[INFO] cloning repository https://github.com/poype/StudyRust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/poype/StudyRust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpoype%2FStudyRust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpoype%2FStudyRust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 170bd5b1f742388b09756abb0e3622ae78a0f589
[INFO] checking poype/StudyRust against c397dae808f70caebab1fc4e11b3edf7e59f58c7 for pr-158759-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpoype%2FStudyRust" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/poype/StudyRust
[INFO] finished tweaking git repo https://github.com/poype/StudyRust
[INFO] tweaked toml for git repo https://github.com/poype/StudyRust written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/poype/StudyRust on toolchain c397dae808f70caebab1fc4e11b3edf7e59f58c7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c397dae808f70caebab1fc4e11b3edf7e59f58c7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/poype/StudyRust 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" "+c397dae808f70caebab1fc4e11b3edf7e59f58c7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3d5ced03c013a94a2f102a4510f48a6e9184255caf5fd8244f58017bde7f5210" "sleep" "infinity", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "59df5a8544f79c484ec06a05676ddd373434ef32201e5543e2bd430e6b17e0d9" "/opt/rustwide/cargo-home/bin/cargo" "+c397dae808f70caebab1fc4e11b3edf7e59f58c7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "59df5a8544f79c484ec06a05676ddd373434ef32201e5543e2bd430e6b17e0d9", kill_on_drop: false }`
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[INFO] [stdout] warning: unused variable: `option_ref_string`
[INFO] [stdout]  --> src/bin/test_as_ref.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let option_ref_string: Option<&String> = option_string.as_ref();
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_option_ref_string`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `option_ref_str`
[INFO] [stdout]   --> src/bin/test_as_ref.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let option_ref_str: Option<&str> = option_string.as_deref();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_option_ref_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `option_ref_box`
[INFO] [stdout]   --> src/bin/test_as_ref.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let option_ref_box: Option<&Box<i32>> = option_box.as_ref();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_option_ref_box`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `option_ref_box`
[INFO] [stdout]   --> src/bin/test_as_ref.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let option_ref_box: Option<&i32> = option_box.as_deref();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_option_ref_box`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `option_ref_vec`
[INFO] [stdout]   --> src/bin/test_as_ref.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let option_ref_vec: Option<&Vec<i32>> = option_vec.as_ref();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_option_ref_vec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `option_ref_slice`
[INFO] [stdout]   --> src/bin/test_as_ref.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let option_ref_slice: Option<&[i32]> = option_vec.as_deref();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_option_ref_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `age` is never read
[INFO] [stdout]   --> src/bin/test_drop.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Person {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 22 |     name: String,
[INFO] [stdout] 23 |     age: i32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Mutex` and `mpsc`
[INFO] [stdout]  --> src/bin/dyn.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::sync::{mpsc, Arc, Mutex};
[INFO] [stdout]   |                 ^^^^       ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `option_ref_string`
[INFO] [stdout]  --> src/bin/test_as_ref.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let option_ref_string: Option<&String> = option_string.as_ref();
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_option_ref_string`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `option_ref_str`
[INFO] [stdout]   --> src/bin/test_as_ref.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let option_ref_str: Option<&str> = option_string.as_deref();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_option_ref_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `option_ref_box`
[INFO] [stdout]   --> src/bin/test_as_ref.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let option_ref_box: Option<&Box<i32>> = option_box.as_ref();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_option_ref_box`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `option_ref_box`
[INFO] [stdout]   --> src/bin/test_as_ref.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let option_ref_box: Option<&i32> = option_box.as_deref();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_option_ref_box`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `option_ref_vec`
[INFO] [stdout]   --> src/bin/test_as_ref.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let option_ref_vec: Option<&Vec<i32>> = option_vec.as_ref();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_option_ref_vec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `option_ref_slice`
[INFO] [stdout]   --> src/bin/test_as_ref.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let option_ref_slice: Option<&[i32]> = option_vec.as_deref();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_option_ref_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Mutex` and `mpsc`
[INFO] [stdout]  --> src/bin/dyn.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::sync::{mpsc, Arc, Mutex};
[INFO] [stdout]   |                 ^^^^       ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Method` is never used
[INFO] [stdout]  --> src/bin/http_request/mod.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub enum Method {
[INFO] [stdout]   |          ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Version` is never used
[INFO] [stdout]   --> src/bin/http_request/mod.rs:11:10
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum Version {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Resource` is never used
[INFO] [stdout]   --> src/bin/http_request/mod.rs:18:10
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub enum Resource {
[INFO] [stdout]    |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `HttpRequest` is never constructed
[INFO] [stdout]   --> src/bin/http_request/mod.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct HttpRequest {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_req_line` is never used
[INFO] [stdout]   --> src/bin/http_request/mod.rs:86:4
[INFO] [stdout]    |
[INFO] [stdout] 86 | fn process_req_line(s: &str) -> (Method, Resource, Version) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_header_line` is never used
[INFO] [stdout]   --> src/bin/http_request/mod.rs:99:4
[INFO] [stdout]    |
[INFO] [stdout] 99 | fn process_header_line(s: &str) -> (String, String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `age` is never read
[INFO] [stdout]   --> src/bin/test_drop.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Person {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 22 |     name: String,
[INFO] [stdout] 23 |     age: i32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `V2_0` is never constructed
[INFO] [stdout]   --> src/bin/http_request/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum Version {
[INFO] [stdout]    |          ------- variant in this enum
[INFO] [stdout] 12 |     V1_1,
[INFO] [stdout] 13 |     V2_0,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Version` 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: fields `resource`, `headers`, and `msg_body` are never read
[INFO] [stdout]   --> src/bin/http_request/mod.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct HttpRequest {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 26 |     pub resource: Resource,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 27 |     pub headers: HashMap<String, String>,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 28 |     pub msg_body: String,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `HttpRequest` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 54.44s
[INFO] running `Command { std: "docker" "inspect" "59df5a8544f79c484ec06a05676ddd373434ef32201e5543e2bd430e6b17e0d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59df5a8544f79c484ec06a05676ddd373434ef32201e5543e2bd430e6b17e0d9", kill_on_drop: false }`
[INFO] [stdout] 59df5a8544f79c484ec06a05676ddd373434ef32201e5543e2bd430e6b17e0d9
