Dec 12 15:31:10.381 INFO checking elementtree-0.5.0 against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 12 15:31:10.381 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-7/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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 12 15:31:10.789 INFO [stdout] ac757f848d1f6f3b8b81ee5938a04c5e6d89fd0af64e6cdfff7a6455de39abc3
Dec 12 15:31:10.794 INFO running `"docker" "start" "-a" "ac757f848d1f6f3b8b81ee5938a04c5e6d89fd0af64e6cdfff7a6455de39abc3"`
Dec 12 15:31:11.606 INFO [stderr] usermod: no changes
Dec 12 15:31:11.687 INFO [stderr]     Checking string_cache v0.7.3
Dec 12 15:31:12.621 INFO [stderr]     Checking elementtree v0.5.0 (/source)
Dec 12 15:31:16.520 INFO [stderr] warning: variable does not need to be mutable
Dec 12 15:31:16.520 INFO [stderr]    --> tests/test_basic.rs:138:13
Dec 12 15:31:16.520 INFO [stderr]     |
Dec 12 15:31:16.520 INFO [stderr] 138 |         let mut list = root.append_new_child("{demo}list");
Dec 12 15:31:16.520 INFO [stderr]     |             ----^^^^
Dec 12 15:31:16.520 INFO [stderr]     |             |
Dec 12 15:31:16.520 INFO [stderr]     |             help: remove this `mut`
Dec 12 15:31:16.520 INFO [stderr]     |
Dec 12 15:31:16.520 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 12 15:31:16.520 INFO [stderr] 
Dec 12 15:31:16.526 INFO [stderr] warning: variable does not need to be mutable
Dec 12 15:31:16.526 INFO [stderr]    --> tests/test_basic.rs:183:13
Dec 12 15:31:16.526 INFO [stderr]     |
Dec 12 15:31:16.526 INFO [stderr] 183 |         let mut list = root.append_new_child("{demo}list");
Dec 12 15:31:16.526 INFO [stderr]     |             ----^^^^
Dec 12 15:31:16.526 INFO [stderr]     |             |
Dec 12 15:31:16.526 INFO [stderr]     |             help: remove this `mut`
Dec 12 15:31:16.526 INFO [stderr] 
Dec 12 15:31:16.528 INFO [stderr] warning: variable does not need to be mutable
Dec 12 15:31:16.528 INFO [stderr]    --> tests/test_basic.rs:210:13
Dec 12 15:31:16.528 INFO [stderr]     |
Dec 12 15:31:16.528 INFO [stderr] 210 |         let mut list = root.append_new_child("{demo}list");
Dec 12 15:31:16.528 INFO [stderr]     |             ----^^^^
Dec 12 15:31:16.528 INFO [stderr]     |             |
Dec 12 15:31:16.528 INFO [stderr]     |             help: remove this `mut`
Dec 12 15:31:16.528 INFO [stderr] 
Dec 12 15:31:16.531 INFO [stderr] warning: variable does not need to be mutable
Dec 12 15:31:16.531 INFO [stderr]    --> tests/test_basic.rs:238:13
Dec 12 15:31:16.531 INFO [stderr]     |
Dec 12 15:31:16.531 INFO [stderr] 238 |         let mut list = root.append_new_child("{demo}list");
Dec 12 15:31:16.531 INFO [stderr]     |             ----^^^^
Dec 12 15:31:16.531 INFO [stderr]     |             |
Dec 12 15:31:16.531 INFO [stderr]     |             help: remove this `mut`
Dec 12 15:31:16.531 INFO [stderr] 
Dec 12 15:31:16.540 INFO [stderr] warning: variable does not need to be mutable
Dec 12 15:31:16.540 INFO [stderr]    --> tests/test_basic.rs:266:13
Dec 12 15:31:16.540 INFO [stderr]     |
Dec 12 15:31:16.540 INFO [stderr] 266 |         let mut list = root.append_new_child("{demo}list");
Dec 12 15:31:16.540 INFO [stderr]     |             ----^^^^
Dec 12 15:31:16.540 INFO [stderr]     |             |
Dec 12 15:31:16.540 INFO [stderr]     |             help: remove this `mut`
Dec 12 15:31:16.540 INFO [stderr] 
Dec 12 15:31:16.551 INFO [stderr] warning: variable does not need to be mutable
Dec 12 15:31:16.551 INFO [stderr]    --> tests/test_basic.rs:323:13
Dec 12 15:31:16.551 INFO [stderr]     |
Dec 12 15:31:16.551 INFO [stderr] 323 |         let mut list = root.find_mut("list").unwrap();
Dec 12 15:31:16.551 INFO [stderr]     |             ----^^^^
Dec 12 15:31:16.551 INFO [stderr]     |             |
Dec 12 15:31:16.551 INFO [stderr]     |             help: remove this `mut`
Dec 12 15:31:16.551 INFO [stderr] 
Dec 12 15:31:17.012 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.39s
Dec 12 15:31:17.021 INFO [stderr] su: No module specific data is present
Dec 12 15:31:17.930 INFO running `"docker" "inspect" "ac757f848d1f6f3b8b81ee5938a04c5e6d89fd0af64e6cdfff7a6455de39abc3"`
Dec 12 15:31:18.164 INFO running `"docker" "rm" "-f" "ac757f848d1f6f3b8b81ee5938a04c5e6d89fd0af64e6cdfff7a6455de39abc3"`
Dec 12 15:31:18.514 INFO [stdout] ac757f848d1f6f3b8b81ee5938a04c5e6d89fd0af64e6cdfff7a6455de39abc3