" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/jk-gan/blockchain-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/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 master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jk-gan/blockchain-rust on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "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/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/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/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/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" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking jk-gan/blockchain-rust against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-6/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/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=forbid" "-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" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f66d8011bad8744ceaac75fa53dd759571e021e4c2ef64de918127c1ef5f114b
[INFO] running `"docker" "start" "-a" "f66d8011bad8744ceaac75fa53dd759571e021e4c2ef64de918127c1ef5f114b"`
[INFO] [stderr]     Checking ring v0.13.5
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking 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] 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 3.30s
[INFO] running `"docker" "inspect" "f66d8011bad8744ceaac75fa53dd759571e021e4c2ef64de918127c1ef5f114b"`
[INFO] running `"docker" "rm" "-f" "f66d8011bad8744ceaac75fa53dd759571e021e4c2ef64de918127c1ef5f114b"`
[INFO] [stdout] f66d8011bad8744ceaac75fa53dd759571e021e4c2ef64de918127c1ef5f114b