Dec 15 07:21:35.860 INFO testing jec-rccow-0.1.0 against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 15 07:21:35.860 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-1/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-alt build --frozen" "-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 15 07:21:36.211 INFO [stdout] 766136b0187893dcf6083f383c5c31e9d8ccdadf8942c07975535ffcbe08f4ae
Dec 15 07:21:36.219 INFO running `"docker" "start" "-a" "766136b0187893dcf6083f383c5c31e9d8ccdadf8942c07975535ffcbe08f4ae"`
Dec 15 07:21:37.243 INFO [stderr] usermod: no changes
Dec 15 07:21:37.283 INFO [stderr]    Compiling jec-rccow v0.1.0 (/source)
Dec 15 07:21:37.909 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
Dec 15 07:21:37.911 INFO [stderr] su: No module specific data is present
Dec 15 07:21:38.491 INFO running `"docker" "inspect" "766136b0187893dcf6083f383c5c31e9d8ccdadf8942c07975535ffcbe08f4ae"`
Dec 15 07:21:38.764 INFO running `"docker" "rm" "-f" "766136b0187893dcf6083f383c5c31e9d8ccdadf8942c07975535ffcbe08f4ae"`
Dec 15 07:21:39.047 INFO [stdout] 766136b0187893dcf6083f383c5c31e9d8ccdadf8942c07975535ffcbe08f4ae
Dec 15 07:21:39.055 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-1/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen --no-run" "-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 15 07:21:39.522 INFO [stdout] 4dcec63f5f3687226e1945c74ba4d55e809309d99a86833c0b58bb7378bc5151
Dec 15 07:21:39.535 INFO running `"docker" "start" "-a" "4dcec63f5f3687226e1945c74ba4d55e809309d99a86833c0b58bb7378bc5151"`
Dec 15 07:21:40.567 INFO [stderr] usermod: no changes
Dec 15 07:21:40.639 INFO [stderr]    Compiling jec-rccow v0.1.0 (/source)
Dec 15 07:21:41.403 INFO [stderr] warning: variable does not need to be mutable
Dec 15 07:21:41.403 INFO [stderr]   --> src/lib.rs:73:13
Dec 15 07:21:41.403 INFO [stderr]    |
Dec 15 07:21:41.403 INFO [stderr] 73 |         let mut a = RcCow::new(5i32);
Dec 15 07:21:41.403 INFO [stderr]    |             ----^
Dec 15 07:21:41.403 INFO [stderr]    |             |
Dec 15 07:21:41.403 INFO [stderr]    |             help: remove this `mut`
Dec 15 07:21:41.403 INFO [stderr]    |
Dec 15 07:21:41.403 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 15 07:21:41.403 INFO [stderr] 
Dec 15 07:21:41.403 INFO [stderr] warning: variable does not need to be mutable
Dec 15 07:21:41.403 INFO [stderr]   --> src/lib.rs:77:13
Dec 15 07:21:41.403 INFO [stderr]    |
Dec 15 07:21:41.403 INFO [stderr] 77 |         let mut c = b.clone();
Dec 15 07:21:41.403 INFO [stderr]    |             ----^
Dec 15 07:21:41.403 INFO [stderr]    |             |
Dec 15 07:21:41.403 INFO [stderr]    |             help: remove this `mut`
Dec 15 07:21:41.403 INFO [stderr] 
Dec 15 07:21:41.892 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.27s
Dec 15 07:21:41.895 INFO [stderr] su: No module specific data is present
Dec 15 07:21:42.935 INFO running `"docker" "inspect" "4dcec63f5f3687226e1945c74ba4d55e809309d99a86833c0b58bb7378bc5151"`
Dec 15 07:21:43.318 INFO running `"docker" "rm" "-f" "4dcec63f5f3687226e1945c74ba4d55e809309d99a86833c0b58bb7378bc5151"`
Dec 15 07:21:43.595 INFO [stdout] 4dcec63f5f3687226e1945c74ba4d55e809309d99a86833c0b58bb7378bc5151