[INFO] cloning repository https://github.com/caoyx1990/LearnRustProject
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/caoyx1990/LearnRustProject" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaoyx1990%2FLearnRustProject", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaoyx1990%2FLearnRustProject'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d8766f700769d3d79b77e9fb370a4e83d7935224
[INFO] checking caoyx1990/LearnRustProject against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaoyx1990%2FLearnRustProject" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/caoyx1990/LearnRustProject on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/caoyx1990/LearnRustProject
[INFO] finished tweaking git repo https://github.com/caoyx1990/LearnRustProject
[INFO] tweaked toml for git repo https://github.com/caoyx1990/LearnRustProject written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/caoyx1990/LearnRustProject 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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7432d9e99c8868cd46edb7bd2aed32ec9c0a5cda7d94f0f5ba92334b14b2c269
[INFO] running `Command { std: "docker" "start" "-a" "7432d9e99c8868cd46edb7bd2aed32ec9c0a5cda7d94f0f5ba92334b14b2c269", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7432d9e99c8868cd46edb7bd2aed32ec9c0a5cda7d94f0f5ba92334b14b2c269", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7432d9e99c8868cd46edb7bd2aed32ec9c0a5cda7d94f0f5ba92334b14b2c269", kill_on_drop: false }`
[INFO] [stdout] 7432d9e99c8868cd46edb7bd2aed32ec9c0a5cda7d94f0f5ba92334b14b2c269
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ce05075a09a9835ffb16e7baf1e5b22de05336d1d5349bccd98e645ec2054080
[INFO] running `Command { std: "docker" "start" "-a" "ce05075a09a9835ffb16e7baf1e5b22de05336d1d5349bccd98e645ec2054080", kill_on_drop: false }`
[INFO] [stderr]     Checking LearnRustProject v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::net::IpAddr`
[INFO] [stdout]  --> src/001.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::net::IpAddr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::print_a_b`
[INFO] [stdout]    --> src/001.rs:247:9
[INFO] [stdout]     |
[INFO] [stdout] 247 |     use crate::print_a_b;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]    --> src/001.rs:246:1
[INFO] [stdout]     |
[INFO] [stdout] 246 | mod tests {
[INFO] [stdout]     | ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::net::IpAddr`
[INFO] [stdout]  --> src/001.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::net::IpAddr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/001.rs:263:34
[INFO] [stdout]     |
[INFO] [stdout] 263 | fn print_a_b(a: i32, b: char) -> (i32) {
[INFO] [stdout]     |                                  ^   ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 263 - fn print_a_b(a: i32, b: char) -> (i32) {
[INFO] [stdout] 263 + fn print_a_b(a: i32, b: char) -> i32 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/001.rs:263:34
[INFO] [stdout]     |
[INFO] [stdout] 263 | fn print_a_b(a: i32, b: char) -> (i32) {
[INFO] [stdout]     |                                  ^   ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 263 - fn print_a_b(a: i32, b: char) -> (i32) {
[INFO] [stdout] 263 + fn print_a_b(a: i32, b: char) -> i32 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/001.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let hello = String::from("你好");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/001.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let a: [i32; 5] = [1,2,3,4,5];
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/001.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let v: Vec<i32> = Vec::new();
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/001.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |     let v = vec![1,2,3];
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/001.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let hello = String::from("你好");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/001.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let a: [i32; 5] = [1,2,3,4,5];
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/001.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let v: Vec<i32> = Vec::new();
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/001.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |     let v = vec![1,2,3];
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `active`, `username`, `email`, and `age` are never read
[INFO] [stdout]    --> src/001.rs:272:5
[INFO] [stdout]     |
[INFO] [stdout] 271 | struct User {
[INFO] [stdout]     |        ---- fields in this struct
[INFO] [stdout] 272 |     active: bool,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 273 |     username: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 274 |     email: String,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 275 |     age: u64
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `User` 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 `active`, `username`, `email`, and `age` are never read
[INFO] [stdout]    --> src/001.rs:272:5
[INFO] [stdout]     |
[INFO] [stdout] 271 | struct User {
[INFO] [stdout]     |        ---- fields in this struct
[INFO] [stdout] 272 |     active: bool,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 273 |     username: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 274 |     email: String,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 275 |     age: u64
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `User` 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: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "ce05075a09a9835ffb16e7baf1e5b22de05336d1d5349bccd98e645ec2054080", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce05075a09a9835ffb16e7baf1e5b22de05336d1d5349bccd98e645ec2054080", kill_on_drop: false }`
[INFO] [stdout] ce05075a09a9835ffb16e7baf1e5b22de05336d1d5349bccd98e645ec2054080
[INFO] checking caoyx1990/LearnRustProject against try#36dbcaee1a55543dfc181be52a69d99ff46ff62f for pr-122960-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaoyx1990%2FLearnRustProject" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/caoyx1990/LearnRustProject on toolchain 36dbcaee1a55543dfc181be52a69d99ff46ff62f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/caoyx1990/LearnRustProject
[INFO] finished tweaking git repo https://github.com/caoyx1990/LearnRustProject
[INFO] tweaked toml for git repo https://github.com/caoyx1990/LearnRustProject written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/caoyx1990/LearnRustProject 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" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 517b21bea93b64aca413bcdf96d433d419868441a1d8e0079b2dafe138696c59
[INFO] running `Command { std: "docker" "start" "-a" "517b21bea93b64aca413bcdf96d433d419868441a1d8e0079b2dafe138696c59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "517b21bea93b64aca413bcdf96d433d419868441a1d8e0079b2dafe138696c59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "517b21bea93b64aca413bcdf96d433d419868441a1d8e0079b2dafe138696c59", kill_on_drop: false }`
[INFO] [stdout] 517b21bea93b64aca413bcdf96d433d419868441a1d8e0079b2dafe138696c59
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5a70b3f0b383e856a944d1fc4040b6dbfc03144dfdfa8f7048f7023a132f6f9b
[INFO] running `Command { std: "docker" "start" "-a" "5a70b3f0b383e856a944d1fc4040b6dbfc03144dfdfa8f7048f7023a132f6f9b", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]     Checking LearnRustProject v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/001.rs from 2021 edition to 2024
[INFO] [stderr]        Fixed src/001.rs (3 fixes)
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/001.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let hello = String::from("你好");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/001.rs:98:9
[INFO] [stdout]    |
[INFO] [stdout] 98 |     let a: [i32; 5] = [1,2,3,4,5];
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/001.rs:104:9
[INFO] [stdout]     |
[INFO] [stdout] 104 |     let v: Vec<i32> = Vec::new();
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/001.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let v = vec![1,2,3];
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `active`, `username`, `email`, and `age` are never read
[INFO] [stdout]    --> src/001.rs:271:5
[INFO] [stdout]     |
[INFO] [stdout] 270 | struct User {
[INFO] [stdout]     |        ---- fields in this struct
[INFO] [stdout] 271 |     active: bool,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 272 |     username: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 273 |     email: String,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 274 |     age: u64
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `User` 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: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `print_a_b` in this scope
[INFO] [stdout]    --> src/001.rs:250:22
[INFO] [stdout]     |
[INFO] [stdout] 250 |         let result = print_a_b(10, 'a');
[INFO] [stdout]     |                      ^^^^^^^^^ not found in this scope
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]     |
[INFO] [stdout] 248 +     use crate::print_a_b;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/001.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let hello = String::from("你好");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/001.rs:98:9
[INFO] [stdout]    |
[INFO] [stdout] 98 |     let a: [i32; 5] = [1,2,3,4,5];
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/001.rs:104:9
[INFO] [stdout]     |
[INFO] [stdout] 104 |     let v: Vec<i32> = Vec::new();
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/001.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let v = vec![1,2,3];
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `LearnRustProject` (bin "001" test) due to 2 previous errors; 4 warnings emitted
[INFO] [stderr] error: failed to migrate to next edition
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `cargo fix --edition --allow-no-vcs --allow-dirty --frozen --all --all-targets --message-format=json` (exit status: 101)
[INFO] running `Command { std: "docker" "inspect" "5a70b3f0b383e856a944d1fc4040b6dbfc03144dfdfa8f7048f7023a132f6f9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a70b3f0b383e856a944d1fc4040b6dbfc03144dfdfa8f7048f7023a132f6f9b", kill_on_drop: false }`
[INFO] [stdout] 5a70b3f0b383e856a944d1fc4040b6dbfc03144dfdfa8f7048f7023a132f6f9b