[INFO] updating cached repository https://github.com/Ragarnoy/expert_system
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 20f2886500f8b9ee5b30312072b3a5966914005c
[INFO] checking Ragarnoy/expert_system against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRagarnoy%2Fexpert_system" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Ragarnoy/expert_system on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Ragarnoy/expert_system
[INFO] finished tweaking git repo https://github.com/Ragarnoy/expert_system
[INFO] tweaked toml for git repo https://github.com/Ragarnoy/expert_system written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/Ragarnoy/expert_system already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 78e56fc407bab35d0290d7ebcd98e793204284977cdd56862d70f8c4fb1a4ceb
[INFO] running `"docker" "start" "-a" "78e56fc407bab35d0290d7ebcd98e793204284977cdd56862d70f8c4fb1a4ceb"`
[INFO] [stderr]     Checking expert_system v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `oper`
[INFO] [stderr]   --> src/main.rs:31:13
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let mut oper: Vec<Operation> = Vec::new();
[INFO] [stderr]    |             ^^^^ help: consider prefixing with an underscore: `_oper`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/main.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |     for f in facts.iter()
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ret`
[INFO] [stderr]   --> src/main.rs:96:12
[INFO] [stderr]    |
[INFO] [stderr] 96 |         Ok(ret) => 1,
[INFO] [stderr]    |            ^^^ help: consider prefixing with an underscore: `_ret`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `error`
[INFO] [stderr]   --> src/main.rs:97:13
[INFO] [stderr]    |
[INFO] [stderr] 97 |         Err(error) => 0,
[INFO] [stderr]    |             ^^^^^ help: consider prefixing with an underscore: `_error`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rules`
[INFO] [stderr]   --> src/operation.rs:77:38
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn resolve_as_conclusion(&self, rules: &Vec<Rule>, known: &mut HashMap<Fact, Option<bool>>, seen: &mut HashMap<Rule, Vec<Fact>>, result: bool) -> HashMap<Fact, Option<bool>>
[INFO] [stderr]    |                                         ^^^^^ help: consider prefixing with an underscore: `_rules`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `known`
[INFO] [stderr]   --> src/operation.rs:77:57
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn resolve_as_conclusion(&self, rules: &Vec<Rule>, known: &mut HashMap<Fact, Option<bool>>, seen: &mut HashMap<Rule, Vec<Fact>>, result: bool) -> HashMap<Fact, Option<bool>>
[INFO] [stderr]    |                                                            ^^^^^ help: consider prefixing with an underscore: `_known`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `seen`
[INFO] [stderr]   --> src/operation.rs:77:98
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn resolve_as_conclusion(&self, rules: &Vec<Rule>, known: &mut HashMap<Fact, Option<bool>>, seen: &mut HashMap<Rule, Vec<Fact>>, result: bool) -> HashMap<Fact, Option<bool>>
[INFO] [stderr]    |                                                                                                     ^^^^ help: consider prefixing with an underscore: `_seen`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let mut oper: Vec<Operation> = Vec::new();
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `oper`
[INFO] [stderr]   --> src/main.rs:31:13
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let mut oper: Vec<Operation> = Vec::new();
[INFO] [stderr]    |             ^^^^ help: consider prefixing with an underscore: `_oper`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/main.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |     for f in facts.iter()
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ret`
[INFO] [stderr]   --> src/main.rs:96:12
[INFO] [stderr]    |
[INFO] [stderr] 96 |         Ok(ret) => 1,
[INFO] [stderr]    |            ^^^ help: consider prefixing with an underscore: `_ret`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/fact.rs:41:2
[INFO] [stderr]    |
[INFO] [stderr] 41 |     pub fn new(input: &str) -> Result<Self, String>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `error`
[INFO] [stderr]   --> src/main.rs:97:13
[INFO] [stderr]    |
[INFO] [stderr] 97 |         Err(error) => 0,
[INFO] [stderr]    |             ^^^^^ help: consider prefixing with an underscore: `_error`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_not`
[INFO] [stderr]   --> src/fact.rs:87:2
[INFO] [stderr]    |
[INFO] [stderr] 87 |     pub fn is_not(&self) -> bool
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `resolve`
[INFO] [stderr]   --> src/fact.rs:92:2
[INFO] [stderr]    |
[INFO] [stderr] 92 |     pub fn resolve(&self, rules: &Vec<Rule>, known: &mut HashMap<Fact, Option<bool>>, seen: &mut HashMap<Rule, Vec<Fact>>) -> Option<bool>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rules`
[INFO] [stderr]   --> src/operation.rs:77:38
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn resolve_as_conclusion(&self, rules: &Vec<Rule>, known: &mut HashMap<Fact, Option<bool>>, seen: &mut HashMap<Rule, Vec<Fact>>, result: bool) -> HashMap<Fact, Option<bool>>
[INFO] [stderr]    |                                         ^^^^^ help: consider prefixing with an underscore: `_rules`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `And`
[INFO] [stderr]  --> src/operators.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     And,
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `known`
[INFO] [stderr]   --> src/operation.rs:77:57
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn resolve_as_conclusion(&self, rules: &Vec<Rule>, known: &mut HashMap<Fact, Option<bool>>, seen: &mut HashMap<Rule, Vec<Fact>>, result: bool) -> HashMap<Fact, Option<bool>>
[INFO] [stderr]    |                                                            ^^^^^ help: consider prefixing with an underscore: `_known`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `seen`
[INFO] [stderr]   --> src/operation.rs:77:98
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn resolve_as_conclusion(&self, rules: &Vec<Rule>, known: &mut HashMap<Fact, Option<bool>>, seen: &mut HashMap<Rule, Vec<Fact>>, result: bool) -> HashMap<Fact, Option<bool>>
[INFO] [stderr]    |                                                                                                     ^^^^ help: consider prefixing with an underscore: `_seen`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Or`
[INFO] [stderr]  --> src/operators.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Or,
[INFO] [stderr]   |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Xor`
[INFO] [stderr]  --> src/operators.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     Xor,
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `IfOnly`
[INFO] [stderr]  --> src/operators.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     IfOnly,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/operators.rs:21:2
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub fn new(input: &str) -> Result<Self, String>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let mut oper: Vec<Operation> = Vec::new();
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `resolve`
[INFO] [stderr]   --> src/operators.rs:38:2
[INFO] [stderr]    |
[INFO] [stderr] 38 |     pub fn resolve(&self, value0: Option<bool>, value1: Option<bool>) -> Option<bool>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `resolve`
[INFO] [stderr]   --> src/operation.rs:72:2
[INFO] [stderr]    |
[INFO] [stderr] 72 |     pub fn resolve(&self, rules: &Vec<Rule>, known: &mut HashMap<Fact, Option<bool>>, seen: &mut HashMap<Rule, Vec<Fact>>) -> Option<bool>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `resolve_as_conclusion`
[INFO] [stderr]   --> src/operation.rs:77:2
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn resolve_as_conclusion(&self, rules: &Vec<Rule>, known: &mut HashMap<Fact, Option<bool>>, seen: &mut HashMap<Rule, Vec<Fact>>, result: bool) -> HashMap<Fact, Option<bool>>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_facts`
[INFO] [stderr]    --> src/operation.rs:104:2
[INFO] [stderr]     |
[INFO] [stderr] 104 |     pub fn get_facts(&self) -> Vec<Fact>
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `contains_fact`
[INFO] [stderr]    --> src/operation.rs:111:2
[INFO] [stderr]     |
[INFO] [stderr] 111 |     pub fn contains_fact(&self, fact: &Fact) -> bool
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Operation`
[INFO] [stderr]  --> src/token.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     Operation(Operation),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `resolve`
[INFO] [stderr]   --> src/token.rs:46:2
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn resolve(&self, rules: &Vec<Rule>, known: &mut HashMap<Fact, Option<bool>>, seen: &mut HashMap<Rule, Vec<Fact>>) -> Option<bool>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `resolve_as_conclusion`
[INFO] [stderr]   --> src/token.rs:56:2
[INFO] [stderr]    |
[INFO] [stderr] 56 |     pub fn resolve_as_conclusion(&self, rules: &Vec<Rule>, known: &mut HashMap<Fact, Option<bool>>, seen: &mut HashMap<Rule, Vec<Fact>>, result: bool) -> HashMap<Fact, Option<bool>>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `contains_fact`
[INFO] [stderr]   --> src/token.rs:69:2
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub fn contains_fact(&self, fact: &Fact) -> bool
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_facts`
[INFO] [stderr]   --> src/token.rs:78:2
[INFO] [stderr]    |
[INFO] [stderr] 78 |     pub fn get_facts(&self) -> Vec<Fact>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `resolve`
[INFO] [stderr]   --> src/rules.rs:14:2
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn resolve(&self, rules: &Vec<Rule>, known: &mut HashMap<Fact, Option<bool>>, seen: &mut HashMap<Rule, Vec<Fact>>) -> HashMap<Fact, Option<bool>>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `has_been_seen_for_fact`
[INFO] [stderr]   --> src/rules.rs:24:2
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn has_been_seen_for_fact(&self, seen: &mut HashMap<Rule, Vec<Fact>>, fact: &Fact) -> bool
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `contains_fact_as_conclusion`
[INFO] [stderr]   --> src/rules.rs:29:2
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn contains_fact_as_conclusion(&self, fact: &Fact) -> bool
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tokenize`
[INFO] [stderr]   --> src/main.rs:29:4
[INFO] [stderr]    |
[INFO] [stderr] 29 | fn tokenize(facts: Vec<&str>)
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Xor`
[INFO] [stderr]  --> src/operators.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     Xor,
[INFO] [stderr]   |     ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `IfOnly`
[INFO] [stderr]  --> src/operators.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     IfOnly,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/operators.rs:21:2
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub fn new(input: &str) -> Result<Self, String>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tokenize`
[INFO] [stderr]   --> src/main.rs:29:4
[INFO] [stderr]    |
[INFO] [stderr] 29 | fn tokenize(facts: Vec<&str>)
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.50s
[INFO] running `"docker" "inspect" "78e56fc407bab35d0290d7ebcd98e793204284977cdd56862d70f8c4fb1a4ceb"`
[INFO] running `"docker" "rm" "-f" "78e56fc407bab35d0290d7ebcd98e793204284977cdd56862d70f8c4fb1a4ceb"`
[INFO] [stdout] 78e56fc407bab35d0290d7ebcd98e793204284977cdd56862d70f8c4fb1a4ceb