Dec 19 07:34:36.348 INFO checking taskie/rust-memo against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 07:34:36.348 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/taskie/rust-memo:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 07:34:36.845 INFO [stdout] d4ce53250b88c0e16049053295086fd99faa05816d19cb535d9d1f878f00e3f2
Dec 19 07:34:36.847 INFO running `"docker" "start" "-a" "d4ce53250b88c0e16049053295086fd99faa05816d19cb535d9d1f878f00e3f2"`
Dec 19 07:34:38.972 INFO [stderr]     Checking memo v0.1.0 (/opt/crater/workdir)
Dec 19 07:34:39.336 INFO [stderr] warning: struct is never constructed: `S2_1`
Dec 19 07:34:39.336 INFO [stderr]  --> src/memo1.rs:5:1
Dec 19 07:34:39.337 INFO [stderr]   |
Dec 19 07:34:39.337 INFO [stderr] 5 | struct S2_1 { s1: Option<S1> }
Dec 19 07:34:39.337 INFO [stderr]   | ^^^^^^^^^^^
Dec 19 07:34:39.337 INFO [stderr]   |
Dec 19 07:34:39.337 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 07:34:39.338 INFO [stderr] 
Dec 19 07:34:39.338 INFO [stderr] warning: struct is never constructed: `S2_2`
Dec 19 07:34:39.338 INFO [stderr]  --> src/memo1.rs:8:1
Dec 19 07:34:39.338 INFO [stderr]   |
Dec 19 07:34:39.338 INFO [stderr] 8 | struct S2_2<'a> { s1: Option<&'a S1> }
Dec 19 07:34:39.338 INFO [stderr]   | ^^^^^^^^^^^^^^^
Dec 19 07:34:39.339 INFO [stderr] 
Dec 19 07:34:39.339 INFO [stderr] warning: method is never used: `f1`
Dec 19 07:34:39.339 INFO [stderr]   --> src/memo1.rs:16:5
Dec 19 07:34:39.339 INFO [stderr]    |
Dec 19 07:34:39.339 INFO [stderr] 16 |     fn f1(&self) -> S1 {
Dec 19 07:34:39.340 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^
Dec 19 07:34:39.340 INFO [stderr] 
Dec 19 07:34:39.340 INFO [stderr] warning: method is never used: `f1`
Dec 19 07:34:39.340 INFO [stderr]   --> src/memo1.rs:23:5
Dec 19 07:34:39.340 INFO [stderr]    |
Dec 19 07:34:39.340 INFO [stderr] 23 |     fn f1(&self) -> &S1 {
Dec 19 07:34:39.341 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 19 07:34:39.341 INFO [stderr] 
Dec 19 07:34:39.371 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.42s
Dec 19 07:34:41.154 INFO running `"docker" "inspect" "d4ce53250b88c0e16049053295086fd99faa05816d19cb535d9d1f878f00e3f2"`
Dec 19 07:34:41.584 INFO running `"docker" "rm" "-f" "d4ce53250b88c0e16049053295086fd99faa05816d19cb535d9d1f878f00e3f2"`
Dec 19 07:34:41.964 INFO [stdout] d4ce53250b88c0e16049053295086fd99faa05816d19cb535d9d1f878f00e3f2