Dec 17 21:40:25.565 INFO checking kbacha/string-clone-performance-rust against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 21:40:25.565 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/kbacha/string-clone-performance-rust:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 21:40:26.083 INFO [stdout] 8f865c57a89184eb50611b400d89a42ff534b6cdcaf618762006ad7ff96d82f3
Dec 17 21:40:26.092 INFO running `"docker" "start" "-a" "8f865c57a89184eb50611b400d89a42ff534b6cdcaf618762006ad7ff96d82f3"`
Dec 17 21:40:27.852 INFO [stderr]     Checking string-clone-performance v0.1.0 (/opt/crater/workdir)
Dec 17 21:40:28.209 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 17 21:40:28.209 INFO [stderr]   --> src/main.rs:13:38
Dec 17 21:40:28.209 INFO [stderr]    |
Dec 17 21:40:28.209 INFO [stderr] 13 |     time("100 rs", 100_000_000, || { s.clone(); });
Dec 17 21:40:28.209 INFO [stderr]    |                                      ^^^^^^^^^^
Dec 17 21:40:28.209 INFO [stderr]    |
Dec 17 21:40:28.209 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 21:40:28.209 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 17 21:40:28.209 INFO [stderr] 
Dec 17 21:40:28.209 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 17 21:40:28.209 INFO [stderr]   --> src/main.rs:15:39
Dec 17 21:40:28.209 INFO [stderr]    |
Dec 17 21:40:28.209 INFO [stderr] 15 |     time("1000 rs", 100_000_000, || { s.clone(); });
Dec 17 21:40:28.209 INFO [stderr]    |                                       ^^^^^^^^^^
Dec 17 21:40:28.209 INFO [stderr]    |
Dec 17 21:40:28.216 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 17 21:40:28.216 INFO [stderr] 
Dec 17 21:40:28.216 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 17 21:40:28.216 INFO [stderr]   --> src/main.rs:17:41
Dec 17 21:40:28.216 INFO [stderr]    |
Dec 17 21:40:28.216 INFO [stderr] 17 |     time("10,000 rs", 100_000_000, || { s.clone(); });
Dec 17 21:40:28.216 INFO [stderr]    |                                         ^^^^^^^^^^
Dec 17 21:40:28.216 INFO [stderr]    |
Dec 17 21:40:28.216 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 17 21:40:28.216 INFO [stderr] 
Dec 17 21:40:28.216 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 17 21:40:28.216 INFO [stderr]   --> src/main.rs:19:41
Dec 17 21:40:28.216 INFO [stderr]    |
Dec 17 21:40:28.216 INFO [stderr] 19 |     time("100,000 rs", 10_000_000, || { s.clone(); });
Dec 17 21:40:28.216 INFO [stderr]    |                                         ^^^^^^^^^^
Dec 17 21:40:28.216 INFO [stderr]    |
Dec 17 21:40:28.216 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 17 21:40:28.216 INFO [stderr] 
Dec 17 21:40:28.263 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 17 21:40:28.263 INFO [stderr]   --> src/main.rs:13:38
Dec 17 21:40:28.263 INFO [stderr]    |
Dec 17 21:40:28.263 INFO [stderr] 13 |     time("100 rs", 100_000_000, || { s.clone(); });
Dec 17 21:40:28.263 INFO [stderr]    |                                      ^^^^^^^^^^
Dec 17 21:40:28.263 INFO [stderr]    |
Dec 17 21:40:28.263 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 21:40:28.263 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 17 21:40:28.263 INFO [stderr] 
Dec 17 21:40:28.263 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 17 21:40:28.263 INFO [stderr]   --> src/main.rs:15:39
Dec 17 21:40:28.263 INFO [stderr]    |
Dec 17 21:40:28.263 INFO [stderr] 15 |     time("1000 rs", 100_000_000, || { s.clone(); });
Dec 17 21:40:28.263 INFO [stderr]    |                                       ^^^^^^^^^^
Dec 17 21:40:28.263 INFO [stderr]    |
Dec 17 21:40:28.263 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 17 21:40:28.263 INFO [stderr] 
Dec 17 21:40:28.263 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 17 21:40:28.263 INFO [stderr]   --> src/main.rs:17:41
Dec 17 21:40:28.263 INFO [stderr]    |
Dec 17 21:40:28.263 INFO [stderr] 17 |     time("10,000 rs", 100_000_000, || { s.clone(); });
Dec 17 21:40:28.263 INFO [stderr]    |                                         ^^^^^^^^^^
Dec 17 21:40:28.263 INFO [stderr]    |
Dec 17 21:40:28.263 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 17 21:40:28.263 INFO [stderr] 
Dec 17 21:40:28.263 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 17 21:40:28.263 INFO [stderr]   --> src/main.rs:19:41
Dec 17 21:40:28.263 INFO [stderr]    |
Dec 17 21:40:28.263 INFO [stderr] 19 |     time("100,000 rs", 10_000_000, || { s.clone(); });
Dec 17 21:40:28.263 INFO [stderr]    |                                         ^^^^^^^^^^
Dec 17 21:40:28.263 INFO [stderr]    |
Dec 17 21:40:28.263 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 17 21:40:28.263 INFO [stderr] 
Dec 17 21:40:28.297 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
Dec 17 21:40:29.292 INFO running `"docker" "inspect" "8f865c57a89184eb50611b400d89a42ff534b6cdcaf618762006ad7ff96d82f3"`
Dec 17 21:40:29.586 INFO running `"docker" "rm" "-f" "8f865c57a89184eb50611b400d89a42ff534b6cdcaf618762006ad7ff96d82f3"`
Dec 17 21:40:29.896 INFO [stdout] 8f865c57a89184eb50611b400d89a42ff534b6cdcaf618762006ad7ff96d82f3