[INFO] updating cached repository soniceroy/RustBlockchain
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/soniceroy/RustBlockchain
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/soniceroy/RustBlockchain" "work/ex/beta-1.38-1/sources/1.37.0/gh/soniceroy/RustBlockchain"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/soniceroy/RustBlockchain'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/soniceroy/RustBlockchain" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/soniceroy/RustBlockchain"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/soniceroy/RustBlockchain'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c33433ce9ef133f14b9a808520b6b0bc275bbc9b
[INFO] sha for GitHub repo soniceroy/RustBlockchain: c33433ce9ef133f14b9a808520b6b0bc275bbc9b
[INFO] validating manifest of soniceroy/RustBlockchain on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of soniceroy/RustBlockchain on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing soniceroy/RustBlockchain
[INFO] finished frobbing soniceroy/RustBlockchain
[INFO] frobbed toml for soniceroy/RustBlockchain written to work/ex/beta-1.38-1/sources/1.37.0/gh/soniceroy/RustBlockchain/Cargo.toml
[INFO] started frobbing soniceroy/RustBlockchain
[INFO] finished frobbing soniceroy/RustBlockchain
[INFO] frobbed toml for soniceroy/RustBlockchain written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/soniceroy/RustBlockchain/Cargo.toml
[INFO] crate soniceroy/RustBlockchain already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing soniceroy/RustBlockchain against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/soniceroy/RustBlockchain:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 473f29394030b21b9c144a77b8ba7feda1370cac1fa8b8078739d79e2c495680
[INFO] running `"docker" "start" "-a" "473f29394030b21b9c144a77b8ba7feda1370cac1fa8b8078739d79e2c495680"`
[INFO] [stderr]    Compiling blockchain v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0495]: cannot infer an appropriate lifetime for lifetime parameter `'a` due to conflicting requirements
[INFO] [stderr]   --> src/main.rs:59:19
[INFO] [stderr]    |
[INFO] [stderr] 59 |         let new_block = Block::new(0, self.current_transactions, 100, 0);
[INFO] [stderr]    |                         ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: first, the lifetime cannot outlive the anonymous lifetime #1 defined on the method body at 57:2...
[INFO] [stderr]   --> src/main.rs:57:2
[INFO] [stderr]    |
[INFO] [stderr] 57 |       fn new_block(&mut self) {
[INFO] [stderr]    |  _____^
[INFO] [stderr] 58 | |
[INFO] [stderr] 59 | |         let new_block = Block::new(0, self.current_transactions, 100, 0);
[INFO] [stderr] 60 | |         self.chain.push(new_block);
[INFO] [stderr] 61 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] note: ...so that reference does not outlive borrowed content
[INFO] [stderr]   --> src/main.rs:59:33
[INFO] [stderr]    |
[INFO] [stderr] 59 |         let new_block = Block::new(0, self.current_transactions, 100, 0);
[INFO] [stderr]    |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] note: but, the lifetime must be valid for the lifetime 'a as defined on the impl at 50:7...
[INFO] [stderr]   --> src/main.rs:50:7
[INFO] [stderr]    |
[INFO] [stderr] 50 | impl <'a>Blockchain<'a> {
[INFO] [stderr]    |       ^^
[INFO] [stderr]    = note: ...so that the expression is assignable:
[INFO] [stderr]            expected Block<'a>
[INFO] [stderr]               found Block<'_>
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `blockchain`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "473f29394030b21b9c144a77b8ba7feda1370cac1fa8b8078739d79e2c495680"`
[INFO] running `"docker" "rm" "-f" "473f29394030b21b9c144a77b8ba7feda1370cac1fa8b8078739d79e2c495680"`
[INFO] [stdout] 473f29394030b21b9c144a77b8ba7feda1370cac1fa8b8078739d79e2c495680