Dec 19 19:36:19.305 INFO checking brain-lang/brain against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 19:36:19.305 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/brain-lang/brain:/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 19:36:19.768 INFO [stdout] 952f549613ca2c9326b0bfd92daa8ca8a69d64fd957e6d0fd5903f1c6c39d440
Dec 19 19:36:19.770 INFO running `"docker" "start" "-a" "952f549613ca2c9326b0bfd92daa8ca8a69d64fd957e6d0fd5903f1c6c39d440"`
Dec 19 19:36:21.571 INFO [stderr]     Checking clap v2.24.2
Dec 19 19:36:27.153 INFO [stderr]     Checking brain v0.1.2 (/opt/crater/workdir)
Dec 19 19:36:27.824 INFO [stderr] warning: doc comment not used by rustdoc
Dec 19 19:36:27.825 INFO [stderr]    --> src/core/primitives/boolean.rs:212:17
Dec 19 19:36:27.825 INFO [stderr]     |
Dec 19 19:36:27.825 INFO [stderr] 212 |                 /// Thanks to certain properties of booleans, we can evaluate certain things during
Dec 19 19:36:27.825 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:36:27.826 INFO [stderr]     |
Dec 19 19:36:27.826 INFO [stderr]     = note: #[warn(unused_doc_comments)] on by default
Dec 19 19:36:27.826 INFO [stderr] 
Dec 19 19:36:27.826 INFO [stderr] warning: doc comment not used by rustdoc
Dec 19 19:36:27.827 INFO [stderr]    --> src/core/primitives/boolean.rs:359:17
Dec 19 19:36:27.827 INFO [stderr]     |
Dec 19 19:36:27.827 INFO [stderr] 359 |                 /// Thanks to certain properties of booleans, we can evaluate certain things during
Dec 19 19:36:27.828 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:36:27.828 INFO [stderr] 
Dec 19 19:36:27.828 INFO [stderr] warning: doc comment not used by rustdoc
Dec 19 19:36:27.828 INFO [stderr]    --> src/core/primitives/boolean.rs:513:17
Dec 19 19:36:27.828 INFO [stderr]     |
Dec 19 19:36:27.829 INFO [stderr] 513 |                 /// Thanks to certain properties of booleans, we can evaluate certain things during
Dec 19 19:36:27.829 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:36:27.829 INFO [stderr] 
Dec 19 19:36:27.829 INFO [stderr] warning: doc comment not used by rustdoc
Dec 19 19:36:27.830 INFO [stderr]    --> src/core/primitives/boolean.rs:641:17
Dec 19 19:36:27.830 INFO [stderr]     |
Dec 19 19:36:27.830 INFO [stderr] 641 |                 /// Thanks to certain properties of booleans, we can evaluate certain things during
Dec 19 19:36:27.830 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:36:27.830 INFO [stderr] 
Dec 19 19:36:27.908 INFO [stderr] warning: doc comment not used by rustdoc
Dec 19 19:36:27.908 INFO [stderr]    --> src/core/primitives/boolean.rs:212:17
Dec 19 19:36:27.908 INFO [stderr]     |
Dec 19 19:36:27.909 INFO [stderr] 212 |                 /// Thanks to certain properties of booleans, we can evaluate certain things during
Dec 19 19:36:27.909 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:36:27.909 INFO [stderr]     |
Dec 19 19:36:27.909 INFO [stderr]     = note: #[warn(unused_doc_comments)] on by default
Dec 19 19:36:27.910 INFO [stderr] 
Dec 19 19:36:27.910 INFO [stderr] warning: doc comment not used by rustdoc
Dec 19 19:36:27.910 INFO [stderr]    --> src/core/primitives/boolean.rs:359:17
Dec 19 19:36:27.911 INFO [stderr]     |
Dec 19 19:36:27.911 INFO [stderr] 359 |                 /// Thanks to certain properties of booleans, we can evaluate certain things during
Dec 19 19:36:27.911 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:36:27.911 INFO [stderr] 
Dec 19 19:36:27.912 INFO [stderr] warning: doc comment not used by rustdoc
Dec 19 19:36:27.912 INFO [stderr]    --> src/core/primitives/boolean.rs:513:17
Dec 19 19:36:27.912 INFO [stderr]     |
Dec 19 19:36:27.913 INFO [stderr] 513 |                 /// Thanks to certain properties of booleans, we can evaluate certain things during
Dec 19 19:36:27.913 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:36:27.913 INFO [stderr] 
Dec 19 19:36:27.914 INFO [stderr] warning: doc comment not used by rustdoc
Dec 19 19:36:27.914 INFO [stderr]    --> src/core/primitives/boolean.rs:641:17
Dec 19 19:36:27.914 INFO [stderr]     |
Dec 19 19:36:27.915 INFO [stderr] 641 |                 /// Thanks to certain properties of booleans, we can evaluate certain things during
Dec 19 19:36:27.915 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:36:27.915 INFO [stderr] 
Dec 19 19:36:30.333 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.81s
Dec 19 19:36:30.688 INFO running `"docker" "inspect" "952f549613ca2c9326b0bfd92daa8ca8a69d64fd957e6d0fd5903f1c6c39d440"`
Dec 19 19:36:30.814 INFO running `"docker" "rm" "-f" "952f549613ca2c9326b0bfd92daa8ca8a69d64fd957e6d0fd5903f1c6c39d440"`
Dec 19 19:36:30.956 INFO [stdout] 952f549613ca2c9326b0bfd92daa8ca8a69d64fd957e6d0fd5903f1c6c39d440