Dec 19 10:23:10.884 INFO checking ravendyg/rust-playground against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 10:23:10.884 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 10:23:11.138 INFO [stdout] 4f30273c06cf316b8caee001e24024605ac4d909714408c2dd9ee11e857b846f
Dec 19 10:23:11.186 INFO running `"docker" "start" "-a" "4f30273c06cf316b8caee001e24024605ac4d909714408c2dd9ee11e857b846f"`
Dec 19 10:23:11.809 INFO [stderr]     Checking guessing v0.1.0 (/opt/crater/workdir)
Dec 19 10:23:11.927 INFO [stderr] warning: unused variable: `x`
Dec 19 10:23:11.927 INFO [stderr]   --> src/main.rs:60:7
Dec 19 10:23:11.927 INFO [stderr]    |
Dec 19 10:23:11.927 INFO [stderr] 60 |   let x: Option<i32> = Option::Some(5);
Dec 19 10:23:11.927 INFO [stderr]    |       ^ help: consider using `_x` instead
Dec 19 10:23:11.927 INFO [stderr]    |
Dec 19 10:23:11.927 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 10:23:11.927 INFO [stderr] 
Dec 19 10:23:11.927 INFO [stderr] warning: unused variable: `q`
Dec 19 10:23:11.927 INFO [stderr]   --> src/main.rs:62:7
Dec 19 10:23:11.927 INFO [stderr]    |
Dec 19 10:23:11.927 INFO [stderr] 62 |   let q: Option<f64> = Option::Some(5f64);
Dec 19 10:23:11.927 INFO [stderr]    |       ^ help: consider using `_q` instead
Dec 19 10:23:11.927 INFO [stderr] 
Dec 19 10:23:11.927 INFO [stderr] warning: unused variable: `b`
Dec 19 10:23:11.927 INFO [stderr]   --> src/main.rs:71:7
Dec 19 10:23:11.927 INFO [stderr]    |
Dec 19 10:23:11.927 INFO [stderr] 71 |   let b = 10;
Dec 19 10:23:11.927 INFO [stderr]    |       ^ help: consider using `_b` instead
Dec 19 10:23:11.927 INFO [stderr] 
Dec 19 10:23:11.929 INFO [stderr] warning: variant is never constructed: `None`
Dec 19 10:23:11.930 INFO [stderr]   --> src/main.rs:49:3
Dec 19 10:23:11.930 INFO [stderr]    |
Dec 19 10:23:11.930 INFO [stderr] 49 |   None
Dec 19 10:23:11.930 INFO [stderr]    |   ^^^^
Dec 19 10:23:11.930 INFO [stderr]    |
Dec 19 10:23:11.930 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 10:23:11.930 INFO [stderr] 
Dec 19 10:23:11.930 INFO [stderr] warning: enum is never used: `Result`
Dec 19 10:23:11.930 INFO [stderr]   --> src/main.rs:53:1
Dec 19 10:23:11.930 INFO [stderr]    |
Dec 19 10:23:11.930 INFO [stderr] 53 | enum Result<T, E> {
Dec 19 10:23:11.930 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 19 10:23:11.930 INFO [stderr] 
Dec 19 10:23:11.951 INFO [stderr] warning: unused variable: `x`
Dec 19 10:23:11.951 INFO [stderr]   --> src/main.rs:60:7
Dec 19 10:23:11.951 INFO [stderr]    |
Dec 19 10:23:11.951 INFO [stderr] 60 |   let x: Option<i32> = Option::Some(5);
Dec 19 10:23:11.951 INFO [stderr]    |       ^ help: consider using `_x` instead
Dec 19 10:23:11.951 INFO [stderr]    |
Dec 19 10:23:11.951 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 10:23:11.951 INFO [stderr] 
Dec 19 10:23:11.951 INFO [stderr] warning: unused variable: `q`
Dec 19 10:23:11.951 INFO [stderr]   --> src/main.rs:62:7
Dec 19 10:23:11.951 INFO [stderr]    |
Dec 19 10:23:11.951 INFO [stderr] 62 |   let q: Option<f64> = Option::Some(5f64);
Dec 19 10:23:11.951 INFO [stderr]    |       ^ help: consider using `_q` instead
Dec 19 10:23:11.951 INFO [stderr] 
Dec 19 10:23:11.951 INFO [stderr] warning: unused variable: `b`
Dec 19 10:23:11.951 INFO [stderr]   --> src/main.rs:71:7
Dec 19 10:23:11.951 INFO [stderr]    |
Dec 19 10:23:11.951 INFO [stderr] 71 |   let b = 10;
Dec 19 10:23:11.951 INFO [stderr]    |       ^ help: consider using `_b` instead
Dec 19 10:23:11.951 INFO [stderr] 
Dec 19 10:23:11.956 INFO [stderr] warning: variant is never constructed: `None`
Dec 19 10:23:11.956 INFO [stderr]   --> src/main.rs:49:3
Dec 19 10:23:11.956 INFO [stderr]    |
Dec 19 10:23:11.956 INFO [stderr] 49 |   None
Dec 19 10:23:11.956 INFO [stderr]    |   ^^^^
Dec 19 10:23:11.956 INFO [stderr]    |
Dec 19 10:23:11.956 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 10:23:11.956 INFO [stderr] 
Dec 19 10:23:11.956 INFO [stderr] warning: enum is never used: `Result`
Dec 19 10:23:11.956 INFO [stderr]   --> src/main.rs:53:1
Dec 19 10:23:11.956 INFO [stderr]    |
Dec 19 10:23:11.956 INFO [stderr] 53 | enum Result<T, E> {
Dec 19 10:23:11.956 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 19 10:23:11.956 INFO [stderr] 
Dec 19 10:23:11.970 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.19s
Dec 19 10:23:12.213 INFO running `"docker" "inspect" "4f30273c06cf316b8caee001e24024605ac4d909714408c2dd9ee11e857b846f"`
Dec 19 10:23:12.282 INFO running `"docker" "rm" "-f" "4f30273c06cf316b8caee001e24024605ac4d909714408c2dd9ee11e857b846f"`
Dec 19 10:23:12.375 INFO [stdout] 4f30273c06cf316b8caee001e24024605ac4d909714408c2dd9ee11e857b846f