Dec 18 16:31:34.058 INFO checking file_logger-0.1.0 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 16:31:34.058 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-3/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/file_logger/0.1.0:/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 16:31:34.404 INFO [stdout] a06a870bb62e23371415d9a32287a3f90621840049e8c1696dc7297bf742e2b7
Dec 18 16:31:34.410 INFO running `"docker" "start" "-a" "a06a870bb62e23371415d9a32287a3f90621840049e8c1696dc7297bf742e2b7"`
Dec 18 16:31:35.216 INFO [stderr]     Checking file_logger v0.1.0 (/opt/crater/workdir)
Dec 18 16:31:35.816 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:31:35.816 INFO [stderr]   --> src/format.rs:71:40
Dec 18 16:31:35.816 INFO [stderr]    |
Dec 18 16:31:35.816 INFO [stderr] 71 |     pub fn format<W: io::Write>(&self, mut w:  &mut W, record: &LogRecord, datetime: &Tm) -> Result<(), Error>{
Dec 18 16:31:35.816 INFO [stderr]    |                                        ----^
Dec 18 16:31:35.816 INFO [stderr]    |                                        |
Dec 18 16:31:35.816 INFO [stderr]    |                                        help: remove this `mut`
Dec 18 16:31:35.816 INFO [stderr]    |
Dec 18 16:31:35.816 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 16:31:35.816 INFO [stderr] 
Dec 18 16:31:35.871 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:31:35.871 INFO [stderr]   --> src/format.rs:71:40
Dec 18 16:31:35.871 INFO [stderr]    |
Dec 18 16:31:35.871 INFO [stderr] 71 |     pub fn format<W: io::Write>(&self, mut w:  &mut W, record: &LogRecord, datetime: &Tm) -> Result<(), Error>{
Dec 18 16:31:35.871 INFO [stderr]    |                                        ----^
Dec 18 16:31:35.871 INFO [stderr]    |                                        |
Dec 18 16:31:35.871 INFO [stderr]    |                                        help: remove this `mut`
Dec 18 16:31:35.871 INFO [stderr]    |
Dec 18 16:31:35.871 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 16:31:35.871 INFO [stderr] 
Dec 18 16:31:36.428 INFO [stderr] warning: unused import: `OnError`
Dec 18 16:31:36.428 INFO [stderr]  --> src/main.rs:6:40
Dec 18 16:31:36.428 INFO [stderr]   |
Dec 18 16:31:36.428 INFO [stderr] 6 | use self::file_logger::{LoggerBuilder, OnError};
Dec 18 16:31:36.428 INFO [stderr]   |                                        ^^^^^^^
Dec 18 16:31:36.428 INFO [stderr]   |
Dec 18 16:31:36.428 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 16:31:36.428 INFO [stderr] 
Dec 18 16:31:36.436 INFO [stderr] warning: unused import: `OnError`
Dec 18 16:31:36.436 INFO [stderr]  --> src/main.rs:6:40
Dec 18 16:31:36.436 INFO [stderr]   |
Dec 18 16:31:36.436 INFO [stderr] 6 | use self::file_logger::{LoggerBuilder, OnError};
Dec 18 16:31:36.436 INFO [stderr]   |                                        ^^^^^^^
Dec 18 16:31:36.436 INFO [stderr]   |
Dec 18 16:31:36.436 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 16:31:36.436 INFO [stderr] 
Dec 18 16:31:36.456 INFO [stderr] warning: unused variable: `regex`
Dec 18 16:31:36.456 INFO [stderr]  --> src/main.rs:9:9
Dec 18 16:31:36.456 INFO [stderr]   |
Dec 18 16:31:36.456 INFO [stderr] 9 |     let regex = Regex::new("test").unwrap();
Dec 18 16:31:36.456 INFO [stderr]   |         ^^^^^ help: consider using `_regex` instead
Dec 18 16:31:36.456 INFO [stderr]   |
Dec 18 16:31:36.456 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 18 16:31:36.456 INFO [stderr] 
Dec 18 16:31:36.464 INFO [stderr] warning: unused variable: `regex`
Dec 18 16:31:36.464 INFO [stderr]  --> src/main.rs:9:9
Dec 18 16:31:36.464 INFO [stderr]   |
Dec 18 16:31:36.464 INFO [stderr] 9 |     let regex = Regex::new("test").unwrap();
Dec 18 16:31:36.464 INFO [stderr]   |         ^^^^^ help: consider using `_regex` instead
Dec 18 16:31:36.464 INFO [stderr]   |
Dec 18 16:31:36.464 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 18 16:31:36.464 INFO [stderr] 
Dec 18 16:31:36.500 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.32s
Dec 18 16:31:36.724 INFO running `"docker" "inspect" "a06a870bb62e23371415d9a32287a3f90621840049e8c1696dc7297bf742e2b7"`
Dec 18 16:31:36.816 INFO running `"docker" "rm" "-f" "a06a870bb62e23371415d9a32287a3f90621840049e8c1696dc7297bf742e2b7"`
Dec 18 16:31:36.884 INFO [stdout] a06a870bb62e23371415d9a32287a3f90621840049e8c1696dc7297bf742e2b7