Dec 18 14:57:53.295 INFO checking indexed-line-reader-0.2.0 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 14:57:53.295 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/reg/indexed-line-reader/0.2.0:/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 14:57:53.600 INFO [stdout] 338bf11fd643c61b151713a1c22d1d7e75079bd2601bdfdcfa697491885d0efc
Dec 18 14:57:53.602 INFO running `"docker" "start" "-a" "338bf11fd643c61b151713a1c22d1d7e75079bd2601bdfdcfa697491885d0efc"`
Dec 18 14:57:54.335 INFO [stderr]     Checking indexed-line-reader v0.2.0 (/opt/crater/workdir)
Dec 18 14:57:54.641 INFO [stderr] warning: variable does not need to be mutable
Dec 18 14:57:54.641 INFO [stderr]   --> src/lib.rs:89:50
Dec 18 14:57:54.641 INFO [stderr]    |
Dec 18 14:57:54.641 INFO [stderr] 89 |     pub fn compute<T: BufRead + Seek>(&mut self, mut reader: &mut T) -> Result<u64, Error> {
Dec 18 14:57:54.641 INFO [stderr]    |                                                  ----^^^^^^
Dec 18 14:57:54.641 INFO [stderr]    |                                                  |
Dec 18 14:57:54.641 INFO [stderr]    |                                                  help: remove this `mut`
Dec 18 14:57:54.641 INFO [stderr]    |
Dec 18 14:57:54.641 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 14:57:54.641 INFO [stderr] 
Dec 18 14:57:54.729 INFO [stderr] warning: variable does not need to be mutable
Dec 18 14:57:54.729 INFO [stderr]   --> src/lib.rs:89:50
Dec 18 14:57:54.729 INFO [stderr]    |
Dec 18 14:57:54.729 INFO [stderr] 89 |     pub fn compute<T: BufRead + Seek>(&mut self, mut reader: &mut T) -> Result<u64, Error> {
Dec 18 14:57:54.729 INFO [stderr]    |                                                  ----^^^^^^
Dec 18 14:57:54.729 INFO [stderr]    |                                                  |
Dec 18 14:57:54.729 INFO [stderr]    |                                                  help: remove this `mut`
Dec 18 14:57:54.729 INFO [stderr]    |
Dec 18 14:57:54.729 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 14:57:54.729 INFO [stderr] 
Dec 18 14:57:54.744 INFO [stderr] warning: variable does not need to be mutable
Dec 18 14:57:54.744 INFO [stderr]    --> src/lib.rs:296:13
Dec 18 14:57:54.744 INFO [stderr]     |
Dec 18 14:57:54.744 INFO [stderr] 296 |         let mut line_reader = &mut IndexedLineReader::new(BufReader::new(file_reader), 100);
Dec 18 14:57:54.744 INFO [stderr]     |             ----^^^^^^^^^^^
Dec 18 14:57:54.744 INFO [stderr]     |             |
Dec 18 14:57:54.744 INFO [stderr]     |             help: remove this `mut`
Dec 18 14:57:54.744 INFO [stderr] 
Dec 18 14:57:54.766 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.44s
Dec 18 14:57:55.056 INFO running `"docker" "inspect" "338bf11fd643c61b151713a1c22d1d7e75079bd2601bdfdcfa697491885d0efc"`
Dec 18 14:57:55.352 INFO running `"docker" "rm" "-f" "338bf11fd643c61b151713a1c22d1d7e75079bd2601bdfdcfa697491885d0efc"`
Dec 18 14:57:55.575 INFO [stdout] 338bf11fd643c61b151713a1c22d1d7e75079bd2601bdfdcfa697491885d0efc