Dec 19 05:33:08.531 INFO checking whothey/firstfollow against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 05:33:08.531 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/whothey/firstfollow:/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 05:33:09.085 INFO [stdout] abc84b998add6c98f38ed4f9f549d96529774cce3140baab11ac3d0181e9ece8
Dec 19 05:33:09.087 INFO running `"docker" "start" "-a" "abc84b998add6c98f38ed4f9f549d96529774cce3140baab11ac3d0181e9ece8"`
Dec 19 05:33:11.108 INFO [stderr]     Checking libc v0.2.26
Dec 19 05:33:11.121 INFO [stderr]     Checking thread_local v0.3.4
Dec 19 05:33:12.153 INFO [stderr]     Checking memchr v1.0.1
Dec 19 05:33:12.406 INFO [stderr]     Checking aho-corasick v0.6.3
Dec 19 05:33:13.008 INFO [stderr]     Checking regex v0.2.2
Dec 19 05:33:15.007 INFO [stderr]     Checking env_logger v0.4.3
Dec 19 05:33:15.308 INFO [stderr]     Checking firstfollow v0.1.0 (/opt/crater/workdir)
Dec 19 05:33:15.731 INFO [stderr] warning: method is never used: `is_terminal`
Dec 19 05:33:15.731 INFO [stderr]   --> src/formalgrammar/symbol.rs:10:5
Dec 19 05:33:15.731 INFO [stderr]    |
Dec 19 05:33:15.731 INFO [stderr] 10 |     pub fn is_terminal(&self) -> bool {
Dec 19 05:33:15.731 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:33:15.731 INFO [stderr]    |
Dec 19 05:33:15.731 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 05:33:15.731 INFO [stderr] 
Dec 19 05:33:15.731 INFO [stderr] warning: method is never used: `is_nonterminal`
Dec 19 05:33:15.731 INFO [stderr]   --> src/formalgrammar/symbol.rs:17:5
Dec 19 05:33:15.731 INFO [stderr]    |
Dec 19 05:33:15.731 INFO [stderr] 17 |     pub fn is_nonterminal(&self) -> bool {
Dec 19 05:33:15.731 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:33:15.731 INFO [stderr] 
Dec 19 05:33:15.833 INFO [stderr] warning: method is never used: `is_terminal`
Dec 19 05:33:15.833 INFO [stderr]   --> src/formalgrammar/symbol.rs:10:5
Dec 19 05:33:15.833 INFO [stderr]    |
Dec 19 05:33:15.833 INFO [stderr] 10 |     pub fn is_terminal(&self) -> bool {
Dec 19 05:33:15.833 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:33:15.833 INFO [stderr]    |
Dec 19 05:33:15.834 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 05:33:15.834 INFO [stderr] 
Dec 19 05:33:15.834 INFO [stderr] warning: method is never used: `is_nonterminal`
Dec 19 05:33:15.834 INFO [stderr]   --> src/formalgrammar/symbol.rs:17:5
Dec 19 05:33:15.834 INFO [stderr]    |
Dec 19 05:33:15.834 INFO [stderr] 17 |     pub fn is_nonterminal(&self) -> bool {
Dec 19 05:33:15.834 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:33:15.834 INFO [stderr] 
Dec 19 05:33:15.896 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.85s
Dec 19 05:33:16.744 INFO running `"docker" "inspect" "abc84b998add6c98f38ed4f9f549d96529774cce3140baab11ac3d0181e9ece8"`
Dec 19 05:33:17.058 INFO running `"docker" "rm" "-f" "abc84b998add6c98f38ed4f9f549d96529774cce3140baab11ac3d0181e9ece8"`
Dec 19 05:33:17.436 INFO [stdout] abc84b998add6c98f38ed4f9f549d96529774cce3140baab11ac3d0181e9ece8