Dec 04 11:52:15.425 INFO checking ravendyg/rust-playground against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 11:52:15.425 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-0/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1df97983eb2057dc6a8f7eb364e263b51ae23230-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 04 11:52:15.665 INFO [stdout] 0520b1119c62689999ef67b0006077d185cc33ba7c40d1c5addab0f23e78476f
Dec 04 11:52:15.667 INFO running `"docker" "start" "-a" "0520b1119c62689999ef67b0006077d185cc33ba7c40d1c5addab0f23e78476f"`
Dec 04 11:52:16.340 INFO [stderr] usermod: no changes
Dec 04 11:52:16.371 INFO [stderr]     Checking guessing v0.1.0 (/source)
Dec 04 11:52:16.571 INFO [stderr] warning: unused variable: `x`
Dec 04 11:52:16.571 INFO [stderr]   --> src/main.rs:60:7
Dec 04 11:52:16.571 INFO [stderr]    |
Dec 04 11:52:16.571 INFO [stderr] 60 |   let x: Option<i32> = Option::Some(5);
Dec 04 11:52:16.571 INFO [stderr]    |       ^ help: consider using `_x` instead
Dec 04 11:52:16.571 INFO [stderr]    |
Dec 04 11:52:16.571 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 11:52:16.571 INFO [stderr] 
Dec 04 11:52:16.571 INFO [stderr] warning: unused variable: `q`
Dec 04 11:52:16.571 INFO [stderr]   --> src/main.rs:62:7
Dec 04 11:52:16.571 INFO [stderr]    |
Dec 04 11:52:16.571 INFO [stderr] 62 |   let q: Option<f64> = Option::Some(5f64);
Dec 04 11:52:16.571 INFO [stderr]    |       ^ help: consider using `_q` instead
Dec 04 11:52:16.571 INFO [stderr] 
Dec 04 11:52:16.571 INFO [stderr] warning: unused variable: `b`
Dec 04 11:52:16.571 INFO [stderr]   --> src/main.rs:71:7
Dec 04 11:52:16.571 INFO [stderr]    |
Dec 04 11:52:16.571 INFO [stderr] 71 |   let b = 10;
Dec 04 11:52:16.571 INFO [stderr]    |       ^ help: consider using `_b` instead
Dec 04 11:52:16.571 INFO [stderr] 
Dec 04 11:52:16.571 INFO [stderr] warning: variant is never constructed: `None`
Dec 04 11:52:16.571 INFO [stderr]   --> src/main.rs:49:3
Dec 04 11:52:16.571 INFO [stderr]    |
Dec 04 11:52:16.571 INFO [stderr] 49 |   None
Dec 04 11:52:16.571 INFO [stderr]    |   ^^^^
Dec 04 11:52:16.571 INFO [stderr]    |
Dec 04 11:52:16.571 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 11:52:16.571 INFO [stderr] 
Dec 04 11:52:16.571 INFO [stderr] warning: enum is never used: `Result`
Dec 04 11:52:16.571 INFO [stderr]   --> src/main.rs:53:1
Dec 04 11:52:16.571 INFO [stderr]    |
Dec 04 11:52:16.571 INFO [stderr] 53 | enum Result<T, E> {
Dec 04 11:52:16.571 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 04 11:52:16.571 INFO [stderr] 
Dec 04 11:52:16.637 INFO [stderr] warning: unused variable: `x`
Dec 04 11:52:16.638 INFO [stderr]   --> src/main.rs:60:7
Dec 04 11:52:16.638 INFO [stderr]    |
Dec 04 11:52:16.638 INFO [stderr] 60 |   let x: Option<i32> = Option::Some(5);
Dec 04 11:52:16.638 INFO [stderr]    |       ^ help: consider using `_x` instead
Dec 04 11:52:16.638 INFO [stderr]    |
Dec 04 11:52:16.638 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 11:52:16.638 INFO [stderr] 
Dec 04 11:52:16.638 INFO [stderr] warning: unused variable: `q`
Dec 04 11:52:16.638 INFO [stderr]   --> src/main.rs:62:7
Dec 04 11:52:16.638 INFO [stderr]    |
Dec 04 11:52:16.638 INFO [stderr] 62 |   let q: Option<f64> = Option::Some(5f64);
Dec 04 11:52:16.638 INFO [stderr]    |       ^ help: consider using `_q` instead
Dec 04 11:52:16.638 INFO [stderr] 
Dec 04 11:52:16.638 INFO [stderr] warning: unused variable: `b`
Dec 04 11:52:16.638 INFO [stderr]   --> src/main.rs:71:7
Dec 04 11:52:16.638 INFO [stderr]    |
Dec 04 11:52:16.638 INFO [stderr] 71 |   let b = 10;
Dec 04 11:52:16.638 INFO [stderr]    |       ^ help: consider using `_b` instead
Dec 04 11:52:16.638 INFO [stderr] 
Dec 04 11:52:16.642 INFO [stderr] warning: variant is never constructed: `None`
Dec 04 11:52:16.642 INFO [stderr]   --> src/main.rs:49:3
Dec 04 11:52:16.642 INFO [stderr]    |
Dec 04 11:52:16.642 INFO [stderr] 49 |   None
Dec 04 11:52:16.642 INFO [stderr]    |   ^^^^
Dec 04 11:52:16.642 INFO [stderr]    |
Dec 04 11:52:16.642 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 11:52:16.642 INFO [stderr] 
Dec 04 11:52:16.642 INFO [stderr] warning: enum is never used: `Result`
Dec 04 11:52:16.642 INFO [stderr]   --> src/main.rs:53:1
Dec 04 11:52:16.642 INFO [stderr]    |
Dec 04 11:52:16.642 INFO [stderr] 53 | enum Result<T, E> {
Dec 04 11:52:16.642 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 04 11:52:16.642 INFO [stderr] 
Dec 04 11:52:16.667 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.31s
Dec 04 11:52:16.668 INFO [stderr] su: No module specific data is present
Dec 04 11:52:16.965 INFO running `"docker" "inspect" "0520b1119c62689999ef67b0006077d185cc33ba7c40d1c5addab0f23e78476f"`
Dec 04 11:52:17.049 INFO running `"docker" "rm" "-f" "0520b1119c62689999ef67b0006077d185cc33ba7c40d1c5addab0f23e78476f"`
Dec 04 11:52:17.140 INFO [stdout] 0520b1119c62689999ef67b0006077d185cc33ba7c40d1c5addab0f23e78476f