[INFO] cloning repository https://github.com/yichaolemon/RegexParser
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yichaolemon/RegexParser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyichaolemon%2FRegexParser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyichaolemon%2FRegexParser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9a6bde9e2d3abfc4f79597353a1037b6e9c99c4a
[INFO] checking yichaolemon/RegexParser against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyichaolemon%2FRegexParser" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yichaolemon/RegexParser on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yichaolemon/RegexParser
[INFO] finished tweaking git repo https://github.com/yichaolemon/RegexParser
[INFO] tweaked toml for git repo https://github.com/yichaolemon/RegexParser written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/yichaolemon/RegexParser already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c0a769cc49b4bf1b4367556629820f8d6c06e337e839db0e8029489640f0fcae
[INFO] running `Command { std: "docker" "start" "-a" "c0a769cc49b4bf1b4367556629820f8d6c06e337e839db0e8029489640f0fcae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0a769cc49b4bf1b4367556629820f8d6c06e337e839db0e8029489640f0fcae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0a769cc49b4bf1b4367556629820f8d6c06e337e839db0e8029489640f0fcae", kill_on_drop: false }`
[INFO] [stdout] c0a769cc49b4bf1b4367556629820f8d6c06e337e839db0e8029489640f0fcae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 136a2e04db2dbf9707ec4e45473439a7059cd79118d9d443ff5531e9d31e1bd1
[INFO] running `Command { std: "docker" "start" "-a" "136a2e04db2dbf9707ec4e45473439a7059cd79118d9d443ff5531e9d31e1bd1", kill_on_drop: false }`
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]     Checking regex_parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `example` is never used
[INFO] [stdout]    --> src/graph.rs:120:6
[INFO] [stdout]     |
[INFO] [stdout] 119 | pub trait Transition {
[INFO] [stdout]     |           ---------- method in this trait
[INFO] [stdout] 120 |   fn example(&self, s: &String) -> String;
[INFO] [stdout]     |      ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `example` is never used
[INFO] [stdout]    --> src/graph.rs:124:10
[INFO] [stdout]     |
[INFO] [stdout] 123 | impl<T: Eq + Hash, U: Transition> Graph<T, U> {
[INFO] [stdout]     | --------------------------------------------- method in this implementation
[INFO] [stdout] 124 |   pub fn example(&self) -> Option<String> {
[INFO] [stdout]     |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `is_match` and `debug` are never read
[INFO] [stdout]    --> src/dfa.rs:233:3
[INFO] [stdout]     |
[INFO] [stdout] 232 | pub struct Match {
[INFO] [stdout]     |            ----- fields in this struct
[INFO] [stdout] 233 |   is_match: bool,
[INFO] [stdout]     |   ^^^^^^^^
[INFO] [stdout] 234 |   groups: HashMap<GroupId, String>,
[INFO] [stdout] 235 |   debug: String,
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Match` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print_to_file` is never used
[INFO] [stdout]    --> src/dfa.rs:246:6
[INFO] [stdout]     |
[INFO] [stdout] 244 | pub trait Matcher {
[INFO] [stdout]     |           ------- method in this trait
[INFO] [stdout] 245 |   fn match_string(&self, s: &str) -> Match;
[INFO] [stdout] 246 |   fn print_to_file(&self, f: &str);
[INFO] [stdout]     |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `example` is never used
[INFO] [stdout]    --> src/graph.rs:120:6
[INFO] [stdout]     |
[INFO] [stdout] 119 | pub trait Transition {
[INFO] [stdout]     |           ---------- method in this trait
[INFO] [stdout] 120 |   fn example(&self, s: &String) -> String;
[INFO] [stdout]     |      ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `example` is never used
[INFO] [stdout]    --> src/graph.rs:124:10
[INFO] [stdout]     |
[INFO] [stdout] 123 | impl<T: Eq + Hash, U: Transition> Graph<T, U> {
[INFO] [stdout]     | --------------------------------------------- method in this implementation
[INFO] [stdout] 124 |   pub fn example(&self) -> Option<String> {
[INFO] [stdout]     |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `debug` is never read
[INFO] [stdout]    --> src/dfa.rs:235:3
[INFO] [stdout]     |
[INFO] [stdout] 232 | pub struct Match {
[INFO] [stdout]     |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 235 |   debug: String,
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Match` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "136a2e04db2dbf9707ec4e45473439a7059cd79118d9d443ff5531e9d31e1bd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "136a2e04db2dbf9707ec4e45473439a7059cd79118d9d443ff5531e9d31e1bd1", kill_on_drop: false }`
[INFO] [stdout] 136a2e04db2dbf9707ec4e45473439a7059cd79118d9d443ff5531e9d31e1bd1