[INFO] crate rs-docker 0.0.51 is already in cache
[INFO] extracting crate rs-docker 0.0.51 into work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/reg/rs-docker/0.0.51
[INFO] extracting crate rs-docker 0.0.51 into work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/reg/rs-docker/0.0.51
[INFO] validating manifest of rs-docker-0.0.51 on toolchain master#1891bfa80364eead426517c68de6947b7692e2de
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rs-docker-0.0.51 on toolchain try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rs-docker-0.0.51
[INFO] finished frobbing rs-docker-0.0.51
[INFO] frobbed toml for rs-docker-0.0.51 written to work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/reg/rs-docker/0.0.51/Cargo.toml
[INFO] started frobbing rs-docker-0.0.51
[INFO] finished frobbing rs-docker-0.0.51
[INFO] frobbed toml for rs-docker-0.0.51 written to work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/reg/rs-docker/0.0.51/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking rs-docker-0.0.51 against try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a for pr-60261
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60261/worker-7/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/reg/rs-docker/0.0.51:/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" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2749aaa8e9548fd273c13b0ef574da34fe8476ceb7089516ed5f24c0cc51b08a
[INFO] running `"docker" "start" "-a" "2749aaa8e9548fd273c13b0ef574da34fe8476ceb7089516ed5f24c0cc51b08a"`
[INFO] [stderr]     Checking rs-docker v0.0.51 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/docker.rs:408:21
[INFO] [stderr]     |
[INFO] [stderr] 408 |                 let mut stream = self.unix_stream.as_mut().unwrap();
[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/docker.rs:412:21
[INFO] [stderr]     |
[INFO] [stderr] 412 |                 let mut stream = self.tcp_stream.as_mut().unwrap();
[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/docker.rs:408:21
[INFO] [stderr]     |
[INFO] [stderr] 408 |                 let mut stream = self.unix_stream.as_mut().unwrap();
[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/docker.rs:412:21
[INFO] [stderr]     |
[INFO] [stderr] 412 |                 let mut stream = self.tcp_stream.as_mut().unwrap();
[INFO] [stderr]     |                     ----^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.11s
[INFO] running `"docker" "inspect" "2749aaa8e9548fd273c13b0ef574da34fe8476ceb7089516ed5f24c0cc51b08a"`
[INFO] running `"docker" "rm" "-f" "2749aaa8e9548fd273c13b0ef574da34fe8476ceb7089516ed5f24c0cc51b08a"`
[INFO] [stdout] 2749aaa8e9548fd273c13b0ef574da34fe8476ceb7089516ed5f24c0cc51b08a