Dec 17 12:52:08.955 INFO checking udtrokia/tson against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 12:52:08.955 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 12:52:09.107 INFO [stdout] 505aecde341e26e3285d79c1617ee0c72c5a4e83b56f95ebf017648bd2b4f808
Dec 17 12:52:09.113 INFO running `"docker" "start" "-a" "505aecde341e26e3285d79c1617ee0c72c5a4e83b56f95ebf017648bd2b4f808"`
Dec 17 12:52:09.719 INFO [stderr]     Checking tson v0.1.0 (/opt/crater/workdir)
Dec 17 12:52:09.840 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 12:52:09.840 INFO [stderr]   --> main.rs:14:9
Dec 17 12:52:09.840 INFO [stderr]    |
Dec 17 12:52:09.840 INFO [stderr] 14 |         fout.write_all((new_line + "\n").as_bytes());
Dec 17 12:52:09.840 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 12:52:09.840 INFO [stderr]    |
Dec 17 12:52:09.840 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 12:52:09.840 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 12:52:09.840 INFO [stderr] 
Dec 17 12:52:09.840 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 12:52:09.840 INFO [stderr]   --> main.rs:16:5
Dec 17 12:52:09.840 INFO [stderr]    |
Dec 17 12:52:09.840 INFO [stderr] 16 |     fout.flush();
Dec 17 12:52:09.840 INFO [stderr]    |     ^^^^^^^^^^^^^
Dec 17 12:52:09.840 INFO [stderr]    |
Dec 17 12:52:09.840 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 12:52:09.840 INFO [stderr] 
Dec 17 12:52:09.851 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 12:52:09.851 INFO [stderr]   --> main.rs:14:9
Dec 17 12:52:09.851 INFO [stderr]    |
Dec 17 12:52:09.851 INFO [stderr] 14 |         fout.write_all((new_line + "\n").as_bytes());
Dec 17 12:52:09.851 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 12:52:09.851 INFO [stderr]    |
Dec 17 12:52:09.851 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 12:52:09.851 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 12:52:09.851 INFO [stderr] 
Dec 17 12:52:09.851 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 12:52:09.851 INFO [stderr]   --> main.rs:16:5
Dec 17 12:52:09.851 INFO [stderr]    |
Dec 17 12:52:09.851 INFO [stderr] 16 |     fout.flush();
Dec 17 12:52:09.851 INFO [stderr]    |     ^^^^^^^^^^^^^
Dec 17 12:52:09.851 INFO [stderr]    |
Dec 17 12:52:09.851 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 12:52:09.851 INFO [stderr] 
Dec 17 12:52:09.872 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.16s
Dec 17 12:52:10.738 INFO running `"docker" "inspect" "505aecde341e26e3285d79c1617ee0c72c5a4e83b56f95ebf017648bd2b4f808"`
Dec 17 12:52:10.914 INFO running `"docker" "rm" "-f" "505aecde341e26e3285d79c1617ee0c72c5a4e83b56f95ebf017648bd2b4f808"`
Dec 17 12:52:11.069 INFO [stdout] 505aecde341e26e3285d79c1617ee0c72c5a4e83b56f95ebf017648bd2b4f808