[INFO] updating cached repository IvanovPvl/rubl
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/IvanovPvl/rubl
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/IvanovPvl/rubl" "work/ex/pr-60944/sources/master#589beb979c0f1a9736e02e578913db88398c3ba5/gh/IvanovPvl/rubl"`
[INFO] [stderr] Cloning into 'work/ex/pr-60944/sources/master#589beb979c0f1a9736e02e578913db88398c3ba5/gh/IvanovPvl/rubl'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/IvanovPvl/rubl" "work/ex/pr-60944/sources/try#42445ded8fd34235a676755cb5d079658ed51f6a/gh/IvanovPvl/rubl"`
[INFO] [stderr] Cloning into 'work/ex/pr-60944/sources/try#42445ded8fd34235a676755cb5d079658ed51f6a/gh/IvanovPvl/rubl'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b302a6da754a86d8ee6c276546d1ada5a33e87eb
[INFO] sha for GitHub repo IvanovPvl/rubl: b302a6da754a86d8ee6c276546d1ada5a33e87eb
[INFO] validating manifest of IvanovPvl/rubl on toolchain master#589beb979c0f1a9736e02e578913db88398c3ba5
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+589beb979c0f1a9736e02e578913db88398c3ba5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of IvanovPvl/rubl on toolchain try#42445ded8fd34235a676755cb5d079658ed51f6a
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+42445ded8fd34235a676755cb5d079658ed51f6a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing IvanovPvl/rubl
[INFO] finished frobbing IvanovPvl/rubl
[INFO] frobbed toml for IvanovPvl/rubl written to work/ex/pr-60944/sources/master#589beb979c0f1a9736e02e578913db88398c3ba5/gh/IvanovPvl/rubl/Cargo.toml
[INFO] started frobbing IvanovPvl/rubl
[INFO] finished frobbing IvanovPvl/rubl
[INFO] frobbed toml for IvanovPvl/rubl written to work/ex/pr-60944/sources/try#42445ded8fd34235a676755cb5d079658ed51f6a/gh/IvanovPvl/rubl/Cargo.toml
[INFO] crate IvanovPvl/rubl already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+589beb979c0f1a9736e02e578913db88398c3ba5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+42445ded8fd34235a676755cb5d079658ed51f6a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] checking IvanovPvl/rubl against master#589beb979c0f1a9736e02e578913db88398c3ba5 for pr-60944
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60944/worker-6/master#589beb979c0f1a9736e02e578913db88398c3ba5:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60944/sources/master#589beb979c0f1a9736e02e578913db88398c3ba5/gh/IvanovPvl/rubl:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+589beb979c0f1a9736e02e578913db88398c3ba5-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 62b9a6636bf343b43602f8cd140e55bdb63866f728120263f5ea9256a5a05442
[INFO] running `"docker" "start" "-a" "62b9a6636bf343b43602f8cd140e55bdb63866f728120263f5ea9256a5a05442"`
[INFO] [stderr]     Checking rubl v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `blockchain::Blockchain`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use blockchain::Blockchain;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Blockchain`
[INFO] [stderr]  --> src/blockchain.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct Blockchain {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/blockchain.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn new() -> Blockchain {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_block`
[INFO] [stderr]   --> src/blockchain.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn add_block(&mut self, data: Vec<u8>) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `blockchain::Blockchain`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use blockchain::Blockchain;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Blockchain`
[INFO] [stderr]  --> src/blockchain.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct Blockchain {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/blockchain.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn new() -> Blockchain {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_block`
[INFO] [stderr]   --> src/blockchain.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn add_block(&mut self, data: Vec<u8>) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `"docker" "inspect" "62b9a6636bf343b43602f8cd140e55bdb63866f728120263f5ea9256a5a05442"`
[INFO] running `"docker" "rm" "-f" "62b9a6636bf343b43602f8cd140e55bdb63866f728120263f5ea9256a5a05442"`
[INFO] [stdout] 62b9a6636bf343b43602f8cd140e55bdb63866f728120263f5ea9256a5a05442