Dec 19 10:57:03.271 INFO checking pietrocarbo/rust_first_steps against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 10:57:03.271 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/pietrocarbo/rust_first_steps:/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 10:57:03.640 INFO [stdout] 54e270ac9f9152f2171a6dfeb7ddab6610b7e71e3e69a774b70e9614e2e9c607
Dec 19 10:57:03.646 INFO running `"docker" "start" "-a" "54e270ac9f9152f2171a6dfeb7ddab6610b7e71e3e69a774b70e9614e2e9c607"`
Dec 19 10:57:05.448 INFO [stderr]     Checking presentation v0.1.0 (/opt/crater/workdir)
Dec 19 10:57:05.926 INFO [stderr] warning: function is never used: `file_parse_verbose`
Dec 19 10:57:05.926 INFO [stderr]   --> src/bin/3_error_IO.rs:12:1
Dec 19 10:57:05.926 INFO [stderr]    |
Dec 19 10:57:05.926 INFO [stderr] 12 | fn file_parse_verbose<P: AsRef<Path>>(file_path: P) -> Result<i32, CustomError> {
Dec 19 10:57:05.926 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:57:05.933 INFO [stderr]    |
Dec 19 10:57:05.933 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 10:57:05.933 INFO [stderr] 
Dec 19 10:57:05.933 INFO [stderr] warning: crate `3_error_IO` should have a snake case name such as `3_error_io`
Dec 19 10:57:05.933 INFO [stderr]   |
Dec 19 10:57:05.933 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 19 10:57:05.933 INFO [stderr] 
Dec 19 10:57:06.386 INFO [stderr] warning: function is never used: `file_parse_verbose`
Dec 19 10:57:06.390 INFO [stderr]   --> src/bin/3_error_IO.rs:12:1
Dec 19 10:57:06.390 INFO [stderr]    |
Dec 19 10:57:06.390 INFO [stderr] 12 | fn file_parse_verbose<P: AsRef<Path>>(file_path: P) -> Result<i32, CustomError> {
Dec 19 10:57:06.390 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:57:06.390 INFO [stderr]    |
Dec 19 10:57:06.390 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 10:57:06.390 INFO [stderr] 
Dec 19 10:57:06.390 INFO [stderr] warning: crate `3_error_IO` should have a snake case name such as `3_error_io`
Dec 19 10:57:06.390 INFO [stderr]   |
Dec 19 10:57:06.390 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 19 10:57:06.390 INFO [stderr] 
Dec 19 10:57:06.461 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.08s
Dec 19 10:57:07.106 INFO running `"docker" "inspect" "54e270ac9f9152f2171a6dfeb7ddab6610b7e71e3e69a774b70e9614e2e9c607"`
Dec 19 10:57:07.306 INFO running `"docker" "rm" "-f" "54e270ac9f9152f2171a6dfeb7ddab6610b7e71e3e69a774b70e9614e2e9c607"`
Dec 19 10:57:07.672 INFO [stdout] 54e270ac9f9152f2171a6dfeb7ddab6610b7e71e3e69a774b70e9614e2e9c607