Dec 15 07:21:32.234 INFO testing jec-rccow-0.1.0 against try#aa49d8ef14939ddec0e34b346b60174a5673d48f for pr-56550
Dec 15 07:21:32.234 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-2/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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 07:21:32.631 INFO [stdout] cb07a03ad8b7919659ec2634cfedab15d4fadd96dc46e69262f9cc18e7963059
Dec 15 07:21:32.637 INFO running `"docker" "start" "-a" "cb07a03ad8b7919659ec2634cfedab15d4fadd96dc46e69262f9cc18e7963059"`
Dec 15 07:21:33.908 INFO [stderr] usermod: no changes
Dec 15 07:21:33.944 INFO [stderr]    Compiling jec-rccow v0.1.0 (/source)
Dec 15 07:21:34.578 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
Dec 15 07:21:34.583 INFO [stderr] su: No module specific data is present
Dec 15 07:21:35.106 INFO running `"docker" "inspect" "cb07a03ad8b7919659ec2634cfedab15d4fadd96dc46e69262f9cc18e7963059"`
Dec 15 07:21:35.391 INFO running `"docker" "rm" "-f" "cb07a03ad8b7919659ec2634cfedab15d4fadd96dc46e69262f9cc18e7963059"`
Dec 15 07:21:35.658 INFO [stdout] cb07a03ad8b7919659ec2634cfedab15d4fadd96dc46e69262f9cc18e7963059
Dec 15 07:21:35.661 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-2/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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 07:21:36.071 INFO [stdout] 79b16b0696f10fe9ec0c9aed0d83658eda0dfcdb549db88544c851370cfcac5c
Dec 15 07:21:36.080 INFO running `"docker" "start" "-a" "79b16b0696f10fe9ec0c9aed0d83658eda0dfcdb549db88544c851370cfcac5c"`
Dec 15 07:21:37.062 INFO [stderr] usermod: no changes
Dec 15 07:21:37.118 INFO [stderr]    Compiling jec-rccow v0.1.0 (/source)
Dec 15 07:21:37.824 INFO [stderr] warning: variable does not need to be mutable
Dec 15 07:21:37.824 INFO [stderr]   --> src/lib.rs:73:13
Dec 15 07:21:37.824 INFO [stderr]    |
Dec 15 07:21:37.824 INFO [stderr] 73 |         let mut a = RcCow::new(5i32);
Dec 15 07:21:37.824 INFO [stderr]    |             ----^
Dec 15 07:21:37.824 INFO [stderr]    |             |
Dec 15 07:21:37.824 INFO [stderr]    |             help: remove this `mut`
Dec 15 07:21:37.824 INFO [stderr]    |
Dec 15 07:21:37.824 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 15 07:21:37.824 INFO [stderr] 
Dec 15 07:21:37.824 INFO [stderr] warning: variable does not need to be mutable
Dec 15 07:21:37.824 INFO [stderr]   --> src/lib.rs:77:13
Dec 15 07:21:37.824 INFO [stderr]    |
Dec 15 07:21:37.824 INFO [stderr] 77 |         let mut c = b.clone();
Dec 15 07:21:37.824 INFO [stderr]    |             ----^
Dec 15 07:21:37.824 INFO [stderr]    |             |
Dec 15 07:21:37.824 INFO [stderr]    |             help: remove this `mut`
Dec 15 07:21:37.824 INFO [stderr] 
Dec 15 07:21:38.307 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.22s
Dec 15 07:21:38.307 INFO [stderr] su: No module specific data is present
Dec 15 07:21:38.800 INFO running `"docker" "inspect" "79b16b0696f10fe9ec0c9aed0d83658eda0dfcdb549db88544c851370cfcac5c"`
Dec 15 07:21:39.144 INFO running `"docker" "rm" "-f" "79b16b0696f10fe9ec0c9aed0d83658eda0dfcdb549db88544c851370cfcac5c"`
Dec 15 07:21:39.431 INFO [stdout] 79b16b0696f10fe9ec0c9aed0d83658eda0dfcdb549db88544c851370cfcac5c