Dec 19 15:31:29.972 INFO checking jacobvaneijk/dmr against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 15:31:29.972 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/jacobvaneijk/dmr:/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 15:31:30.400 INFO [stdout] 711ed4b08c1639866b3ec071af683a90a8c6af954774b7e717d3fe00b834dd20
Dec 19 15:31:30.402 INFO running `"docker" "start" "-a" "711ed4b08c1639866b3ec071af683a90a8c6af954774b7e717d3fe00b834dd20"`
Dec 19 15:31:31.913 INFO [stderr]     Checking dmr v0.1.0 (/opt/crater/workdir)
Dec 19 15:31:32.386 INFO [stderr] warning: unused variable: `output`
Dec 19 15:31:32.386 INFO [stderr]   --> src/main.rs:47:9
Dec 19 15:31:32.386 INFO [stderr]    |
Dec 19 15:31:32.386 INFO [stderr] 47 |     let output = match matches.opt_str("o") {
Dec 19 15:31:32.386 INFO [stderr]    |         ^^^^^^ help: consider using `_output` instead
Dec 19 15:31:32.386 INFO [stderr]    |
Dec 19 15:31:32.388 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 15:31:32.388 INFO [stderr] 
Dec 19 15:31:32.403 INFO [stderr] warning: variable does not need to be mutable
Dec 19 15:31:32.403 INFO [stderr]   --> src/driver.rs:28:9
Dec 19 15:31:32.403 INFO [stderr]    |
Dec 19 15:31:32.403 INFO [stderr] 28 |     let mut src = match read_file(filename) {
Dec 19 15:31:32.403 INFO [stderr]    |         ----^^^
Dec 19 15:31:32.403 INFO [stderr]    |         |
Dec 19 15:31:32.403 INFO [stderr]    |         help: remove this `mut`
Dec 19 15:31:32.403 INFO [stderr]    |
Dec 19 15:31:32.403 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 15:31:32.403 INFO [stderr] 
Dec 19 15:31:32.412 INFO [stderr] warning: unused variable: `output`
Dec 19 15:31:32.412 INFO [stderr]   --> src/main.rs:47:9
Dec 19 15:31:32.412 INFO [stderr]    |
Dec 19 15:31:32.412 INFO [stderr] 47 |     let output = match matches.opt_str("o") {
Dec 19 15:31:32.412 INFO [stderr]    |         ^^^^^^ help: consider using `_output` instead
Dec 19 15:31:32.412 INFO [stderr]    |
Dec 19 15:31:32.412 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 15:31:32.412 INFO [stderr] 
Dec 19 15:31:32.447 INFO [stderr] warning: variable does not need to be mutable
Dec 19 15:31:32.447 INFO [stderr]   --> src/driver.rs:28:9
Dec 19 15:31:32.447 INFO [stderr]    |
Dec 19 15:31:32.447 INFO [stderr] 28 |     let mut src = match read_file(filename) {
Dec 19 15:31:32.447 INFO [stderr]    |         ----^^^
Dec 19 15:31:32.447 INFO [stderr]    |         |
Dec 19 15:31:32.447 INFO [stderr]    |         help: remove this `mut`
Dec 19 15:31:32.447 INFO [stderr]    |
Dec 19 15:31:32.447 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 15:31:32.447 INFO [stderr] 
Dec 19 15:31:32.496 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
Dec 19 15:31:33.114 INFO running `"docker" "inspect" "711ed4b08c1639866b3ec071af683a90a8c6af954774b7e717d3fe00b834dd20"`
Dec 19 15:31:33.442 INFO running `"docker" "rm" "-f" "711ed4b08c1639866b3ec071af683a90a8c6af954774b7e717d3fe00b834dd20"`
Dec 19 15:31:33.712 INFO [stdout] 711ed4b08c1639866b3ec071af683a90a8c6af954774b7e717d3fe00b834dd20