[INFO] updating cached repository taskie/rust-memo
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/taskie/rust-memo
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/taskie/rust-memo" "work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/taskie/rust-memo"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/taskie/rust-memo'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/taskie/rust-memo" "work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/taskie/rust-memo"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/taskie/rust-memo'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 389718524416253649e58ce9b1a285f3b405275d
[INFO] sha for GitHub repo taskie/rust-memo: 389718524416253649e58ce9b1a285f3b405275d
[INFO] validating manifest of taskie/rust-memo on toolchain master#f66e4697ae286985ddefc53c3a047614568458bb
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of taskie/rust-memo on toolchain try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing taskie/rust-memo
[INFO] finished frobbing taskie/rust-memo
[INFO] frobbed toml for taskie/rust-memo written to work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/taskie/rust-memo/Cargo.toml
[INFO] started frobbing taskie/rust-memo
[INFO] finished frobbing taskie/rust-memo
[INFO] frobbed toml for taskie/rust-memo written to work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/taskie/rust-memo/Cargo.toml
[INFO] crate taskie/rust-memo has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking taskie/rust-memo against try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a for pr-58592
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58592/worker-5/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/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" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2696b4af81e84629cf4b1b5515c0a5b019bb95422f797f2e22f5f4d3ac8624ac
[INFO] running `"docker" "start" "-a" "2696b4af81e84629cf4b1b5515c0a5b019bb95422f797f2e22f5f4d3ac8624ac"`
[INFO] [stderr]     Checking memo v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `S2_1`
[INFO] [stderr]  --> src/memo1.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | struct S2_1 { s1: Option<S1> }
[INFO] [stderr]   | ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `S2_2`
[INFO] [stderr]  --> src/memo1.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | struct S2_2<'a> { s1: Option<&'a S1> }
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `f1`
[INFO] [stderr]   --> src/memo1.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn f1(&self) -> S1 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `f1`
[INFO] [stderr]   --> src/memo1.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn f1(&self) -> &S1 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `"docker" "inspect" "2696b4af81e84629cf4b1b5515c0a5b019bb95422f797f2e22f5f4d3ac8624ac"`
[INFO] running `"docker" "rm" "-f" "2696b4af81e84629cf4b1b5515c0a5b019bb95422f797f2e22f5f4d3ac8624ac"`
[INFO] [stdout] 2696b4af81e84629cf4b1b5515c0a5b019bb95422f797f2e22f5f4d3ac8624ac