Dec 17 21:40:21.069 INFO checking kbacha/string-clone-performance-rust against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 21:40:21.069 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-7/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 21:40:21.694 INFO [stdout] 02f60e976ef7d88a7baf737c78c6fb30e7e576c52bb8c6ae5d0a7a240653ecb0
Dec 17 21:40:21.696 INFO running `"docker" "start" "-a" "02f60e976ef7d88a7baf737c78c6fb30e7e576c52bb8c6ae5d0a7a240653ecb0"`
Dec 17 21:40:24.216 INFO [stderr]     Checking string-clone-performance v0.1.0 (/opt/crater/workdir)
Dec 17 21:40:24.698 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 17 21:40:24.698 INFO [stderr]   --> src/main.rs:13:38
Dec 17 21:40:24.698 INFO [stderr]    |
Dec 17 21:40:24.699 INFO [stderr] 13 |     time("100 rs", 100_000_000, || { s.clone(); });
Dec 17 21:40:24.699 INFO [stderr]    |                                      ^^^^^^^^^^
Dec 17 21:40:24.712 INFO [stderr]    |
Dec 17 21:40:24.713 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 21:40:24.713 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 17 21:40:24.713 INFO [stderr] 
Dec 17 21:40:24.713 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 17 21:40:24.714 INFO [stderr]   --> src/main.rs:15:39
Dec 17 21:40:24.714 INFO [stderr]    |
Dec 17 21:40:24.714 INFO [stderr] 15 |     time("1000 rs", 100_000_000, || { s.clone(); });
Dec 17 21:40:24.714 INFO [stderr]    |                                       ^^^^^^^^^^
Dec 17 21:40:24.715 INFO [stderr]    |
Dec 17 21:40:24.715 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 17 21:40:24.715 INFO [stderr] 
Dec 17 21:40:24.715 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 17 21:40:24.716 INFO [stderr]   --> src/main.rs:17:41
Dec 17 21:40:24.716 INFO [stderr]    |
Dec 17 21:40:24.716 INFO [stderr] 17 |     time("10,000 rs", 100_000_000, || { s.clone(); });
Dec 17 21:40:24.716 INFO [stderr]    |                                         ^^^^^^^^^^
Dec 17 21:40:24.717 INFO [stderr]    |
Dec 17 21:40:24.717 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 17 21:40:24.717 INFO [stderr] 
Dec 17 21:40:24.717 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 17 21:40:24.717 INFO [stderr]   --> src/main.rs:19:41
Dec 17 21:40:24.718 INFO [stderr]    |
Dec 17 21:40:24.718 INFO [stderr] 19 |     time("100,000 rs", 10_000_000, || { s.clone(); });
Dec 17 21:40:24.718 INFO [stderr]    |                                         ^^^^^^^^^^
Dec 17 21:40:24.718 INFO [stderr]    |
Dec 17 21:40:24.718 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 17 21:40:24.718 INFO [stderr] 
Dec 17 21:40:24.727 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 17 21:40:24.727 INFO [stderr]   --> src/main.rs:13:38
Dec 17 21:40:24.727 INFO [stderr]    |
Dec 17 21:40:24.728 INFO [stderr] 13 |     time("100 rs", 100_000_000, || { s.clone(); });
Dec 17 21:40:24.728 INFO [stderr]    |                                      ^^^^^^^^^^
Dec 17 21:40:24.728 INFO [stderr]    |
Dec 17 21:40:24.728 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 21:40:24.728 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 17 21:40:24.728 INFO [stderr] 
Dec 17 21:40:24.728 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 17 21:40:24.728 INFO [stderr]   --> src/main.rs:15:39
Dec 17 21:40:24.729 INFO [stderr]    |
Dec 17 21:40:24.729 INFO [stderr] 15 |     time("1000 rs", 100_000_000, || { s.clone(); });
Dec 17 21:40:24.729 INFO [stderr]    |                                       ^^^^^^^^^^
Dec 17 21:40:24.729 INFO [stderr]    |
Dec 17 21:40:24.729 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 17 21:40:24.729 INFO [stderr] 
Dec 17 21:40:24.729 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 17 21:40:24.729 INFO [stderr]   --> src/main.rs:17:41
Dec 17 21:40:24.729 INFO [stderr]    |
Dec 17 21:40:24.730 INFO [stderr] 17 |     time("10,000 rs", 100_000_000, || { s.clone(); });
Dec 17 21:40:24.730 INFO [stderr]    |                                         ^^^^^^^^^^
Dec 17 21:40:24.730 INFO [stderr]    |
Dec 17 21:40:24.730 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 17 21:40:24.730 INFO [stderr] 
Dec 17 21:40:24.730 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 17 21:40:24.730 INFO [stderr]   --> src/main.rs:19:41
Dec 17 21:40:24.730 INFO [stderr]    |
Dec 17 21:40:24.731 INFO [stderr] 19 |     time("100,000 rs", 10_000_000, || { s.clone(); });
Dec 17 21:40:24.731 INFO [stderr]    |                                         ^^^^^^^^^^
Dec 17 21:40:24.731 INFO [stderr]    |
Dec 17 21:40:24.731 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 17 21:40:24.731 INFO [stderr] 
Dec 17 21:40:24.780 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.59s
Dec 17 21:40:25.936 INFO running `"docker" "inspect" "02f60e976ef7d88a7baf737c78c6fb30e7e576c52bb8c6ae5d0a7a240653ecb0"`
Dec 17 21:40:26.286 INFO running `"docker" "rm" "-f" "02f60e976ef7d88a7baf737c78c6fb30e7e576c52bb8c6ae5d0a7a240653ecb0"`
Dec 17 21:40:26.688 INFO [stdout] 02f60e976ef7d88a7baf737c78c6fb30e7e576c52bb8c6ae5d0a7a240653ecb0