[INFO] cloning repository https://github.com/bkylele/mywm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bkylele/mywm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbkylele%2Fmywm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbkylele%2Fmywm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 362c1db4aa1a86fa31da5a040d2ecdb813bf3d0f
[INFO] checking bkylele/mywm against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbkylele%2Fmywm" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/bkylele/mywm
[INFO] finished tweaking git repo https://github.com/bkylele/mywm
[INFO] tweaked toml for git repo https://github.com/bkylele/mywm written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/bkylele/mywm on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/bkylele/mywm 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d285489aa36f0f6250bb2fcf68de767cbdde3a0bda45133c5da15d256e5a6cb3
[INFO] running `Command { std: "docker" "start" "-a" "d285489aa36f0f6250bb2fcf68de767cbdde3a0bda45133c5da15d256e5a6cb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d285489aa36f0f6250bb2fcf68de767cbdde3a0bda45133c5da15d256e5a6cb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d285489aa36f0f6250bb2fcf68de767cbdde3a0bda45133c5da15d256e5a6cb3", kill_on_drop: false }`
[INFO] [stdout] d285489aa36f0f6250bb2fcf68de767cbdde3a0bda45133c5da15d256e5a6cb3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dunmustuse_in_always_ok" "-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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5906a6a500c4965f5599eee2138facddf54d88d529a702b7f0fc7b86982de853
[INFO] running `Command { std: "docker" "start" "-a" "5906a6a500c4965f5599eee2138facddf54d88d529a702b7f0fc7b86982de853", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustix v0.38.42
[INFO] [stderr]     Checking linux-raw-sys v0.4.14
[INFO] [stderr]     Checking x11rb-protocol v0.13.1
[INFO] [stderr]     Checking x11rb v0.13.1
[INFO] [stderr]     Checking mywm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ConnectionError`
[INFO] [stdout]  --> src/main.rs:9:33
[INFO] [stdout]   |
[INFO] [stdout] 9 | use x11rb::errors::{ReplyError, ConnectionError};
[INFO] [stdout]   |                                 ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ConnectionError`
[INFO] [stdout]  --> src/main.rs:9:33
[INFO] [stdout]   |
[INFO] [stdout] 9 | use x11rb::errors::{ReplyError, ConnectionError};
[INFO] [stdout]   |                                 ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:121:5
[INFO] [stdout]     |
[INFO] [stdout] 103 | /     loop {
[INFO] [stdout] 104 | |         let event = conn.wait_for_event()?;
[INFO] [stdout] 105 | |
[INFO] [stdout] 106 | |         match event {
[INFO] [stdout] ...   |
[INFO] [stdout] 119 | |     }
[INFO] [stdout]     | |_____- any code following this expression is unreachable
[INFO] [stdout] 120 |
[INFO] [stdout] 121 |       Ok(())
[INFO] [stdout]     |       ^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:121:5
[INFO] [stdout]     |
[INFO] [stdout] 103 | /     loop {
[INFO] [stdout] 104 | |         let event = conn.wait_for_event()?;
[INFO] [stdout] 105 | |
[INFO] [stdout] 106 | |         match event {
[INFO] [stdout] ...   |
[INFO] [stdout] 119 | |     }
[INFO] [stdout]     | |_____- any code following this expression is unreachable
[INFO] [stdout] 120 |
[INFO] [stdout] 121 |       Ok(())
[INFO] [stdout]     |       ^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `window`, `frame_window`, `x`, `y`, and `width` are never read
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct WindowState {
[INFO] [stdout]    |        ----------- fields in this struct
[INFO] [stdout] 16 |     window: Window,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 17 |     frame_window: Window,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 18 |     x: i16,
[INFO] [stdout]    |     ^
[INFO] [stdout] 19 |     y: i16,
[INFO] [stdout]    |     ^
[INFO] [stdout] 20 |     width: u16,    
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `WindowState` 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: fields `screen_num` and `windows` are never read
[INFO] [stdout]   --> src/main.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 53 | struct WmState<'a, C: Connection> {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] 54 |     conn: &'a C, // the lifetime of this reference must not outlive the original connection
[INFO] [stdout] 55 |     screen_num: usize,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 56 |     // black_gc: Gcontext,
[INFO] [stdout] 57 |     windows: Vec<WindowState>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `WmState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `window`, `frame_window`, `x`, `y`, and `width` are never read
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct WindowState {
[INFO] [stdout]    |        ----------- fields in this struct
[INFO] [stdout] 16 |     window: Window,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 17 |     frame_window: Window,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 18 |     x: i16,
[INFO] [stdout]    |     ^
[INFO] [stdout] 19 |     y: i16,
[INFO] [stdout]    |     ^
[INFO] [stdout] 20 |     width: u16,    
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `WindowState` 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: fields `screen_num` and `windows` are never read
[INFO] [stdout]   --> src/main.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 53 | struct WmState<'a, C: Connection> {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] 54 |     conn: &'a C, // the lifetime of this reference must not outlive the original connection
[INFO] [stdout] 55 |     screen_num: usize,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 56 |     // black_gc: Gcontext,
[INFO] [stdout] 57 |     windows: Vec<WindowState>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `WmState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.93s
[INFO] running `Command { std: "docker" "inspect" "5906a6a500c4965f5599eee2138facddf54d88d529a702b7f0fc7b86982de853", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5906a6a500c4965f5599eee2138facddf54d88d529a702b7f0fc7b86982de853", kill_on_drop: false }`
[INFO] [stdout] 5906a6a500c4965f5599eee2138facddf54d88d529a702b7f0fc7b86982de853