Dec 19 17:54:23.338 INFO checking dlukes/simplify-tags against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 17:54:23.338 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-6/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 17:54:23.668 INFO [stdout] ed32584b36fe3cf63002a3ebfd04b092ef023eff6472583479c85cae675d31c5
Dec 19 17:54:23.670 INFO running `"docker" "start" "-a" "ed32584b36fe3cf63002a3ebfd04b092ef023eff6472583479c85cae675d31c5"`
Dec 19 17:54:25.749 INFO [stderr]     Checking regex v0.2.10
Dec 19 17:54:27.960 INFO [stderr]     Checking simplify_tags v0.1.0 (/opt/crater/workdir)
Dec 19 17:54:29.037 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:29.037 INFO [stderr]   --> src/bin/04-vetveni.rs:81:5
Dec 19 17:54:29.037 INFO [stderr]    |
Dec 19 17:54:29.037 INFO [stderr] 81 |     stdout.flush();
Dec 19 17:54:29.037 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:29.037 INFO [stderr]    |
Dec 19 17:54:29.037 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:29.037 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:29.038 INFO [stderr] 
Dec 19 17:54:29.492 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:29.492 INFO [stderr]   --> src/bin/06-bez_parsovani_utf8.rs:78:5
Dec 19 17:54:29.492 INFO [stderr]    |
Dec 19 17:54:29.492 INFO [stderr] 78 |     stdout.flush();
Dec 19 17:54:29.492 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:29.492 INFO [stderr]    |
Dec 19 17:54:29.492 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:29.492 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:29.492 INFO [stderr] 
Dec 19 17:54:29.508 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:29.508 INFO [stderr]   --> src/bin/03-jen_main.rs:56:5
Dec 19 17:54:29.508 INFO [stderr]    |
Dec 19 17:54:29.508 INFO [stderr] 56 |     stdout.flush();
Dec 19 17:54:29.508 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:29.528 INFO [stderr]    |
Dec 19 17:54:29.528 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:29.528 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:29.528 INFO [stderr] 
Dec 19 17:54:30.036 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:30.036 INFO [stderr]   --> src/bin/01-drobnosti.rs:28:5
Dec 19 17:54:30.036 INFO [stderr]    |
Dec 19 17:54:30.036 INFO [stderr] 28 |     stdout.flush();
Dec 19 17:54:30.036 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:30.036 INFO [stderr]    |
Dec 19 17:54:30.037 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:30.037 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:30.037 INFO [stderr] 
Dec 19 17:54:30.336 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:30.336 INFO [stderr]   --> src/bin/01-drobnosti.rs:28:5
Dec 19 17:54:30.336 INFO [stderr]    |
Dec 19 17:54:30.336 INFO [stderr] 28 |     stdout.flush();
Dec 19 17:54:30.336 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:30.336 INFO [stderr]    |
Dec 19 17:54:30.336 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:30.336 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:30.336 INFO [stderr] 
Dec 19 17:54:30.407 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:30.407 INFO [stderr]   --> src/bin/02-min_alokaci.rs:28:5
Dec 19 17:54:30.408 INFO [stderr]    |
Dec 19 17:54:30.408 INFO [stderr] 28 |     stdout.flush();
Dec 19 17:54:30.408 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:30.408 INFO [stderr]    |
Dec 19 17:54:30.408 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:30.408 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:30.408 INFO [stderr] 
Dec 19 17:54:30.552 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:30.552 INFO [stderr]    --> src/bin/05-vetveni_bez_zbytecnych_alokaci.rs:102:5
Dec 19 17:54:30.552 INFO [stderr]     |
Dec 19 17:54:30.552 INFO [stderr] 102 |     stdout.flush();
Dec 19 17:54:30.552 INFO [stderr]     |     ^^^^^^^^^^^^^^^
Dec 19 17:54:30.552 INFO [stderr]     |
Dec 19 17:54:30.552 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:30.552 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:30.552 INFO [stderr] 
Dec 19 17:54:30.835 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:30.835 INFO [stderr]    --> src/bin/05-vetveni_bez_zbytecnych_alokaci.rs:102:5
Dec 19 17:54:30.835 INFO [stderr]     |
Dec 19 17:54:30.835 INFO [stderr] 102 |     stdout.flush();
Dec 19 17:54:30.835 INFO [stderr]     |     ^^^^^^^^^^^^^^^
Dec 19 17:54:30.835 INFO [stderr]     |
Dec 19 17:54:30.835 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:30.835 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:30.835 INFO [stderr] 
Dec 19 17:54:31.038 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:31.038 INFO [stderr]   --> src/bin/06-bez_parsovani_utf8.rs:78:5
Dec 19 17:54:31.038 INFO [stderr]    |
Dec 19 17:54:31.038 INFO [stderr] 78 |     stdout.flush();
Dec 19 17:54:31.038 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:31.038 INFO [stderr]    |
Dec 19 17:54:31.038 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:31.038 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:31.038 INFO [stderr] 
Dec 19 17:54:31.220 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:31.226 INFO [stderr]   --> src/bin/04-vetveni.rs:81:5
Dec 19 17:54:31.226 INFO [stderr]    |
Dec 19 17:54:31.226 INFO [stderr] 81 |     stdout.flush();
Dec 19 17:54:31.226 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:31.226 INFO [stderr]    |
Dec 19 17:54:31.226 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:31.226 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:31.226 INFO [stderr] 
Dec 19 17:54:31.226 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:31.226 INFO [stderr]   --> src/bin/03-jen_main.rs:56:5
Dec 19 17:54:31.226 INFO [stderr]    |
Dec 19 17:54:31.226 INFO [stderr] 56 |     stdout.flush();
Dec 19 17:54:31.226 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:31.226 INFO [stderr]    |
Dec 19 17:54:31.226 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:31.226 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:31.226 INFO [stderr] 
Dec 19 17:54:31.286 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:54:31.286 INFO [stderr]   --> src/bin/02-min_alokaci.rs:28:5
Dec 19 17:54:31.286 INFO [stderr]    |
Dec 19 17:54:31.286 INFO [stderr] 28 |     stdout.flush();
Dec 19 17:54:31.286 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 17:54:31.286 INFO [stderr]    |
Dec 19 17:54:31.286 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:54:31.286 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:54:31.286 INFO [stderr] 
Dec 19 17:54:31.343 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.67s
Dec 19 17:54:32.589 INFO running `"docker" "inspect" "ed32584b36fe3cf63002a3ebfd04b092ef023eff6472583479c85cae675d31c5"`
Dec 19 17:54:32.860 INFO running `"docker" "rm" "-f" "ed32584b36fe3cf63002a3ebfd04b092ef023eff6472583479c85cae675d31c5"`
Dec 19 17:54:33.080 INFO [stdout] ed32584b36fe3cf63002a3ebfd04b092ef023eff6472583479c85cae675d31c5