Dec 19 12:38:54.500 INFO checking mike706574/rust-json-file-deserialization-example against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 12:38:54.500 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 12:38:55.042 INFO [stdout] a2235b2ff796bff2fbfe746e36e683ac68f629d0a838d4e679c0fc576ee34804
Dec 19 12:38:55.046 INFO running `"docker" "start" "-a" "a2235b2ff796bff2fbfe746e36e683ac68f629d0a838d4e679c0fc576ee34804"`
Dec 19 12:38:56.280 INFO [stderr]     Checking serde_json v1.0.2
Dec 19 12:38:58.140 INFO [stderr]     Checking foo v0.1.0 (/opt/crater/workdir)
Dec 19 12:38:58.707 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:38:58.707 INFO [stderr]   --> src/main.rs:26:5
Dec 19 12:38:58.707 INFO [stderr]    |
Dec 19 12:38:58.707 INFO [stderr] 26 |     example();
Dec 19 12:38:58.707 INFO [stderr]    |     ^^^^^^^^^^
Dec 19 12:38:58.707 INFO [stderr]    |
Dec 19 12:38:58.707 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 12:38:58.707 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:38:58.707 INFO [stderr] 
Dec 19 12:38:58.772 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:38:58.772 INFO [stderr]   --> src/main.rs:26:5
Dec 19 12:38:58.772 INFO [stderr]    |
Dec 19 12:38:58.772 INFO [stderr] 26 |     example();
Dec 19 12:38:58.772 INFO [stderr]    |     ^^^^^^^^^^
Dec 19 12:38:58.772 INFO [stderr]    |
Dec 19 12:38:58.772 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 12:38:58.772 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:38:58.772 INFO [stderr] 
Dec 19 12:38:58.825 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.62s
Dec 19 12:38:59.837 INFO running `"docker" "inspect" "a2235b2ff796bff2fbfe746e36e683ac68f629d0a838d4e679c0fc576ee34804"`
Dec 19 12:39:00.108 INFO running `"docker" "rm" "-f" "a2235b2ff796bff2fbfe746e36e683ac68f629d0a838d4e679c0fc576ee34804"`
Dec 19 12:39:00.448 INFO [stdout] a2235b2ff796bff2fbfe746e36e683ac68f629d0a838d4e679c0fc576ee34804