Dec 18 06:23:46.604 INFO checking MikkelSchubert/disk_usage against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 06:23:46.604 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/MikkelSchubert/disk_usage:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 06:23:46.787 INFO [stdout] 511b5d10a44046b7c4f71d29f9d81dfd1f49860f4065506fb69bc8454f2a56bc
Dec 18 06:23:46.794 INFO running `"docker" "start" "-a" "511b5d10a44046b7c4f71d29f9d81dfd1f49860f4065506fb69bc8454f2a56bc"`
Dec 18 06:23:47.612 INFO [stderr]     Checking nix v0.6.0
Dec 18 06:23:50.353 INFO [stderr]     Checking disk_usage v0.1.0 (/opt/crater/workdir)
Dec 18 06:23:50.808 INFO [stderr] warning: variable does not need to be mutable
Dec 18 06:23:50.808 INFO [stderr]    --> src/main.rs:120:13
Dec 18 06:23:50.808 INFO [stderr]     |
Dec 18 06:23:50.808 INFO [stderr] 120 |         let mut user = users.entry(metadata.uid()).or_insert_with(|| {
Dec 18 06:23:50.808 INFO [stderr]     |             ----^^^^
Dec 18 06:23:50.808 INFO [stderr]     |             |
Dec 18 06:23:50.808 INFO [stderr]     |             help: remove this `mut`
Dec 18 06:23:50.808 INFO [stderr]     |
Dec 18 06:23:50.808 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 06:23:50.808 INFO [stderr] 
Dec 18 06:23:50.808 INFO [stderr] warning: variable does not need to be mutable
Dec 18 06:23:50.808 INFO [stderr]    --> src/main.rs:120:13
Dec 18 06:23:50.808 INFO [stderr]     |
Dec 18 06:23:50.808 INFO [stderr] 120 |         let mut user = users.entry(metadata.uid()).or_insert_with(|| {
Dec 18 06:23:50.808 INFO [stderr]     |             ----^^^^
Dec 18 06:23:50.808 INFO [stderr]     |             |
Dec 18 06:23:50.808 INFO [stderr]     |             help: remove this `mut`
Dec 18 06:23:50.808 INFO [stderr] 
Dec 18 06:23:50.956 INFO [stderr] warning: variable does not need to be mutable
Dec 18 06:23:50.956 INFO [stderr]    --> src/main.rs:120:13
Dec 18 06:23:50.956 INFO [stderr]     |
Dec 18 06:23:50.956 INFO [stderr] 120 |         let mut user = users.entry(metadata.uid()).or_insert_with(|| {
Dec 18 06:23:50.956 INFO [stderr]     |             ----^^^^
Dec 18 06:23:50.956 INFO [stderr]     |             |
Dec 18 06:23:50.956 INFO [stderr]     |             help: remove this `mut`
Dec 18 06:23:50.956 INFO [stderr]     |
Dec 18 06:23:50.956 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 06:23:50.956 INFO [stderr] 
Dec 18 06:23:50.956 INFO [stderr] warning: variable does not need to be mutable
Dec 18 06:23:50.956 INFO [stderr]    --> src/main.rs:120:13
Dec 18 06:23:50.956 INFO [stderr]     |
Dec 18 06:23:50.956 INFO [stderr] 120 |         let mut user = users.entry(metadata.uid()).or_insert_with(|| {
Dec 18 06:23:50.956 INFO [stderr]     |             ----^^^^
Dec 18 06:23:50.956 INFO [stderr]     |             |
Dec 18 06:23:50.956 INFO [stderr]     |             help: remove this `mut`
Dec 18 06:23:50.956 INFO [stderr] 
Dec 18 06:23:51.012 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.51s
Dec 18 06:23:51.628 INFO running `"docker" "inspect" "511b5d10a44046b7c4f71d29f9d81dfd1f49860f4065506fb69bc8454f2a56bc"`
Dec 18 06:23:51.944 INFO running `"docker" "rm" "-f" "511b5d10a44046b7c4f71d29f9d81dfd1f49860f4065506fb69bc8454f2a56bc"`
Dec 18 06:23:52.335 INFO [stdout] 511b5d10a44046b7c4f71d29f9d81dfd1f49860f4065506fb69bc8454f2a56bc