Dec 19 12:38:53.996 INFO checking mike706574/rust-json-file-deserialization-example against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 12:38:53.996 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/mike706574/rust-json-file-deserialization-example:/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 12:38:54.472 INFO [stdout] 07b62ce38b6984453ade322a093f6c29726a18eed37aa3e38e7414bf5786cc47
Dec 19 12:38:54.472 INFO running `"docker" "start" "-a" "07b62ce38b6984453ade322a093f6c29726a18eed37aa3e38e7414bf5786cc47"`
Dec 19 12:38:55.855 INFO [stderr]     Checking foo v0.1.0 (/opt/crater/workdir)
Dec 19 12:38:56.288 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:38:56.288 INFO [stderr]   --> src/main.rs:26:5
Dec 19 12:38:56.288 INFO [stderr]    |
Dec 19 12:38:56.288 INFO [stderr] 26 |     example();
Dec 19 12:38:56.288 INFO [stderr]    |     ^^^^^^^^^^
Dec 19 12:38:56.288 INFO [stderr]    |
Dec 19 12:38:56.288 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 12:38:56.288 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:38:56.288 INFO [stderr] 
Dec 19 12:38:56.292 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:38:56.292 INFO [stderr]   --> src/main.rs:26:5
Dec 19 12:38:56.292 INFO [stderr]    |
Dec 19 12:38:56.292 INFO [stderr] 26 |     example();
Dec 19 12:38:56.292 INFO [stderr]    |     ^^^^^^^^^^
Dec 19 12:38:56.292 INFO [stderr]    |
Dec 19 12:38:56.292 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 12:38:56.292 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:38:56.292 INFO [stderr] 
Dec 19 12:38:56.329 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
Dec 19 12:38:57.373 INFO running `"docker" "inspect" "07b62ce38b6984453ade322a093f6c29726a18eed37aa3e38e7414bf5786cc47"`
Dec 19 12:38:57.754 INFO running `"docker" "rm" "-f" "07b62ce38b6984453ade322a093f6c29726a18eed37aa3e38e7414bf5786cc47"`
Dec 19 12:38:58.060 INFO [stdout] 07b62ce38b6984453ade322a093f6c29726a18eed37aa3e38e7414bf5786cc47