[INFO] updating cached repository lempiy/Weiler-Atherton-Clipping
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lempiy/Weiler-Atherton-Clipping
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lempiy/Weiler-Atherton-Clipping" "work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/lempiy/Weiler-Atherton-Clipping"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/lempiy/Weiler-Atherton-Clipping'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lempiy/Weiler-Atherton-Clipping" "work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/lempiy/Weiler-Atherton-Clipping"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/lempiy/Weiler-Atherton-Clipping'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c8de3a0ab14e59b2c636540c4d6ca1217038aa72
[INFO] sha for GitHub repo lempiy/Weiler-Atherton-Clipping: c8de3a0ab14e59b2c636540c4d6ca1217038aa72
[INFO] validating manifest of lempiy/Weiler-Atherton-Clipping on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of lempiy/Weiler-Atherton-Clipping on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing lempiy/Weiler-Atherton-Clipping
[INFO] finished frobbing lempiy/Weiler-Atherton-Clipping
[INFO] frobbed toml for lempiy/Weiler-Atherton-Clipping written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/lempiy/Weiler-Atherton-Clipping/Cargo.toml
[INFO] started frobbing lempiy/Weiler-Atherton-Clipping
[INFO] finished frobbing lempiy/Weiler-Atherton-Clipping
[INFO] frobbed toml for lempiy/Weiler-Atherton-Clipping written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/lempiy/Weiler-Atherton-Clipping/Cargo.toml
[INFO] crate lempiy/Weiler-Atherton-Clipping already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking lempiy/Weiler-Atherton-Clipping against try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-1/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/lempiy/Weiler-Atherton-Clipping:/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" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 63d7c0b6adf3ebad1ce5e971f13d78b226531be3ee0a92f3578326ab0e7c3eac
[INFO] running `"docker" "start" "-a" "63d7c0b6adf3ebad1ce5e971f13d78b226531be3ee0a92f3578326ab0e7c3eac"`
[INFO] [stderr]     Checking poly v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/clip.rs:138:17
[INFO] [stderr]     |
[INFO] [stderr] 138 |             let mut j = if i != self.points.len() - 1 { i + 1 } else { 0 };
[INFO] [stderr]     |                 ----^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/clip.rs:153:38
[INFO] [stderr]     |
[INFO] [stderr] 153 |                 PolyListOption::List(mut clip_list) => {
[INFO] [stderr]     |                                      ----^^^^^^^^^
[INFO] [stderr]     |                                      |
[INFO] [stderr]     |                                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/clip.rs:138:17
[INFO] [stderr]     |
[INFO] [stderr] 138 |             let mut j = if i != self.points.len() - 1 { i + 1 } else { 0 };
[INFO] [stderr]     |                 ----^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/clip.rs:153:38
[INFO] [stderr]     |
[INFO] [stderr] 153 |                 PolyListOption::List(mut clip_list) => {
[INFO] [stderr]     |                                      ----^^^^^^^^^
[INFO] [stderr]     |                                      |
[INFO] [stderr]     |                                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `"docker" "inspect" "63d7c0b6adf3ebad1ce5e971f13d78b226531be3ee0a92f3578326ab0e7c3eac"`
[INFO] running `"docker" "rm" "-f" "63d7c0b6adf3ebad1ce5e971f13d78b226531be3ee0a92f3578326ab0e7c3eac"`
[INFO] [stdout] 63d7c0b6adf3ebad1ce5e971f13d78b226531be3ee0a92f3578326ab0e7c3eac