Dec 19 06:25:47.854 INFO checking udtrokia/tson against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 06:25:47.854 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/udtrokia/tson:/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 06:25:48.403 INFO [stdout] 644fc88a18e225289270a62113b145c93a7c9b2333e20121943534234611657c
Dec 19 06:25:48.405 INFO running `"docker" "start" "-a" "644fc88a18e225289270a62113b145c93a7c9b2333e20121943534234611657c"`
Dec 19 06:25:49.008 INFO [stderr]     Checking tson v0.1.0 (/opt/crater/workdir)
Dec 19 06:25:49.160 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 06:25:49.160 INFO [stderr]   --> main.rs:14:9
Dec 19 06:25:49.160 INFO [stderr]    |
Dec 19 06:25:49.160 INFO [stderr] 14 |         fout.write_all((new_line + "\n").as_bytes());
Dec 19 06:25:49.160 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 06:25:49.160 INFO [stderr]    |
Dec 19 06:25:49.160 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 06:25:49.160 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 06:25:49.160 INFO [stderr] 
Dec 19 06:25:49.160 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 06:25:49.160 INFO [stderr]   --> main.rs:16:5
Dec 19 06:25:49.160 INFO [stderr]    |
Dec 19 06:25:49.160 INFO [stderr] 16 |     fout.flush();
Dec 19 06:25:49.160 INFO [stderr]    |     ^^^^^^^^^^^^^
Dec 19 06:25:49.160 INFO [stderr]    |
Dec 19 06:25:49.160 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 06:25:49.160 INFO [stderr] 
Dec 19 06:25:49.204 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 06:25:49.204 INFO [stderr]   --> main.rs:14:9
Dec 19 06:25:49.204 INFO [stderr]    |
Dec 19 06:25:49.204 INFO [stderr] 14 |         fout.write_all((new_line + "\n").as_bytes());
Dec 19 06:25:49.204 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 06:25:49.204 INFO [stderr]    |
Dec 19 06:25:49.204 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 06:25:49.204 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 06:25:49.204 INFO [stderr] 
Dec 19 06:25:49.204 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 06:25:49.204 INFO [stderr]   --> main.rs:16:5
Dec 19 06:25:49.204 INFO [stderr]    |
Dec 19 06:25:49.204 INFO [stderr] 16 |     fout.flush();
Dec 19 06:25:49.204 INFO [stderr]    |     ^^^^^^^^^^^^^
Dec 19 06:25:49.204 INFO [stderr]    |
Dec 19 06:25:49.204 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 06:25:49.204 INFO [stderr] 
Dec 19 06:25:49.216 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.22s
Dec 19 06:25:49.524 INFO running `"docker" "inspect" "644fc88a18e225289270a62113b145c93a7c9b2333e20121943534234611657c"`
Dec 19 06:25:49.580 INFO running `"docker" "rm" "-f" "644fc88a18e225289270a62113b145c93a7c9b2333e20121943534234611657c"`
Dec 19 06:25:49.704 INFO [stdout] 644fc88a18e225289270a62113b145c93a7c9b2333e20121943534234611657c