Dec 17 17:14:16.584 INFO checking ravendyg/rust-playground against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 17:14:16.585 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-7/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/ravendyg/rust-playground:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 17:14:16.833 INFO [stdout] 9fa6591049b82a4bbd7ae8c19e572f1c566bacb3ff7b172def7d2b357d3a7872
Dec 17 17:14:16.833 INFO running `"docker" "start" "-a" "9fa6591049b82a4bbd7ae8c19e572f1c566bacb3ff7b172def7d2b357d3a7872"`
Dec 17 17:14:17.544 INFO [stderr]     Checking guessing v0.1.0 (/opt/crater/workdir)
Dec 17 17:14:17.688 INFO [stderr] warning: unused variable: `x`
Dec 17 17:14:17.688 INFO [stderr]   --> src/main.rs:60:7
Dec 17 17:14:17.688 INFO [stderr]    |
Dec 17 17:14:17.688 INFO [stderr] 60 |   let x: Option<i32> = Option::Some(5);
Dec 17 17:14:17.688 INFO [stderr]    |       ^ help: consider using `_x` instead
Dec 17 17:14:17.688 INFO [stderr]    |
Dec 17 17:14:17.688 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 17:14:17.688 INFO [stderr] 
Dec 17 17:14:17.688 INFO [stderr] warning: unused variable: `q`
Dec 17 17:14:17.688 INFO [stderr]   --> src/main.rs:62:7
Dec 17 17:14:17.688 INFO [stderr]    |
Dec 17 17:14:17.688 INFO [stderr] 62 |   let q: Option<f64> = Option::Some(5f64);
Dec 17 17:14:17.688 INFO [stderr]    |       ^ help: consider using `_q` instead
Dec 17 17:14:17.688 INFO [stderr] 
Dec 17 17:14:17.688 INFO [stderr] warning: unused variable: `b`
Dec 17 17:14:17.688 INFO [stderr]   --> src/main.rs:71:7
Dec 17 17:14:17.688 INFO [stderr]    |
Dec 17 17:14:17.688 INFO [stderr] 71 |   let b = 10;
Dec 17 17:14:17.688 INFO [stderr]    |       ^ help: consider using `_b` instead
Dec 17 17:14:17.688 INFO [stderr] 
Dec 17 17:14:17.688 INFO [stderr] warning: variant is never constructed: `None`
Dec 17 17:14:17.688 INFO [stderr]   --> src/main.rs:49:3
Dec 17 17:14:17.688 INFO [stderr]    |
Dec 17 17:14:17.688 INFO [stderr] 49 |   None
Dec 17 17:14:17.688 INFO [stderr]    |   ^^^^
Dec 17 17:14:17.688 INFO [stderr]    |
Dec 17 17:14:17.688 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 17:14:17.688 INFO [stderr] 
Dec 17 17:14:17.688 INFO [stderr] warning: enum is never used: `Result`
Dec 17 17:14:17.688 INFO [stderr]   --> src/main.rs:53:1
Dec 17 17:14:17.688 INFO [stderr]    |
Dec 17 17:14:17.688 INFO [stderr] 53 | enum Result<T, E> {
Dec 17 17:14:17.688 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 17 17:14:17.688 INFO [stderr] 
Dec 17 17:14:17.702 INFO [stderr] warning: unused variable: `x`
Dec 17 17:14:17.702 INFO [stderr]   --> src/main.rs:60:7
Dec 17 17:14:17.702 INFO [stderr]    |
Dec 17 17:14:17.702 INFO [stderr] 60 |   let x: Option<i32> = Option::Some(5);
Dec 17 17:14:17.702 INFO [stderr]    |       ^ help: consider using `_x` instead
Dec 17 17:14:17.702 INFO [stderr]    |
Dec 17 17:14:17.702 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 17:14:17.702 INFO [stderr] 
Dec 17 17:14:17.702 INFO [stderr] warning: unused variable: `q`
Dec 17 17:14:17.702 INFO [stderr]   --> src/main.rs:62:7
Dec 17 17:14:17.702 INFO [stderr]    |
Dec 17 17:14:17.702 INFO [stderr] 62 |   let q: Option<f64> = Option::Some(5f64);
Dec 17 17:14:17.702 INFO [stderr]    |       ^ help: consider using `_q` instead
Dec 17 17:14:17.702 INFO [stderr] 
Dec 17 17:14:17.702 INFO [stderr] warning: unused variable: `b`
Dec 17 17:14:17.702 INFO [stderr]   --> src/main.rs:71:7
Dec 17 17:14:17.702 INFO [stderr]    |
Dec 17 17:14:17.702 INFO [stderr] 71 |   let b = 10;
Dec 17 17:14:17.702 INFO [stderr]    |       ^ help: consider using `_b` instead
Dec 17 17:14:17.702 INFO [stderr] 
Dec 17 17:14:17.704 INFO [stderr] warning: variant is never constructed: `None`
Dec 17 17:14:17.705 INFO [stderr]   --> src/main.rs:49:3
Dec 17 17:14:17.705 INFO [stderr]    |
Dec 17 17:14:17.705 INFO [stderr] 49 |   None
Dec 17 17:14:17.705 INFO [stderr]    |   ^^^^
Dec 17 17:14:17.705 INFO [stderr]    |
Dec 17 17:14:17.705 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 17:14:17.705 INFO [stderr] 
Dec 17 17:14:17.705 INFO [stderr] warning: enum is never used: `Result`
Dec 17 17:14:17.705 INFO [stderr]   --> src/main.rs:53:1
Dec 17 17:14:17.705 INFO [stderr]    |
Dec 17 17:14:17.705 INFO [stderr] 53 | enum Result<T, E> {
Dec 17 17:14:17.705 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 17 17:14:17.705 INFO [stderr] 
Dec 17 17:14:17.722 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.20s
Dec 17 17:14:18.099 INFO running `"docker" "inspect" "9fa6591049b82a4bbd7ae8c19e572f1c566bacb3ff7b172def7d2b357d3a7872"`
Dec 17 17:14:18.187 INFO running `"docker" "rm" "-f" "9fa6591049b82a4bbd7ae8c19e572f1c566bacb3ff7b172def7d2b357d3a7872"`
Dec 17 17:14:18.339 INFO [stdout] 9fa6591049b82a4bbd7ae8c19e572f1c566bacb3ff7b172def7d2b357d3a7872