Dec 19 19:13:19.016 INFO checking cedricleroy/rust-tuto against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 19:13:19.016 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/cedricleroy/rust-tuto:/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 19:13:19.432 INFO [stdout] ede56fce6fcebd09c38b209dd1896f707ea9eec0041a2bd33ff045227c818b0d
Dec 19 19:13:19.434 INFO running `"docker" "start" "-a" "ede56fce6fcebd09c38b209dd1896f707ea9eec0041a2bd33ff045227c818b0d"`
Dec 19 19:13:21.093 INFO [stderr]     Checking rust-tuto v0.1.0 (/opt/crater/workdir)
Dec 19 19:13:21.492 INFO [stderr] warning: value assigned to `y` is never read
Dec 19 19:13:21.492 INFO [stderr]   --> src/main.rs:13:13
Dec 19 19:13:21.492 INFO [stderr]    |
Dec 19 19:13:21.492 INFO [stderr] 13 |     let mut y = 21;
Dec 19 19:13:21.492 INFO [stderr]    |             ^
Dec 19 19:13:21.492 INFO [stderr]    |
Dec 19 19:13:21.492 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 19 19:13:21.492 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 19:13:21.492 INFO [stderr] 
Dec 19 19:13:21.520 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:13:21.520 INFO [stderr]   --> src/json.rs:12:5
Dec 19 19:13:21.520 INFO [stderr]    |
Dec 19 19:13:21.520 INFO [stderr] 12 |     file.read_to_string(&mut content);
Dec 19 19:13:21.520 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:13:21.520 INFO [stderr]    |
Dec 19 19:13:21.520 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 19:13:21.524 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:13:21.524 INFO [stderr] 
Dec 19 19:13:21.584 INFO [stderr] warning: value assigned to `y` is never read
Dec 19 19:13:21.584 INFO [stderr]   --> src/main.rs:13:13
Dec 19 19:13:21.584 INFO [stderr]    |
Dec 19 19:13:21.584 INFO [stderr] 13 |     let mut y = 21;
Dec 19 19:13:21.584 INFO [stderr]    |             ^
Dec 19 19:13:21.584 INFO [stderr]    |
Dec 19 19:13:21.584 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 19 19:13:21.584 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 19:13:21.584 INFO [stderr] 
Dec 19 19:13:21.608 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:13:21.608 INFO [stderr]   --> src/json.rs:12:5
Dec 19 19:13:21.608 INFO [stderr]    |
Dec 19 19:13:21.608 INFO [stderr] 12 |     file.read_to_string(&mut content);
Dec 19 19:13:21.608 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:13:21.608 INFO [stderr]    |
Dec 19 19:13:21.608 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 19:13:21.608 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:13:21.608 INFO [stderr] 
Dec 19 19:13:21.644 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
Dec 19 19:13:22.300 INFO running `"docker" "inspect" "ede56fce6fcebd09c38b209dd1896f707ea9eec0041a2bd33ff045227c818b0d"`
Dec 19 19:13:22.586 INFO running `"docker" "rm" "-f" "ede56fce6fcebd09c38b209dd1896f707ea9eec0041a2bd33ff045227c818b0d"`
Dec 19 19:13:22.887 INFO [stdout] ede56fce6fcebd09c38b209dd1896f707ea9eec0041a2bd33ff045227c818b0d