[INFO] cloning repository https://github.com/puzzzzzzle/rust_study
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/puzzzzzzle/rust_study" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpuzzzzzzle%2Frust_study", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpuzzzzzzle%2Frust_study'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 333db4e27d63b390802e3b9f8cf17bfd5fdc3ba7
[INFO] checking puzzzzzzle/rust_study against master#e4106065bf1bb515935d5d024e8d9c86454e2b22 for pr-112160
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpuzzzzzzle%2Frust_study" "/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/puzzzzzzle/rust_study on toolchain e4106065bf1bb515935d5d024e8d9c86454e2b22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e4106065bf1bb515935d5d024e8d9c86454e2b22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/puzzzzzzle/rust_study
[INFO] finished tweaking git repo https://github.com/puzzzzzzle/rust_study
[INFO] tweaked toml for git repo https://github.com/puzzzzzzle/rust_study written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/puzzzzzzle/rust_study 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" "+e4106065bf1bb515935d5d024e8d9c86454e2b22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: some crates are on edition 2021 which defaults to `resolver = "2"`, but virtual workspaces default to `resolver = "1"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
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[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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e4106065bf1bb515935d5d024e8d9c86454e2b22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "d93777960f29d2b4afcd935ee64bee9f142fb1024bc2b21920df6ea44b7c3fca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d93777960f29d2b4afcd935ee64bee9f142fb1024bc2b21920df6ea44b7c3fca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d93777960f29d2b4afcd935ee64bee9f142fb1024bc2b21920df6ea44b7c3fca", kill_on_drop: false }`
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[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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e4106065bf1bb515935d5d024e8d9c86454e2b22" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "4dc7ed88acb0d9d7a701e79edd39ac0816904bf63054f38c66ec67d59ec39b77", kill_on_drop: false }`
[INFO] [stderr] warning: some crates are on edition 2021 which defaults to `resolver = "2"`, but virtual workspaces default to `resolver = "1"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
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[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]    Compiling atty v0.2.14
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[INFO] [stderr]    Compiling rust_call_c_manul v0.1.0 (/opt/rustwide/workdir/rust_with_c/rust_with_c_manul)
[INFO] [stderr]    Compiling cxx-build v1.0.94
[INFO] [stderr]     Checking num v0.1.42
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[INFO] [stderr]     Checking guess_game v0.1.0 (/opt/rustwide/workdir/module_test/guess_game)
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[INFO] [stderr]    Compiling cxxbridge-macro v1.0.94
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[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling proc_macros v0.1.0 (/opt/rustwide/workdir/proc_macros)
[INFO] [stderr]    Compiling futures-macro v0.3.27
[INFO] [stderr]    Compiling aquamarine v0.1.12
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[INFO] [stderr]    Compiling strum_macros v0.24.3
[INFO] [stderr]    Compiling use_cxx_lib v0.1.0 (/opt/rustwide/workdir/rust_with_c/use_cxx_lib)
[INFO] [stderr]    Compiling textwrap v0.15.2
[INFO] [stderr]    Compiling miette v5.6.0
[INFO] [stderr]     Checking moveit v0.5.1
[INFO] [stderr]     Checking futures-executor v0.3.27
[INFO] [stderr]     Checking futures v0.3.27
[INFO] [stderr]     Checking serde-value v0.7.0
[INFO] [stderr]     Checking serde_yaml v0.8.26
[INFO] [stderr]    Compiling toml v0.5.11
[INFO] [stderr]    Compiling env_logger v0.9.3
[INFO] [stderr]     Checking log4rs v1.2.0
[INFO] [stderr]    Compiling autocxx-parser v0.25.0
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]     Checking common v0.1.0 (/opt/rustwide/workdir/common)
[INFO] [stderr]     Checking common_concepts v0.1.0 (/opt/rustwide/workdir/rust_language)
[INFO] [stdout] warning: unused import: `common`
[INFO] [stdout]  --> rust_language/examples/c01_func_test.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use common;
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::*`
[INFO] [stdout]  --> rust_language/examples/c01_func_test.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use log::*;
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]   --> rust_language/examples/c06_std_collections_test.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |     use std::collections::HashMap;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]   --> rust_language/examples/c06_std_collections_test.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | mod test_collections {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> rust_language/examples/multi_file_exaplpe/ex2.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {}
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling function_name-proc-macro v0.2.3
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello_func` is never used
[INFO] [stdout]   --> rust_language/examples/c01_func_test.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn hello_func() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello_int` is never used
[INFO] [stdout]   --> rust_language/examples/c01_func_test.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn hello_int(name: i32) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello_ret_int` is never used
[INFO] [stdout]   --> rust_language/examples/c01_func_test.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn hello_ret_int(name: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_if` is never used
[INFO] [stdout]   --> rust_language/examples/c01_func_test.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn test_if(cond: bool) -> i32 {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loop_test` is never used
[INFO] [stdout]   --> rust_language/examples/c01_func_test.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn loop_test() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `outter_fn` is never used
[INFO] [stdout]   --> rust_language/examples/c01_func_test.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn outter_fn() -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `factorial` is never used
[INFO] [stdout]  --> rust_language/examples/macro_test.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn factorial(mut n: u64) -> u64 {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_ownership` is never used
[INFO] [stdout]   --> rust_language/examples/c03_test_ownership.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn take_ownership(s: String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `takes_and_gives_back` is never used
[INFO] [stdout]   --> rust_language/examples/c03_test_ownership.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn takes_and_gives_back(s: String) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrow` is never used
[INFO] [stdout]   --> rust_language/examples/c03_test_ownership.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn borrow(s: &mut String) {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `str_arr` is never used
[INFO] [stdout]   --> rust_language/examples/c03_test_ownership.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn str_arr(arr: &[i32]) -> String {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::executor::block_on`
[INFO] [stdout]  --> rust_language/examples/co_test.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::executor::block_on;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::pin::Pin`
[INFO] [stdout]  --> rust_language/examples/pin_test.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::pin::Pin;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Result`, `anyhow`
[INFO] [stdout]  --> rust_language/examples/c07-1_error_handle.rs:1:14
[INFO] [stdout]   |
[INFO] [stdout] 1 | use anyhow::{anyhow, Result};
[INFO] [stdout]   |              ^^^^^^  ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `common`
[INFO] [stdout]  --> rust_language/examples/c07-1_error_handle.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use common;
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::*`
[INFO] [stdout]  --> rust_language/examples/c07-1_error_handle.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use log::*;
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `V4` and `V6` are never constructed
[INFO] [stdout]  --> rust_language/examples/c04_enum_test.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     enum IpAddrKind {
[INFO] [stdout]   |          ---------- variants in this enum
[INFO] [stdout] 4 |         V4,
[INFO] [stdout]   |         ^^
[INFO] [stdout] 5 |         V6,
[INFO] [stdout]   |         ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `IpAddrKind` 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: fields `kind` and `address` are never read
[INFO] [stdout]   --> rust_language/examples/c04_enum_test.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 9  |     struct IpAddr {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 10 |         kind: IpAddrKind,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 11 |         address: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `V4`, `V6`, and `UNKNOWN` are never constructed
[INFO] [stdout]   --> rust_language/examples/c04_enum_test.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |     enum IpAddr {
[INFO] [stdout]    |          ------ variants in this enum
[INFO] [stdout] 58 |         V4(String),
[INFO] [stdout]    |         ^^
[INFO] [stdout] 59 |         V6(String),
[INFO] [stdout]    |         ^^
[INFO] [stdout] 60 |         UNKNOWN(UnknownIpAddr),
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::remove_file`
[INFO] [stdout]  --> rust_language/examples/c07_error_test.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs::remove_file;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::ErrorKind`
[INFO] [stdout]  --> rust_language/examples/c07_error_test.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::ErrorKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello` is never used
[INFO] [stdout]  --> rust_language/examples/co_test.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | async fn hello() -> String {
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello_1` is never used
[INFO] [stdout]  --> rust_language/examples/co_test.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 | async fn hello_1() -> String {
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello_1_2` is never used
[INFO] [stdout]   --> rust_language/examples/co_test.rs:11:10
[INFO] [stdout]    |
[INFO] [stdout] 11 | async fn hello_1_2() -> String {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello_latter` is never used
[INFO] [stdout]   --> rust_language/examples/co_test.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | async fn hello_latter() -> String {
[INFO] [stdout]    |          ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_user` is never used
[INFO] [stdout]   --> rust_language/examples/c05_struct_test.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn build_user(username: String) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `area` is never used
[INFO] [stdout]   --> rust_language/examples/c05_struct_test.rs:60:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | impl Rectangle {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 60 |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `area` is never used
[INFO] [stdout]   --> rust_language/examples/c05_struct_test.rs:76:4
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn area(rectangle: &Rectangle) -> u32 {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `combine_vecs` is never used
[INFO] [stdout]    --> rust_language/examples/c05_struct_test.rs:113:4
[INFO] [stdout]     |
[INFO] [stdout] 113 | fn combine_vecs<T: Clone>(v: Vec<T>, u: Vec<T>) -> impl Iterator<Item = T> {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `FILE_NAME` is never used
[INFO] [stdout]  --> rust_language/examples/c07_error_test.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | static FILE_NAME: &str = "hello.txt";
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file` is never used
[INFO] [stdout]   --> rust_language/examples/c07_error_test.rs:65:4
[INFO] [stdout]    |
[INFO] [stdout] 65 | fn read_username_from_file(name: &str) -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_simple` is never used
[INFO] [stdout]   --> rust_language/examples/c07_error_test.rs:81:4
[INFO] [stdout]    |
[INFO] [stdout] 81 | fn read_username_from_file_simple(name: &str) -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling autocxx-macro v0.25.0
[INFO] [stderr]     Checking function_name v0.2.3
[INFO] [stderr]     Checking hello_mod v0.1.0 (/opt/rustwide/workdir/module_test/hello_mod)
[INFO] [stdout] warning: function `hello` is never used
[INFO] [stdout]  --> module_test/hello_mod/src/hello_dir/hello_dir_2.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn hello() {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello_private` is never used
[INFO] [stdout]   --> module_test/hello_mod/src/hello_sub.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |         fn hello_private() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello` is never used
[INFO] [stdout]  --> module_test/hello_mod/src/hello_dir/hello_dir_2.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn hello() {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello_private` is never used
[INFO] [stdout]   --> module_test/hello_mod/src/hello_sub.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |         fn hello_private() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking autocxx v0.25.0
[INFO] [stderr]    Compiling autocxx-engine v0.25.0
[INFO] [stderr]    Compiling autocxx-build v0.25.0
[INFO] [stderr]    Compiling use_autocxx_lib v0.1.0 (/opt/rustwide/workdir/rust_with_c/use_autocxx_lib)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.32s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "4dc7ed88acb0d9d7a701e79edd39ac0816904bf63054f38c66ec67d59ec39b77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dc7ed88acb0d9d7a701e79edd39ac0816904bf63054f38c66ec67d59ec39b77", kill_on_drop: false }`
[INFO] [stdout] 4dc7ed88acb0d9d7a701e79edd39ac0816904bf63054f38c66ec67d59ec39b77