[INFO] crate buf_redux 0.8.1 is already in cache
[INFO] extracting crate buf_redux 0.8.1 into work/ex/pr-60932/sources/master#548add7f61bfcbe3bea3f5ccefb53c84da8fefe4/reg/buf_redux/0.8.1
[INFO] extracting crate buf_redux 0.8.1 into work/ex/pr-60932/sources/try#097e26225c5cc28d3042ad4c80eac7c488f78ee7/reg/buf_redux/0.8.1
[INFO] validating manifest of buf_redux-0.8.1 on toolchain master#548add7f61bfcbe3bea3f5ccefb53c84da8fefe4
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+548add7f61bfcbe3bea3f5ccefb53c84da8fefe4-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of buf_redux-0.8.1 on toolchain try#097e26225c5cc28d3042ad4c80eac7c488f78ee7
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+097e26225c5cc28d3042ad4c80eac7c488f78ee7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing buf_redux-0.8.1
[INFO] finished frobbing buf_redux-0.8.1
[INFO] frobbed toml for buf_redux-0.8.1 written to work/ex/pr-60932/sources/master#548add7f61bfcbe3bea3f5ccefb53c84da8fefe4/reg/buf_redux/0.8.1/Cargo.toml
[INFO] started frobbing buf_redux-0.8.1
[INFO] finished frobbing buf_redux-0.8.1
[INFO] frobbed toml for buf_redux-0.8.1 written to work/ex/pr-60932/sources/try#097e26225c5cc28d3042ad4c80eac7c488f78ee7/reg/buf_redux/0.8.1/Cargo.toml
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+548add7f61bfcbe3bea3f5ccefb53c84da8fefe4-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+097e26225c5cc28d3042ad4c80eac7c488f78ee7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+548add7f61bfcbe3bea3f5ccefb53c84da8fefe4-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+097e26225c5cc28d3042ad4c80eac7c488f78ee7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] checking buf_redux-0.8.1 against try#097e26225c5cc28d3042ad4c80eac7c488f78ee7 for pr-60932
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60932/worker-1/try#097e26225c5cc28d3042ad4c80eac7c488f78ee7:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60932/sources/try#097e26225c5cc28d3042ad4c80eac7c488f78ee7/reg/buf_redux/0.8.1:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+097e26225c5cc28d3042ad4c80eac7c488f78ee7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 49e63676c1c1b3dcbd04bf757b88de2ecf200307384c1ea227908f1f73dbe48f
[INFO] running `"docker" "start" "-a" "49e63676c1c1b3dcbd04bf757b88de2ecf200307384c1ea227908f1f73dbe48f"`
[INFO] [stderr]     Checking buf_redux v0.8.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/lib.rs:1049:17
[INFO] [stderr]      |
[INFO] [stderr] 1049 |             let mut buf = unsafe { self.buf.write_buf() };
[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/lib.rs:1067:17
[INFO] [stderr]      |
[INFO] [stderr] 1067 |             let mut buf = self.buf.write_buf();
[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/lib.rs:1049:17
[INFO] [stderr]      |
[INFO] [stderr] 1049 |             let mut buf = unsafe { self.buf.write_buf() };
[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/lib.rs:1067:17
[INFO] [stderr]      |
[INFO] [stderr] 1067 |             let mut buf = self.buf.write_buf();
[INFO] [stderr]      |                 ----^^^
[INFO] [stderr]      |                 |
[INFO] [stderr]      |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.65s
[INFO] running `"docker" "inspect" "49e63676c1c1b3dcbd04bf757b88de2ecf200307384c1ea227908f1f73dbe48f"`
[INFO] running `"docker" "rm" "-f" "49e63676c1c1b3dcbd04bf757b88de2ecf200307384c1ea227908f1f73dbe48f"`
[INFO] [stdout] 49e63676c1c1b3dcbd04bf757b88de2ecf200307384c1ea227908f1f73dbe48f