[INFO] cloning repository taskie/rust-memo
[INFO] running `"git" "clone" "--bare" "git://github.com/taskie/rust-memo.git" "work/cache/sources/gh/taskie/rust-memo"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/taskie/rust-memo'...
[INFO] running `"git" "clone" "work/cache/sources/gh/taskie/rust-memo" "work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/taskie/rust-memo"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/taskie/rust-memo'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/taskie/rust-memo" "work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/taskie/rust-memo"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/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#c0086b9e8972fef9fd4af24bae20d45021ed06c6
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of taskie/rust-memo on toolchain try#290ac7b29f41ff9fa5232f9a1116ea71a3501063
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-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-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/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-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/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" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking taskie/rust-memo against master#c0086b9e8972fef9fd4af24bae20d45021ed06c6 for pr-58899
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58899/worker-3/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/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" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] d01539735fa1322130e688ac56c99c851556d352bbba99f6f8b259727d35a59d
[INFO] running `"docker" "start" "-a" "d01539735fa1322130e688ac56c99c851556d352bbba99f6f8b259727d35a59d"`
[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 0.43s
[INFO] running `"docker" "inspect" "d01539735fa1322130e688ac56c99c851556d352bbba99f6f8b259727d35a59d"`
[INFO] running `"docker" "rm" "-f" "d01539735fa1322130e688ac56c99c851556d352bbba99f6f8b259727d35a59d"`
[INFO] [stdout] d01539735fa1322130e688ac56c99c851556d352bbba99f6f8b259727d35a59d