[INFO] cloning repository https://github.com/b-eyselein/rust_ebnf_tester
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/b-eyselein/rust_ebnf_tester" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fb-eyselein%2Frust_ebnf_tester", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fb-eyselein%2Frust_ebnf_tester'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dab4f7441de417e419b49a54bae3874d19b3cc08
[INFO] checking b-eyselein/rust_ebnf_tester against master#5518eaa946291f00471af8b254b2a1715f234882 for pr-120393
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fb-eyselein%2Frust_ebnf_tester" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/b-eyselein/rust_ebnf_tester on toolchain 5518eaa946291f00471af8b254b2a1715f234882
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/b-eyselein/rust_ebnf_tester
[INFO] finished tweaking git repo https://github.com/b-eyselein/rust_ebnf_tester
[INFO] tweaked toml for git repo https://github.com/b-eyselein/rust_ebnf_tester written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/b-eyselein/rust_ebnf_tester 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" "+5518eaa946291f00471af8b254b2a1715f234882" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking b-eyselein/rust_ebnf_tester against try#7622c0f807a4e13c4db886a1681bf343795692df+rustflags=-Dnon_local_definitions for pr-120393
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fb-eyselein%2Frust_ebnf_tester" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/b-eyselein/rust_ebnf_tester on toolchain 7622c0f807a4e13c4db886a1681bf343795692df
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7622c0f807a4e13c4db886a1681bf343795692df" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/b-eyselein/rust_ebnf_tester
[INFO] finished tweaking git repo https://github.com/b-eyselein/rust_ebnf_tester
[INFO] tweaked toml for git repo https://github.com/b-eyselein/rust_ebnf_tester written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/b-eyselein/rust_ebnf_tester 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" "+7622c0f807a4e13c4db886a1681bf343795692df" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking b-eyselein/rust_ebnf_tester against try#7622c0f807a4e13c4db886a1681bf343795692df+rustflags=-Dnon_local_definitions for pr-120393
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fb-eyselein%2Frust_ebnf_tester" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/b-eyselein/rust_ebnf_tester on toolchain 7622c0f807a4e13c4db886a1681bf343795692df
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7622c0f807a4e13c4db886a1681bf343795692df" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/b-eyselein/rust_ebnf_tester
[INFO] finished tweaking git repo https://github.com/b-eyselein/rust_ebnf_tester
[INFO] tweaked toml for git repo https://github.com/b-eyselein/rust_ebnf_tester written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/b-eyselein/rust_ebnf_tester 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" "+7622c0f807a4e13c4db886a1681bf343795692df" "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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+7622c0f807a4e13c4db886a1681bf343795692df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b33a51dd893d95e4acd07766960d2e4e9e3d5da0f11da4d24e74f2bda5a0efed
[INFO] running `Command { std: "docker" "start" "-a" "b33a51dd893d95e4acd07766960d2e4e9e3d5da0f11da4d24e74f2bda5a0efed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b33a51dd893d95e4acd07766960d2e4e9e3d5da0f11da4d24e74f2bda5a0efed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b33a51dd893d95e4acd07766960d2e4e9e3d5da0f11da4d24e74f2bda5a0efed", kill_on_drop: false }`
[INFO] [stdout] b33a51dd893d95e4acd07766960d2e4e9e3d5da0f11da4d24e74f2bda5a0efed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Dnon_local_definitions" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+7622c0f807a4e13c4db886a1681bf343795692df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7c6887d3f338c949187ca1e2d1cfa5226c59a26752fd31096fe5b797303182cd
[INFO] running `Command { std: "docker" "start" "-a" "7c6887d3f338c949187ca1e2d1cfa5226c59a26752fd31096fe5b797303182cd", kill_on_drop: false }`
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking ebnf_tester v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variants `Epsilon`, `Terminal`, `Variable`, `Optional`, `Alternative`, and `Sequence` are never constructed
[INFO] [stdout]   --> src/backus_naur_form.rs:5:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | pub enum BackusNaurProduction {
[INFO] [stdout]    |          -------------------- variants in this enum
[INFO] [stdout] 5  |     Epsilon,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 6  |     Terminal(Terminal),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 7  |     Variable(Variable),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 8  |     Optional(Box<BackusNaurProduction>),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 9  |     Alternative(Vec<BackusNaurProduction>),
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 10 |     Sequence(Vec<BackusNaurProduction>),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `BackusNaurProduction` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Cell` is never used
[INFO] [stdout]  --> src/chomsky_normal_form.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 7 | type Cell<'a> = HashSet<&'a char>;
[INFO] [stdout]   |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Row` is never used
[INFO] [stdout]  --> src/chomsky_normal_form.rs:8:6
[INFO] [stdout]   |
[INFO] [stdout] 8 | type Row<'a> = Vec<Cell<'a>>;
[INFO] [stdout]   |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `ChomskyTable` is never used
[INFO] [stdout]  --> src/chomsky_normal_form.rs:9:6
[INFO] [stdout]   |
[INFO] [stdout] 9 | type ChomskyTable<'a> = Vec<Row<'a>>;
[INFO] [stdout]   |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ChomskyGrammar` is never constructed
[INFO] [stdout]   --> src/chomsky_normal_form.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct ChomskyGrammar {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `search_rules_producing_terminal`, `search_rules_producing_sequence`, `build_table`, and `derive` are never used
[INFO] [stdout]   --> src/chomsky_normal_form.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl ChomskyGrammar {
[INFO] [stdout]    | ------------------- methods in this implementation
[INFO] [stdout] 17 |     /// checks which vars produce c as terminal...
[INFO] [stdout] 18 |     fn search_rules_producing_terminal(&self, terminal: &char) -> Cell {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn search_rules_producing_sequence(&self, first_var: &char, second_var: &char) -> Cell {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     fn build_table(&self, word: &[char]) -> ChomskyTable {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 63 |     pub fn derive(&self, word: &[char]) -> bool {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ChomskyProduction` is never used
[INFO] [stdout]  --> src/chomsky_production.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum ChomskyProduction {
[INFO] [stdout]   |          ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `produces_terminal` and `produces_sequence` are never used
[INFO] [stdout]   --> src/chomsky_production.rs:9:12
[INFO] [stdout]    |
[INFO] [stdout] 8  | impl ChomskyProduction {
[INFO] [stdout]    | ---------------------- methods in this implementation
[INFO] [stdout] 9  |     pub fn produces_terminal(&self, c: &char) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub fn produces_sequence(&self, var1: &char, var2: &char) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `convert_child_elements` is never used
[INFO] [stdout]   --> src/extended_backus_naur_form/mod.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn convert_child_elements(child_elements: &Vec<ExtendedBackusNaurProduction>) -> ElementsConversionResult {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `next_variable` is never used
[INFO] [stdout]   --> src/extended_backus_naur_form/mod.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn next_variable() -> Variable {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `convert_to_bnf` is never used
[INFO] [stdout]   --> src/extended_backus_naur_form/mod.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn convert_to_bnf(el: &ExtendedBackusNaurProduction) -> ElementConversionResult {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple variants are never constructed
[INFO] [stdout]   --> src/extended_backus_naur_form/ebnf_element.rs:7:5
[INFO] [stdout]    |
[INFO] [stdout] 6  | pub enum ExtendedBackusNaurProduction {
[INFO] [stdout]    |          ---------------------------- variants in this enum
[INFO] [stdout] 7  |     Epsilon,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 8  |     Terminal(Terminal),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 9  |     Variable(Variable),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 10 |     Optional(Box<ExtendedBackusNaurProduction>),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 11 |     RepetitionZero(Box<ExtendedBackusNaurProduction>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 12 |     RepetitionOne(Box<ExtendedBackusNaurProduction>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 13 |     Alternative(Vec<ExtendedBackusNaurProduction>),
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 14 |     Sequence(Vec<ExtendedBackusNaurProduction>),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ExtendedBackusNaurProduction` 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: associated function `simple` is never used
[INFO] [stdout]   --> src/extended_backus_naur_form/element_conversion_result.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl ElementConversionResult<'_> {
[INFO] [stdout]    | -------------------------------- associated function in this implementation
[INFO] [stdout] 16 |     pub fn simple(output_element: BackusNaurProduction) -> Self {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `empty` is never used
[INFO] [stdout]   --> src/extended_backus_naur_form/element_conversion_result.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl ElementsConversionResult<'_> {
[INFO] [stdout]    | --------------------------------- associated function in this implementation
[INFO] [stdout] 35 |     pub fn empty() -> Self {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `Command { std: "docker" "inspect" "7c6887d3f338c949187ca1e2d1cfa5226c59a26752fd31096fe5b797303182cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c6887d3f338c949187ca1e2d1cfa5226c59a26752fd31096fe5b797303182cd", kill_on_drop: false }`
[INFO] [stdout] 7c6887d3f338c949187ca1e2d1cfa5226c59a26752fd31096fe5b797303182cd
