[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#54bb9bb1bbe87f59b5a2e9afea4c8cedcf5e0b47 for pr-153041
[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 54bb9bb1bbe87f59b5a2e9afea4c8cedcf5e0b47
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+54bb9bb1bbe87f59b5a2e9afea4c8cedcf5e0b47" "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" "+54bb9bb1bbe87f59b5a2e9afea4c8cedcf5e0b47" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking malam111/apakabar against try#54bb9bb1bbe87f59b5a2e9afea4c8cedcf5e0b47 for pr-153041
[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 54bb9bb1bbe87f59b5a2e9afea4c8cedcf5e0b47
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+54bb9bb1bbe87f59b5a2e9afea4c8cedcf5e0b47" "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" "+54bb9bb1bbe87f59b5a2e9afea4c8cedcf5e0b47" "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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+54bb9bb1bbe87f59b5a2e9afea4c8cedcf5e0b47" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 432fabdd924d3404438ce61b5b867d6db5d1270d2a7f1c03eb960d22d8aea1f3
[INFO] running `Command { std: "docker" "start" "-a" "432fabdd924d3404438ce61b5b867d6db5d1270d2a7f1c03eb960d22d8aea1f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "432fabdd924d3404438ce61b5b867d6db5d1270d2a7f1c03eb960d22d8aea1f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "432fabdd924d3404438ce61b5b867d6db5d1270d2a7f1c03eb960d22d8aea1f3", kill_on_drop: false }`
[INFO] [stdout] 432fabdd924d3404438ce61b5b867d6db5d1270d2a7f1c03eb960d22d8aea1f3
[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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+54bb9bb1bbe87f59b5a2e9afea4c8cedcf5e0b47" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 89d0122b8feae71becf3d68813d9c7631c621c60897449ab46d20e1b5ddbaea7
[INFO] running `Command { std: "docker" "start" "-a" "89d0122b8feae71becf3d68813d9c7631c621c60897449ab46d20e1b5ddbaea7", kill_on_drop: false }`
[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] [stderr]     Checking brightness v0.1.0 (/opt/rustwide/workdir/utils/brightness)
[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<BrightnessBuilder<BuildReady>> {
[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<T> {
[INFO] [stdout]    |            ----------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 35 |     max: Option<u16>,
[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<MemoryBuilder<BuildReady>> {
[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/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: 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: 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<BatteryBuilder, io::Error> {
[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<BatteryBuilder<'_>, 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<Item = ()>`, 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 0.20s
[INFO] running `Command { std: "docker" "inspect" "89d0122b8feae71becf3d68813d9c7631c621c60897449ab46d20e1b5ddbaea7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89d0122b8feae71becf3d68813d9c7631c621c60897449ab46d20e1b5ddbaea7", kill_on_drop: false }`
[INFO] [stdout] 89d0122b8feae71becf3d68813d9c7631c621c60897449ab46d20e1b5ddbaea7
