Dec 17 11:57:39.344 INFO checking whothey/firstfollow against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 11:57:39.344 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 11:57:39.779 INFO [stdout] 1ef19ac08565bc2b97946805bbf2c3ff3686a10d91d4e47ee8bc0947e02a7cbd
Dec 17 11:57:39.781 INFO running `"docker" "start" "-a" "1ef19ac08565bc2b97946805bbf2c3ff3686a10d91d4e47ee8bc0947e02a7cbd"`
Dec 17 11:57:42.402 INFO [stderr]     Checking libc v0.2.26
Dec 17 11:57:42.416 INFO [stderr]     Checking thread_local v0.3.4
Dec 17 11:57:43.327 INFO [stderr]     Checking memchr v1.0.1
Dec 17 11:57:43.544 INFO [stderr]     Checking aho-corasick v0.6.3
Dec 17 11:57:44.158 INFO [stderr]     Checking regex v0.2.2
Dec 17 11:57:46.099 INFO [stderr]     Checking env_logger v0.4.3
Dec 17 11:57:46.397 INFO [stderr]     Checking firstfollow v0.1.0 (/opt/crater/workdir)
Dec 17 11:57:46.904 INFO [stderr] warning: method is never used: `is_terminal`
Dec 17 11:57:46.905 INFO [stderr]   --> src/formalgrammar/symbol.rs:10:5
Dec 17 11:57:46.905 INFO [stderr]    |
Dec 17 11:57:46.906 INFO [stderr] 10 |     pub fn is_terminal(&self) -> bool {
Dec 17 11:57:46.906 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 11:57:46.906 INFO [stderr]    |
Dec 17 11:57:46.906 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 11:57:46.906 INFO [stderr] 
Dec 17 11:57:46.906 INFO [stderr] warning: method is never used: `is_nonterminal`
Dec 17 11:57:46.906 INFO [stderr]   --> src/formalgrammar/symbol.rs:17:5
Dec 17 11:57:46.906 INFO [stderr]    |
Dec 17 11:57:46.906 INFO [stderr] 17 |     pub fn is_nonterminal(&self) -> bool {
Dec 17 11:57:46.906 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 11:57:46.907 INFO [stderr] 
Dec 17 11:57:47.043 INFO [stderr] warning: method is never used: `is_terminal`
Dec 17 11:57:47.043 INFO [stderr]   --> src/formalgrammar/symbol.rs:10:5
Dec 17 11:57:47.043 INFO [stderr]    |
Dec 17 11:57:47.043 INFO [stderr] 10 |     pub fn is_terminal(&self) -> bool {
Dec 17 11:57:47.043 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 11:57:47.043 INFO [stderr]    |
Dec 17 11:57:47.043 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 11:57:47.043 INFO [stderr] 
Dec 17 11:57:47.044 INFO [stderr] warning: method is never used: `is_nonterminal`
Dec 17 11:57:47.044 INFO [stderr]   --> src/formalgrammar/symbol.rs:17:5
Dec 17 11:57:47.044 INFO [stderr]    |
Dec 17 11:57:47.045 INFO [stderr] 17 |     pub fn is_nonterminal(&self) -> bool {
Dec 17 11:57:47.045 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 11:57:47.045 INFO [stderr] 
Dec 17 11:57:47.078 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.73s
Dec 17 11:57:48.692 INFO running `"docker" "inspect" "1ef19ac08565bc2b97946805bbf2c3ff3686a10d91d4e47ee8bc0947e02a7cbd"`
Dec 17 11:57:48.916 INFO running `"docker" "rm" "-f" "1ef19ac08565bc2b97946805bbf2c3ff3686a10d91d4e47ee8bc0947e02a7cbd"`
Dec 17 11:57:49.198 INFO [stdout] 1ef19ac08565bc2b97946805bbf2c3ff3686a10d91d4e47ee8bc0947e02a7cbd