[INFO] cloning repository https://github.com/yew1eb/rustlab [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yew1eb/rustlab" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyew1eb%2Frustlab", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyew1eb%2Frustlab'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 3ccf8588ba87d3ef5505dfdf8ef1bf9c93fa192e [INFO] checking yew1eb/rustlab against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyew1eb%2Frustlab" "/workspace/builds/worker-6/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/yew1eb/rustlab on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/yew1eb/rustlab [INFO] finished tweaking git repo https://github.com/yew1eb/rustlab [INFO] tweaked toml for git repo https://github.com/yew1eb/rustlab written to /workspace/builds/worker-6/source/Cargo.toml [INFO] crate git repo https://github.com/yew1eb/rustlab already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 63ac92f1ed98d60eecd578d951a6c935ce823289c2a196b3553853dabbc07446 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "63ac92f1ed98d60eecd578d951a6c935ce823289c2a196b3553853dabbc07446", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "63ac92f1ed98d60eecd578d951a6c935ce823289c2a196b3553853dabbc07446", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "63ac92f1ed98d60eecd578d951a6c935ce823289c2a196b3553853dabbc07446", kill_on_drop: false }` [INFO] [stdout] 63ac92f1ed98d60eecd578d951a6c935ce823289c2a196b3553853dabbc07446 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 44bd5640b90bd58e4b8cee06a12afb62fd2751dddc93350d1078b5d39082716e [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "44bd5640b90bd58e4b8cee06a12afb62fd2751dddc93350d1078b5d39082716e", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.80 [INFO] [stderr] Compiling proc-macro2 v1.0.24 [INFO] [stderr] Compiling unicode-xid v0.2.1 [INFO] [stderr] Compiling syn v1.0.48 [INFO] [stderr] Compiling memchr v2.4.0 [INFO] [stderr] Compiling version_check v0.9.2 [INFO] [stderr] Checking cfg-if v0.1.10 [INFO] [stderr] Compiling log v0.4.11 [INFO] [stderr] Checking lazy_static v1.4.0 [INFO] [stderr] Checking cfg-if v1.0.0 [INFO] [stderr] Compiling proc-macro-hack v0.5.19 [INFO] [stderr] Compiling bitflags v1.2.1 [INFO] [stderr] Checking slab v0.4.2 [INFO] [stderr] Checking futures-core v0.3.7 [INFO] [stderr] Checking futures-sink v0.3.7 [INFO] [stderr] Checking bytes v0.5.6 [INFO] [stderr] Checking futures-io v0.3.7 [INFO] [stderr] Checking fnv v1.0.7 [INFO] [stderr] Checking pin-project-lite v0.1.11 [INFO] [stderr] Compiling proc-macro-nested v0.1.6 [INFO] [stderr] Checking once_cell v1.4.1 [INFO] [stderr] Checking pin-utils v0.1.0 [INFO] [stderr] Compiling pin-project-internal v0.4.27 [INFO] [stderr] Compiling serde_derive v1.0.117 [INFO] [stderr] Compiling serde v1.0.117 [INFO] [stderr] Checking matches v0.1.8 [INFO] [stderr] Compiling unicode-segmentation v1.6.0 [INFO] [stderr] Compiling getrandom v0.1.15 [INFO] [stderr] Compiling byteorder v1.3.4 [INFO] [stderr] Checking gimli v0.23.0 [INFO] [stderr] Checking ppv-lite86 v0.2.10 [INFO] [stderr] Checking copyless v0.1.5 [INFO] [stderr] Checking percent-encoding v2.1.0 [INFO] [stderr] Checking rustc-demangle v0.1.18 [INFO] [stderr] Checking object v0.22.0 [INFO] [stderr] Compiling typenum v1.12.0 [INFO] [stderr] Compiling glob v0.3.0 [INFO] [stderr] Checking linked-hash-map v0.5.3 [INFO] [stderr] Compiling serde_json v1.0.59 [INFO] [stderr] Compiling crc32fast v1.2.1 [INFO] [stderr] Compiling httparse v1.3.4 [INFO] [stderr] Compiling encoding_rs v0.8.26 [INFO] [stderr] Checking cpuid-bool v0.1.2 [INFO] [stderr] Compiling regex-syntax v0.6.25 [INFO] [stderr] Checking opaque-debug v0.3.0 [INFO] [stderr] Compiling bindgen v0.57.0 [INFO] [stderr] Compiling lazycell v1.3.0 [INFO] [stderr] Compiling peeking_take_while v0.1.2 [INFO] [stderr] Checking base64 v0.13.0 [INFO] [stderr] Checking language-tags v0.2.2 [INFO] [stderr] Checking mime v0.3.16 [INFO] [stderr] Compiling pkg-config v0.3.19 [INFO] [stderr] Compiling maybe-uninit v2.0.0 [INFO] [stderr] Checking unicode-width v0.1.8 [INFO] [stderr] Compiling failure_derive v0.1.8 [INFO] [stderr] Checking ansi_term v0.11.0 [INFO] [stderr] Checking percent-encoding v1.0.1 [INFO] [stderr] Checking strsim v0.8.0 [INFO] [stderr] Checking vec_map v0.8.2 [INFO] [stderr] Checking humantime v2.0.1 [INFO] [stderr] Checking difference v2.0.0 [INFO] [stderr] Checking mylib v0.1.0 (/opt/rustwide/workdir/example-projects/trpl-webserver/mylib) [INFO] [stderr] Checking json v0.12.4 [INFO] [stdout] warning: field is never read: `id` [INFO] [stdout] --> example-projects/trpl-webserver/mylib/src/lib.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 7 | id: usize, [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking rustlab v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Compiling miniz_oxide v0.4.3 [INFO] [stderr] Compiling num-traits v0.2.14 [INFO] [stderr] Compiling indexmap v1.6.0 [INFO] [stdout] warning: field is never read: `id` [INFO] [stdout] --> example-projects/trpl-webserver/mylib/src/lib.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 7 | id: usize, [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling num-integer v0.1.44 [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling crossbeam-utils v0.7.2 [INFO] [stderr] Checking instant v0.1.8 [INFO] [stderr] Checking tracing-core v0.1.17 [INFO] [stderr] Checking lock_api v0.4.1 [INFO] [stderr] Checking futures-channel v0.3.7 [INFO] [stderr] Checking unicode-bidi v0.3.4 [INFO] [stderr] Checking futures-task v0.3.7 [INFO] [stderr] Checking http v0.2.1 [INFO] [stderr] Checking bytestring v0.1.5 [INFO] [stderr] Compiling standback v0.2.11 [INFO] [stderr] Compiling generic-array v0.14.4 [INFO] [stderr] Compiling time v0.2.22 [INFO] [stderr] Compiling nom v5.1.2 [INFO] [stderr] Compiling cookie v0.14.3 [INFO] [stderr] Compiling proc-macro-error-attr v1.0.4 [INFO] [stderr] Compiling proc-macro-error v1.0.4 [INFO] [stderr] Compiling libloading v0.7.0 [INFO] [stderr] Compiling heck v0.3.1 [INFO] [stderr] Checking lru-cache v0.1.2 [INFO] [stderr] Checking tinyvec v1.0.1 [INFO] [stderr] Checking textwrap v0.11.0 [INFO] [stderr] Checking predicates-tree v1.0.2 [INFO] [stderr] Checking trpl-webserver v0.1.0 (/opt/rustwide/workdir/example-projects/trpl-webserver) [INFO] [stderr] Compiling clang-sys v1.2.0 [INFO] [stderr] Checking idna v0.2.0 [INFO] [stderr] Checking idna v0.1.5 [INFO] [stderr] Compiling mysqlclient-sys v0.2.4 [INFO] [stderr] Checking tracing v0.1.21 [INFO] [stderr] Checking aho-corasick v0.7.18 [INFO] [stderr] Compiling quote v1.0.7 [INFO] [stderr] Checking fxhash v0.2.1 [INFO] [stderr] Checking regex-automata v0.1.9 [INFO] [stderr] Checking url v1.7.2 [INFO] [stderr] Checking url v2.1.1 [INFO] [stderr] Checking net2 v0.2.35 [INFO] [stderr] Checking iovec v0.1.4 [INFO] [stderr] Checking signal-hook-registry v1.2.2 [INFO] [stderr] Checking parking_lot_core v0.8.0 [INFO] [stderr] Checking num_cpus v1.13.0 [INFO] [stderr] Checking hostname v0.3.1 [INFO] [stderr] Checking atty v0.2.14 [INFO] [stderr] Checking socket2 v0.3.15 [INFO] [stderr] Checking time v0.1.44 [INFO] [stderr] Checking wait-timeout v0.2.0 [INFO] [stderr] Compiling jobserver v0.1.21 [INFO] [stderr] Checking flate2 v1.0.19 [INFO] [stderr] Checking addr2line v0.14.0 [INFO] [stderr] Checking crossbeam-channel v0.4.4 [INFO] [stderr] Checking bstr v0.2.16 [INFO] [stderr] Checking threadpool v1.8.1 [INFO] [stderr] Checking parking_lot v0.11.0 [INFO] [stderr] Checking mio v0.6.22 [INFO] [stderr] Checking clap v2.33.3 [INFO] [stderr] Checking resolv-conf v0.6.3 [INFO] [stderr] Checking rand_core v0.5.1 [INFO] [stderr] Compiling cc v1.0.61 [INFO] [stderr] Compiling regex v1.5.3 [INFO] [stderr] Checking float-cmp v0.8.0 [INFO] [stderr] Checking backtrace v0.3.54 [INFO] [stderr] Checking scheduled-thread-pool v0.2.5 [INFO] [stderr] Checking block-buffer v0.9.0 [INFO] [stderr] Checking digest v0.9.0 [INFO] [stderr] Checking rand_chacha v0.2.2 [INFO] [stderr] Checking r2d2 v0.8.9 [INFO] [stderr] Checking mio-uds v0.6.8 [INFO] [stderr] Checking sha-1 v0.9.2 [INFO] [stderr] Checking rand v0.7.3 [INFO] [stderr] Checking tokio v0.2.22 [INFO] [stderr] Compiling cexpr v0.4.0 [INFO] [stderr] Compiling brotli-sys v0.3.2 [INFO] [stderr] Checking predicates v1.0.8 [INFO] [stderr] Checking env_logger v0.7.1 [INFO] [stderr] Checking env_logger v0.8.1 [INFO] [stderr] Checking basic-exercises v0.1.0 (/opt/rustwide/workdir/basic-exercises) [INFO] [stdout] warning: unused import: `super::*` [INFO] [stdout] --> basic-exercises/src/basic_type.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | use super::*; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] note: the lint level is defined here [INFO] [stdout] --> basic-exercises/src/main.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | #![warn(unused_imports)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> basic-exercises/src/closure_base.rs:1:27 [INFO] [stdout] | [INFO] [stdout] 1 | fn counter(i: i32) -> Box i32> { [INFO] [stdout] | ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `super::*` [INFO] [stdout] --> basic-exercises/src/collection_types.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | use super::*; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused label [INFO] [stdout] --> basic-exercises/src/loops.rs:14:17 [INFO] [stdout] | [INFO] [stdout] 14 | 'second_loop: loop { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_labels)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trailing semicolon in macro used in expression position [INFO] [stdout] --> basic-exercises/src/macros_base.rs:5:27 [INFO] [stdout] | [INFO] [stdout] 5 | println!("Hello!"); [INFO] [stdout] | ^ [INFO] [stdout] ... [INFO] [stdout] 78 | say_hello!() [INFO] [stdout] | ------------ in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(semicolon_in_expressions_from_macros)]` on by default [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! [INFO] [stdout] = note: for more information, see issue #79813 [INFO] [stdout] = note: macro invocations at the end of a block are treated as expressions [INFO] [stdout] = note: to ignore the value produced by the macro, add a semicolon after the invocation of `say_hello` [INFO] [stdout] = note: this warning originates in the macro `say_hello` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `Receiver`, `Sender` [INFO] [stdout] --> basic-exercises/src/std_misc_channels_base.rs:2:23 [INFO] [stdout] | [INFO] [stdout] 2 | use std::sync::mpsc::{Receiver, Sender}; [INFO] [stdout] | ^^^^^^^^ ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::env` [INFO] [stdout] --> basic-exercises/src/std_misc_env_arg_base.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::env; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary trailing semicolon [INFO] [stdout] --> basic-exercises/src/std_vector_base.rs:72:10 [INFO] [stdout] | [INFO] [stdout] 72 | }; [INFO] [stdout] | ^ help: remove this semicolon [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(redundant_semicolons)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary trailing semicolon [INFO] [stdout] --> basic-exercises/src/struct_base.rs:48:20 [INFO] [stdout] | [INFO] [stdout] 48 | struct A {}; [INFO] [stdout] | ^ help: remove this semicolon [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> basic-exercises/src/closure_base.rs:1:27 [INFO] [stdout] | [INFO] [stdout] 1 | fn counter(i: i32) -> Box i32> { [INFO] [stdout] | ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused macro definition [INFO] [stdout] --> basic-exercises/src/macros_base.rs:1:1 [INFO] [stdout] | [INFO] [stdout] 1 | / macro_rules! say_hello { [INFO] [stdout] 2 | | // `()` 表示此宏不接受任何参数。 [INFO] [stdout] 3 | | () => { [INFO] [stdout] 4 | | // 此宏将会展开成这个代码块里面的内容。 [INFO] [stdout] 5 | | println!("Hello!"); [INFO] [stdout] 6 | | }; [INFO] [stdout] 7 | | } [INFO] [stdout] | |_^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_macros)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused macro definition [INFO] [stdout] --> basic-exercises/src/macros_base.rs:26:1 [INFO] [stdout] | [INFO] [stdout] 26 | / macro_rules! print_result { [INFO] [stdout] 27 | | // 此宏接受一个 `expr` 类型的表达式，将它转换成一个字符串， [INFO] [stdout] 28 | | // 并伴随着表达式的结果。 [INFO] [stdout] 29 | | // `expr` 指示符用于表达式。 [INFO] [stdout] ... | [INFO] [stdout] 34 | | }; [INFO] [stdout] 35 | | } [INFO] [stdout] | |_^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused macro definition [INFO] [stdout] --> basic-exercises/src/macros_base.rs:39:1 [INFO] [stdout] | [INFO] [stdout] 39 | / macro_rules! test { [INFO] [stdout] 40 | | // 参数不需要使用逗号隔开。 [INFO] [stdout] 41 | | // 可以使用任意模板（原文：Any template can be used!）！ [INFO] [stdout] 42 | | ($left:expr; and $right:expr) => { [INFO] [stdout] ... | [INFO] [stdout] 58 | | }; [INFO] [stdout] 59 | | } [INFO] [stdout] | |_^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused macro definition [INFO] [stdout] --> basic-exercises/src/macros_base.rs:62:1 [INFO] [stdout] | [INFO] [stdout] 62 | / macro_rules! find_min { [INFO] [stdout] 63 | | // 基本情形： [INFO] [stdout] 64 | | ($x:expr) => ($x); [INFO] [stdout] 65 | | // `$x` 后面跟着至少一个 `$y,` [INFO] [stdout] ... | [INFO] [stdout] 69 | | ) [INFO] [stdout] 70 | | } [INFO] [stdout] | |_^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::mem` [INFO] [stdout] --> basic-exercises/src/std_box_base.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::mem; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] note: the lint level is defined here [INFO] [stdout] --> basic-exercises/src/main.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | #![warn(unused_imports)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::collections::HashMap` [INFO] [stdout] --> basic-exercises/src/std_hashmap_base.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::collections::HashMap; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::collections::HashSet` [INFO] [stdout] --> basic-exercises/src/std_hashset_base.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::collections::HashSet; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::sync::mpsc` [INFO] [stdout] --> basic-exercises/src/std_misc_channels_base.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::sync::mpsc; [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `Receiver`, `Sender` [INFO] [stdout] --> basic-exercises/src/std_misc_channels_base.rs:2:23 [INFO] [stdout] | [INFO] [stdout] 2 | use std::sync::mpsc::{Receiver, Sender}; [INFO] [stdout] | ^^^^^^^^ ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::thread` [INFO] [stdout] --> basic-exercises/src/std_misc_channels_base.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use std::thread; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::env` [INFO] [stdout] --> basic-exercises/src/std_misc_env_arg_base.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::env; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::fs` [INFO] [stdout] --> basic-exercises/src/std_misc_io_fs_base.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::fs; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::os::unix` [INFO] [stdout] --> basic-exercises/src/std_misc_io_fs_base.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use std::os::unix; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::error::Error` [INFO] [stdout] --> basic-exercises/src/std_misc_path_file_base.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::error::Error; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::fs::File` [INFO] [stdout] --> basic-exercises/src/std_misc_path_file_base.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::fs::File; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::io::prelude::*` [INFO] [stdout] --> basic-exercises/src/std_misc_path_file_base.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use std::io::prelude::*; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::path::Path` [INFO] [stdout] --> basic-exercises/src/std_misc_path_file_base.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use std::path::Path; [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::error::Error` [INFO] [stdout] --> basic-exercises/src/std_misc_process_base.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::error::Error; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::io::prelude::*` [INFO] [stdout] --> basic-exercises/src/std_misc_process_base.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::io::prelude::*; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `Command`, `Stdio` [INFO] [stdout] --> basic-exercises/src/std_misc_process_base.rs:3:20 [INFO] [stdout] | [INFO] [stdout] 3 | use std::process::{Command, Stdio}; [INFO] [stdout] | ^^^^^^^ ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::thread` [INFO] [stdout] --> basic-exercises/src/std_misc_threads_base.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::thread; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `population` [INFO] [stdout] --> basic-exercises/src/destructuring_base.rs:30:9 [INFO] [stdout] | [INFO] [stdout] 30 | population, [INFO] [stdout] | ^^^^^^^^^^ help: try ignoring the field: `population: _` [INFO] [stdout] | [INFO] [stdout] note: the lint level is defined here [INFO] [stdout] --> basic-exercises/src/main.rs:2:9 [INFO] [stdout] | [INFO] [stdout] 2 | #![warn(unused_variables)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `date_founded` [INFO] [stdout] --> basic-exercises/src/destructuring_base.rs:31:9 [INFO] [stdout] | [INFO] [stdout] 31 | date_founded, [INFO] [stdout] | ^^^^^^^^^^^^ help: try ignoring the field: `date_founded: _` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> basic-exercises/src/std_result_base.rs:87:28 [INFO] [stdout] | [INFO] [stdout] 87 | Err(why) => panic!(match why { [INFO] [stdout] | ____________________________^ [INFO] [stdout] 88 | | checked::MathError::NegativeLogarithm => "logarithm of negative number", [INFO] [stdout] 89 | | checked::MathError::DivisionByZero => "division by zero", [INFO] [stdout] 90 | | checked::MathError::NegativeSquareRoot => "square root of negative number", [INFO] [stdout] 91 | | }), [INFO] [stdout] | |_________^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_fmt_panics)]` on by default [INFO] [stdout] = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021 [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: add a "{}" format string to Display the message [INFO] [stdout] | [INFO] [stdout] 87 | Err(why) => panic!("{}", match why { [INFO] [stdout] | +++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 25 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string() [INFO] [stdout] --> basic-exercises/src/std_misc_path_file_base.rs:42:69 [INFO] [stdout] | [INFO] [stdout] 42 | Err(why) => panic!("couldn't open {}: {}", display, why.description()), [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string() [INFO] [stdout] --> basic-exercises/src/std_misc_path_file_base.rs:49:69 [INFO] [stdout] | [INFO] [stdout] 49 | Err(why) => panic!("couldn't read {}: {}", display, why.description()), [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string() [INFO] [stdout] --> basic-exercises/src/std_misc_path_file_base.rs:72:71 [INFO] [stdout] | [INFO] [stdout] 72 | Err(why) => panic!("couldn't create {}: {}", display, why.description()), [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string() [INFO] [stdout] --> basic-exercises/src/std_misc_path_file_base.rs:78:73 [INFO] [stdout] | [INFO] [stdout] 78 | Err(why) => panic!("couldn't write to {}: {}", display, why.description()), [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string() [INFO] [stdout] --> basic-exercises/src/std_misc_process_base.rs:37:61 [INFO] [stdout] | [INFO] [stdout] 37 | Err(why) => panic!("couldn't spawn wc: {}", why.description()), [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string() [INFO] [stdout] --> basic-exercises/src/std_misc_process_base.rs:48:70 [INFO] [stdout] | [INFO] [stdout] 48 | Err(why) => panic!("couldn't write to wc stdin: {}", why.description()), [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string() [INFO] [stdout] --> basic-exercises/src/std_misc_process_base.rs:59:67 [INFO] [stdout] | [INFO] [stdout] 59 | Err(why) => panic!("couldn't read wc stdout: {}", why.description()), [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: irrefutable `if let` pattern [INFO] [stdout] --> basic-exercises/src/basic_type.rs:26:12 [INFO] [stdout] | [INFO] [stdout] 26 | if let y = 5 { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(irrefutable_let_patterns)]` on by default [INFO] [stdout] = note: this pattern will always match, so the `if let` is useless [INFO] [stdout] = help: consider replacing the `if let` with a `let` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `str1` [INFO] [stdout] --> basic-exercises/src/basic_type.rs:255:21 [INFO] [stdout] | [INFO] [stdout] 255 | let mut str1 = String::from("hello"); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_str1` [INFO] [stdout] | [INFO] [stdout] note: the lint level is defined here [INFO] [stdout] --> basic-exercises/src/main.rs:2:9 [INFO] [stdout] | [INFO] [stdout] 2 | #![warn(unused_variables)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> basic-exercises/src/basic_type.rs:25:13 [INFO] [stdout] | [INFO] [stdout] 25 | let x = 5; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `a` is never read [INFO] [stdout] --> basic-exercises/src/basic_type.rs:84:17 [INFO] [stdout] | [INFO] [stdout] 84 | let mut a: f64 = 1.0; [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> basic-exercises/src/basic_type.rs:85:13 [INFO] [stdout] | [INFO] [stdout] 85 | let b = 2.0f32; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> basic-exercises/src/basic_type.rs:90:13 [INFO] [stdout] | [INFO] [stdout] 90 | let a = a; //不能赋值 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> basic-exercises/src/basic_type.rs:99:13 [INFO] [stdout] | [INFO] [stdout] 99 | let b: [u8; 3] = [8, 6, 5]; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `slice_complete` [INFO] [stdout] --> basic-exercises/src/basic_type.rs:105:13 [INFO] [stdout] | [INFO] [stdout] 105 | let slice_complete = &arr[..]; // 获取全部元素 [INFO] [stdout] | ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_complete` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `slice_middle` [INFO] [stdout] --> basic-exercises/src/basic_type.rs:106:13 [INFO] [stdout] | [INFO] [stdout] 106 | let slice_middle = &arr[1..4]; // 获取中间元素，最后取得的 Slice 为 [2, 3, 4] 。切片遵循左 闭右开原则。 [INFO] [stdout] | ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_middle` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `slice_right` [INFO] [stdout] --> basic-exercises/src/basic_type.rs:107:13 [INFO] [stdout] | [INFO] [stdout] 107 | let slice_right = &arr[1..]; // 最后获得的元素为[2, 3, 4, 5, 6]，长度为 5。 [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_right` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `slice_left` [INFO] [stdout] --> basic-exercises/src/basic_type.rs:108:13 [INFO] [stdout] | [INFO] [stdout] 108 | let slice_left = &arr[..3]; // 最后获得的元素为[1, 2, 3]，长度为 3。 [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_left` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v2` [INFO] [stdout] --> basic-exercises/src/basic_type.rs:112:13 [INFO] [stdout] | [INFO] [stdout] 112 | let v2 = vec![0; 10]; // 声明一个初始长度为 10 的值全为 0 的动态数组 [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_v2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> basic-exercises/src/basic_type.rs:147:37 [INFO] [stdout] | [INFO] [stdout] 147 | Message::ChangeColor(x, y, z) => println!("{}", x), [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `z` [INFO] [stdout] --> basic-exercises/src/basic_type.rs:147:40 [INFO] [stdout] | [INFO] [stdout] 147 | Message::ChangeColor(x, y, z) => println!("{}", x), [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_z` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> basic-exercises/src/basic_type.rs:150:36 [INFO] [stdout] | [INFO] [stdout] 150 | Message::Location { x, y } => println!("{}", x), [INFO] [stdout] | ^ help: try ignoring the field: `y: _` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `d` [INFO] [stdout] --> basic-exercises/src/basic_type.rs:168:13 [INFO] [stdout] | [INFO] [stdout] 168 | let d: &'static str = r"abc \n abc"; //等 价于 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_d` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> basic-exercises/src/basic_type.rs:169:13 [INFO] [stdout] | [INFO] [stdout] 169 | let c: &'static str = "abc \\n abc"; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `number_word_hashmap2` [INFO] [stdout] --> basic-exercises/src/closure_base.rs:51:13 [INFO] [stdout] | [INFO] [stdout] 51 | let number_word_hashmap2: HashMap<_, _> = some_numbers [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_number_word_hashmap2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> basic-exercises/src/collection_types.rs:58:14 [INFO] [stdout] | [INFO] [stdout] 58 | let (a, b, _) = (str_vec[0], str_vec[1], str_vec[2]); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `population` [INFO] [stdout] --> basic-exercises/src/destructuring_base.rs:30:9 [INFO] [stdout] | [INFO] [stdout] 30 | population, [INFO] [stdout] | ^^^^^^^^^^ help: try ignoring the field: `population: _` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `date_founded` [INFO] [stdout] --> basic-exercises/src/destructuring_base.rs:31:9 [INFO] [stdout] | [INFO] [stdout] 31 | date_founded, [INFO] [stdout] | ^^^^^^^^^^^^ help: try ignoring the field: `date_founded: _` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i1` [INFO] [stdout] --> basic-exercises/src/enum_base.rs:46:13 [INFO] [stdout] | [INFO] [stdout] 46 | let i1 = IpAddr { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_i1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i2` [INFO] [stdout] --> basic-exercises/src/enum_base.rs:50:13 [INFO] [stdout] | [INFO] [stdout] 50 | let i2 = IpAddr { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_i2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i1` [INFO] [stdout] --> basic-exercises/src/enum_base.rs:60:13 [INFO] [stdout] | [INFO] [stdout] 60 | let i1 = IpAddr2::V4(String::from("127.0.0.1")); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_i1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i2` [INFO] [stdout] --> basic-exercises/src/enum_base.rs:61:13 [INFO] [stdout] | [INFO] [stdout] 61 | let i2 = IpAddr2::V6(String::from("::1")); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_i2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i1` [INFO] [stdout] --> basic-exercises/src/enum_base.rs:68:13 [INFO] [stdout] | [INFO] [stdout] 68 | let i1 = IpAddr3::V4(127, 0, 0, 1); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_i1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i2` [INFO] [stdout] --> basic-exercises/src/enum_base.rs:69:13 [INFO] [stdout] | [INFO] [stdout] 69 | let i2 = IpAddr3::V6(String::from("::1")); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_i2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> basic-exercises/src/fn_base.rs:35:13 [INFO] [stdout] | [INFO] [stdout] 35 | let a: i32 = square(37, 41); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> basic-exercises/src/fn_base.rs:36:13 [INFO] [stdout] | [INFO] [stdout] 36 | let b: f64 = square(37.2, 41.1); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `magic2` [INFO] [stdout] --> basic-exercises/src/lifetime_base.rs:76:17 [INFO] [stdout] | [INFO] [stdout] 76 | let magic2 = String::from("shazam!"); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_magic2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `fox` [INFO] [stdout] --> basic-exercises/src/lifetime_base.rs:102:13 [INFO] [stdout] | [INFO] [stdout] 102 | let fox = Highlight(&text[4..19]); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_fox` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `dog` [INFO] [stdout] --> basic-exercises/src/lifetime_base.rs:103:13 [INFO] [stdout] | [INFO] [stdout] 103 | let dog = Highlight(&text[35..43]); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_dog` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `display` [INFO] [stdout] --> basic-exercises/src/std_misc_path_file_base.rs:18:13 [INFO] [stdout] | [INFO] [stdout] 18 | let display = path.display(); [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_display` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `some_number` [INFO] [stdout] --> basic-exercises/src/std_option_base.rs:22:13 [INFO] [stdout] | [INFO] [stdout] 22 | let some_number = Some(5); [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_number` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `some_string` [INFO] [stdout] --> basic-exercises/src/std_option_base.rs:23:13 [INFO] [stdout] | [INFO] [stdout] 23 | let some_string = Some(String::from("a string")); [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `absent_number` [INFO] [stdout] --> basic-exercises/src/std_option_base.rs:24:13 [INFO] [stdout] | [INFO] [stdout] 24 | let absent_number: Option = None; [INFO] [stdout] | ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_absent_number` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> basic-exercises/src/std_vector_base.rs:38:17 [INFO] [stdout] | [INFO] [stdout] 38 | let mut v: Vec = Vec::new(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v1` [INFO] [stdout] --> basic-exercises/src/std_vector_base.rs:43:17 [INFO] [stdout] | [INFO] [stdout] 43 | let v1 = vec![1, 2, 3]; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_v1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> basic-exercises/src/std_vector_base.rs:74:13 [INFO] [stdout] | [INFO] [stdout] 74 | let c = vec![ [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> basic-exercises/src/struct_base.rs:44:13 [INFO] [stdout] | [INFO] [stdout] 44 | let b = Point(30, 11); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> basic-exercises/src/basic_type.rs:210:17 [INFO] [stdout] | [INFO] [stdout] 210 | let mut str2 = &mut str1; [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> basic-exercises/src/basic_type.rs:214:17 [INFO] [stdout] | [INFO] [stdout] 214 | let mut str3 = &mut str1; [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> basic-exercises/src/basic_type.rs:234:17 [INFO] [stdout] | [INFO] [stdout] 234 | let mut v2 = &mut v1; [INFO] [stdout] | ----^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> basic-exercises/src/basic_type.rs:237:17 [INFO] [stdout] | [INFO] [stdout] 237 | let mut v3 = &mut v1; [INFO] [stdout] | ----^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> basic-exercises/src/basic_type.rs:255:17 [INFO] [stdout] | [INFO] [stdout] 255 | let mut str1 = String::from("hello"); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> basic-exercises/src/basic_type.rs:275:17 [INFO] [stdout] | [INFO] [stdout] 275 | let mut a = String::from("testa 你好"); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> basic-exercises/src/basic_type.rs:276:17 [INFO] [stdout] | [INFO] [stdout] 276 | let mut b = &a[0..4]; [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> basic-exercises/src/basic_type.rs:284:21 [INFO] [stdout] | [INFO] [stdout] 284 | let mut a = String::from("testa 你好"); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> basic-exercises/src/basic_type.rs:290:21 [INFO] [stdout] | [INFO] [stdout] 290 | let mut b = &mut a; [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking assert_cmd v1.0.3 [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> basic-exercises/src/std_vector_base.rs:38:13 [INFO] [stdout] | [INFO] [stdout] 38 | let mut v: Vec = Vec::new(); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> basic-exercises/src/std_result_base.rs:87:28 [INFO] [stdout] | [INFO] [stdout] 87 | Err(why) => panic!(match why { [INFO] [stdout] | ____________________________^ [INFO] [stdout] 88 | | checked::MathError::NegativeLogarithm => "logarithm of negative number", [INFO] [stdout] 89 | | checked::MathError::DivisionByZero => "division by zero", [INFO] [stdout] 90 | | checked::MathError::NegativeSquareRoot => "square root of negative number", [INFO] [stdout] 91 | | }), [INFO] [stdout] | |_________^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_fmt_panics)]` on by default [INFO] [stdout] = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021 [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: add a "{}" format string to Display the message [INFO] [stdout] | [INFO] [stdout] 87 | Err(why) => panic!("{}", match why { [INFO] [stdout] | +++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 67 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking tokio-util v0.3.1 [INFO] [stderr] Checking brotli2 v0.3.2 [INFO] [stderr] Compiling synstructure v0.12.4 [INFO] [stderr] Compiling pin-project-internal v1.0.1 [INFO] [stderr] Compiling futures-macro v0.3.7 [INFO] [stderr] Compiling derive_more v0.99.11 [INFO] [stderr] Compiling actix-macros v0.1.2 [INFO] [stderr] Compiling thiserror-impl v1.0.21 [INFO] [stderr] Compiling enum-as-inner v0.3.3 [INFO] [stderr] Compiling async-trait v0.1.41 [INFO] [stderr] Compiling time-macros-impl v0.1.1 [INFO] [stderr] Compiling actix-web-codegen v0.4.0 [INFO] [stderr] Compiling structopt-derive v0.4.14 [INFO] [stderr] Compiling diesel_derives v1.4.1 [INFO] [stderr] Compiling actix_derive v0.5.0 [INFO] [stderr] Checking time-macros v0.1.1 [INFO] [stderr] Compiling librocksdb-sys v6.17.3 [INFO] [stderr] error: could not compile `derive_more` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `rustc --crate-name derive_more --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/derive_more-0.99.11/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type proc-macro --emit=dep-info,link -C prefer-dynamic -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="add"' --cfg 'feature="add_assign"' --cfg 'feature="as_mut"' --cfg 'feature="as_ref"' --cfg 'feature="constructor"' --cfg 'feature="default"' --cfg 'feature="deref"' --cfg 'feature="deref_mut"' --cfg 'feature="display"' --cfg 'feature="error"' --cfg 'feature="from"' --cfg 'feature="from_str"' --cfg 'feature="index"' --cfg 'feature="index_mut"' --cfg 'feature="into"' --cfg 'feature="into_iterator"' --cfg 'feature="iterator"' --cfg 'feature="mul"' --cfg 'feature="mul_assign"' --cfg 'feature="not"' --cfg 'feature="sum"' --cfg 'feature="try_into"' -C metadata=1cb6fbf160597d4a -C extra-filename=-1cb6fbf160597d4a --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-9b4df95ecb31aae2.rlib --extern quote=/opt/rustwide/target/debug/deps/libquote-607d93f1732fa0e8.rlib --extern syn=/opt/rustwide/target/debug/deps/libsyn-33d547d30f186889.rlib --extern proc_macro --cap-lints allow --cap-lints=forbid` (signal: 9, SIGKILL: kill) [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: build failed [INFO] running `Command { std: "docker" "inspect" "44bd5640b90bd58e4b8cee06a12afb62fd2751dddc93350d1078b5d39082716e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "44bd5640b90bd58e4b8cee06a12afb62fd2751dddc93350d1078b5d39082716e", kill_on_drop: false }` [INFO] [stdout] 44bd5640b90bd58e4b8cee06a12afb62fd2751dddc93350d1078b5d39082716e