[INFO] updating cached repository kbacha/string-clone-performance-rust [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/kbacha/string-clone-performance-rust [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/kbacha/string-clone-performance-rust" "work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/kbacha/string-clone-performance-rust"` [INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/kbacha/string-clone-performance-rust'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/kbacha/string-clone-performance-rust" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/kbacha/string-clone-performance-rust"` [INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/kbacha/string-clone-performance-rust'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] dbbcf257a78bae12cff841f781eac3a6ae9ccac3 [INFO] sha for GitHub repo kbacha/string-clone-performance-rust: dbbcf257a78bae12cff841f781eac3a6ae9ccac3 [INFO] validating manifest of kbacha/string-clone-performance-rust on toolchain master#c43d03a19f326f4a323569328cc501e86eb6d22e [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of kbacha/string-clone-performance-rust on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing kbacha/string-clone-performance-rust [INFO] finished frobbing kbacha/string-clone-performance-rust [INFO] frobbed toml for kbacha/string-clone-performance-rust written to work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/kbacha/string-clone-performance-rust/Cargo.toml [INFO] started frobbing kbacha/string-clone-performance-rust [INFO] finished frobbing kbacha/string-clone-performance-rust [INFO] frobbed toml for kbacha/string-clone-performance-rust written to work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/kbacha/string-clone-performance-rust/Cargo.toml [INFO] crate kbacha/string-clone-performance-rust already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] checking kbacha/string-clone-performance-rust against try#75eff020d0923c035c2fe220db4a0465cd847048 for pr-63565 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-2/try#75eff020d0923c035c2fe220db4a0465cd847048:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/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" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] eab01ce0e46a51e727e875d28e73c0b23162387668d7b8877319f36e9a61a2d7 [INFO] running `"docker" "start" "-a" "eab01ce0e46a51e727e875d28e73c0b23162387668d7b8877319f36e9a61a2d7"` [INFO] [stderr] Checking string-clone-performance v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used [INFO] [stderr] --> src/main.rs:13:38 [INFO] [stderr] | [INFO] [stderr] 13 | time("100 rs", 100_000_000, || { s.clone(); }); [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] = note: cloning is often expensive and is not expected to have side effects [INFO] [stderr] [INFO] [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used [INFO] [stderr] --> src/main.rs:15:39 [INFO] [stderr] | [INFO] [stderr] 15 | time("1000 rs", 100_000_000, || { s.clone(); }); [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: cloning is often expensive and is not expected to have side effects [INFO] [stderr] [INFO] [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used [INFO] [stderr] --> src/main.rs:17:41 [INFO] [stderr] | [INFO] [stderr] 17 | time("10,000 rs", 100_000_000, || { s.clone(); }); [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: cloning is often expensive and is not expected to have side effects [INFO] [stderr] [INFO] [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used [INFO] [stderr] --> src/main.rs:19:41 [INFO] [stderr] | [INFO] [stderr] 19 | time("100,000 rs", 10_000_000, || { s.clone(); }); [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: cloning is often expensive and is not expected to have side effects [INFO] [stderr] [INFO] [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used [INFO] [stderr] --> src/main.rs:13:38 [INFO] [stderr] | [INFO] [stderr] 13 | time("100 rs", 100_000_000, || { s.clone(); }); [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] = note: cloning is often expensive and is not expected to have side effects [INFO] [stderr] [INFO] [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used [INFO] [stderr] --> src/main.rs:15:39 [INFO] [stderr] | [INFO] [stderr] 15 | time("1000 rs", 100_000_000, || { s.clone(); }); [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: cloning is often expensive and is not expected to have side effects [INFO] [stderr] [INFO] [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used [INFO] [stderr] --> src/main.rs:17:41 [INFO] [stderr] | [INFO] [stderr] 17 | time("10,000 rs", 100_000_000, || { s.clone(); }); [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: cloning is often expensive and is not expected to have side effects [INFO] [stderr] [INFO] [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used [INFO] [stderr] --> src/main.rs:19:41 [INFO] [stderr] | [INFO] [stderr] 19 | time("100,000 rs", 10_000_000, || { s.clone(); }); [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: cloning is often expensive and is not expected to have side effects [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.71s [INFO] running `"docker" "inspect" "eab01ce0e46a51e727e875d28e73c0b23162387668d7b8877319f36e9a61a2d7"` [INFO] running `"docker" "rm" "-f" "eab01ce0e46a51e727e875d28e73c0b23162387668d7b8877319f36e9a61a2d7"` [INFO] [stdout] eab01ce0e46a51e727e875d28e73c0b23162387668d7b8877319f36e9a61a2d7