[INFO] cloning repository https://github.com/malam111/apakabar [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/malam111/apakabar" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmalam111%2Fapakabar", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmalam111%2Fapakabar'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 5b963b517373de5c9cdbff242d9bed07a2f033c1 [INFO] checking malam111/apakabar against try#df1b9bf194c9183fb7c0604484171064069ce232 for pr-149195-4 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmalam111%2Fapakabar" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/malam111/apakabar [INFO] finished tweaking git repo https://github.com/malam111/apakabar [INFO] tweaked toml for git repo https://github.com/malam111/apakabar written to /workspace/builds/worker-3-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/malam111/apakabar on toolchain df1b9bf194c9183fb7c0604484171064069ce232 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+df1b9bf194c9183fb7c0604484171064069ce232" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/malam111/apakabar 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" "+df1b9bf194c9183fb7c0604484171064069ce232" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:29356a839a4d14451438f794ce8414e707d72405f44418718d724d22562fe786" "/opt/rustwide/cargo-home/bin/cargo" "+df1b9bf194c9183fb7c0604484171064069ce232" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] e27712727d613648ff25031387470f7b0faa44101827e520cf5a141f0e3348ce [INFO] running `Command { std: "docker" "start" "-a" "e27712727d613648ff25031387470f7b0faa44101827e520cf5a141f0e3348ce", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "e27712727d613648ff25031387470f7b0faa44101827e520cf5a141f0e3348ce", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e27712727d613648ff25031387470f7b0faa44101827e520cf5a141f0e3348ce", kill_on_drop: false }` [INFO] [stdout] e27712727d613648ff25031387470f7b0faa44101827e520cf5a141f0e3348ce [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:29356a839a4d14451438f794ce8414e707d72405f44418718d724d22562fe786" "/opt/rustwide/cargo-home/bin/cargo" "+df1b9bf194c9183fb7c0604484171064069ce232" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 395585f8a0acb333bec759e6ef0bee24185b553f9c21a249186279b5c2a5649c [INFO] running `Command { std: "docker" "start" "-a" "395585f8a0acb333bec759e6ef0bee24185b553f9c21a249186279b5c2a5649c", kill_on_drop: false }` [INFO] [stderr] Checking brightness v0.1.0 (/opt/rustwide/workdir/utils/brightness) [INFO] [stderr] Checking battery v0.1.0 (/opt/rustwide/workdir/utils/battery) [INFO] [stderr] Checking memory v0.1.0 (/opt/rustwide/workdir/utils/memory) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> utils/brightness/src/brightness.rs:58:21 [INFO] [stdout] | [INFO] [stdout] 58 | pub fn discover(mut self) -> io::Result> { [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `max` is never read [INFO] [stdout] --> utils/brightness/src/brightness.rs:35:5 [INFO] [stdout] | [INFO] [stdout] 32 | pub struct BrightnessBuilder { [INFO] [stdout] | ----------------- field in this struct [INFO] [stdout] ... [INFO] [stdout] 35 | max: Option, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> utils/memory/src/memory.rs:72:21 [INFO] [stdout] | [INFO] [stdout] 72 | pub fn discover(mut self) -> io::Result> { [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> utils/brightness/src/brightness.rs:85:13 [INFO] [stdout] | [INFO] [stdout] 85 | reader.seek(io::SeekFrom::Start(0)); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 85 | let _ = reader.seek(io::SeekFrom::Start(0)); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> utils/brightness/src/brightness.rs:86:13 [INFO] [stdout] | [INFO] [stdout] 86 | reader.read_to_string(&mut buffer); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 86 | let _ = reader.read_to_string(&mut buffer); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> utils/memory/src/memory.rs:89:13 [INFO] [stdout] | [INFO] [stdout] 89 | reader.seek(io::SeekFrom::Start(0)); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 89 | let _ = reader.seek(io::SeekFrom::Start(0)); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> utils/memory/src/memory.rs:90:13 [INFO] [stdout] | [INFO] [stdout] 90 | reader.read_to_string(&mut buffer); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 90 | let _ = reader.read_to_string(&mut buffer); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `path` is never read [INFO] [stdout] --> utils/battery/src/battery.rs:112:5 [INFO] [stdout] | [INFO] [stdout] 111 | struct Uevent { [INFO] [stdout] | ------ field in this struct [INFO] [stdout] 112 | path: PathBuf, [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Uevent` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> utils/battery/src/battery.rs:62:26 [INFO] [stdout] | [INFO] [stdout] 62 | pub fn builder(path: &str) -> Result { [INFO] [stdout] | ^^^^ ^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 62 | pub fn builder(path: &str) -> Result, io::Error> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type [INFO] [stdout] --> utils/battery/src/battery.rs:86:19 [INFO] [stdout] | [INFO] [stdout] 86 | ).unwrap().clone().into(); [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(suspicious_double_ref_op)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type [INFO] [stdout] --> utils/battery/src/battery.rs:90:19 [INFO] [stdout] | [INFO] [stdout] 90 | ).unwrap().clone().to_string(); [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Map` that must be used [INFO] [stdout] --> utils/battery/src/battery.rs:195:9 [INFO] [stdout] | [INFO] [stdout] 195 | / paths.iter().map(|&path| { [INFO] [stdout] 196 | | let path = Path::new(&path).to_path_buf(); [INFO] [stdout] 197 | | let file = File::open(&path).unwrap(); [INFO] [stdout] 198 | | let reader = io::BufReader::new(file); [INFO] [stdout] ... | [INFO] [stdout] 205 | | () [INFO] [stdout] 206 | | }); [INFO] [stdout] | |__________^ [INFO] [stdout] | [INFO] [stdout] = note: iterators are lazy and do nothing unless consumed [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] 195 | let _ = paths.iter().map(|&path| { [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `Iterator::map` call that discard the iterator's values [INFO] [stdout] --> utils/battery/src/battery.rs:195:22 [INFO] [stdout] | [INFO] [stdout] 195 | paths.iter().map(|&path| { [INFO] [stdout] | ^ ------- [INFO] [stdout] | | | [INFO] [stdout] | _______________________|___this function returns `()`, which is likely not what you wanted [INFO] [stdout] | | ______________________| [INFO] [stdout] | || [INFO] [stdout] 196 | || let path = Path::new(&path).to_path_buf(); [INFO] [stdout] 197 | || let file = File::open(&path).unwrap(); [INFO] [stdout] 198 | || let reader = io::BufReader::new(file); [INFO] [stdout] ... || [INFO] [stdout] 205 | || () [INFO] [stdout] 206 | || }); [INFO] [stdout] | ||_________-^ after this call to map, the resulting iterator is `impl Iterator`, which means the only information carried by the iterator is the number of items [INFO] [stdout] | |__________| [INFO] [stdout] | called `Iterator::map` with callable that returns `()` [INFO] [stdout] | [INFO] [stdout] = note: `Iterator::map`, like many of the methods on `Iterator`, gets executed lazily, meaning that its effects won't be visible until it is iterated [INFO] [stdout] = note: `#[warn(map_unit_fn)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: you might have meant to use `Iterator::for_each` [INFO] [stdout] | [INFO] [stdout] 195 - paths.iter().map(|&path| { [INFO] [stdout] 195 + paths.iter().for_each(|&path| { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> utils/battery/src/battery.rs:199:13 [INFO] [stdout] | [INFO] [stdout] 199 | / &self.uevents.push( [INFO] [stdout] 200 | | Uevent { [INFO] [stdout] 201 | | path, [INFO] [stdout] 202 | | reader, [INFO] [stdout] 203 | | } [INFO] [stdout] 204 | | ); [INFO] [stdout] | |_____________^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 199 | let _ = &self.uevents.push( [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> utils/battery/src/battery.rs:257:13 [INFO] [stdout] | [INFO] [stdout] 257 | uevent.reader.seek(io::SeekFrom::Start(0)); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 257 | let _ = uevent.reader.seek(io::SeekFrom::Start(0)); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> utils/battery/src/battery.rs:258:13 [INFO] [stdout] | [INFO] [stdout] 258 | uevent.reader.read_to_string(&mut buffer); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 258 | let _ = uevent.reader.read_to_string(&mut buffer); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking apakabar v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | FrontEnd::main_loop(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 4 | let _ = FrontEnd::main_loop(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | FrontEnd::main_loop(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 4 | let _ = FrontEnd::main_loop(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s [INFO] running `Command { std: "docker" "inspect" "395585f8a0acb333bec759e6ef0bee24185b553f9c21a249186279b5c2a5649c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "395585f8a0acb333bec759e6ef0bee24185b553f9c21a249186279b5c2a5649c", kill_on_drop: false }` [INFO] [stdout] 395585f8a0acb333bec759e6ef0bee24185b553f9c21a249186279b5c2a5649c