[INFO] cloning repository https://github.com/www6v/rustDemo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/www6v/rustDemo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwww6v%2FrustDemo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwww6v%2FrustDemo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b93b77f0b7367d16ea1a57f6b5a17ffc641889a5
[INFO] checking www6v/rustDemo against master#779e19d8baa3e3625bd4fc5c85cbb2ad47b43155 for pr-147589-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwww6v%2FrustDemo" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/www6v/rustDemo
[INFO] finished tweaking git repo https://github.com/www6v/rustDemo
[INFO] tweaked toml for git repo https://github.com/www6v/rustDemo written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/www6v/rustDemo on toolchain 779e19d8baa3e3625bd4fc5c85cbb2ad47b43155
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/www6v/rustDemo 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" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded futures-core v0.3.19
[INFO] [stderr]   Downloaded binascii v0.1.4
[INFO] [stderr]   Downloaded devise v0.3.1
[INFO] [stderr]   Downloaded pear_codegen v0.2.3
[INFO] [stderr]   Downloaded base-x v0.2.8
[INFO] [stderr]   Downloaded ubyte v0.10.1
[INFO] [stderr]   Downloaded serde_derive v1.0.132
[INFO] [stderr]   Downloaded ref-cast-impl v1.0.6
[INFO] [stderr]   Downloaded futures-sink v0.3.19
[INFO] [stderr]   Downloaded devise_codegen v0.3.1
[INFO] [stderr]   Downloaded futures-task v0.3.19
[INFO] [stderr]   Downloaded ref-cast v1.0.6
[INFO] [stderr]   Downloaded ferris-says v0.2.1
[INFO] [stderr]   Downloaded futures-io v0.3.19
[INFO] [stderr]   Downloaded tracing-attributes v0.1.18
[INFO] [stderr]   Downloaded stable-pattern v0.1.0
[INFO] [stderr]   Downloaded pear v0.2.3
[INFO] [stderr]   Downloaded string_cache v0.8.2
[INFO] [stderr]   Downloaded inlinable_string v0.1.15
[INFO] [stderr]   Downloaded futures-executor v0.3.19
[INFO] [stderr]   Downloaded devise_core v0.3.1
[INFO] [stderr]   Downloaded serde v1.0.132
[INFO] [stderr]   Downloaded multer v2.0.2
[INFO] [stderr]   Downloaded smallvec v0.4.5
[INFO] [stderr]   Downloaded spin v0.9.2
[INFO] [stderr]   Downloaded security-framework-sys v2.4.2
[INFO] [stderr]   Downloaded openssl-sys v0.9.72
[INFO] [stderr]   Downloaded native-tls v0.2.8
[INFO] [stderr]   Downloaded futures-channel v0.3.19
[INFO] [stderr]   Downloaded generator v0.7.0
[INFO] [stderr]   Downloaded futures-macro v0.3.19
[INFO] [stderr]   Downloaded http-body v0.4.4
[INFO] [stderr]   Downloaded tracing-core v0.1.21
[INFO] [stderr]   Downloaded textwrap v0.13.4
[INFO] [stderr]   Downloaded futures v0.3.19
[INFO] [stderr]   Downloaded cookie v0.15.1
[INFO] [stderr]   Downloaded socket2 v0.4.2
[INFO] [stderr]   Downloaded loom v0.5.4
[INFO] [stderr]   Downloaded html2md v0.2.13
[INFO] [stderr]   Downloaded tracing v0.1.29
[INFO] [stderr]   Downloaded security-framework v2.4.2
[INFO] [stderr]   Downloaded rocket_codegen v0.5.0-rc.1
[INFO] [stderr]   Downloaded serde_json v1.0.73
[INFO] [stderr]   Downloaded http v0.2.6
[INFO] [stderr]   Downloaded h2 v0.3.9
[INFO] [stderr]   Downloaded reqwest v0.11.8
[INFO] [stderr]   Downloaded futures-util v0.3.19
[INFO] [stderr]   Downloaded hyper v0.14.16
[INFO] [stderr]   Downloaded tracing-subscriber v0.3.5
[INFO] [stderr]   Downloaded openssl v0.10.38
[INFO] [stderr]   Downloaded rocket v0.5.0-rc.1
[INFO] [stderr]   Downloaded figment v0.10.6
[INFO] [stderr]   Downloaded rocket_http v0.5.0-rc.1
[INFO] [stderr]   Downloaded state v0.5.2
[INFO] [stderr]   Downloaded siphasher v0.3.7
[INFO] [stderr]   Downloaded uncased v0.9.6
[INFO] [stderr]   Downloaded rustversion v1.0.6
[INFO] [stderr]   Downloaded tracing-log v0.1.2
[INFO] [stderr]   Downloaded tokio v1.15.0
[INFO] [stderr]   Downloaded encoding_rs v0.8.30
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3fb4e694542fa89a8eb87569598b77ac5a0018f094d372d3e47038d3669514ce
[INFO] running `Command { std: "docker" "start" "-a" "3fb4e694542fa89a8eb87569598b77ac5a0018f094d372d3e47038d3669514ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3fb4e694542fa89a8eb87569598b77ac5a0018f094d372d3e47038d3669514ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3fb4e694542fa89a8eb87569598b77ac5a0018f094d372d3e47038d3669514ce", kill_on_drop: false }`
[INFO] [stdout] 3fb4e694542fa89a8eb87569598b77ac5a0018f094d372d3e47038d3669514ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c0ea12d3b2fc3e4c1129b6922f7a4326687f980d9f69acc316239e29350db009
[INFO] running `Command { std: "docker" "start" "-a" "c0ea12d3b2fc3e4c1129b6922f7a4326687f980d9f69acc316239e29350db009", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling syn v1.0.84
[INFO] [stderr]    Compiling futures-core v0.3.19
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling serde_derive v1.0.132
[INFO] [stderr]    Compiling serde v1.0.132
[INFO] [stderr]     Checking smallvec v1.7.0
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]     Checking lock_api v0.4.5
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling standback v0.2.17
[INFO] [stderr]    Compiling quote v1.0.14
[INFO] [stderr]    Compiling yansi v0.5.0
[INFO] [stderr]    Compiling proc-macro2-diagnostics v0.9.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]     Checking once_cell v1.9.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling futures-task v0.3.19
[INFO] [stderr]     Checking futures-sink v0.3.19
[INFO] [stderr]    Compiling futures-channel v0.3.19
[INFO] [stderr]    Compiling httparse v1.5.1
[INFO] [stderr]    Compiling futures-util v0.3.19
[INFO] [stderr]    Compiling siphasher v0.3.7
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling const_fn v0.4.9
[INFO] [stderr]    Compiling pin-project-lite v0.2.8
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]     Checking futures-io v0.3.19
[INFO] [stderr]    Compiling pkg-config v0.3.24
[INFO] [stderr]    Compiling time v0.2.27
[INFO] [stderr]    Compiling bytes v1.1.0
[INFO] [stderr]     Checking http v0.2.6
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]     Checking new_debug_unreachable v1.0.4
[INFO] [stderr]     Checking tracing-core v0.1.21
[INFO] [stderr]    Compiling cookie v0.15.1
[INFO] [stderr]    Compiling itoa v1.0.1
[INFO] [stderr]    Compiling ref-cast v1.0.6
[INFO] [stderr]     Checking mac v0.1.1
[INFO] [stderr]     Checking futf v0.1.4
[INFO] [stderr]    Compiling mio v0.7.14
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]     Checking tracing v0.1.29
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]     Checking utf-8 v0.7.6
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling tokio v1.15.0
[INFO] [stderr]    Compiling openssl v0.10.38
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]     Checking tendril v0.4.2
[INFO] [stderr]    Compiling openssl-sys v0.9.72
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking socket2 v0.4.2
[INFO] [stderr]     Checking phf v0.8.0
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling uncased v0.9.6
[INFO] [stderr]    Compiling encoding_rs v0.8.30
[INFO] [stderr]     Checking matches v0.1.9
[INFO] [stderr]    Compiling try-lock v0.2.3
[INFO] [stderr]    Compiling native-tls v0.2.8
[INFO] [stderr]    Compiling slab v0.4.5
[INFO] [stderr]     Checking httpdate v1.0.2
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]     Checking tinyvec v1.5.1
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking inlinable_string v0.1.15
[INFO] [stderr]    Compiling tower-service v0.3.1
[INFO] [stderr]     Checking openssl-probe v0.1.4
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking form_urlencoded v1.0.1
[INFO] [stderr]    Compiling stable-pattern v0.1.0
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]    Compiling atomic v0.5.1
[INFO] [stderr]    Compiling multer v2.0.2
[INFO] [stderr]    Compiling figment v0.10.6
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling mime v0.3.16
[INFO] [stderr]    Compiling state v0.5.2
[INFO] [stderr]    Compiling serde_json v1.0.73
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking unicode-bidi v0.3.7
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]    Compiling rocket v0.5.0-rc.1
[INFO] [stderr]     Checking spin v0.9.2
[INFO] [stderr]     Checking smawk v0.3.1
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking http-body v0.4.4
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling anyhow v1.0.52
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking ipnet v2.3.1
[INFO] [stderr]     Checking binascii v0.1.4
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking smallvec v0.4.5
[INFO] [stderr]     Checking textwrap v0.13.4
[INFO] [stderr]    Compiling markup5ever v0.10.1
[INFO] [stderr]     Checking ferris-says v0.2.1
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]    Compiling tokio-util v0.6.9
[INFO] [stderr]    Compiling h2 v0.3.9
[INFO] [stderr]    Compiling devise_core v0.3.1
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling futures-macro v0.3.19
[INFO] [stderr]    Compiling time-macros-impl v0.1.2
[INFO] [stderr]    Compiling pear_codegen v0.2.3
[INFO] [stderr]    Compiling ref-cast-impl v1.0.6
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]    Compiling async-stream-impl v0.3.2
[INFO] [stderr]    Compiling async-trait v0.1.52
[INFO] [stderr]     Checking async-stream v0.3.2
[INFO] [stderr]     Checking pear v0.2.3
[INFO] [stderr]    Compiling devise_codegen v0.3.1
[INFO] [stderr]    Compiling time-macros v0.1.1
[INFO] [stderr]    Compiling devise v0.3.1
[INFO] [stderr]    Compiling hyper v0.14.16
[INFO] [stderr]     Checking futures-executor v0.3.19
[INFO] [stderr]     Checking futures v0.3.19
[INFO] [stderr]    Compiling rocket_http v0.5.0-rc.1
[INFO] [stderr]     Checking tokio-native-tls v0.3.0
[INFO] [stderr]     Checking tokio-stream v0.1.8
[INFO] [stderr]     Checking string_cache v0.8.2
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking ubyte v0.10.1
[INFO] [stderr]    Compiling rocket_codegen v0.5.0-rc.1
[INFO] [stderr]     Checking xml5ever v0.16.2
[INFO] [stderr]     Checking markup5ever_rcdom v0.1.0
[INFO] [stderr]     Checking html2md v0.2.13
[INFO] [stderr]     Checking hyper-tls v0.5.0
[INFO] [stderr]     Checking reqwest v0.11.8
[INFO] [stderr]     Checking hello-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/base/trait_mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::rc::Rc;
[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 import: `std::rc::Rc`
[INFO] [stdout]  --> src/base/trait_mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]  --> src/base/rc.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Node { 
[INFO] [stdout]   |        ---- field in this struct
[INFO] [stdout] 6 | id: usize, 
[INFO] [stdout]   | ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Node` 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 `age` and `lang` are never read
[INFO] [stdout]   --> src/base/trait_mod.rs:13:3
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Developer {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 12 |   name: String,
[INFO] [stdout] 13 |   age: u8,
[INFO] [stdout]    |   ^^^
[INFO] [stdout] 14 |   lang: Language
[INFO] [stdout]    |   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Developer` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/base/trait_mod.rs:107:4
[INFO] [stdout]     |
[INFO] [stdout] 107 |    drop(buf) 
[INFO] [stdout]     |    ^^^^^---^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `RawBuffer`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let mut cb_ctx = Base::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: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         Base::fetch_with_error();  
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 24 |         let _ = Base::fetch_with_error();  
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hello_rust::base::rc::rc_test`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use hello_rust::base::rc::rc_test;
[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 import: `hello_rust::base::trait_mod::copy_trait_test`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use hello_rust::base::trait_mod::copy_trait_test;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hello_rust::base::trait_mod::drop_trait_test`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use hello_rust::base::trait_mod::drop_trait_test;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hello_rust::base::trait_mod::refcell_is_send`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use hello_rust::base::trait_mod::refcell_is_send;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hello_rust::base::trait_mod::arc_mutext_is_send_sync`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use hello_rust::base::trait_mod::arc_mutext_is_send_sync;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hello_rust::base::base::Base`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use hello_rust::base::base::Base;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]  --> src/base/rc.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Node { 
[INFO] [stdout]   |        ---- field in this struct
[INFO] [stdout] 6 | id: usize, 
[INFO] [stdout]   | ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Node` 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 `age` and `lang` are never read
[INFO] [stdout]   --> src/base/trait_mod.rs:13:3
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Developer {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 12 |   name: String,
[INFO] [stdout] 13 |   age: u8,
[INFO] [stdout]    |   ^^^
[INFO] [stdout] 14 |   lang: Language
[INFO] [stdout]    |   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Developer` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/base/trait_mod.rs:107:4
[INFO] [stdout]     |
[INFO] [stdout] 107 |    drop(buf) 
[INFO] [stdout]     |    ^^^^^---^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `RawBuffer`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 02s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: html5ever v0.25.1, ubyte v0.10.1, xml5ever v0.16.2
[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" "c0ea12d3b2fc3e4c1129b6922f7a4326687f980d9f69acc316239e29350db009", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0ea12d3b2fc3e4c1129b6922f7a4326687f980d9f69acc316239e29350db009", kill_on_drop: false }`
[INFO] [stdout] c0ea12d3b2fc3e4c1129b6922f7a4326687f980d9f69acc316239e29350db009
