[INFO] updating cached repository terakun/syntactic_monoid
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/terakun/syntactic_monoid
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/terakun/syntactic_monoid" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/terakun/syntactic_monoid"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/terakun/syntactic_monoid'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/terakun/syntactic_monoid" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/terakun/syntactic_monoid"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/terakun/syntactic_monoid'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 74a94df4aa27f5aa2492693dbd167f596e147fe0
[INFO] sha for GitHub repo terakun/syntactic_monoid: 74a94df4aa27f5aa2492693dbd167f596e147fe0
[INFO] validating manifest of terakun/syntactic_monoid on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of terakun/syntactic_monoid on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing terakun/syntactic_monoid
[INFO] finished frobbing terakun/syntactic_monoid
[INFO] frobbed toml for terakun/syntactic_monoid written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/terakun/syntactic_monoid/Cargo.toml
[INFO] started frobbing terakun/syntactic_monoid
[INFO] finished frobbing terakun/syntactic_monoid
[INFO] frobbed toml for terakun/syntactic_monoid written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/terakun/syntactic_monoid/Cargo.toml
[INFO] crate terakun/syntactic_monoid already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking terakun/syntactic_monoid against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-6/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/terakun/syntactic_monoid:/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" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] aca63f06e495567c4abb5cad385a844bc3ae8301ca1692df91eac5b1d0af0067
[INFO] running `"docker" "start" "-a" "aca63f06e495567c4abb5cad385a844bc3ae8301ca1692df91eac5b1d0af0067"`
[INFO] [stderr]     Checking syntactic_monoid v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `regex::RegularExpression`
[INFO] [stderr]  --> src/syntactic_monoid.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use regex::RegularExpression;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `regex::RegularExpression`
[INFO] [stderr]  --> src/syntactic_monoid.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use regex::RegularExpression;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Empty`
[INFO] [stderr]  --> src/regex.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     Empty,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Epsilon`
[INFO] [stderr]  --> src/regex.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     Epsilon,
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print_trans`
[INFO] [stderr]   --> src/nfa.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn print_trans(&self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_graphviz`
[INFO] [stderr]    --> src/nfa.rs:253:5
[INFO] [stderr]     |
[INFO] [stderr] 253 |     pub fn to_graphviz(&self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_trans`
[INFO] [stderr]   --> src/dfa.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn set_trans(&mut self, transition: &Vec<i32>) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_trans`
[INFO] [stderr]   --> src/dfa.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn add_trans(&mut self, id: i32, ch: usize) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print_trans`
[INFO] [stderr]   --> src/dfa.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn print_trans(&self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print_subset`
[INFO] [stderr]   --> src/dfa.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn print_subset(subset: &SubSet) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `accept`
[INFO] [stderr]    --> src/dfa.rs:227:5
[INFO] [stderr]     |
[INFO] [stderr] 227 |     pub fn accept(&self, input: &Vec<u8>) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `alphabets`
[INFO] [stderr]   --> src/syntactic_monoid.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     alphabets: BitSet,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Empty`
[INFO] [stderr]  --> src/regex.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     Empty,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Epsilon`
[INFO] [stderr]  --> src/regex.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     Epsilon,
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print_trans`
[INFO] [stderr]   --> src/nfa.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn print_trans(&self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_graphviz`
[INFO] [stderr]    --> src/nfa.rs:253:5
[INFO] [stderr]     |
[INFO] [stderr] 253 |     pub fn to_graphviz(&self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_trans`
[INFO] [stderr]   --> src/dfa.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn set_trans(&mut self, transition: &Vec<i32>) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_trans`
[INFO] [stderr]   --> src/dfa.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn add_trans(&mut self, id: i32, ch: usize) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print_trans`
[INFO] [stderr]   --> src/dfa.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn print_trans(&self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print_subset`
[INFO] [stderr]   --> src/dfa.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn print_subset(subset: &SubSet) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `accept`
[INFO] [stderr]    --> src/dfa.rs:227:5
[INFO] [stderr]     |
[INFO] [stderr] 227 |     pub fn accept(&self, input: &Vec<u8>) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `alphabets`
[INFO] [stderr]   --> src/syntactic_monoid.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     alphabets: BitSet,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `"docker" "inspect" "aca63f06e495567c4abb5cad385a844bc3ae8301ca1692df91eac5b1d0af0067"`
[INFO] running `"docker" "rm" "-f" "aca63f06e495567c4abb5cad385a844bc3ae8301ca1692df91eac5b1d0af0067"`
[INFO] [stdout] aca63f06e495567c4abb5cad385a844bc3ae8301ca1692df91eac5b1d0af0067