[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/beta-1.37-6/sources/1.36.0/gh/taskie/rust-memo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/taskie/rust-memo'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/taskie/rust-memo" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/taskie/rust-memo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of taskie/rust-memo on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "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/beta-1.37-6/sources/1.36.0/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/beta-1.37-6/sources/beta-2019-07-23/gh/taskie/rust-memo/Cargo.toml
[INFO] crate taskie/rust-memo already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing taskie/rust-memo against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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=warn" "-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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] de725ce90182a6e24726f8a4ff3b376768cf04a73af4db7a182ae9a3ab69901c
[INFO] running `"docker" "start" "-a" "de725ce90182a6e24726f8a4ff3b376768cf04a73af4db7a182ae9a3ab69901c"`
[INFO] [stderr]    Compiling 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 0.31s
[INFO] running `"docker" "inspect" "de725ce90182a6e24726f8a4ff3b376768cf04a73af4db7a182ae9a3ab69901c"`
[INFO] running `"docker" "rm" "-f" "de725ce90182a6e24726f8a4ff3b376768cf04a73af4db7a182ae9a3ab69901c"`
[INFO] [stdout] de725ce90182a6e24726f8a4ff3b376768cf04a73af4db7a182ae9a3ab69901c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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=warn" "-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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] e5efe5a63f1c7a6b822746238b46809f28359e3fa0671aaeacf82fee45103a5b
[INFO] running `"docker" "start" "-a" "e5efe5a63f1c7a6b822746238b46809f28359e3fa0671aaeacf82fee45103a5b"`
[INFO] [stderr]    Compiling memo v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `"docker" "inspect" "e5efe5a63f1c7a6b822746238b46809f28359e3fa0671aaeacf82fee45103a5b"`
[INFO] running `"docker" "rm" "-f" "e5efe5a63f1c7a6b822746238b46809f28359e3fa0671aaeacf82fee45103a5b"`
[INFO] [stdout] e5efe5a63f1c7a6b822746238b46809f28359e3fa0671aaeacf82fee45103a5b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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=warn" "-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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 672d2f10d64d7749b5076d4f325a3d4add7ef247809307862924b6099f4cd026
[INFO] running `"docker" "start" "-a" "672d2f10d64d7749b5076d4f325a3d4add7ef247809307862924b6099f4cd026"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/memo-61590360fe30297c
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test memo1::test_1 ... ok
[INFO] [stdout] test memo1::test_2 ... ok
[INFO] [stderr]    Doc-tests memo
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "672d2f10d64d7749b5076d4f325a3d4add7ef247809307862924b6099f4cd026"`
[INFO] running `"docker" "rm" "-f" "672d2f10d64d7749b5076d4f325a3d4add7ef247809307862924b6099f4cd026"`
[INFO] [stdout] 672d2f10d64d7749b5076d4f325a3d4add7ef247809307862924b6099f4cd026