[INFO] cloning repository https://github.com/NicoBliss/regex-engine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/NicoBliss/regex-engine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNicoBliss%2Fregex-engine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNicoBliss%2Fregex-engine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e8d5f299d0e1fde0d715f4b4fac79370e2263a5b
[INFO] checking NicoBliss/regex-engine against try#6619027b13a87a3597115f2c8231f107bf3a7a5f for pr-139624
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNicoBliss%2Fregex-engine" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NicoBliss/regex-engine on toolchain 6619027b13a87a3597115f2c8231f107bf3a7a5f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6619027b13a87a3597115f2c8231f107bf3a7a5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/NicoBliss/regex-engine
[INFO] finished tweaking git repo https://github.com/NicoBliss/regex-engine
[INFO] tweaked toml for git repo https://github.com/NicoBliss/regex-engine written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/NicoBliss/regex-engine 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" "+6619027b13a87a3597115f2c8231f107bf3a7a5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+6619027b13a87a3597115f2c8231f107bf3a7a5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3e6c57129653572abac6f27e8c78e5dbfd3b3591865e4594b84c2d3d5ac04215
[INFO] running `Command { std: "docker" "start" "-a" "3e6c57129653572abac6f27e8c78e5dbfd3b3591865e4594b84c2d3d5ac04215", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e6c57129653572abac6f27e8c78e5dbfd3b3591865e4594b84c2d3d5ac04215", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e6c57129653572abac6f27e8c78e5dbfd3b3591865e4594b84c2d3d5ac04215", kill_on_drop: false }`
[INFO] [stdout] 3e6c57129653572abac6f27e8c78e5dbfd3b3591865e4594b84c2d3d5ac04215
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+6619027b13a87a3597115f2c8231f107bf3a7a5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3450ad9e2c20f35433f3350c9aa9f581a5f32a28d3fbaf9c400b440f07cfaed1
[INFO] running `Command { std: "docker" "start" "-a" "3450ad9e2c20f35433f3350c9aa9f581a5f32a28d3fbaf9c400b440f07cfaed1", kill_on_drop: false }`
[INFO] [stderr]     Checking regex v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `NodeIndex`
[INFO] [stdout]  --> src/automata.rs:2:38
[INFO] [stdout]   |
[INFO] [stdout] 2 |     use crate::graph::graph::{Graph, NodeIndex};
[INFO] [stdout]   |                                      ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `CharClass`
[INFO] [stdout]  --> src/automata.rs:3:33
[INFO] [stdout]   |
[INFO] [stdout] 3 |     use crate::parser::parser::{CharClass, CharCost};
[INFO] [stdout]   |                                 ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `NodeIndex`
[INFO] [stdout]  --> src/automata.rs:2:38
[INFO] [stdout]   |
[INFO] [stdout] 2 |     use crate::graph::graph::{Graph, NodeIndex};
[INFO] [stdout]   |                                      ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `CharClass`
[INFO] [stdout]  --> src/automata.rs:3:33
[INFO] [stdout]   |
[INFO] [stdout] 3 |     use crate::parser::parser::{CharClass, CharCost};
[INFO] [stdout]   |                                 ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `char`
[INFO] [stdout]    --> src/parser.rs:205:34
[INFO] [stdout]     |
[INFO] [stdout] 205 |                 (Lexeme::Builtin(char), ParserState::QualWithoutClass(_)) | (Lexeme::Builtin(char), ParserState::OutOfClassWithoutQual) => {
[INFO] [stdout]     |                                  ^^^^                                                        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 205 |                 (Lexeme::Builtin(_char), ParserState::QualWithoutClass(_)) | (Lexeme::Builtin(_char), ParserState::OutOfClassWithoutQual) => {
[INFO] [stdout]     |                                  +                                                            +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `automata`
[INFO] [stdout]   --> src/automata.rs:10:21
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn run_automata(automata: Graph<CharCost>, code: String) -> Vec<MatchData> {
[INFO] [stdout]    |                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_automata`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `code`
[INFO] [stdout]   --> src/automata.rs:10:48
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn run_automata(automata: Graph<CharCost>, code: String) -> Vec<MatchData> {
[INFO] [stdout]    |                                                ^^^^ help: if this is intentional, prefix it with an underscore: `_code`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/graph.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     impl<T> Node<T> {
[INFO] [stdout]    |     --------------- associated function in this implementation
[INFO] [stdout] 18 |         fn new(edges: Vec<(NodeIndex, Option<T>)>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/graph.rs:28:12
[INFO] [stdout]     |
[INFO] [stdout] 26  |     impl<T> Graph<T> {
[INFO] [stdout]     |     ---------------- associated items in this implementation
[INFO] [stdout] 27  |         // ensures "monotonicity" of node numbers
[INFO] [stdout] 28  |         fn add_node(&mut self, node: Node<T>) -> NodeIndex {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 34  |         pub fn new() -> Self {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 46  |         fn set_active(&mut self, new_active: NodeIndex) {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51  |         fn bump_endlinked(&mut self, endlinked: NodeIndex, new: NodeIndex, cost: Option<T>) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61  |         pub fn add_cost(&mut self, cost: T) {
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69  |         pub fn add_junction(&mut self, start: NodeIndex) {
[INFO] [stdout]     |                ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 77  |         pub fn close_junction(&mut self, start: NodeIndex) {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 102 |         pub fn zero_or_one(&mut self, start: NodeIndex) {
[INFO] [stdout]     |                ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 107 |         pub fn one_or_more(&mut self, start: NodeIndex) {
[INFO] [stdout]     |                ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 |         pub fn zero_or_more(&mut self, start: NodeIndex) {
[INFO] [stdout]     |                ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 |         pub fn compile(self) -> Self {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Singleton`, `Dot`, and `Class` are never constructed
[INFO] [stdout]   --> src/parser.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub enum CharCost {
[INFO] [stdout]    |              -------- variants in this enum
[INFO] [stdout] 14 |         Singleton(char),
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 15 |         Dot,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 16 |         Class(CharClass)
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CharCost` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Lexeme` is never used
[INFO] [stdout]   --> src/parser.rs:20:10
[INFO] [stdout]    |
[INFO] [stdout] 20 |     enum Lexeme {
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `match_char`, `lexeme_to_char`, and `set` are never used
[INFO] [stdout]   --> src/parser.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     impl Lexeme {
[INFO] [stdout]    |     ----------- associated items in this implementation
[INFO] [stdout] 29 |         fn match_char(character: char) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |         fn lexeme_to_char(self) -> char {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |         fn set(&mut self, new_lex: Lexeme) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `fromchar` is never used
[INFO] [stdout]   --> src/parser.rs:67:12
[INFO] [stdout]    |
[INFO] [stdout] 66 |     impl CharCost {
[INFO] [stdout]    |     ------------- associated function in this implementation
[INFO] [stdout] 67 |         fn fromchar(singleton: char) -> Self {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `is_in`, `new`, `plus_literal`, and `plus_range` are never used
[INFO] [stdout]   --> src/parser.rs:73:12
[INFO] [stdout]    |
[INFO] [stdout] 72 |     impl CharClass {
[INFO] [stdout]    |     -------------- associated items in this implementation
[INFO] [stdout] 73 |         fn is_in(&self, letter: char) -> bool {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 77 |         fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 84 |         fn plus_literal(&mut self, new_char: char) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 88 |         fn plus_range(&mut self, start_char: char, end_char: char) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lexer` is never used
[INFO] [stdout]   --> src/parser.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 94 |     fn lexer(regex: String) -> Result<Vec<Lexeme>,Error> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ParserState` is never used
[INFO] [stdout]    --> src/parser.rs:145:10
[INFO] [stdout]     |
[INFO] [stdout] 145 |     enum ParserState {
[INFO] [stdout]     |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add_cost` and `add_cost_range` are never used
[INFO] [stdout]    --> src/parser.rs:152:12
[INFO] [stdout]     |
[INFO] [stdout] 151 |     impl ParserState {
[INFO] [stdout]     |     ---------------- methods in this implementation
[INFO] [stdout] 152 |         fn add_cost(&mut self, new_char: char) {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 159 |         fn add_cost_range(&mut self, start_char: char, end_char: char) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parser` is never used
[INFO] [stdout]    --> src/parser.rs:167:12
[INFO] [stdout]     |
[INFO] [stdout] 167 |     pub fn parser(regex: String) -> Result<Graph<CharCost>, Error> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MatchData` is never constructed
[INFO] [stdout]  --> src/automata.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 |     struct MatchData {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_automata` is never used
[INFO] [stdout]   --> src/automata.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn run_automata(automata: Graph<CharCost>, code: String) -> Vec<MatchData> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `char`
[INFO] [stdout]    --> src/parser.rs:205:34
[INFO] [stdout]     |
[INFO] [stdout] 205 |                 (Lexeme::Builtin(char), ParserState::QualWithoutClass(_)) | (Lexeme::Builtin(char), ParserState::OutOfClassWithoutQual) => {
[INFO] [stdout]     |                                  ^^^^                                                        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 205 |                 (Lexeme::Builtin(_char), ParserState::QualWithoutClass(_)) | (Lexeme::Builtin(_char), ParserState::OutOfClassWithoutQual) => {
[INFO] [stdout]     |                                  +                                                            +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `automata`
[INFO] [stdout]   --> src/automata.rs:10:21
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn run_automata(automata: Graph<CharCost>, code: String) -> Vec<MatchData> {
[INFO] [stdout]    |                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_automata`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `code`
[INFO] [stdout]   --> src/automata.rs:10:48
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn run_automata(automata: Graph<CharCost>, code: String) -> Vec<MatchData> {
[INFO] [stdout]    |                                                ^^^^ help: if this is intentional, prefix it with an underscore: `_code`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `compile` is never used
[INFO] [stdout]    --> src/graph.rs:116:16
[INFO] [stdout]     |
[INFO] [stdout] 26  |     impl<T> Graph<T> {
[INFO] [stdout]     |     ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 116 |         pub fn compile(self) -> Self {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set` is never used
[INFO] [stdout]   --> src/parser.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     impl Lexeme {
[INFO] [stdout]    |     ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 61 |         fn set(&mut self, new_lex: Lexeme) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/parser.rs:147:17
[INFO] [stdout]     |
[INFO] [stdout] 147 |         InClass(NodeIndex, CharClass),
[INFO] [stdout]     |         ------- ^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         field in this variant
[INFO] [stdout]     |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 147 -         InClass(NodeIndex, CharClass),
[INFO] [stdout] 147 +         InClass((), CharClass),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MatchData` is never constructed
[INFO] [stdout]  --> src/automata.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 |     struct MatchData {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_automata` is never used
[INFO] [stdout]   --> src/automata.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn run_automata(automata: Graph<CharCost>, code: String) -> Vec<MatchData> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "3450ad9e2c20f35433f3350c9aa9f581a5f32a28d3fbaf9c400b440f07cfaed1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3450ad9e2c20f35433f3350c9aa9f581a5f32a28d3fbaf9c400b440f07cfaed1", kill_on_drop: false }`
[INFO] [stdout] 3450ad9e2c20f35433f3350c9aa9f581a5f32a28d3fbaf9c400b440f07cfaed1