Dec 11 08:13:43.081 INFO checking taskie/rust-memo against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 08:13:43.081 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-6/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-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 11 08:13:43.488 INFO [stdout] 0793b57601004133275440160b57fea245e5ed70139c5fa264f70921eb65a926
Dec 11 08:13:43.494 INFO running `"docker" "start" "-a" "0793b57601004133275440160b57fea245e5ed70139c5fa264f70921eb65a926"`
Dec 11 08:13:45.240 INFO [stderr] usermod: no changes
Dec 11 08:13:45.300 INFO [stderr]     Checking memo v0.1.0 (/source)
Dec 11 08:13:45.552 INFO [stderr] warning: struct is never constructed: `S2_1`
Dec 11 08:13:45.552 INFO [stderr]  --> src/memo1.rs:5:1
Dec 11 08:13:45.552 INFO [stderr]   |
Dec 11 08:13:45.552 INFO [stderr] 5 | struct S2_1 { s1: Option<S1> }
Dec 11 08:13:45.552 INFO [stderr]   | ^^^^^^^^^^^
Dec 11 08:13:45.552 INFO [stderr]   |
Dec 11 08:13:45.552 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 11 08:13:45.552 INFO [stderr] 
Dec 11 08:13:45.552 INFO [stderr] warning: struct is never constructed: `S2_2`
Dec 11 08:13:45.552 INFO [stderr]  --> src/memo1.rs:8:1
Dec 11 08:13:45.552 INFO [stderr]   |
Dec 11 08:13:45.552 INFO [stderr] 8 | struct S2_2<'a> { s1: Option<&'a S1> }
Dec 11 08:13:45.552 INFO [stderr]   | ^^^^^^^^^^^^^^^
Dec 11 08:13:45.552 INFO [stderr] 
Dec 11 08:13:45.552 INFO [stderr] warning: method is never used: `f1`
Dec 11 08:13:45.552 INFO [stderr]   --> src/memo1.rs:16:5
Dec 11 08:13:45.552 INFO [stderr]    |
Dec 11 08:13:45.552 INFO [stderr] 16 |     fn f1(&self) -> S1 {
Dec 11 08:13:45.553 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^
Dec 11 08:13:45.553 INFO [stderr] 
Dec 11 08:13:45.553 INFO [stderr] warning: method is never used: `f1`
Dec 11 08:13:45.553 INFO [stderr]   --> src/memo1.rs:23:5
Dec 11 08:13:45.553 INFO [stderr]    |
Dec 11 08:13:45.553 INFO [stderr] 23 |     fn f1(&self) -> &S1 {
Dec 11 08:13:45.553 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 11 08:13:45.553 INFO [stderr] 
Dec 11 08:13:45.816 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
Dec 11 08:13:45.816 INFO [stderr] su: No module specific data is present
Dec 11 08:13:46.632 INFO running `"docker" "inspect" "0793b57601004133275440160b57fea245e5ed70139c5fa264f70921eb65a926"`
Dec 11 08:13:46.978 INFO running `"docker" "rm" "-f" "0793b57601004133275440160b57fea245e5ed70139c5fa264f70921eb65a926"`
Dec 11 08:13:47.340 INFO [stdout] 0793b57601004133275440160b57fea245e5ed70139c5fa264f70921eb65a926