Dec 17 11:57:49.273 INFO checking whothey/firstfollow against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 11:57:49.273 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 11:57:49.700 INFO [stdout] 2c0f186665248253a2494651d218d3dae04bca8ad022fc74e2c16fe70fea755b
Dec 17 11:57:49.714 INFO running `"docker" "start" "-a" "2c0f186665248253a2494651d218d3dae04bca8ad022fc74e2c16fe70fea755b"`
Dec 17 11:57:50.961 INFO [stderr]     Checking libc v0.2.26
Dec 17 11:57:51.711 INFO [stderr]     Checking memchr v1.0.1
Dec 17 11:57:51.896 INFO [stderr]     Checking aho-corasick v0.6.3
Dec 17 11:57:52.334 INFO [stderr]     Checking regex v0.2.2
Dec 17 11:57:54.244 INFO [stderr]     Checking env_logger v0.4.3
Dec 17 11:57:54.473 INFO [stderr]     Checking firstfollow v0.1.0 (/opt/crater/workdir)
Dec 17 11:57:54.812 INFO [stderr] warning: method is never used: `is_terminal`
Dec 17 11:57:54.812 INFO [stderr]   --> src/formalgrammar/symbol.rs:10:5
Dec 17 11:57:54.812 INFO [stderr]    |
Dec 17 11:57:54.812 INFO [stderr] 10 |     pub fn is_terminal(&self) -> bool {
Dec 17 11:57:54.812 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 11:57:54.812 INFO [stderr] warning: method is never used: `is_terminal`
Dec 17 11:57:54.812 INFO [stderr]   --> src/formalgrammar/symbol.rs:10:5
Dec 17 11:57:54.812 INFO [stderr]    |
Dec 17 11:57:54.812 INFO [stderr] 10 |     pub fn is_terminal(&self) -> bool {
Dec 17 11:57:54.812 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 11:57:54.812 INFO [stderr]    |
Dec 17 11:57:54.812 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 11:57:54.812 INFO [stderr] 
Dec 17 11:57:54.812 INFO [stderr] warning: method is never used: `is_nonterminal`
Dec 17 11:57:54.812 INFO [stderr]   --> src/formalgrammar/symbol.rs:17:5
Dec 17 11:57:54.812 INFO [stderr]    |
Dec 17 11:57:54.812 INFO [stderr] 17 |     pub fn is_nonterminal(&self) -> bool {
Dec 17 11:57:54.812 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 11:57:54.812 INFO [stderr] 
Dec 17 11:57:54.813 INFO [stderr]    |
Dec 17 11:57:54.813 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 11:57:54.813 INFO [stderr] 
Dec 17 11:57:54.813 INFO [stderr] warning: method is never used: `is_nonterminal`
Dec 17 11:57:54.813 INFO [stderr]   --> src/formalgrammar/symbol.rs:17:5
Dec 17 11:57:54.813 INFO [stderr]    |
Dec 17 11:57:54.813 INFO [stderr] 17 |     pub fn is_nonterminal(&self) -> bool {
Dec 17 11:57:54.813 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 11:57:54.813 INFO [stderr] 
Dec 17 11:57:54.878 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.97s
Dec 17 11:57:55.598 INFO running `"docker" "inspect" "2c0f186665248253a2494651d218d3dae04bca8ad022fc74e2c16fe70fea755b"`
Dec 17 11:57:55.790 INFO running `"docker" "rm" "-f" "2c0f186665248253a2494651d218d3dae04bca8ad022fc74e2c16fe70fea755b"`
Dec 17 11:57:56.060 INFO [stdout] 2c0f186665248253a2494651d218d3dae04bca8ad022fc74e2c16fe70fea755b