[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 1.83.0 for beta-1.84.0-4-retry
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeelgur%2Fsimplechain" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/keelgur/simplechain on toolchain 1.83.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.83.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-3-tc1/source/Cargo.toml
[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" "+1.83.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+1.83.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d3f48bc5113ead892c8efdea592f2426063f48a1ad7372c815bd95187c270e9a
[INFO] running `Command { std: "docker" "start" "-a" "d3f48bc5113ead892c8efdea592f2426063f48a1ad7372c815bd95187c270e9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d3f48bc5113ead892c8efdea592f2426063f48a1ad7372c815bd95187c270e9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3f48bc5113ead892c8efdea592f2426063f48a1ad7372c815bd95187c270e9a", kill_on_drop: false }`
[INFO] [stdout] d3f48bc5113ead892c8efdea592f2426063f48a1ad7372c815bd95187c270e9a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+1.83.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2434a5af7315a664cd27417ecd58f36057bdaf4ba1a9364dbf3c8fc012b35deb
[INFO] running `Command { std: "docker" "start" "-a" "2434a5af7315a664cd27417ecd58f36057bdaf4ba1a9364dbf3c8fc012b35deb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.40
[INFO] [stderr]    Compiling unicode-ident v1.0.2
[INFO] [stderr]    Compiling quote v1.0.20
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling serde v1.0.140
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling cfg-if v1.0.0
[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 ahash v0.7.6
[INFO] [stderr]    Compiling getrandom v0.2.7
[INFO] [stderr]    Compiling time v0.1.44
[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)]` 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)]` 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: `Errs` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[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: 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 `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: fields `difficulty` and `save_path` are never read
[INFO] [stdout]    --> src/chain.rs:152:5
[INFO] [stdout]     |
[INFO] [stdout] 151 | pub struct Config{
[INFO] [stdout]     |            ------ fields in this struct
[INFO] [stdout] 152 |     difficulty: String,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 153 |     save_path: 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 `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 20.26s
[INFO] running `Command { std: "docker" "inspect" "2434a5af7315a664cd27417ecd58f36057bdaf4ba1a9364dbf3c8fc012b35deb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2434a5af7315a664cd27417ecd58f36057bdaf4ba1a9364dbf3c8fc012b35deb", kill_on_drop: false }`
[INFO] [stdout] 2434a5af7315a664cd27417ecd58f36057bdaf4ba1a9364dbf3c8fc012b35deb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+1.83.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 780aafc56f6e9e6c6176417b8d37c3d0674b42a6383b022227a072f3aa782bbb
[INFO] running `Command { std: "docker" "start" "-a" "780aafc56f6e9e6c6176417b8d37c3d0674b42a6383b022227a072f3aa782bbb", 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)]` 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)]` 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)]` 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 0.99s
[INFO] running `Command { std: "docker" "inspect" "780aafc56f6e9e6c6176417b8d37c3d0674b42a6383b022227a072f3aa782bbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "780aafc56f6e9e6c6176417b8d37c3d0674b42a6383b022227a072f3aa782bbb", kill_on_drop: false }`
[INFO] [stdout] 780aafc56f6e9e6c6176417b8d37c3d0674b42a6383b022227a072f3aa782bbb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+1.83.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5541e8862c1a16efa5ec78a3e12414947ede5c7b62a0e153983e195370746b5b
[INFO] running `Command { std: "docker" "start" "-a" "5541e8862c1a16efa5ec78a3e12414947ede5c7b62a0e153983e195370746b5b", 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)]` 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)]` 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)]` 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" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/simplechain-604eccb84f4793ff)
[INFO] [stdout] running 4 tests
[INFO] [stdout] test test::test_blockchain ... ok
[INFO] [stdout] test test::test_config ... ok
[INFO] [stdout] test test::test_hasher ... ok
[INFO] [stdout] test test::test_saveload ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- test::test_saveload stdout ----
[INFO] [stdout] thread 'test::test_saveload' 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:     0x5d727828c33a - std::backtrace_rs::backtrace::libunwind::trace::h5a5b8284f2d0c266
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
[INFO] [stdout]    1:     0x5d727828c33a - std::backtrace_rs::backtrace::trace_unsynchronized::h76d4f1c9b0b875e3
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x5d727828c33a - std::sys::backtrace::_print_fmt::hc4546b8364a537c6
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5d727828c33a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h5b6bd5631a6d1f6b
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5d72782b1793 - core::fmt::rt::Argument::fmt::h270f6602a2b96f62
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/fmt/rt.rs:177:76
[INFO] [stdout]    5:     0x5d72782b1793 - core::fmt::write::h7550c97b06c86515
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/fmt/mod.rs:1186:21
[INFO] [stdout]    6:     0x5d7278289503 - std::io::Write::write_fmt::h509ff860e5956e5e
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/io/mod.rs:1839:15
[INFO] [stdout]    7:     0x5d727828c182 - std::sys::backtrace::BacktraceLock::print::h2395ccd2c84ba3aa
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    8:     0x5d727828d79a - std::panicking::default_hook::{{closure}}::he19d4c7230e07961
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:268:22
[INFO] [stdout]    9:     0x5d727828d5a4 - std::panicking::default_hook::hf614597d3c67bbdb
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:292:9
[INFO] [stdout]   10:     0x5d7278251ed9 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h39b51ce4599c23d1
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/alloc/src/boxed.rs:2468:9
[INFO] [stdout]   11:     0x5d7278251ed9 - test::test_main::{{closure}}::he977ae839a582784
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/test/src/lib.rs:133:21
[INFO] [stdout]   12:     0x5d727828de38 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h9455091b6b06f9fb
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/alloc/src/boxed.rs:2468:9
[INFO] [stdout]   13:     0x5d727828de38 - std::panicking::rust_panic_with_hook::h8942133a8b252070
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:809:13
[INFO] [stdout]   14:     0x5d727828dbfa - std::panicking::begin_panic_handler::{{closure}}::hb5f5963570096b29
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:674:13
[INFO] [stdout]   15:     0x5d727828c819 - std::sys::backtrace::__rust_end_short_backtrace::h6208cedc1922feda
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/sys/backtrace.rs:170:18
[INFO] [stdout]   16:     0x5d727828d88c - rust_begin_unwind
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:665:5
[INFO] [stdout]   17:     0x5d72781fca60 - core::panicking::panic_fmt::h0c3082644d1bf418
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/panicking.rs:74:14
[INFO] [stdout]   18:     0x5d72781fcea6 - core::result::unwrap_failed::hd20b4aa073bda1e2
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/result.rs:1700:5
[INFO] [stdout]   19:     0x5d727820713a - core::result::Result<T,E>::unwrap::h509734eb63ba6942
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/result.rs:1104:23
[INFO] [stdout]   20:     0x5d727820713a - simplechain::test::test_saveload::h7009455a8b86c44f
[INFO] [stdout]                                at /opt/rustwide/workdir/src/test.rs:116:20
[INFO] [stdout]   21:     0x5d7278206a37 - simplechain::test::test_saveload::{{closure}}::h42bb4ad19d53114e
[INFO] [stdout]                                at /opt/rustwide/workdir/src/test.rs:92:23
[INFO] [stdout]   22:     0x5d7278208e26 - core::ops::function::FnOnce::call_once::h205b305bcdea451c
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x5d727825689b - core::ops::function::FnOnce::call_once::h109cf8051a59b34e
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x5d727825689b - test::__rust_begin_short_backtrace::hf4fff89d377446ba
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/test/src/lib.rs:621:18
[INFO] [stdout]   25:     0x5d72782560d7 - test::run_test_in_process::{{closure}}::h0e39181dd7ee5a43
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/test/src/lib.rs:644:60
[INFO] [stdout]   26:     0x5d72782560d7 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hc5a66a30f0bdfd1f
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   27:     0x5d72782560d7 - std::panicking::try::do_call::h873b7cf639554a5e
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:557:40
[INFO] [stdout]   28:     0x5d72782560d7 - std::panicking::try::hdb19862fad9c8bd1
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:520:19
[INFO] [stdout]   29:     0x5d72782560d7 - std::panic::catch_unwind::h281fe732d236d260
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panic.rs:358:14
[INFO] [stdout]   30:     0x5d72782560d7 - test::run_test_in_process::h949b6df8457ed338
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/test/src/lib.rs:644:27
[INFO] [stdout]   31:     0x5d72782560d7 - test::run_test::{{closure}}::h52c556a6d4740e10
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/test/src/lib.rs:565:43
[INFO] [stdout]   32:     0x5d727821b3b4 - test::run_test::{{closure}}::h4237f6381c45ccb9
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/test/src/lib.rs:595:41
[INFO] [stdout]   33:     0x5d727821b3b4 - std::sys::backtrace::__rust_begin_short_backtrace::h505c97a579eca628
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/sys/backtrace.rs:154:18
[INFO] [stdout]   34:     0x5d727821ea7e - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h9e86b2e2bc107ea3
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/thread/mod.rs:538:17
[INFO] [stdout]   35:     0x5d727821ea7e - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h8b06ddb275ff4a25
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   36:     0x5d727821ea7e - std::panicking::try::do_call::hb26ecd7cd9a9355d
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:557:40
[INFO] [stdout]   37:     0x5d727821ea7e - std::panicking::try::h8ddeca9d705f9069
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:520:19
[INFO] [stdout]   38:     0x5d727821ea7e - std::panic::catch_unwind::h49e1c33078844c46
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panic.rs:358:14
[INFO] [stdout]   39:     0x5d727821ea7e - std::thread::Builder::spawn_unchecked_::{{closure}}::h6073db6ff56ad35d
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/thread/mod.rs:537:30
[INFO] [stdout]   40:     0x5d727821ea7e - core::ops::function::FnOnce::call_once{{vtable.shim}}::h2c5a5f3779c774f1
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x5d7278291b9b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf75717d9f28faebf
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/alloc/src/boxed.rs:2454:9
[INFO] [stdout]   42:     0x5d7278291b9b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7bd883a5f3c5f3c1
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/alloc/src/boxed.rs:2454:9
[INFO] [stdout]   43:     0x5d7278291b9b - std::sys::pal::unix::thread::Thread::new::thread_start::hcc78f3943333fa94
[INFO] [stdout]                                at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/sys/pal/unix/thread.rs:105:17
[INFO] [stdout]   44:     0x78c9a5662ac3 - <unknown>
[INFO] [stdout]   45:     0x78c9a56f3a04 - 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 0.05s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin simplechain`
[INFO] running `Command { std: "docker" "inspect" "5541e8862c1a16efa5ec78a3e12414947ede5c7b62a0e153983e195370746b5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5541e8862c1a16efa5ec78a3e12414947ede5c7b62a0e153983e195370746b5b", kill_on_drop: false }`
[INFO] [stdout] 5541e8862c1a16efa5ec78a3e12414947ede5c7b62a0e153983e195370746b5b
