[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/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/uma0317/Rust-BlockChain"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/uma0317/Rust-BlockChain'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/uma0317/Rust-BlockChain" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/uma0317/Rust-BlockChain"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/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 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 uma0317/Rust-BlockChain 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 uma0317/Rust-BlockChain
[INFO] finished frobbing uma0317/Rust-BlockChain
[INFO] frobbed toml for uma0317/Rust-BlockChain written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/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/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/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" "+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 uma0317/Rust-BlockChain against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-2/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/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=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] e2ab84c714183a3024017880b3274d3387450818e352aa1360025ddba383383f
[INFO] running `"docker" "start" "-a" "e2ab84c714183a3024017880b3274d3387450818e352aa1360025ddba383383f"`
[INFO] [stderr]    Compiling num-traits v0.2.4
[INFO] [stderr]    Compiling num-integer v0.1.38
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]     Checking chrono v0.4.2
[INFO] [stderr]     Checking 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: 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] 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 9.49s
[INFO] running `"docker" "inspect" "e2ab84c714183a3024017880b3274d3387450818e352aa1360025ddba383383f"`
[INFO] running `"docker" "rm" "-f" "e2ab84c714183a3024017880b3274d3387450818e352aa1360025ddba383383f"`
[INFO] [stdout] e2ab84c714183a3024017880b3274d3387450818e352aa1360025ddba383383f