Dec 19 17:54:20.239 INFO checking dlukes/simplify-tags against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 17:54:20.239 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/dlukes/simplify-tags:/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 17:54:20.665 INFO [stdout] 9dd2af71fd306a4f6c2038ac45105534245fb728d398dfe3ac45a5607747a917
Dec 19 17:54:20.667 INFO running `"docker" "start" "-a" "9dd2af71fd306a4f6c2038ac45105534245fb728d398dfe3ac45a5607747a917"`
Dec 19 17:54:22.773 INFO [stderr]     Checking regex v0.2.10
Dec 19 17:54:24.773 INFO [stderr]     Checking simplify_tags v0.1.0 (/opt/crater/workdir)
Dec 19 17:54:25.626 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:25.626 INFO [stderr]   --> src/bin/04-vetveni.rs:81:5
Dec 19 17:54:25.626 INFO [stderr]    |
Dec 19 17:54:25.626 INFO [stderr] 81 |     stdout.flush();
Dec 19 17:54:25.626 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:25.626 INFO [stderr]    |
Dec 19 17:54:25.626 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:25.626 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:25.674 INFO [stderr] 
Dec 19 17:54:25.996 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:25.996 INFO [stderr]   --> src/bin/01-drobnosti.rs:28:5
Dec 19 17:54:25.996 INFO [stderr]    |
Dec 19 17:54:25.996 INFO [stderr] 28 |     stdout.flush();
Dec 19 17:54:25.996 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:25.996 INFO [stderr]    |
Dec 19 17:54:25.996 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:25.996 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:25.996 INFO [stderr] 
Dec 19 17:54:26.164 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:26.165 INFO [stderr]   --> src/bin/06-bez_parsovani_utf8.rs:78:5
Dec 19 17:54:26.165 INFO [stderr]    |
Dec 19 17:54:26.165 INFO [stderr] 78 |     stdout.flush();
Dec 19 17:54:26.166 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:26.166 INFO [stderr]    |
Dec 19 17:54:26.166 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:26.166 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:26.166 INFO [stderr] 
Dec 19 17:54:26.244 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:26.245 INFO [stderr]   --> src/bin/03-jen_main.rs:56:5
Dec 19 17:54:26.245 INFO [stderr]    |
Dec 19 17:54:26.248 INFO [stderr] 56 |     stdout.flush();
Dec 19 17:54:26.248 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:26.262 INFO [stderr]    |
Dec 19 17:54:26.263 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:26.264 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:26.264 INFO [stderr] 
Dec 19 17:54:26.323 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:26.323 INFO [stderr]   --> src/bin/06-bez_parsovani_utf8.rs:78:5
Dec 19 17:54:26.323 INFO [stderr]    |
Dec 19 17:54:26.323 INFO [stderr] 78 |     stdout.flush();
Dec 19 17:54:26.323 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:26.323 INFO [stderr]    |
Dec 19 17:54:26.323 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:26.323 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:26.323 INFO [stderr] 
Dec 19 17:54:26.383 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:26.383 INFO [stderr]   --> src/bin/04-vetveni.rs:81:5
Dec 19 17:54:26.383 INFO [stderr]    |
Dec 19 17:54:26.383 INFO [stderr] 81 |     stdout.flush();
Dec 19 17:54:26.383 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:26.383 INFO [stderr]    |
Dec 19 17:54:26.383 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:26.383 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:26.383 INFO [stderr] 
Dec 19 17:54:26.827 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:26.827 INFO [stderr]    --> src/bin/05-vetveni_bez_zbytecnych_alokaci.rs:102:5
Dec 19 17:54:26.827 INFO [stderr]     |
Dec 19 17:54:26.827 INFO [stderr] 102 |     stdout.flush();
Dec 19 17:54:26.827 INFO [stderr]     |     ^^^^^^^^^^^^^^^
Dec 19 17:54:26.827 INFO [stderr]     |
Dec 19 17:54:26.827 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:26.827 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:26.827 INFO [stderr] 
Dec 19 17:54:26.950 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:26.950 INFO [stderr]   --> src/bin/01-drobnosti.rs:28:5
Dec 19 17:54:26.950 INFO [stderr]    |
Dec 19 17:54:26.950 INFO [stderr] 28 |     stdout.flush();
Dec 19 17:54:26.950 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:26.950 INFO [stderr]    |
Dec 19 17:54:26.950 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:26.950 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:26.950 INFO [stderr] 
Dec 19 17:54:27.108 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:27.108 INFO [stderr]    --> src/bin/05-vetveni_bez_zbytecnych_alokaci.rs:102:5
Dec 19 17:54:27.108 INFO [stderr]     |
Dec 19 17:54:27.108 INFO [stderr] 102 |     stdout.flush();
Dec 19 17:54:27.108 INFO [stderr]     |     ^^^^^^^^^^^^^^^
Dec 19 17:54:27.108 INFO [stderr]     |
Dec 19 17:54:27.108 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:27.108 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:27.108 INFO [stderr] 
Dec 19 17:54:27.343 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:27.344 INFO [stderr]   --> src/bin/02-min_alokaci.rs:28:5
Dec 19 17:54:27.344 INFO [stderr]    |
Dec 19 17:54:27.344 INFO [stderr] 28 |     stdout.flush();
Dec 19 17:54:27.344 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:27.344 INFO [stderr]    |
Dec 19 17:54:27.344 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:27.344 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:27.344 INFO [stderr] 
Dec 19 17:54:27.353 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:27.353 INFO [stderr]   --> src/bin/03-jen_main.rs:56:5
Dec 19 17:54:27.353 INFO [stderr]    |
Dec 19 17:54:27.353 INFO [stderr] 56 |     stdout.flush();
Dec 19 17:54:27.353 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:27.353 INFO [stderr]    |
Dec 19 17:54:27.353 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:27.353 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:27.353 INFO [stderr] 
Dec 19 17:54:27.362 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:27.362 INFO [stderr]   --> src/bin/02-min_alokaci.rs:28:5
Dec 19 17:54:27.363 INFO [stderr]    |
Dec 19 17:54:27.363 INFO [stderr] 28 |     stdout.flush();
Dec 19 17:54:27.363 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:27.363 INFO [stderr]    |
Dec 19 17:54:27.363 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:27.363 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:27.363 INFO [stderr] 
Dec 19 17:54:27.399 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.66s
Dec 19 17:54:27.936 INFO running `"docker" "inspect" "9dd2af71fd306a4f6c2038ac45105534245fb728d398dfe3ac45a5607747a917"`
Dec 19 17:54:28.244 INFO running `"docker" "rm" "-f" "9dd2af71fd306a4f6c2038ac45105534245fb728d398dfe3ac45a5607747a917"`
Dec 19 17:54:28.564 INFO [stdout] 9dd2af71fd306a4f6c2038ac45105534245fb728d398dfe3ac45a5607747a917