Dec 18 16:49:17.329 INFO checking elementtree-0.5.0 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 16:49:17.329 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/elementtree/0.5.0:/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 16:49:17.794 INFO [stdout] 413f519ffc7b4fe96df3caee6e619501a69189ffcacb70711539f83887ad9c9d
Dec 18 16:49:17.800 INFO running `"docker" "start" "-a" "413f519ffc7b4fe96df3caee6e619501a69189ffcacb70711539f83887ad9c9d"`
Dec 18 16:49:19.152 INFO [stderr]     Checking elementtree v0.5.0 (/opt/crater/workdir)
Dec 18 16:49:20.532 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:49:20.532 INFO [stderr]    --> tests/test_basic.rs:138:13
Dec 18 16:49:20.532 INFO [stderr]     |
Dec 18 16:49:20.532 INFO [stderr] 138 |         let mut list = root.append_new_child("{demo}list");
Dec 18 16:49:20.532 INFO [stderr]     |             ----^^^^
Dec 18 16:49:20.532 INFO [stderr]     |             |
Dec 18 16:49:20.532 INFO [stderr]     |             help: remove this `mut`
Dec 18 16:49:20.532 INFO [stderr]     |
Dec 18 16:49:20.532 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 16:49:20.532 INFO [stderr] 
Dec 18 16:49:20.540 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:49:20.540 INFO [stderr]    --> tests/test_basic.rs:183:13
Dec 18 16:49:20.540 INFO [stderr]     |
Dec 18 16:49:20.540 INFO [stderr] 183 |         let mut list = root.append_new_child("{demo}list");
Dec 18 16:49:20.540 INFO [stderr]     |             ----^^^^
Dec 18 16:49:20.540 INFO [stderr]     |             |
Dec 18 16:49:20.540 INFO [stderr]     |             help: remove this `mut`
Dec 18 16:49:20.540 INFO [stderr] 
Dec 18 16:49:20.540 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:49:20.540 INFO [stderr]    --> tests/test_basic.rs:210:13
Dec 18 16:49:20.540 INFO [stderr]     |
Dec 18 16:49:20.540 INFO [stderr] 210 |         let mut list = root.append_new_child("{demo}list");
Dec 18 16:49:20.540 INFO [stderr]     |             ----^^^^
Dec 18 16:49:20.540 INFO [stderr]     |             |
Dec 18 16:49:20.540 INFO [stderr]     |             help: remove this `mut`
Dec 18 16:49:20.540 INFO [stderr] 
Dec 18 16:49:20.541 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:49:20.541 INFO [stderr]    --> tests/test_basic.rs:238:13
Dec 18 16:49:20.541 INFO [stderr]     |
Dec 18 16:49:20.541 INFO [stderr] 238 |         let mut list = root.append_new_child("{demo}list");
Dec 18 16:49:20.541 INFO [stderr]     |             ----^^^^
Dec 18 16:49:20.541 INFO [stderr]     |             |
Dec 18 16:49:20.541 INFO [stderr]     |             help: remove this `mut`
Dec 18 16:49:20.542 INFO [stderr] 
Dec 18 16:49:20.544 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:49:20.544 INFO [stderr]    --> tests/test_basic.rs:266:13
Dec 18 16:49:20.544 INFO [stderr]     |
Dec 18 16:49:20.544 INFO [stderr] 266 |         let mut list = root.append_new_child("{demo}list");
Dec 18 16:49:20.544 INFO [stderr]     |             ----^^^^
Dec 18 16:49:20.544 INFO [stderr]     |             |
Dec 18 16:49:20.544 INFO [stderr]     |             help: remove this `mut`
Dec 18 16:49:20.544 INFO [stderr] 
Dec 18 16:49:20.551 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:49:20.551 INFO [stderr]    --> tests/test_basic.rs:323:13
Dec 18 16:49:20.551 INFO [stderr]     |
Dec 18 16:49:20.551 INFO [stderr] 323 |         let mut list = root.find_mut("list").unwrap();
Dec 18 16:49:20.551 INFO [stderr]     |             ----^^^^
Dec 18 16:49:20.551 INFO [stderr]     |             |
Dec 18 16:49:20.551 INFO [stderr]     |             help: remove this `mut`
Dec 18 16:49:20.551 INFO [stderr] 
Dec 18 16:49:20.582 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.52s
Dec 18 16:49:20.895 INFO running `"docker" "inspect" "413f519ffc7b4fe96df3caee6e619501a69189ffcacb70711539f83887ad9c9d"`
Dec 18 16:49:21.148 INFO running `"docker" "rm" "-f" "413f519ffc7b4fe96df3caee6e619501a69189ffcacb70711539f83887ad9c9d"`
Dec 18 16:49:21.472 INFO [stdout] 413f519ffc7b4fe96df3caee6e619501a69189ffcacb70711539f83887ad9c9d