Dec 04 07:34:22.043 INFO checking vksmgr/read_file against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 07:34:22.043 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-7/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 04 07:34:22.481 INFO [stdout] 39a426eea74268189ccd3f35872de7373800b620ca9c60d0f36ad424174c9667
Dec 04 07:34:22.483 INFO running `"docker" "start" "-a" "39a426eea74268189ccd3f35872de7373800b620ca9c60d0f36ad424174c9667"`
Dec 04 07:34:24.215 INFO [stderr] usermod: no changes
Dec 04 07:34:24.313 INFO [stderr]     Checking os v0.1.0 (/source)
Dec 04 07:34:24.739 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 07:34:24.739 INFO [stderr]  --> src/main.rs:5:5
Dec 04 07:34:24.739 INFO [stderr]   |
Dec 04 07:34:24.739 INFO [stderr] 5 |     read_all_lines("test.txt");
Dec 04 07:34:24.739 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 07:34:24.759 INFO [stderr]   |
Dec 04 07:34:24.759 INFO [stderr]   = note: #[warn(unused_must_use)] on by default
Dec 04 07:34:24.759 INFO [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 07:34:24.759 INFO [stderr] 
Dec 04 07:34:24.762 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 07:34:24.762 INFO [stderr]  --> src/main.rs:5:5
Dec 04 07:34:24.762 INFO [stderr]   |
Dec 04 07:34:24.762 INFO [stderr] 5 |     read_all_lines("test.txt");
Dec 04 07:34:24.762 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 07:34:24.762 INFO [stderr]   |
Dec 04 07:34:24.762 INFO [stderr]   = note: #[warn(unused_must_use)] on by default
Dec 04 07:34:24.762 INFO [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 07:34:24.762 INFO [stderr] 
Dec 04 07:34:24.822 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
Dec 04 07:34:24.824 INFO [stderr] su: No module specific data is present
Dec 04 07:34:26.101 INFO running `"docker" "inspect" "39a426eea74268189ccd3f35872de7373800b620ca9c60d0f36ad424174c9667"`
Dec 04 07:34:26.379 INFO running `"docker" "rm" "-f" "39a426eea74268189ccd3f35872de7373800b620ca9c60d0f36ad424174c9667"`
Dec 04 07:34:26.774 INFO [stdout] 39a426eea74268189ccd3f35872de7373800b620ca9c60d0f36ad424174c9667