Dec 19 18:43:45.230 INFO checking crazymerlyn/engine against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 18:43:45.231 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/crazymerlyn/engine:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 18:43:45.535 INFO [stdout] b74106302605a156f892e4591e444dfba3d5449f42a6a292ee5c1e6e762b4bc1
Dec 19 18:43:45.538 INFO running `"docker" "start" "-a" "b74106302605a156f892e4591e444dfba3d5449f42a6a292ee5c1e6e762b4bc1"`
Dec 19 18:43:46.471 INFO [stderr]     Checking engine v0.1.0 (/opt/crater/workdir)
Dec 19 18:43:46.866 INFO [stderr] warning: variable does not need to be mutable
Dec 19 18:43:46.867 INFO [stderr]    --> src/boxes.rs:106:13
Dec 19 18:43:46.867 INFO [stderr]     |
Dec 19 18:43:46.867 INFO [stderr] 106 |         let mut border_left = style.lookup("border-left-width", "border-width", &zero);
Dec 19 18:43:46.868 INFO [stderr]     |             ----^^^^^^^^^^^
Dec 19 18:43:46.868 INFO [stderr]     |             |
Dec 19 18:43:46.868 INFO [stderr]     |             help: remove this `mut`
Dec 19 18:43:46.868 INFO [stderr]     |
Dec 19 18:43:46.869 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 19 18:43:46.869 INFO [stderr] 
Dec 19 18:43:46.869 INFO [stderr] warning: variable does not need to be mutable
Dec 19 18:43:46.869 INFO [stderr]    --> src/boxes.rs:107:13
Dec 19 18:43:46.870 INFO [stderr]     |
Dec 19 18:43:46.870 INFO [stderr] 107 |         let mut border_right = style.lookup("border-right-width", "border-width", &zero);
Dec 19 18:43:46.891 INFO [stderr]     |             ----^^^^^^^^^^^^
Dec 19 18:43:46.892 INFO [stderr]     |             |
Dec 19 18:43:46.892 INFO [stderr]     |             help: remove this `mut`
Dec 19 18:43:46.892 INFO [stderr] 
Dec 19 18:43:46.892 INFO [stderr] warning: variable does not need to be mutable
Dec 19 18:43:46.892 INFO [stderr]    --> src/boxes.rs:109:13
Dec 19 18:43:46.892 INFO [stderr]     |
Dec 19 18:43:46.892 INFO [stderr] 109 |         let mut padding_left = style.lookup("padding-left", "padding", &zero);
Dec 19 18:43:46.892 INFO [stderr]     |             ----^^^^^^^^^^^^
Dec 19 18:43:46.892 INFO [stderr]     |             |
Dec 19 18:43:46.892 INFO [stderr]     |             help: remove this `mut`
Dec 19 18:43:46.892 INFO [stderr] 
Dec 19 18:43:46.892 INFO [stderr] warning: variable does not need to be mutable
Dec 19 18:43:46.892 INFO [stderr]    --> src/boxes.rs:110:13
Dec 19 18:43:46.892 INFO [stderr]     |
Dec 19 18:43:46.892 INFO [stderr] 110 |         let mut padding_right = style.lookup("padding-right", "padding", &zero);
Dec 19 18:43:46.892 INFO [stderr]     |             ----^^^^^^^^^^^^^
Dec 19 18:43:46.892 INFO [stderr]     |             |
Dec 19 18:43:46.892 INFO [stderr]     |             help: remove this `mut`
Dec 19 18:43:46.892 INFO [stderr] 
Dec 19 18:43:46.892 INFO [stderr] warning: variable does not need to be mutable
Dec 19 18:43:46.892 INFO [stderr]    --> src/boxes.rs:106:13
Dec 19 18:43:46.892 INFO [stderr]     |
Dec 19 18:43:46.892 INFO [stderr] 106 |         let mut border_left = style.lookup("border-left-width", "border-width", &zero);
Dec 19 18:43:46.892 INFO [stderr]     |             ----^^^^^^^^^^^
Dec 19 18:43:46.892 INFO [stderr]     |             |
Dec 19 18:43:46.892 INFO [stderr]     |             help: remove this `mut`
Dec 19 18:43:46.892 INFO [stderr]     |
Dec 19 18:43:46.892 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 19 18:43:46.892 INFO [stderr] 
Dec 19 18:43:46.892 INFO [stderr] warning: variable does not need to be mutable
Dec 19 18:43:46.892 INFO [stderr]    --> src/boxes.rs:107:13
Dec 19 18:43:46.892 INFO [stderr]     |
Dec 19 18:43:46.892 INFO [stderr] 107 |         let mut border_right = style.lookup("border-right-width", "border-width", &zero);
Dec 19 18:43:46.892 INFO [stderr]     |             ----^^^^^^^^^^^^
Dec 19 18:43:46.892 INFO [stderr]     |             |
Dec 19 18:43:46.892 INFO [stderr]     |             help: remove this `mut`
Dec 19 18:43:46.892 INFO [stderr] 
Dec 19 18:43:46.892 INFO [stderr] warning: variable does not need to be mutable
Dec 19 18:43:46.892 INFO [stderr]    --> src/boxes.rs:109:13
Dec 19 18:43:46.892 INFO [stderr]     |
Dec 19 18:43:46.892 INFO [stderr] 109 |         let mut padding_left = style.lookup("padding-left", "padding", &zero);
Dec 19 18:43:46.892 INFO [stderr]     |             ----^^^^^^^^^^^^
Dec 19 18:43:46.892 INFO [stderr]     |             |
Dec 19 18:43:46.892 INFO [stderr]     |             help: remove this `mut`
Dec 19 18:43:46.892 INFO [stderr] 
Dec 19 18:43:46.892 INFO [stderr] warning: variable does not need to be mutable
Dec 19 18:43:46.892 INFO [stderr]    --> src/boxes.rs:110:13
Dec 19 18:43:46.892 INFO [stderr]     |
Dec 19 18:43:46.892 INFO [stderr] 110 |         let mut padding_right = style.lookup("padding-right", "padding", &zero);
Dec 19 18:43:46.892 INFO [stderr]     |             ----^^^^^^^^^^^^^
Dec 19 18:43:46.892 INFO [stderr]     |             |
Dec 19 18:43:46.892 INFO [stderr]     |             help: remove this `mut`
Dec 19 18:43:46.892 INFO [stderr] 
Dec 19 18:43:46.925 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.45s
Dec 19 18:43:47.148 INFO running `"docker" "inspect" "b74106302605a156f892e4591e444dfba3d5449f42a6a292ee5c1e6e762b4bc1"`
Dec 19 18:43:47.242 INFO running `"docker" "rm" "-f" "b74106302605a156f892e4591e444dfba3d5449f42a6a292ee5c1e6e762b4bc1"`
Dec 19 18:43:47.336 INFO [stdout] b74106302605a156f892e4591e444dfba3d5449f42a6a292ee5c1e6e762b4bc1