Dec 11 15:43:27.209 INFO checking kbacha/string-clone-performance-rust against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 15:43:27.209 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-1/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +3a75e80557a103497cffbcab395a2f37061a77ea-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 11 15:43:27.606 INFO [stdout] 1c65f1d9d2af3c216de89d98fbdb2540ccbff7a96641b7c3b4ed78d0e1517328
Dec 11 15:43:27.608 INFO running `"docker" "start" "-a" "1c65f1d9d2af3c216de89d98fbdb2540ccbff7a96641b7c3b4ed78d0e1517328"`
Dec 11 15:43:29.344 INFO [stderr] usermod: no changes
Dec 11 15:43:29.400 INFO [stderr]     Checking string-clone-performance v0.1.0 (/source)
Dec 11 15:43:29.760 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 11 15:43:29.760 INFO [stderr]   --> src/main.rs:13:38
Dec 11 15:43:29.760 INFO [stderr]    |
Dec 11 15:43:29.760 INFO [stderr] 13 |     time("100 rs", 100_000_000, || { s.clone(); });
Dec 11 15:43:29.760 INFO [stderr]    |                                      ^^^^^^^^^^
Dec 11 15:43:29.760 INFO [stderr]    |
Dec 11 15:43:29.760 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 15:43:29.760 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 11 15:43:29.760 INFO [stderr] 
Dec 11 15:43:29.760 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 11 15:43:29.760 INFO [stderr]   --> src/main.rs:15:39
Dec 11 15:43:29.760 INFO [stderr]    |
Dec 11 15:43:29.760 INFO [stderr] 15 |     time("1000 rs", 100_000_000, || { s.clone(); });
Dec 11 15:43:29.760 INFO [stderr]    |                                       ^^^^^^^^^^
Dec 11 15:43:29.760 INFO [stderr]    |
Dec 11 15:43:29.760 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 11 15:43:29.760 INFO [stderr] 
Dec 11 15:43:29.760 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 11 15:43:29.761 INFO [stderr]   --> src/main.rs:17:41
Dec 11 15:43:29.761 INFO [stderr]    |
Dec 11 15:43:29.761 INFO [stderr] 17 |     time("10,000 rs", 100_000_000, || { s.clone(); });
Dec 11 15:43:29.761 INFO [stderr]    |                                         ^^^^^^^^^^
Dec 11 15:43:29.761 INFO [stderr]    |
Dec 11 15:43:29.761 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 11 15:43:29.761 INFO [stderr] 
Dec 11 15:43:29.762 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 11 15:43:29.762 INFO [stderr]   --> src/main.rs:19:41
Dec 11 15:43:29.762 INFO [stderr]    |
Dec 11 15:43:29.762 INFO [stderr] 19 |     time("100,000 rs", 10_000_000, || { s.clone(); });
Dec 11 15:43:29.762 INFO [stderr]    |                                         ^^^^^^^^^^
Dec 11 15:43:29.762 INFO [stderr]    |
Dec 11 15:43:29.762 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 11 15:43:29.762 INFO [stderr] 
Dec 11 15:43:29.906 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 11 15:43:29.906 INFO [stderr]   --> src/main.rs:13:38
Dec 11 15:43:29.906 INFO [stderr]    |
Dec 11 15:43:29.906 INFO [stderr] 13 |     time("100 rs", 100_000_000, || { s.clone(); });
Dec 11 15:43:29.906 INFO [stderr]    |                                      ^^^^^^^^^^
Dec 11 15:43:29.906 INFO [stderr]    |
Dec 11 15:43:29.906 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 15:43:29.906 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 11 15:43:29.906 INFO [stderr] 
Dec 11 15:43:29.906 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 11 15:43:29.906 INFO [stderr]   --> src/main.rs:15:39
Dec 11 15:43:29.906 INFO [stderr]    |
Dec 11 15:43:29.906 INFO [stderr] 15 |     time("1000 rs", 100_000_000, || { s.clone(); });
Dec 11 15:43:29.906 INFO [stderr]    |                                       ^^^^^^^^^^
Dec 11 15:43:29.906 INFO [stderr]    |
Dec 11 15:43:29.906 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 11 15:43:29.906 INFO [stderr] 
Dec 11 15:43:29.906 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 11 15:43:29.906 INFO [stderr]   --> src/main.rs:17:41
Dec 11 15:43:29.906 INFO [stderr]    |
Dec 11 15:43:29.906 INFO [stderr] 17 |     time("10,000 rs", 100_000_000, || { s.clone(); });
Dec 11 15:43:29.906 INFO [stderr]    |                                         ^^^^^^^^^^
Dec 11 15:43:29.906 INFO [stderr]    |
Dec 11 15:43:29.906 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 11 15:43:29.906 INFO [stderr] 
Dec 11 15:43:29.906 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 11 15:43:29.906 INFO [stderr]   --> src/main.rs:19:41
Dec 11 15:43:29.906 INFO [stderr]    |
Dec 11 15:43:29.906 INFO [stderr] 19 |     time("100,000 rs", 10_000_000, || { s.clone(); });
Dec 11 15:43:29.906 INFO [stderr]    |                                         ^^^^^^^^^^
Dec 11 15:43:29.906 INFO [stderr]    |
Dec 11 15:43:29.906 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 11 15:43:29.906 INFO [stderr] 
Dec 11 15:43:29.937 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.57s
Dec 11 15:43:29.939 INFO [stderr] su: No module specific data is present
Dec 11 15:43:30.304 INFO running `"docker" "inspect" "1c65f1d9d2af3c216de89d98fbdb2540ccbff7a96641b7c3b4ed78d0e1517328"`
Dec 11 15:43:30.406 INFO running `"docker" "rm" "-f" "1c65f1d9d2af3c216de89d98fbdb2540ccbff7a96641b7c3b4ed78d0e1517328"`
Dec 11 15:43:30.608 INFO [stdout] 1c65f1d9d2af3c216de89d98fbdb2540ccbff7a96641b7c3b4ed78d0e1517328