[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-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/collin5/bc-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/collin5/bc-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/collin5/bc-rust" "work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/collin5/bc-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/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#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of collin5/bc-rust on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-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-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/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-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/collin5/bc-rust/Cargo.toml
[INFO] crate collin5/bc-rust has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing collin5/bc-rust against try#7fea0229842e79db1159ea58ad9a653b288efee9 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-2/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "build" "--frozen"`
[INFO] [stdout] a9c4a6a84ce68f6c0225fd450d24c4b40dd2349489cfcb6316e1b859fbee66b5
[INFO] running `"docker" "start" "-a" "a9c4a6a84ce68f6c0225fd450d24c4b40dd2349489cfcb6316e1b859fbee66b5"`
[INFO] [stderr]    Compiling itoa v0.4.0
[INFO] [stderr]    Compiling serde_derive_internals v0.21.0
[INFO] [stderr]    Compiling serde_json v1.0.12
[INFO] [stderr]    Compiling serde_derive v1.0.33
[INFO] [stderr]    Compiling 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: 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 9.73s
[INFO] running `"docker" "inspect" "a9c4a6a84ce68f6c0225fd450d24c4b40dd2349489cfcb6316e1b859fbee66b5"`
[INFO] running `"docker" "rm" "-f" "a9c4a6a84ce68f6c0225fd450d24c4b40dd2349489cfcb6316e1b859fbee66b5"`
[INFO] [stdout] a9c4a6a84ce68f6c0225fd450d24c4b40dd2349489cfcb6316e1b859fbee66b5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-2/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] 88d9015c913ce95a7e8c56a0d174786da6e8e51a91494e369926c2df0c0555c2
[INFO] running `"docker" "start" "-a" "88d9015c913ce95a7e8c56a0d174786da6e8e51a91494e369926c2df0c0555c2"`
[INFO] [stderr]    Compiling 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: 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 1.07s
[INFO] running `"docker" "inspect" "88d9015c913ce95a7e8c56a0d174786da6e8e51a91494e369926c2df0c0555c2"`
[INFO] running `"docker" "rm" "-f" "88d9015c913ce95a7e8c56a0d174786da6e8e51a91494e369926c2df0c0555c2"`
[INFO] [stdout] 88d9015c913ce95a7e8c56a0d174786da6e8e51a91494e369926c2df0c0555c2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-2/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen"`
[INFO] [stdout] 829ea6f4ac74460ecb680671f8990466f41a07f392134a26bc00bb89cdba00fb
[INFO] running `"docker" "start" "-a" "829ea6f4ac74460ecb680671f8990466f41a07f392134a26bc00bb89cdba00fb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/blockchain-782d2b6b9f49e204
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "829ea6f4ac74460ecb680671f8990466f41a07f392134a26bc00bb89cdba00fb"`
[INFO] running `"docker" "rm" "-f" "829ea6f4ac74460ecb680671f8990466f41a07f392134a26bc00bb89cdba00fb"`
[INFO] [stdout] 829ea6f4ac74460ecb680671f8990466f41a07f392134a26bc00bb89cdba00fb