[INFO] cloning repository https://github.com/kingstar718/rust_learning [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kingstar718/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning'... [INFO] [stderr] error: copy-fd: write returned: No space left on device [INFO] [stderr] fatal: cannot copy '/usr/share/git-core/templates/hooks/prepare-commit-msg.sample' to '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning/hooks/prepare-commit-msg.sample': No space left on device [WARN] Retrying crate fetch in 3 seconds (attempt 1) [INFO] cloning repository https://github.com/kingstar718/rust_learning [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kingstar718/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning'... [INFO] [stderr] error: copy-fd: write returned: No space left on device [INFO] [stderr] fatal: cannot copy '/usr/share/git-core/templates/hooks/pre-rebase.sample' to '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning/hooks/pre-rebase.sample': No space left on device [WARN] Retrying crate fetch in 3 seconds (attempt 2) [INFO] cloning repository https://github.com/kingstar718/rust_learning [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kingstar718/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning'... [INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning: No space left on device [WARN] Retrying crate fetch in 3 seconds (attempt 3) [INFO] cloning repository https://github.com/kingstar718/rust_learning [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kingstar718/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning'... [INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning: No space left on device [WARN] Retrying crate fetch in 3 seconds (attempt 4) [INFO] cloning repository https://github.com/kingstar718/rust_learning [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kingstar718/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning'... [INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning: No space left on device [WARN] Retrying crate fetch in 3 seconds (attempt 5) [INFO] cloning repository https://github.com/kingstar718/rust_learning [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kingstar718/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning'... [INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning: No space left on device [WARN] Retrying crate fetch in 3 seconds (attempt 6) [INFO] cloning repository https://github.com/kingstar718/rust_learning [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kingstar718/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning'... [INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning: No space left on device [WARN] Retrying crate fetch in 3 seconds (attempt 7) [INFO] cloning repository https://github.com/kingstar718/rust_learning [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kingstar718/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning'... [INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning: No space left on device [WARN] Retrying crate fetch in 3 seconds (attempt 8) [INFO] cloning repository https://github.com/kingstar718/rust_learning [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kingstar718/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning'... [INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning: No space left on device [WARN] Retrying crate fetch in 3 seconds (attempt 9) [INFO] cloning repository https://github.com/kingstar718/rust_learning [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kingstar718/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning'... [INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning: No space left on device [WARN] Retrying crate fetch in 3 seconds (attempt 10) [INFO] cloning repository https://github.com/kingstar718/rust_learning [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kingstar718/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning'... [INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning: No space left on device [WARN] Retrying crate fetch in 3 seconds (attempt 11) [INFO] cloning repository https://github.com/kingstar718/rust_learning [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kingstar718/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning'... [INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning: No space left on device [WARN] Retrying crate fetch in 3 seconds (attempt 12) [INFO] cloning repository https://github.com/kingstar718/rust_learning [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kingstar718/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning'... [INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning: No space left on device [WARN] Retrying crate fetch in 3 seconds (attempt 13) [INFO] cloning repository https://github.com/kingstar718/rust_learning [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kingstar718/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 38e8e6b3207c9954cd2c0ccae45ec8eba3342eb9 [INFO] checking kingstar718/rust_learning against master#336209eef13882bd1e211b24779584cb7ef911eb for pr-129249 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkingstar718%2Frust_learning" "/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/kingstar718/rust_learning on toolchain 336209eef13882bd1e211b24779584cb7ef911eb [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+336209eef13882bd1e211b24779584cb7ef911eb" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/kingstar718/rust_learning [INFO] finished tweaking git repo https://github.com/kingstar718/rust_learning [INFO] tweaked toml for git repo https://github.com/kingstar718/rust_learning written to /workspace/builds/worker-2-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/kingstar718/rust_learning 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" "+336209eef13882bd1e211b24779584cb7ef911eb" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+336209eef13882bd1e211b24779584cb7ef911eb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 054b2c2d401901a5027bb716b7aa41a2e1f1777c0ccb4591cf961c37eb620f8e [INFO] running `Command { std: "docker" "start" "-a" "054b2c2d401901a5027bb716b7aa41a2e1f1777c0ccb4591cf961c37eb620f8e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "054b2c2d401901a5027bb716b7aa41a2e1f1777c0ccb4591cf961c37eb620f8e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "054b2c2d401901a5027bb716b7aa41a2e1f1777c0ccb4591cf961c37eb620f8e", kill_on_drop: false }` [INFO] [stdout] 054b2c2d401901a5027bb716b7aa41a2e1f1777c0ccb4591cf961c37eb620f8e [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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+336209eef13882bd1e211b24779584cb7ef911eb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 799d19837d8c469c8cc7995548cc64c120e86aa20ea728f5c5530d6e5d51c953 [INFO] running `Command { std: "docker" "start" "-a" "799d19837d8c469c8cc7995548cc64c120e86aa20ea728f5c5530d6e5d51c953", kill_on_drop: false }` [INFO] [stderr] Checking rust_learning v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused imports: `string_delete`, `string_push`, and `string_utf_8` [INFO] [stdout] --> src/string_operate/test.rs:1:29 [INFO] [stdout] | [INFO] [stdout] 1 | use crate::string_operate::{string_delete, string_push, string_utf_8}; [INFO] [stdout] | ^^^^^^^^^^^^^ ^^^^^^^^^^^ ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `attach_tuple`, `match_tuple`, and `use_tuple_return` [INFO] [stdout] --> src/tuple_demo/test.rs:1:25 [INFO] [stdout] | [INFO] [stdout] 1 | use crate::tuple_demo::{attach_tuple, match_tuple, use_tuple_return}; [INFO] [stdout] | ^^^^^^^^^^^^ ^^^^^^^^^^^ ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `create_file`, `create_user`, and `struct_display` [INFO] [stdout] --> src/struct_demo/test.rs:1:26 [INFO] [stdout] | [INFO] [stdout] 1 | use crate::struct_demo::{create_file, create_user, struct_display}; [INFO] [stdout] | ^^^^^^^^^^^ ^^^^^^^^^^^ ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `crate::method_demo::get_radius` [INFO] [stdout] --> src/method_demo/test.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use crate::method_demo::get_radius; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `crate::generics_demo::generics_demo::add` [INFO] [stdout] --> src/generics_demo/test.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use crate::generics_demo::generics_demo::add; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `Summary`, `display_array2`, `display_array`, `get_point_x`, and `largest` [INFO] [stdout] --> src/generics_demo/test.rs:2:28 [INFO] [stdout] | [INFO] [stdout] 2 | use crate::generics_demo::{display_array, display_array2, get_point_x, largest, Summary}; [INFO] [stdout] | ^^^^^^^^^^^^^ ^^^^^^^^^^^^^^ ^^^^^^^^^^^ ^^^^^^^ ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `Post` and `Weibo` [INFO] [stdout] --> src/generics_demo/test.rs:3:40 [INFO] [stdout] | [INFO] [stdout] 3 | use crate::generics_demo::trait_demo::{Post, Weibo}; [INFO] [stdout] | ^^^^ ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `batch_use`, `create_hash_map`, `create_vec`, `get_from_hash_map`, `hash_map_life_time`, `read_vec`, `trait_diff_vec`, and `update_hash_map` [INFO] [stdout] --> src/collect_demo/test.rs:1:27 [INFO] [stdout] | [INFO] [stdout] 1 | ...demo::{batch_use, create_hash_map, create_vec, get_from_hash_map, hash_map_life_time, read_vec, trait_diff_vec, update_hash_map}; [INFO] [stdout] | ^^^^^^^^^ ^^^^^^^^^^^^^^^ ^^^^^^^^^^ ^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^ ^^^^^^^^ ^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `fs` [INFO] [stdout] --> src/return_error_demo/return_error_demo.rs:2:11 [INFO] [stdout] | [INFO] [stdout] 2 | use std::{fs, io}; [INFO] [stdout] | ^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `crate::return_error_demo::read_username_from_file` [INFO] [stdout] --> src/return_error_demo/test.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use crate::return_error_demo::read_username_from_file; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `string_delete` [INFO] [stdout] --> src/string_operate/test.rs:1:29 [INFO] [stdout] | [INFO] [stdout] 1 | use crate::string_operate::{string_delete, string_push, string_utf_8}; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `fs` [INFO] [stdout] --> src/return_error_demo/return_error_demo.rs:2:11 [INFO] [stdout] | [INFO] [stdout] 2 | use std::{fs, io}; [INFO] [stdout] | ^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `string_2` [INFO] [stdout] --> src/string_demo/string_demo.rs:31:9 [INFO] [stdout] | [INFO] [stdout] 31 | let string_2 = "hello world".to_string(); [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_string_2` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s1` [INFO] [stdout] --> src/string_demo/string_demo.rs:49:9 [INFO] [stdout] | [INFO] [stdout] 49 | let s1 = String::from("hello"); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/tuple_demo/tuple_demo.rs:4:10 [INFO] [stdout] | [INFO] [stdout] 4 | let (x, y, z) = tup; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `z` [INFO] [stdout] --> src/tuple_demo/tuple_demo.rs:4:16 [INFO] [stdout] | [INFO] [stdout] 4 | let (x, y, z) = tup; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_z` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `black` [INFO] [stdout] --> src/struct_demo/struct_demo.rs:64:9 [INFO] [stdout] | [INFO] [stdout] 64 | let black = Color(0, 0, 0); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_black` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `origin` [INFO] [stdout] --> src/struct_demo/struct_demo.rs:65:9 [INFO] [stdout] | [INFO] [stdout] 65 | let origin = Point(0, 0, 0); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `subject` [INFO] [stdout] --> src/struct_demo/struct_demo.rs:73:9 [INFO] [stdout] | [INFO] [stdout] 73 | let subject = AlwaysEqual; [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subject` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `first` [INFO] [stdout] --> src/collect_demo/collect_demo.rs:36:9 [INFO] [stdout] | [INFO] [stdout] 36 | let first = &v[0]; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_first` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `string_2` [INFO] [stdout] --> src/string_demo/string_demo.rs:31:9 [INFO] [stdout] | [INFO] [stdout] 31 | let string_2 = "hello world".to_string(); [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_string_2` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s1` [INFO] [stdout] --> src/string_demo/string_demo.rs:49:9 [INFO] [stdout] | [INFO] [stdout] 49 | let s1 = String::from("hello"); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/tuple_demo/tuple_demo.rs:4:10 [INFO] [stdout] | [INFO] [stdout] 4 | let (x, y, z) = tup; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `z` [INFO] [stdout] --> src/tuple_demo/tuple_demo.rs:4:16 [INFO] [stdout] | [INFO] [stdout] 4 | let (x, y, z) = tup; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_z` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `string_utf_8` is never used [INFO] [stdout] --> src/string_operate/string_operate.rs:97:8 [INFO] [stdout] | [INFO] [stdout] 97 | pub fn string_utf_8() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `match_tuple` is never used [INFO] [stdout] --> src/tuple_demo/tuple_demo.rs:2:8 [INFO] [stdout] | [INFO] [stdout] 2 | pub fn match_tuple() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `attach_tuple` is never used [INFO] [stdout] --> src/tuple_demo/tuple_demo.rs:9:8 [INFO] [stdout] | [INFO] [stdout] 9 | pub fn attach_tuple() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `use_tuple_return` is never used [INFO] [stdout] --> src/tuple_demo/tuple_demo.rs:18:8 [INFO] [stdout] | [INFO] [stdout] 18 | pub fn use_tuple_return() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `calculate_length` is never used [INFO] [stdout] --> src/tuple_demo/tuple_demo.rs:24:4 [INFO] [stdout] | [INFO] [stdout] 24 | fn calculate_length(s: String) -> (String, usize) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `User` is never constructed [INFO] [stdout] --> src/struct_demo/struct_demo.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | struct User { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `create_user` is never used [INFO] [stdout] --> src/struct_demo/struct_demo.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 8 | pub fn create_user() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `build_user` is never used [INFO] [stdout] --> src/struct_demo/struct_demo.rs:31:4 [INFO] [stdout] | [INFO] [stdout] 31 | fn build_user(email: String, username: String) -> User { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `File` is never constructed [INFO] [stdout] --> src/struct_demo/struct_demo.rs:42:8 [INFO] [stdout] | [INFO] [stdout] 42 | struct File { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `create_file` is never used [INFO] [stdout] --> src/struct_demo/struct_demo.rs:47:8 [INFO] [stdout] | [INFO] [stdout] 47 | pub fn create_file() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `tuple_struct` is never used [INFO] [stdout] --> src/struct_demo/struct_demo.rs:60:8 [INFO] [stdout] | [INFO] [stdout] 60 | pub fn tuple_struct() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `unit_like_struct` is never used [INFO] [stdout] --> src/struct_demo/struct_demo.rs:70:8 [INFO] [stdout] | [INFO] [stdout] 70 | pub fn unit_like_struct() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `User2` is never constructed [INFO] [stdout] --> src/struct_demo/struct_demo.rs:84:8 [INFO] [stdout] | [INFO] [stdout] 84 | struct User2<'a> { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `struct_display` is never used [INFO] [stdout] --> src/struct_demo/struct_demo.rs:95:8 [INFO] [stdout] | [INFO] [stdout] 95 | pub fn struct_display() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Circle` is never constructed [INFO] [stdout] --> src/method_demo/method_demo.rs:1:12 [INFO] [stdout] | [INFO] [stdout] 1 | pub struct Circle { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new`, `area`, and `radius` are never used [INFO] [stdout] --> src/method_demo/method_demo.rs:14:8 [INFO] [stdout] | [INFO] [stdout] 7 | impl Circle { [INFO] [stdout] | ----------- associated items in this implementation [INFO] [stdout] ... [INFO] [stdout] 14 | fn new(x: f64, y: f64, radius: f64) -> Circle { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 23 | fn area(&self) -> f64 { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 32 | pub fn radius(&self) -> f64 { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `can_hold` is never used [INFO] [stdout] --> src/method_demo/method_demo.rs:51:8 [INFO] [stdout] | [INFO] [stdout] 50 | impl Circle { [INFO] [stdout] | ----------- method in this implementation [INFO] [stdout] 51 | fn can_hold(&self, other: &Circle) -> bool { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `get_radius` is never used [INFO] [stdout] --> src/method_demo/method_demo.rs:56:8 [INFO] [stdout] | [INFO] [stdout] 56 | pub fn get_radius() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `call` is never used [INFO] [stdout] --> src/method_demo/method_demo.rs:71:8 [INFO] [stdout] | [INFO] [stdout] 70 | impl Message { [INFO] [stdout] | ------------ method in this implementation [INFO] [stdout] 71 | fn call(&self) { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `largest` is never used [INFO] [stdout] --> src/generics_demo/generics_demo.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | pub fn largest(list: &[T]) -> T { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `add` is never used [INFO] [stdout] --> src/generics_demo/generics_demo.rs:12:8 [INFO] [stdout] | [INFO] [stdout] 12 | pub fn add>(a: T, b: T) -> T { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Point` is never constructed [INFO] [stdout] --> src/generics_demo/generics_demo.rs:17:8 [INFO] [stdout] | [INFO] [stdout] 17 | struct Point { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `x` is never used [INFO] [stdout] --> src/generics_demo/generics_demo.rs:24:8 [INFO] [stdout] | [INFO] [stdout] 23 | impl Point { [INFO] [stdout] | ---------------- method in this implementation [INFO] [stdout] 24 | fn x(&self) -> &T { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `get_point_x` is never used [INFO] [stdout] --> src/generics_demo/generics_demo.rs:29:8 [INFO] [stdout] | [INFO] [stdout] 29 | pub fn get_point_x() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `display_array` is never used [INFO] [stdout] --> src/generics_demo/generics_demo.rs:38:8 [INFO] [stdout] | [INFO] [stdout] 38 | pub fn display_array(arr: &[T]) { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `display_array2` is never used [INFO] [stdout] --> src/generics_demo/generics_demo.rs:43:8 [INFO] [stdout] | [INFO] [stdout] 43 | pub fn display_array2(arr: [T; N]) { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `summarize` is never used [INFO] [stdout] --> src/generics_demo/trait_demo.rs:5:8 [INFO] [stdout] | [INFO] [stdout] 4 | pub trait Summary { [INFO] [stdout] | ------- method in this trait [INFO] [stdout] 5 | fn summarize(&self) -> String; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `content` is never read [INFO] [stdout] --> src/generics_demo/trait_demo.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 9 | pub struct Post { [INFO] [stdout] | ---- field in this struct [INFO] [stdout] ... [INFO] [stdout] 14 | pub content: String, // 内容 [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify` is never used [INFO] [stdout] --> src/generics_demo/trait_demo.rs:46:8 [INFO] [stdout] | [INFO] [stdout] 46 | pub fn notify(item: &impl Summary) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `create_vec` is never used [INFO] [stdout] --> src/collect_demo/collect_demo.rs:2:8 [INFO] [stdout] | [INFO] [stdout] 2 | pub fn create_vec() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_vec` is never used [INFO] [stdout] --> src/collect_demo/collect_demo.rs:17:8 [INFO] [stdout] | [INFO] [stdout] 17 | pub fn read_vec() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `batch_use` is never used [INFO] [stdout] --> src/collect_demo/collect_demo.rs:33:8 [INFO] [stdout] | [INFO] [stdout] 33 | pub fn batch_use() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `trait_diff_vec` is never used [INFO] [stdout] --> src/collect_demo/collect_demo.rs:49:8 [INFO] [stdout] | [INFO] [stdout] 49 | pub fn trait_diff_vec() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `create_hash_map` is never used [INFO] [stdout] --> src/collect_demo/hash_map_demo.rs:3:8 [INFO] [stdout] | [INFO] [stdout] 3 | pub fn create_hash_map() { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `hash_map_life_time` is never used [INFO] [stdout] --> src/collect_demo/hash_map_demo.rs:26:8 [INFO] [stdout] | [INFO] [stdout] 26 | pub fn hash_map_life_time() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `get_from_hash_map` is never used [INFO] [stdout] --> src/collect_demo/hash_map_demo.rs:47:8 [INFO] [stdout] | [INFO] [stdout] 47 | pub fn get_from_hash_map() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `update_hash_map` is never used [INFO] [stdout] --> src/collect_demo/hash_map_demo.rs:68:8 [INFO] [stdout] | [INFO] [stdout] 68 | pub fn update_hash_map() { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `black` [INFO] [stdout] --> src/struct_demo/struct_demo.rs:64:9 [INFO] [stdout] | [INFO] [stdout] 64 | let black = Color(0, 0, 0); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_black` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file` is never used [INFO] [stdout] --> src/return_error_demo/return_error_demo.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 8 | pub fn read_username_from_file() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `short_handle` is never used [INFO] [stdout] --> src/return_error_demo/return_error_demo.rs:16:8 [INFO] [stdout] | [INFO] [stdout] 16 | pub fn short_handle() -> Result{ [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `origin` [INFO] [stdout] --> src/struct_demo/struct_demo.rs:65:9 [INFO] [stdout] | [INFO] [stdout] 65 | let origin = Point(0, 0, 0); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `first` is never used [INFO] [stdout] --> src/return_error_demo/return_error_demo.rs:23:8 [INFO] [stdout] | [INFO] [stdout] 23 | pub fn first(arr: &[i32]) -> Option{ [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `last_char_of_first_line` is never used [INFO] [stdout] --> src/return_error_demo/return_error_demo.rs:30:4 [INFO] [stdout] | [INFO] [stdout] 30 | fn last_char_of_first_line(text: &str) -> Option { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `try_demo` is never used [INFO] [stdout] --> src/return_error_demo/return_error_demo.rs:44:8 [INFO] [stdout] | [INFO] [stdout] 44 | pub fn try_demo() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `subject` [INFO] [stdout] --> src/struct_demo/struct_demo.rs:73:9 [INFO] [stdout] | [INFO] [stdout] 73 | let subject = AlwaysEqual; [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subject` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `first` [INFO] [stdout] --> src/collect_demo/collect_demo.rs:36:9 [INFO] [stdout] | [INFO] [stdout] 36 | let first = &v[0]; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_first` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `active`, `username`, and `sign_in_count` are never read [INFO] [stdout] --> src/struct_demo/struct_demo.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 1 | struct User { [INFO] [stdout] | ---- fields in this struct [INFO] [stdout] 2 | active: bool, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] 3 | username: String, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] 4 | email: String, [INFO] [stdout] 5 | sign_in_count: u64, [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `tuple_struct` is never used [INFO] [stdout] --> src/struct_demo/struct_demo.rs:60:8 [INFO] [stdout] | [INFO] [stdout] 60 | pub fn tuple_struct() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `unit_like_struct` is never used [INFO] [stdout] --> src/struct_demo/struct_demo.rs:70:8 [INFO] [stdout] | [INFO] [stdout] 70 | pub fn unit_like_struct() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `User2` is never constructed [INFO] [stdout] --> src/struct_demo/struct_demo.rs:84:8 [INFO] [stdout] | [INFO] [stdout] 84 | struct User2<'a> { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `width` and `height` are never read [INFO] [stdout] --> src/struct_demo/struct_demo.rs:99:9 [INFO] [stdout] | [INFO] [stdout] 98 | struct Rectangle { [INFO] [stdout] | --------- fields in this struct [INFO] [stdout] 99 | width: u32, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 100 | height: u32, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `x` and `y` are never read [INFO] [stdout] --> src/method_demo/method_demo.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 1 | pub struct Circle { [INFO] [stdout] | ------ fields in this struct [INFO] [stdout] 2 | x: f64, [INFO] [stdout] | ^ [INFO] [stdout] 3 | y: f64, [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `area` is never used [INFO] [stdout] --> src/method_demo/method_demo.rs:23:8 [INFO] [stdout] | [INFO] [stdout] 7 | impl Circle { [INFO] [stdout] | ----------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 23 | fn area(&self) -> f64 { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `can_hold` is never used [INFO] [stdout] --> src/method_demo/method_demo.rs:51:8 [INFO] [stdout] | [INFO] [stdout] 50 | impl Circle { [INFO] [stdout] | ----------- method in this implementation [INFO] [stdout] 51 | fn can_hold(&self, other: &Circle) -> bool { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `call` is never used [INFO] [stdout] --> src/method_demo/method_demo.rs:71:8 [INFO] [stdout] | [INFO] [stdout] 70 | impl Message { [INFO] [stdout] | ------------ method in this implementation [INFO] [stdout] 71 | fn call(&self) { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `y` is never read [INFO] [stdout] --> src/generics_demo/generics_demo.rs:19:5 [INFO] [stdout] | [INFO] [stdout] 17 | struct Point { [INFO] [stdout] | ----- field in this struct [INFO] [stdout] 18 | x: T, [INFO] [stdout] 19 | y: T, [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `content` is never read [INFO] [stdout] --> src/generics_demo/trait_demo.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 9 | pub struct Post { [INFO] [stdout] | ---- field in this struct [INFO] [stdout] ... [INFO] [stdout] 14 | pub content: String, // 内容 [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify` is never used [INFO] [stdout] --> src/generics_demo/trait_demo.rs:46:8 [INFO] [stdout] | [INFO] [stdout] 46 | pub fn notify(item: &impl Summary) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `short_handle` is never used [INFO] [stdout] --> src/return_error_demo/return_error_demo.rs:16:8 [INFO] [stdout] | [INFO] [stdout] 16 | pub fn short_handle() -> Result{ [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `first` is never used [INFO] [stdout] --> src/return_error_demo/return_error_demo.rs:23:8 [INFO] [stdout] | [INFO] [stdout] 23 | pub fn first(arr: &[i32]) -> Option{ [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `last_char_of_first_line` is never used [INFO] [stdout] --> src/return_error_demo/return_error_demo.rs:30:4 [INFO] [stdout] | [INFO] [stdout] 30 | fn last_char_of_first_line(text: &str) -> Option { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `try_demo` is never used [INFO] [stdout] --> src/return_error_demo/return_error_demo.rs:44:8 [INFO] [stdout] | [INFO] [stdout] 44 | pub fn try_demo() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/return_error_demo/test.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | read_username_from_file(); [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)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 5 | let _ = read_username_from_file(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s [INFO] running `Command { std: "docker" "inspect" "799d19837d8c469c8cc7995548cc64c120e86aa20ea728f5c5530d6e5d51c953", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "799d19837d8c469c8cc7995548cc64c120e86aa20ea728f5c5530d6e5d51c953", kill_on_drop: false }` [INFO] [stdout] 799d19837d8c469c8cc7995548cc64c120e86aa20ea728f5c5530d6e5d51c953