[INFO] cloning repository https://github.com/yukimemi/gsr-rs [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yukimemi/gsr-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyukimemi%2Fgsr-rs", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyukimemi%2Fgsr-rs'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 245cae1f9f03afab8c523ecb40abe96ca094a33d [INFO] checking yukimemi/gsr-rs against master#642c19bfc3a5c1de985bf5d0cc8207ac9d22708a for pr-148577 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyukimemi%2Fgsr-rs" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/yukimemi/gsr-rs [INFO] finished tweaking git repo https://github.com/yukimemi/gsr-rs [INFO] tweaked toml for git repo https://github.com/yukimemi/gsr-rs written to /workspace/builds/worker-3-tc1/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/yukimemi/gsr-rs on toolchain 642c19bfc3a5c1de985bf5d0cc8207ac9d22708a [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/yukimemi/gsr-rs 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" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024 [INFO] [stderr] Updating crates.io index [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded textwrap v0.9.0 [INFO] [stderr] Downloaded walkdir v2.0.1 [INFO] [stderr] Downloaded structopt v0.1.4 [INFO] [stderr] Downloaded atty v0.2.3 [INFO] [stderr] Downloaded memchr v1.0.2 [INFO] [stderr] Downloaded thread_local v0.3.4 [INFO] [stderr] Downloaded num_cpus v1.7.0 [INFO] [stderr] Downloaded lazy_static v0.2.9 [INFO] [stderr] Downloaded aho-corasick v0.6.3 [INFO] [stderr] Downloaded termion v1.5.1 [INFO] [stderr] Downloaded utf8-ranges v1.0.0 [INFO] [stderr] Downloaded threadpool v1.7.1 [INFO] [stderr] Downloaded same-file v1.0.0 [INFO] [stderr] Downloaded redox_syscall v0.1.31 [INFO] [stderr] Downloaded redox_termios v0.1.1 [INFO] [stderr] Downloaded regex-syntax v0.4.1 [INFO] [stderr] Downloaded libc v0.2.33 [INFO] [stderr] Downloaded clap v2.27.1 [INFO] [stderr] Downloaded structopt-derive v0.1.4 [INFO] [stderr] Downloaded regex v0.2.2 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 845100a41da5c3ed31345ad1082dde3be4ef8562e39b58e56c887500d793c284 [INFO] running `Command { std: "docker" "start" "-a" "845100a41da5c3ed31345ad1082dde3be4ef8562e39b58e56c887500d793c284", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "845100a41da5c3ed31345ad1082dde3be4ef8562e39b58e56c887500d793c284", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "845100a41da5c3ed31345ad1082dde3be4ef8562e39b58e56c887500d793c284", kill_on_drop: false }` [INFO] [stdout] 845100a41da5c3ed31345ad1082dde3be4ef8562e39b58e56c887500d793c284 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 13cdbb15253fb0e4f9f4916d6ba794a3cbcc175e443344adc6d8aba9182213fe [INFO] running `Command { std: "docker" "start" "-a" "13cdbb15253fb0e4f9f4916d6ba794a3cbcc175e443344adc6d8aba9182213fe", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024 [INFO] [stderr] Checking libc v0.2.33 [INFO] [stderr] Checking void v1.0.2 [INFO] [stderr] Compiling unicode-xid v0.0.4 [INFO] [stderr] Compiling quote v0.3.15 [INFO] [stderr] Checking textwrap v0.9.0 [INFO] [stderr] Checking lazy_static v0.2.9 [INFO] [stderr] Checking regex-syntax v0.4.1 [INFO] [stderr] Checking same-file v1.0.0 [INFO] [stderr] Checking unreachable v1.0.0 [INFO] [stderr] Checking utf8-ranges v1.0.0 [INFO] [stderr] Checking thread_local v0.3.4 [INFO] [stderr] Checking walkdir v2.0.1 [INFO] [stderr] Compiling synom v0.11.3 [INFO] [stderr] Checking memchr v1.0.2 [INFO] [stderr] Checking atty v0.2.3 [INFO] [stderr] Checking num_cpus v1.7.0 [INFO] [stderr] Compiling syn v0.11.11 [INFO] [stderr] Checking clap v2.27.1 [INFO] [stderr] Checking threadpool v1.7.1 [INFO] [stderr] Checking aho-corasick v0.6.3 [INFO] [stderr] Checking regex v0.2.2 [INFO] [stderr] Compiling structopt-derive v0.1.4 [INFO] [stderr] Checking structopt v0.1.4 [INFO] [stderr] Checking gsr v0.4.2 (/opt/rustwide/workdir) [INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `Once::new()` function is now preferred [INFO] [stdout] --> src/main.rs:174:9 [INFO] [stdout] | [INFO] [stdout] 174 | / lazy_static! { [INFO] [stdout] 175 | | static ref RE: Regex = Regex::new(r"\[.*ahead.*\]").unwrap(); [INFO] [stdout] 176 | | } [INFO] [stdout] | |_________^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `Once::new()` function is now preferred [INFO] [stdout] --> src/main.rs:174:9 [INFO] [stdout] | [INFO] [stdout] 174 | / lazy_static! { [INFO] [stdout] 175 | | static ref RE: Regex = Regex::new(r"\[.*ahead.*\]").unwrap(); [INFO] [stdout] 176 | | } [INFO] [stdout] | |_________^ [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `Once::new()` function is now preferred [INFO] [stdout] --> src/main.rs:187:9 [INFO] [stdout] | [INFO] [stdout] 187 | / lazy_static! { [INFO] [stdout] 188 | | static ref RE: Regex = Regex::new(r"\[.*behind.*\]").unwrap(); [INFO] [stdout] 189 | | } [INFO] [stdout] | |_________^ [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `Once::new()` function is now preferred [INFO] [stdout] --> src/main.rs:187:9 [INFO] [stdout] | [INFO] [stdout] 187 | / lazy_static! { [INFO] [stdout] 188 | | static ref RE: Regex = Regex::new(r"\[.*behind.*\]").unwrap(); [INFO] [stdout] 189 | | } [INFO] [stdout] | |_________^ [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the feature `attr_literals` has been stable since 1.30.0 and no longer requires an attribute to enable [INFO] [stdout] --> src/main.rs:1:12 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(attr_literals)] [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(stable_features)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `Once::new()` function is now preferred [INFO] [stdout] --> src/main.rs:174:9 [INFO] [stdout] | [INFO] [stdout] 174 | / lazy_static! { [INFO] [stdout] 175 | | static ref RE: Regex = Regex::new(r"\[.*ahead.*\]").unwrap(); [INFO] [stdout] 176 | | } [INFO] [stdout] | |_________^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `Once::new()` function is now preferred [INFO] [stdout] --> src/main.rs:174:9 [INFO] [stdout] | [INFO] [stdout] 174 | / lazy_static! { [INFO] [stdout] 175 | | static ref RE: Regex = Regex::new(r"\[.*ahead.*\]").unwrap(); [INFO] [stdout] 176 | | } [INFO] [stdout] | |_________^ [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `Once::new()` function is now preferred [INFO] [stdout] --> src/main.rs:187:9 [INFO] [stdout] | [INFO] [stdout] 187 | / lazy_static! { [INFO] [stdout] 188 | | static ref RE: Regex = Regex::new(r"\[.*behind.*\]").unwrap(); [INFO] [stdout] 189 | | } [INFO] [stdout] | |_________^ [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `Once::new()` function is now preferred [INFO] [stdout] --> src/main.rs:187:9 [INFO] [stdout] | [INFO] [stdout] 187 | / lazy_static! { [INFO] [stdout] 188 | | static ref RE: Regex = Regex::new(r"\[.*behind.*\]").unwrap(); [INFO] [stdout] 189 | | } [INFO] [stdout] | |_________^ [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the feature `attr_literals` has been stable since 1.30.0 and no longer requires an attribute to enable [INFO] [stdout] --> src/main.rs:1:12 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(attr_literals)] [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(stable_features)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `core::str::::trim_right`: superseded by `trim_end` [INFO] [stdout] --> src/main.rs:61:74 [INFO] [stdout] | [INFO] [stdout] 61 | return WalkDir::new(String::from_utf8_lossy(&out.stdout).trim_right()).max_depth(4); [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] help: replace the use of the deprecated method [INFO] [stdout] | [INFO] [stdout] 61 - return WalkDir::new(String::from_utf8_lossy(&out.stdout).trim_right()).max_depth(4); [INFO] [stdout] 61 + return WalkDir::new(String::from_utf8_lossy(&out.stdout).trim_end()).max_depth(4); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `core::str::::trim_right`: superseded by `trim_end` [INFO] [stdout] --> src/main.rs:61:74 [INFO] [stdout] | [INFO] [stdout] 61 | return WalkDir::new(String::from_utf8_lossy(&out.stdout).trim_right()).max_depth(4); [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] help: replace the use of the deprecated method [INFO] [stdout] | [INFO] [stdout] 61 - return WalkDir::new(String::from_utf8_lossy(&out.stdout).trim_right()).max_depth(4); [INFO] [stdout] 61 + return WalkDir::new(String::from_utf8_lossy(&out.stdout).trim_end()).max_depth(4); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item [INFO] [stdout] --> src/main.rs:23:10 [INFO] [stdout] | [INFO] [stdout] 23 | #[derive(StructOpt, Debug, Clone)] [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | `Opt` is not local [INFO] [stdout] | `StructOpt` is not local [INFO] [stdout] | move the `impl` block outside of this constant `_IMPL_STRUCTOPT_FOR_Opt` [INFO] [stdout] | [INFO] [stdout] = note: the derive macro `StructOpt` defines the non-local `impl`, and may need to be changed [INFO] [stdout] = note: the derive macro `StructOpt` may come from an old version of the `structopt_derive` crate, try updating your dependency with `cargo update -p structopt_derive` [INFO] [stdout] = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl` [INFO] [stdout] = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint [INFO] [stdout] = note: `#[warn(non_local_definitions)]` on by default [INFO] [stdout] = note: this warning originates in the derive macro `StructOpt` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item [INFO] [stdout] --> src/main.rs:23:10 [INFO] [stdout] | [INFO] [stdout] 23 | #[derive(StructOpt, Debug, Clone)] [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | `Opt` is not local [INFO] [stdout] | move the `impl` block outside of this constant `_IMPL_STRUCTOPT_FOR_Opt` [INFO] [stdout] | [INFO] [stdout] = note: the derive macro `StructOpt` defines the non-local `impl`, and may need to be changed [INFO] [stdout] = note: the derive macro `StructOpt` may come from an old version of the `structopt_derive` crate, try updating your dependency with `cargo update -p structopt_derive` [INFO] [stdout] = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl` [INFO] [stdout] = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint [INFO] [stdout] = note: this warning originates in the derive macro `StructOpt` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `collect` that must be used [INFO] [stdout] --> src/main.rs:73:9 [INFO] [stdout] | [INFO] [stdout] 73 | / walk_dir [INFO] [stdout] 74 | | .into_iter() [INFO] [stdout] 75 | | .map(|e| match e { [INFO] [stdout] 76 | | Ok(e) => { [INFO] [stdout] ... | [INFO] [stdout] 95 | | }) [INFO] [stdout] 96 | | .collect::>(); [INFO] [stdout] | |________________________________^ [INFO] [stdout] | [INFO] [stdout] = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead [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] 73 | let _ = walk_dir [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `collect` that must be used [INFO] [stdout] --> src/main.rs:218:5 [INFO] [stdout] | [INFO] [stdout] 218 | / gsrs.into_iter() [INFO] [stdout] 219 | | .map(|gsr| { [INFO] [stdout] 220 | | if opt.all { [INFO] [stdout] 221 | | print_gsr(&gsr, &opt); [INFO] [stdout] ... | [INFO] [stdout] 231 | | }) [INFO] [stdout] 232 | | .collect::>(); [INFO] [stdout] | |____________________________^ [INFO] [stdout] | [INFO] [stdout] = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 218 | let _ = gsrs.into_iter() [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item [INFO] [stdout] --> src/main.rs:23:10 [INFO] [stdout] | [INFO] [stdout] 23 | #[derive(StructOpt, Debug, Clone)] [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | `Opt` is not local [INFO] [stdout] | `StructOpt` is not local [INFO] [stdout] | move the `impl` block outside of this constant `_IMPL_STRUCTOPT_FOR_Opt` [INFO] [stdout] | [INFO] [stdout] = note: the derive macro `StructOpt` defines the non-local `impl`, and may need to be changed [INFO] [stdout] = note: the derive macro `StructOpt` may come from an old version of the `structopt_derive` crate, try updating your dependency with `cargo update -p structopt_derive` [INFO] [stdout] = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl` [INFO] [stdout] = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint [INFO] [stdout] = note: `#[warn(non_local_definitions)]` on by default [INFO] [stdout] = note: this warning originates in the derive macro `StructOpt` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item [INFO] [stdout] --> src/main.rs:23:10 [INFO] [stdout] | [INFO] [stdout] 23 | #[derive(StructOpt, Debug, Clone)] [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | `Opt` is not local [INFO] [stdout] | move the `impl` block outside of this constant `_IMPL_STRUCTOPT_FOR_Opt` [INFO] [stdout] | [INFO] [stdout] = note: the derive macro `StructOpt` defines the non-local `impl`, and may need to be changed [INFO] [stdout] = note: the derive macro `StructOpt` may come from an old version of the `structopt_derive` crate, try updating your dependency with `cargo update -p structopt_derive` [INFO] [stdout] = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl` [INFO] [stdout] = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint [INFO] [stdout] = note: this warning originates in the derive macro `StructOpt` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `collect` that must be used [INFO] [stdout] --> src/main.rs:73:9 [INFO] [stdout] | [INFO] [stdout] 73 | / walk_dir [INFO] [stdout] 74 | | .into_iter() [INFO] [stdout] 75 | | .map(|e| match e { [INFO] [stdout] 76 | | Ok(e) => { [INFO] [stdout] ... | [INFO] [stdout] 95 | | }) [INFO] [stdout] 96 | | .collect::>(); [INFO] [stdout] | |________________________________^ [INFO] [stdout] | [INFO] [stdout] = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead [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] 73 | let _ = walk_dir [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `collect` that must be used [INFO] [stdout] --> src/main.rs:218:5 [INFO] [stdout] | [INFO] [stdout] 218 | / gsrs.into_iter() [INFO] [stdout] 219 | | .map(|gsr| { [INFO] [stdout] 220 | | if opt.all { [INFO] [stdout] 221 | | print_gsr(&gsr, &opt); [INFO] [stdout] ... | [INFO] [stdout] 231 | | }) [INFO] [stdout] 232 | | .collect::>(); [INFO] [stdout] | |____________________________^ [INFO] [stdout] | [INFO] [stdout] = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 218 | let _ = gsrs.into_iter() [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.19s [INFO] running `Command { std: "docker" "inspect" "13cdbb15253fb0e4f9f4916d6ba794a3cbcc175e443344adc6d8aba9182213fe", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "13cdbb15253fb0e4f9f4916d6ba794a3cbcc175e443344adc6d8aba9182213fe", kill_on_drop: false }` [INFO] [stdout] 13cdbb15253fb0e4f9f4916d6ba794a3cbcc175e443344adc6d8aba9182213fe