[INFO] cloning repository https://github.com/keelgur/simplechain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/keelgur/simplechain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeelgur%2Fsimplechain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeelgur%2Fsimplechain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0f4b5201e8e097e6987a5788066b7aed7649a144
[INFO] testing keelgur/simplechain against beta-2026-01-20 for beta-1.94-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeelgur%2Fsimplechain" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/keelgur/simplechain
[INFO] finished tweaking git repo https://github.com/keelgur/simplechain
[INFO] tweaked toml for git repo https://github.com/keelgur/simplechain written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/keelgur/simplechain on toolchain beta-2026-01-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/keelgur/simplechain already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 463897a2bcfb14d2f273ccba30141f954a898f2580ae15dfc3a34cfe202ba078
[INFO] running `Command { std: "docker" "start" "-a" "463897a2bcfb14d2f273ccba30141f954a898f2580ae15dfc3a34cfe202ba078", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "463897a2bcfb14d2f273ccba30141f954a898f2580ae15dfc3a34cfe202ba078", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "463897a2bcfb14d2f273ccba30141f954a898f2580ae15dfc3a34cfe202ba078", kill_on_drop: false }`
[INFO] [stdout] 463897a2bcfb14d2f273ccba30141f954a898f2580ae15dfc3a34cfe202ba078
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c307fbd5fa075a62d2a7ef6c16c42c7ab2e232cff72854145bee817c5e32874f
[INFO] running `Command { std: "docker" "start" "-a" "c307fbd5fa075a62d2a7ef6c16c42c7ab2e232cff72854145bee817c5e32874f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.40
[INFO] [stderr]    Compiling quote v1.0.20
[INFO] [stderr]    Compiling unicode-ident v1.0.2
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling serde v1.0.140
[INFO] [stderr]    Compiling serde_derive v1.0.140
[INFO] [stderr]    Compiling once_cell v1.13.0
[INFO] [stderr]    Compiling serde_json v1.0.82
[INFO] [stderr]    Compiling itoa v1.0.2
[INFO] [stderr]    Compiling ryu v1.0.10
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling getrandom v0.2.7
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling toml v0.5.9
[INFO] [stderr]    Compiling borsh-derive-internal v0.9.3
[INFO] [stderr]    Compiling borsh-schema-derive-internal v0.9.3
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]    Compiling borsh-derive v0.9.3
[INFO] [stderr]    Compiling borsh v0.9.3
[INFO] [stderr]    Compiling simplechain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `hash`
[INFO] [stdout]    --> src/chain.rs:183:13
[INFO] [stdout]     |
[INFO] [stdout] 183 |         let hash = s.finish();
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_hash`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/chain.rs:204:17
[INFO] [stdout]     |
[INFO] [stdout] 204 |             let mut l:Vec<Block>=Vec::new();
[INFO] [stdout]     |                 ----^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Errs` is never used
[INFO] [stdout]   --> src/chain.rs:12:10
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub enum Errs{
[INFO] [stdout]    |          ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Transaction` is never constructed
[INFO] [stdout]   --> src/chain.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct Transaction{
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/chain.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl Transaction{
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 27 |     pub fn new(fr:&str,t:&str,am:f64) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Block` is never constructed
[INFO] [stdout]   --> src/chain.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 |  pub struct Block{
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `hash_block`, and `get_prev` are never used
[INFO] [stdout]   --> src/chain.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl Block{
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] 45 |     pub fn new(pr:&str) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     pub fn hash_block(&self) -> u64 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 53 |     pub fn get_prev(&self)->String{
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Blockchain` is never constructed
[INFO] [stdout]   --> src/chain.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub struct Blockchain{
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Mempool` is never constructed
[INFO] [stdout]   --> src/chain.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub struct Mempool{
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/chain.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 67 | impl Mempool{
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 68 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `on_transaction`, and `mint` are never used
[INFO] [stdout]   --> src/chain.rs:74:12
[INFO] [stdout]    |
[INFO] [stdout] 73 | impl Blockchain{
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 74 |     pub fn new(mut list: Vec<Block>) -> Self{
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 87 |      pub fn on_transaction(tx: Transaction, pool:&mut Mempool) {
[INFO] [stdout]    |             ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 90 |     pub fn mint(&mut self, pool: &mut Mempool) ->Result<(),Errs>{
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Header` is never constructed
[INFO] [stdout]    --> src/chain.rs:108:12
[INFO] [stdout]     |
[INFO] [stdout] 108 | pub struct Header{
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `mint_pow` is never used
[INFO] [stdout]    --> src/chain.rs:116:8
[INFO] [stdout]     |
[INFO] [stdout] 115 | impl Blockchain{
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] 116 |     fn mint_pow(&mut self, pool: &mut Mempool)->Result<Header,Errs>{
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Config` is never constructed
[INFO] [stdout]    --> src/chain.rs:151:12
[INFO] [stdout]     |
[INFO] [stdout] 151 | pub struct Config{
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `load_config` is never used
[INFO] [stdout]    --> src/chain.rs:156:8
[INFO] [stdout]     |
[INFO] [stdout] 156 | pub fn load_config()->Config{
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_savepath` is never used
[INFO] [stdout]    --> src/chain.rs:164:12
[INFO] [stdout]     |
[INFO] [stdout] 163 | impl Config{
[INFO] [stdout]     | ----------- method in this implementation
[INFO] [stdout] 164 |     pub fn get_savepath(&self)->String{
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mine_block` is never used
[INFO] [stdout]    --> src/chain.rs:170:4
[INFO] [stdout]     |
[INFO] [stdout] 170 | fn mine_block(b:&Block, head:&Header, diff:&Config) -> (u64, String) {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `load` and `save` are never used
[INFO] [stdout]    --> src/chain.rs:193:12
[INFO] [stdout]     |
[INFO] [stdout] 192 | impl Blockchain{
[INFO] [stdout]     | --------------- methods in this implementation
[INFO] [stdout] 193 |     pub fn load<P: AsRef<Path>>(&self,path: P) -> Blockchain {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 208 |     pub fn save(&self,config: &Config) -> std::io::Result<()> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.32s
[INFO] running `Command { std: "docker" "inspect" "c307fbd5fa075a62d2a7ef6c16c42c7ab2e232cff72854145bee817c5e32874f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c307fbd5fa075a62d2a7ef6c16c42c7ab2e232cff72854145bee817c5e32874f", kill_on_drop: false }`
[INFO] [stdout] c307fbd5fa075a62d2a7ef6c16c42c7ab2e232cff72854145bee817c5e32874f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 680f4df890a1aec950e482dbd3a26ce66bc23e355bfe13d46fef7281224b72ad
[INFO] running `Command { std: "docker" "start" "-a" "680f4df890a1aec950e482dbd3a26ce66bc23e355bfe13d46fef7281224b72ad", kill_on_drop: false }`
[INFO] [stderr]    Compiling simplechain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `hash`
[INFO] [stdout]    --> src/chain.rs:183:13
[INFO] [stdout]     |
[INFO] [stdout] 183 |         let hash = s.finish();
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_hash`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/chain.rs:204:17
[INFO] [stdout]     |
[INFO] [stdout] 204 |             let mut l:Vec<Block>=Vec::new();
[INFO] [stdout]     |                 ----^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `NotEnoughTransactionsError` is never constructed
[INFO] [stdout]   --> src/chain.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub enum Errs{
[INFO] [stdout]    |          ---- variant in this enum
[INFO] [stdout] 13 |     EmptyMempoolError,
[INFO] [stdout] 14 |     NotEnoughTransactionsError,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Errs` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Header` is never constructed
[INFO] [stdout]    --> src/chain.rs:108:12
[INFO] [stdout]     |
[INFO] [stdout] 108 | pub struct Header{
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `mint_pow` is never used
[INFO] [stdout]    --> src/chain.rs:116:8
[INFO] [stdout]     |
[INFO] [stdout] 115 | impl Blockchain{
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] 116 |     fn mint_pow(&mut self, pool: &mut Mempool)->Result<Header,Errs>{
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `difficulty` is never read
[INFO] [stdout]    --> src/chain.rs:152:5
[INFO] [stdout]     |
[INFO] [stdout] 151 | pub struct Config{
[INFO] [stdout]     |            ------ field in this struct
[INFO] [stdout] 152 |     difficulty: String,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Config` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mine_block` is never used
[INFO] [stdout]    --> src/chain.rs:170:4
[INFO] [stdout]     |
[INFO] [stdout] 170 | fn mine_block(b:&Block, head:&Header, diff:&Config) -> (u64, String) {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `Command { std: "docker" "inspect" "680f4df890a1aec950e482dbd3a26ce66bc23e355bfe13d46fef7281224b72ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "680f4df890a1aec950e482dbd3a26ce66bc23e355bfe13d46fef7281224b72ad", kill_on_drop: false }`
[INFO] [stdout] 680f4df890a1aec950e482dbd3a26ce66bc23e355bfe13d46fef7281224b72ad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 46e898dbbe11e0398082b9145bc4e3dc81fe32de118b1acc01d8af8321d4ef5b
[INFO] running `Command { std: "docker" "start" "-a" "46e898dbbe11e0398082b9145bc4e3dc81fe32de118b1acc01d8af8321d4ef5b", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `hash`
[INFO] [stderr]    --> src/chain.rs:183:13
[INFO] [stderr]     |
[INFO] [stderr] 183 |         let hash = s.finish();
[INFO] [stderr]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_hash`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/chain.rs:204:17
[INFO] [stderr]     |
[INFO] [stderr] 204 |             let mut l:Vec<Block>=Vec::new();
[INFO] [stderr]     |                 ----^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant `NotEnoughTransactionsError` is never constructed
[INFO] [stderr]   --> src/chain.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub enum Errs{
[INFO] [stderr]    |          ---- variant in this enum
[INFO] [stderr] 13 |     EmptyMempoolError,
[INFO] [stderr] 14 |     NotEnoughTransactionsError,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Errs` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Header` is never constructed
[INFO] [stderr]    --> src/chain.rs:108:12
[INFO] [stderr]     |
[INFO] [stderr] 108 | pub struct Header{
[INFO] [stderr]     |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `mint_pow` is never used
[INFO] [stderr]    --> src/chain.rs:116:8
[INFO] [stderr]     |
[INFO] [stderr] 115 | impl Blockchain{
[INFO] [stderr]     | --------------- method in this implementation
[INFO] [stderr] 116 |     fn mint_pow(&mut self, pool: &mut Mempool)->Result<Header,Errs>{
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `difficulty` is never read
[INFO] [stderr]    --> src/chain.rs:152:5
[INFO] [stderr]     |
[INFO] [stderr] 151 | pub struct Config{
[INFO] [stderr]     |            ------ field in this struct
[INFO] [stderr] 152 |     difficulty: String,
[INFO] [stderr]     |     ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Config` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: function `mine_block` is never used
[INFO] [stderr]    --> src/chain.rs:170:4
[INFO] [stderr]     |
[INFO] [stderr] 170 | fn mine_block(b:&Block, head:&Header, diff:&Config) -> (u64, String) {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `simplechain` (bin "simplechain" test) generated 7 warnings (run `cargo fix --bin "simplechain" -p simplechain --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/simplechain-e772e4f8f857435c)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test test::test_hasher ... ok
[INFO] [stdout] test test::test_blockchain ... ok
[INFO] [stdout] test test::test_config ... ok
[INFO] [stderr] error: test failed, to rerun pass `--bin simplechain`
[INFO] [stdout] test test::test_saveload ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- test::test_saveload stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'test::test_saveload' (28) panicked at src/test.rs:116:22:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No such file or directory" }
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5e62f9ff78d2 - std::backtrace_rs::backtrace::libunwind::trace::hf0bd46b30bc61685
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5e62f9ff78d2 - std::backtrace_rs::backtrace::trace_unsynchronized::h1d1fbb72ad89d7b7
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5e62f9ff78d2 - std::sys::backtrace::_print_fmt::he38b6f68ca847f47
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x5e62f9ff78d2 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hb7e843cde1bc81a3
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x5e62fa0079da - core::fmt::rt::Argument::fmt::hc1dd77ac64f2688c
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x5e62fa0079da - core::fmt::write::h952c506e2dbe9cff
[INFO] [stdout]    6:     0x5e62f9fc6856 - std::io::default_write_fmt::hd23bd8145c03a23a
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5e62f9fc6856 - std::io::Write::write_fmt::hdd3314a2bd8a34bd
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:1994:13
[INFO] [stdout]    8:     0x5e62f9fd6db9 - std::sys::backtrace::BacktraceLock::print::h1079b82381c2c252
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x5e62f9fd6db9 - std::panicking::default_hook::{{closure}}::h85cb76b8462c00f2
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x5e62f9fd6c51 - std::panicking::default_hook::h0134d220cc034c02
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x5e62f9f94f1e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb2e68dca3970e3ca
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   12:     0x5e62f9f94f1e - test::test_main_with_exit_callback::{{closure}}::ha7ec2063a2565ec3
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5e62f9fd7032 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::haebee478d0f56cf4
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   14:     0x5e62f9fd7032 - std::panicking::panic_with_hook::h8119b6db1fef734f
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x5e62f9fd6e78 - std::panicking::panic_handler::{{closure}}::h24f5360b91482c0e
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:698:13
[INFO] [stdout]   16:     0x5e62f9fd2409 - std::sys::backtrace::__rust_end_short_backtrace::h4e60c5cbd1bd0108
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x5e62f9fbb44d - __rustc[e4c6931bd8050421]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x5e62fa00ef0c - core::panicking::panic_fmt::hb1614a3ff6840071
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x5e62fa00e762 - core::result::unwrap_failed::h7d4c34940aded59c
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/result.rs:1867:5
[INFO] [stdout]   20:     0x5e62f9f5feea - core::result::Result<T,E>::unwrap::h1d98cae1c3a25874
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/result.rs:1233:23
[INFO] [stdout]   21:     0x5e62f9f5feea - simplechain::test::test_saveload::h5ed6b4cff9c1dbdb
[INFO] [stdout]                                at /opt/rustwide/workdir/src/test.rs:116:22
[INFO] [stdout]   22:     0x5e62f9f60347 - simplechain::test::test_saveload::{{closure}}::he834f3f88f6e7515
[INFO] [stdout]                                at /opt/rustwide/workdir/src/test.rs:92:23
[INFO] [stdout]   23:     0x5e62f9f65ee6 - core::ops::function::FnOnce::call_once::h241273b09801176a
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x5e62f9f94d1b - core::ops::function::FnOnce::call_once::hefaf63600cd43d2a
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x5e62f9f94d1b - test::__rust_begin_short_backtrace::he30322a73a0e9ea6
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:663:18
[INFO] [stdout]   26:     0x5e62f9fa86ea - test::run_test_in_process::{{closure}}::hdea3ab8d0243ef36
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:686:74
[INFO] [stdout]   27:     0x5e62f9fa86ea - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h66d192f42498ffce
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   28:     0x5e62f9fa86ea - std::panicking::catch_unwind::do_call::h822e18e8d3a6bb65
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:581:40
[INFO] [stdout]   29:     0x5e62f9fa86ea - std::panicking::catch_unwind::h54b1de7ceab578bf
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:544:19
[INFO] [stdout]   30:     0x5e62f9fa86ea - std::panic::catch_unwind::h60c29b7a9d0246b1
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x5e62f9fa86ea - test::run_test_in_process::h6099b5f871379b13
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:686:27
[INFO] [stdout]   32:     0x5e62f9fa86ea - test::run_test::{{closure}}::h926ce0a38281a4c8
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:607:43
[INFO] [stdout]   33:     0x5e62f9f82b44 - test::run_test::{{closure}}::h508de21a9afc7140
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:637:41
[INFO] [stdout]   34:     0x5e62f9f82b44 - std::sys::backtrace::__rust_begin_short_backtrace::h6e2f5c39ca00735a
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   35:     0x5e62f9f86402 - std::thread::lifecycle::spawn_unchecked::{{closure}}::{{closure}}::h133e44f0e5802c14
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stdout]   36:     0x5e62f9f86402 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h4718c1285283955c
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   37:     0x5e62f9f86402 - std::panicking::catch_unwind::do_call::h0bba3937b4892238
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:581:40
[INFO] [stdout]   38:     0x5e62f9f86402 - std::panicking::catch_unwind::h5b31cab5fb8c5d7f
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:544:19
[INFO] [stdout]   39:     0x5e62f9f86402 - std::panic::catch_unwind::hb2fa05d52ed0124e
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x5e62f9f86402 - std::thread::lifecycle::spawn_unchecked::{{closure}}::hf401cf5ff501bd29
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stdout]   41:     0x5e62f9f86402 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h160022e94ce3b0bb
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x5e62f9fcd69f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf234e0d1d1d272ba
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2206:9
[INFO] [stdout]   43:     0x5e62f9fcd69f - std::sys::thread::unix::Thread::new::thread_start::h106a295241840d3b
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/thread/unix.rs:127:17
[INFO] [stdout]   44:     0x76afe8fb7aa4 - <unknown>
[INFO] [stdout]   45:     0x76afe9044a64 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     test::test_saveload
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 3 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "46e898dbbe11e0398082b9145bc4e3dc81fe32de118b1acc01d8af8321d4ef5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46e898dbbe11e0398082b9145bc4e3dc81fe32de118b1acc01d8af8321d4ef5b", kill_on_drop: false }`
[INFO] [stdout] 46e898dbbe11e0398082b9145bc4e3dc81fe32de118b1acc01d8af8321d4ef5b
