Dec 12 01:43:53.470 INFO checking LiteUnder/testing_rust against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 12 01:43:53.470 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-1/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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 12 01:43:53.711 INFO [stdout] 6a3ef5b32b21a8f0c6b2d35882de8c0d13a963cb62cc2740f4c43e2ea608b562
Dec 12 01:43:53.713 INFO running `"docker" "start" "-a" "6a3ef5b32b21a8f0c6b2d35882de8c0d13a963cb62cc2740f4c43e2ea608b562"`
Dec 12 01:43:54.070 INFO [stderr] usermod: no changes
Dec 12 01:43:54.098 INFO [stderr]     Checking testing_rust v0.1.0 (/source)
Dec 12 01:43:54.495 INFO [stderr] warning: unused variable: `x`
Dec 12 01:43:54.495 INFO [stderr]   --> src/main.rs:12:9
Dec 12 01:43:54.495 INFO [stderr]    |
Dec 12 01:43:54.495 INFO [stderr] 12 |     let x = Some(5);
Dec 12 01:43:54.495 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 12 01:43:54.495 INFO [stderr]    |
Dec 12 01:43:54.495 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 12 01:43:54.495 INFO [stderr] 
Dec 12 01:43:54.495 INFO [stderr] warning: unused variable: `y`
Dec 12 01:43:54.495 INFO [stderr]   --> src/main.rs:13:9
Dec 12 01:43:54.495 INFO [stderr]    |
Dec 12 01:43:54.495 INFO [stderr] 13 |     let y: Option<i8> = None;
Dec 12 01:43:54.495 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 12 01:43:54.495 INFO [stderr] 
Dec 12 01:43:54.556 INFO [stderr] warning: unused variable: `x`
Dec 12 01:43:54.556 INFO [stderr]   --> src/main.rs:12:9
Dec 12 01:43:54.556 INFO [stderr]    |
Dec 12 01:43:54.556 INFO [stderr] 12 |     let x = Some(5);
Dec 12 01:43:54.556 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 12 01:43:54.556 INFO [stderr]    |
Dec 12 01:43:54.556 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 12 01:43:54.556 INFO [stderr] 
Dec 12 01:43:54.556 INFO [stderr] warning: unused variable: `y`
Dec 12 01:43:54.556 INFO [stderr]   --> src/main.rs:13:9
Dec 12 01:43:54.556 INFO [stderr]    |
Dec 12 01:43:54.556 INFO [stderr] 13 |     let y: Option<i8> = None;
Dec 12 01:43:54.556 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 12 01:43:54.556 INFO [stderr] 
Dec 12 01:43:54.573 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
Dec 12 01:43:54.574 INFO [stderr] su: No module specific data is present
Dec 12 01:43:55.028 INFO running `"docker" "inspect" "6a3ef5b32b21a8f0c6b2d35882de8c0d13a963cb62cc2740f4c43e2ea608b562"`
Dec 12 01:43:55.141 INFO running `"docker" "rm" "-f" "6a3ef5b32b21a8f0c6b2d35882de8c0d13a963cb62cc2740f4c43e2ea608b562"`
Dec 12 01:43:55.263 INFO [stdout] 6a3ef5b32b21a8f0c6b2d35882de8c0d13a963cb62cc2740f4c43e2ea608b562