Dec 19 06:01:23.122 INFO checking vksmgr/read_file against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 06:01:23.123 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/vksmgr/read_file:/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 06:01:23.563 INFO [stdout] 9d1c46360186b0094c0afe4f8df5225424a57da5a2f8a9281737c31011903812
Dec 19 06:01:23.566 INFO running `"docker" "start" "-a" "9d1c46360186b0094c0afe4f8df5225424a57da5a2f8a9281737c31011903812"`
Dec 19 06:01:25.148 INFO [stderr]     Checking os v0.1.0 (/opt/crater/workdir)
Dec 19 06:01:25.399 INFO [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right': superseded by `trim_end`
Dec 19 06:01:25.399 INFO [stderr]   --> src/main.rs:37:37
Dec 19 06:01:25.399 INFO [stderr]    |
Dec 19 06:01:25.399 INFO [stderr] 37 |                 let line = self.buf.trim_right();
Dec 19 06:01:25.399 INFO [stderr]    |                                     ^^^^^^^^^^
Dec 19 06:01:25.399 INFO [stderr]    |
Dec 19 06:01:25.399 INFO [stderr]    = note: #[warn(deprecated)] on by default
Dec 19 06:01:25.399 INFO [stderr] 
Dec 19 06:01:25.424 INFO [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right': superseded by `trim_end`
Dec 19 06:01:25.424 INFO [stderr]   --> src/main.rs:37:37
Dec 19 06:01:25.424 INFO [stderr]    |
Dec 19 06:01:25.424 INFO [stderr] 37 |                 let line = self.buf.trim_right();
Dec 19 06:01:25.424 INFO [stderr]    |                                     ^^^^^^^^^^
Dec 19 06:01:25.424 INFO [stderr]    |
Dec 19 06:01:25.424 INFO [stderr]    = note: #[warn(deprecated)] on by default
Dec 19 06:01:25.424 INFO [stderr] 
Dec 19 06:01:25.436 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 06:01:25.436 INFO [stderr]  --> src/main.rs:5:5
Dec 19 06:01:25.436 INFO [stderr]   |
Dec 19 06:01:25.436 INFO [stderr] 5 |     read_all_lines("test.txt");
Dec 19 06:01:25.436 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 06:01:25.436 INFO [stderr]   |
Dec 19 06:01:25.436 INFO [stderr]   = note: #[warn(unused_must_use)] on by default
Dec 19 06:01:25.436 INFO [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 06:01:25.436 INFO [stderr] 
Dec 19 06:01:25.436 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 06:01:25.436 INFO [stderr]  --> src/main.rs:5:5
Dec 19 06:01:25.436 INFO [stderr]   |
Dec 19 06:01:25.436 INFO [stderr] 5 |     read_all_lines("test.txt");
Dec 19 06:01:25.436 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 06:01:25.436 INFO [stderr]   |
Dec 19 06:01:25.436 INFO [stderr]   = note: #[warn(unused_must_use)] on by default
Dec 19 06:01:25.436 INFO [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 06:01:25.436 INFO [stderr] 
Dec 19 06:01:25.497 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.38s
Dec 19 06:01:26.114 INFO running `"docker" "inspect" "9d1c46360186b0094c0afe4f8df5225424a57da5a2f8a9281737c31011903812"`
Dec 19 06:01:26.306 INFO running `"docker" "rm" "-f" "9d1c46360186b0094c0afe4f8df5225424a57da5a2f8a9281737c31011903812"`
Dec 19 06:01:26.496 INFO [stdout] 9d1c46360186b0094c0afe4f8df5225424a57da5a2f8a9281737c31011903812