[INFO] updating cached repository collin5/bc-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/collin5/bc-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/collin5/bc-rust" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/collin5/bc-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/collin5/bc-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/collin5/bc-rust" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/collin5/bc-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/collin5/bc-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 01f5ec94e8074a42622384d2c8f4d592597897a9
[INFO] sha for GitHub repo collin5/bc-rust: 01f5ec94e8074a42622384d2c8f4d592597897a9
[INFO] validating manifest of collin5/bc-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 collin5/bc-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 collin5/bc-rust
[INFO] finished frobbing collin5/bc-rust
[INFO] frobbed toml for collin5/bc-rust written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/collin5/bc-rust/Cargo.toml
[INFO] started frobbing collin5/bc-rust
[INFO] finished frobbing collin5/bc-rust
[INFO] frobbed toml for collin5/bc-rust written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/collin5/bc-rust/Cargo.toml
[INFO] crate collin5/bc-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 collin5/bc-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/collin5/bc-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] d68339df26c697fe7382e1b28639db4b7e93246a221ca1c8b124183ec2fa709f
[INFO] running `"docker" "start" "-a" "d68339df26c697fe7382e1b28639db4b7e93246a221ca1c8b124183ec2fa709f"`
[INFO] [stderr]     Checking sha2 v0.7.0
[INFO] [stderr]     Checking blockchain v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Write`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::Write;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::process`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::process;
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Write`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::Write;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::process`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::process;
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Blockheader`
[INFO] [stderr]   --> src/blockchain.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub struct Blockheader {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Block`
[INFO] [stderr]   --> src/blockchain.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub struct Block {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Chain`
[INFO] [stderr]   --> src/blockchain.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | pub struct Chain {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/blockchain.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     pub fn new(addr: String, difficulty: u32) -> Chain {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_trans`
[INFO] [stderr]   --> src/blockchain.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     pub fn new_trans(&mut self, sender: String, reciever: String, amount: f32) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `last_hash`
[INFO] [stderr]   --> src/blockchain.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn last_hash(&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `update_difficulty`
[INFO] [stderr]   --> src/blockchain.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn update_difficulty(&mut self, difficulty: u32) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `update_reward`
[INFO] [stderr]   --> src/blockchain.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |     pub fn update_reward(&mut self, reward: f32) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `gen_new_block`
[INFO] [stderr]   --> src/blockchain.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     pub fn gen_new_block(&mut self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_merkle`
[INFO] [stderr]    --> src/blockchain.rs:113:5
[INFO] [stderr]     |
[INFO] [stderr] 113 |     fn get_merkle(current_trans: Vec<Transation>) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `proof_of_work`
[INFO] [stderr]    --> src/blockchain.rs:136:5
[INFO] [stderr]     |
[INFO] [stderr] 136 |     pub fn proof_of_work(header: &mut Blockheader) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `hash`
[INFO] [stderr]    --> src/blockchain.rs:156:5
[INFO] [stderr]     |
[INFO] [stderr] 156 |     pub fn hash<T: serde::Serialize>(item: &T) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `hex_to_str`
[INFO] [stderr]    --> src/blockchain.rs:165:5
[INFO] [stderr]     |
[INFO] [stderr] 165 |     pub fn hex_to_str(res: &[u8]) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Blockheader`
[INFO] [stderr]   --> src/blockchain.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub struct Blockheader {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Block`
[INFO] [stderr]   --> src/blockchain.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub struct Block {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Chain`
[INFO] [stderr]   --> src/blockchain.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | pub struct Chain {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/blockchain.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     pub fn new(addr: String, difficulty: u32) -> Chain {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_trans`
[INFO] [stderr]   --> src/blockchain.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     pub fn new_trans(&mut self, sender: String, reciever: String, amount: f32) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `last_hash`
[INFO] [stderr]   --> src/blockchain.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn last_hash(&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `update_difficulty`
[INFO] [stderr]   --> src/blockchain.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn update_difficulty(&mut self, difficulty: u32) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `update_reward`
[INFO] [stderr]   --> src/blockchain.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |     pub fn update_reward(&mut self, reward: f32) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `gen_new_block`
[INFO] [stderr]   --> src/blockchain.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     pub fn gen_new_block(&mut self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_merkle`
[INFO] [stderr]    --> src/blockchain.rs:113:5
[INFO] [stderr]     |
[INFO] [stderr] 113 |     fn get_merkle(current_trans: Vec<Transation>) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `proof_of_work`
[INFO] [stderr]    --> src/blockchain.rs:136:5
[INFO] [stderr]     |
[INFO] [stderr] 136 |     pub fn proof_of_work(header: &mut Blockheader) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `hash`
[INFO] [stderr]    --> src/blockchain.rs:156:5
[INFO] [stderr]     |
[INFO] [stderr] 156 |     pub fn hash<T: serde::Serialize>(item: &T) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `hex_to_str`
[INFO] [stderr]    --> src/blockchain.rs:165:5
[INFO] [stderr]     |
[INFO] [stderr] 165 |     pub fn hex_to_str(res: &[u8]) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.45s
[INFO] running `"docker" "inspect" "d68339df26c697fe7382e1b28639db4b7e93246a221ca1c8b124183ec2fa709f"`
[INFO] running `"docker" "rm" "-f" "d68339df26c697fe7382e1b28639db4b7e93246a221ca1c8b124183ec2fa709f"`
[INFO] [stdout] d68339df26c697fe7382e1b28639db4b7e93246a221ca1c8b124183ec2fa709f