[INFO] cloning repository https://github.com/JDemler/BidirectionalTypechecking
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JDemler/BidirectionalTypechecking" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJDemler%2FBidirectionalTypechecking", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJDemler%2FBidirectionalTypechecking'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1ca2a40121addb09df18c5b0191b23c47abc9456
[INFO] checking JDemler/BidirectionalTypechecking against master#9fa580b1175018b0a276b0bc68f9827a106f7260 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJDemler%2FBidirectionalTypechecking" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JDemler/BidirectionalTypechecking on toolchain 9fa580b1175018b0a276b0bc68f9827a106f7260
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JDemler/BidirectionalTypechecking
[INFO] finished tweaking git repo https://github.com/JDemler/BidirectionalTypechecking
[INFO] tweaked toml for git repo https://github.com/JDemler/BidirectionalTypechecking written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/JDemler/BidirectionalTypechecking already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ef2f46cac522542a8de63fb5c85bf5f9db3cd2553d4b40c3c92c573eb99dbbe3
[INFO] running `Command { std: "docker" "start" "-a" "ef2f46cac522542a8de63fb5c85bf5f9db3cd2553d4b40c3c92c573eb99dbbe3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef2f46cac522542a8de63fb5c85bf5f9db3cd2553d4b40c3c92c573eb99dbbe3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef2f46cac522542a8de63fb5c85bf5f9db3cd2553d4b40c3c92c573eb99dbbe3", kill_on_drop: false }`
[INFO] [stdout] ef2f46cac522542a8de63fb5c85bf5f9db3cd2553d4b40c3c92c573eb99dbbe3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c68b0ca9cefa2e7db3d3ccc670da0247b8096a9cdadb48a180a46c6c8a94d54
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2c68b0ca9cefa2e7db3d3ccc670da0247b8096a9cdadb48a180a46c6c8a94d54", kill_on_drop: false }`
[INFO] [stderr]     Checking bidirectional_typeinference v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `right_context`
[INFO] [stdout]    --> src/main.rs:591:24
[INFO] [stdout]     |
[INFO] [stdout] 591 |     let (left_context, right_context) =
[INFO] [stdout]     |                        ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_right_context`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right_context`
[INFO] [stdout]    --> src/main.rs:655:24
[INFO] [stdout]     |
[INFO] [stdout] 655 |     let (left_context, right_context) =
[INFO] [stdout]     |                        ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_right_context`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right_context`
[INFO] [stdout]    --> src/main.rs:591:24
[INFO] [stdout]     |
[INFO] [stdout] 591 |     let (left_context, right_context) =
[INFO] [stdout]     |                        ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_right_context`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right_context`
[INFO] [stdout]    --> src/main.rs:655:24
[INFO] [stdout]     |
[INFO] [stdout] 655 |     let (left_context, right_context) =
[INFO] [stdout]     |                        ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_right_context`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Variable`
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Variable(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Char`
[INFO] [stdout]   --> src/main.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     Char(char),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Literal`
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Literal(Literal),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Abstraction`
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Abstraction(String, Box<Expression>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Application`
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Application(Box<Expression>, Box<Expression>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Let`
[INFO] [stdout]   --> src/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     Let(String, Box<Expression>, Box<Expression>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Annotation`
[INFO] [stdout]   --> src/main.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     Annotation(Box<Expression>, Type),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Tuple`
[INFO] [stdout]   --> src/main.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     Tuple(Box<Expression>, Box<Expression>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Char`
[INFO] [stdout]   --> src/main.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     Char(char),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `String`
[INFO] [stdout]   --> src/main.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     String(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Int`
[INFO] [stdout]   --> src/main.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     Int(isize),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Float`
[INFO] [stdout]   --> src/main.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     Float(f64),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Bool`
[INFO] [stdout]   --> src/main.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     Bool(bool),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Unit`
[INFO] [stdout]   --> src/main.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     Unit,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Literal`
[INFO] [stdout]   --> src/main.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 |     Literal(LiteralType),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Variable`
[INFO] [stdout]   --> src/main.rs:65:5
[INFO] [stdout]    |
[INFO] [stdout] 65 |     Variable(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Existential`
[INFO] [stdout]   --> src/main.rs:66:5
[INFO] [stdout]    |
[INFO] [stdout] 66 |     Existential(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quantification`
[INFO] [stdout]   --> src/main.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 67 |     Quantification(String, Box<Type>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Function`
[INFO] [stdout]   --> src/main.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     Function(Box<Type>, Box<Type>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Product`
[INFO] [stdout]   --> src/main.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 69 |     Product(Box<Type>, Box<Type>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Unit`
[INFO] [stdout]   --> src/main.rs:87:5
[INFO] [stdout]    |
[INFO] [stdout] 87 |     Unit,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Char`
[INFO] [stdout]   --> src/main.rs:88:5
[INFO] [stdout]    |
[INFO] [stdout] 88 |     Char,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `String`
[INFO] [stdout]   --> src/main.rs:89:5
[INFO] [stdout]    |
[INFO] [stdout] 89 |     String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Int`
[INFO] [stdout]   --> src/main.rs:90:5
[INFO] [stdout]    |
[INFO] [stdout] 90 |     Int,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Float`
[INFO] [stdout]   --> src/main.rs:91:5
[INFO] [stdout]    |
[INFO] [stdout] 91 |     Float,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Bool`
[INFO] [stdout]   --> src/main.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 |     Bool,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_monotype`
[INFO] [stdout]    --> src/main.rs:109:8
[INFO] [stdout]     |
[INFO] [stdout] 109 |     fn is_monotype(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Variable`
[INFO] [stdout]    --> src/main.rs:120:5
[INFO] [stdout]     |
[INFO] [stdout] 120 |     Variable(String),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Existential`
[INFO] [stdout]    --> src/main.rs:121:5
[INFO] [stdout]     |
[INFO] [stdout] 121 |     Existential(String),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Solved`
[INFO] [stdout]    --> src/main.rs:122:5
[INFO] [stdout]     |
[INFO] [stdout] 122 |     Solved(String, Type),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Marker`
[INFO] [stdout]    --> src/main.rs:123:5
[INFO] [stdout]     |
[INFO] [stdout] 123 |     Marker(String),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `TypedVariable`
[INFO] [stdout]    --> src/main.rs:124:5
[INFO] [stdout]     |
[INFO] [stdout] 124 |     TypedVariable(String, Type),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `initial`
[INFO] [stdout]    --> src/main.rs:161:8
[INFO] [stdout]     |
[INFO] [stdout] 161 |     fn initial() -> Self {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add`
[INFO] [stdout]    --> src/main.rs:167:8
[INFO] [stdout]     |
[INFO] [stdout] 167 |     fn add(&self, element: ContextElement) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `split_at`
[INFO] [stdout]    --> src/main.rs:173:8
[INFO] [stdout]     |
[INFO] [stdout] 173 |     fn split_at(&self, element: ContextElement) -> (Context, Context) {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert_in_place`
[INFO] [stdout]    --> src/main.rs:188:8
[INFO] [stdout]     |
[INFO] [stdout] 188 |     fn insert_in_place(&self, element: ContextElement, inserts: Vec<ContextElement>) -> Self {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `drop`
[INFO] [stdout]    --> src/main.rs:197:8
[INFO] [stdout]     |
[INFO] [stdout] 197 |     fn drop(&self, element: ContextElement) -> Self {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_solved`
[INFO] [stdout]    --> src/main.rs:206:8
[INFO] [stdout]     |
[INFO] [stdout] 206 |     fn get_solved(&self, alpha: &str) -> Option<&Type> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `has_existential`
[INFO] [stdout]    --> src/main.rs:217:8
[INFO] [stdout]     |
[INFO] [stdout] 217 |     fn has_existential(&self, alpha: &str) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `has_variable`
[INFO] [stdout]    --> src/main.rs:223:8
[INFO] [stdout]     |
[INFO] [stdout] 223 |     fn has_variable(&self, alpha: &str) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_annotation`
[INFO] [stdout]    --> src/main.rs:229:8
[INFO] [stdout]     |
[INFO] [stdout] 229 |     fn get_annotation(&self, x: &str) -> Option<&Type> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `initial`
[INFO] [stdout]    --> src/main.rs:250:8
[INFO] [stdout]     |
[INFO] [stdout] 250 |     fn initial() -> State {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fresh_existential`
[INFO] [stdout]    --> src/main.rs:254:8
[INFO] [stdout]     |
[INFO] [stdout] 254 |     fn fresh_existential(&mut self) -> String {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `literal_checks_against`
[INFO] [stdout]    --> src/main.rs:261:4
[INFO] [stdout]     |
[INFO] [stdout] 261 | fn literal_checks_against(literal: &Literal, type_: &LiteralType) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `checks_against`
[INFO] [stdout]    --> src/main.rs:274:4
[INFO] [stdout]     |
[INFO] [stdout] 274 | fn checks_against(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `literal_synthesizes_to`
[INFO] [stdout]    --> src/main.rs:323:4
[INFO] [stdout]     |
[INFO] [stdout] 323 | fn literal_synthesizes_to(literal: &Literal) -> LiteralType {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `synthesizes_to`
[INFO] [stdout]    --> src/main.rs:335:4
[INFO] [stdout]     |
[INFO] [stdout] 335 | fn synthesizes_to(state: &mut State, context: &Context, expr: &Expression) -> (Type, Context) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `application_synthesizes_to`
[INFO] [stdout]    --> src/main.rs:411:4
[INFO] [stdout]     |
[INFO] [stdout] 411 | fn application_synthesizes_to(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_well_formed`
[INFO] [stdout]    --> src/main.rs:465:4
[INFO] [stdout]     |
[INFO] [stdout] 465 | fn is_well_formed(context: &Context, type_: &Type) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `occurs_in`
[INFO] [stdout]    --> src/main.rs:483:4
[INFO] [stdout]     |
[INFO] [stdout] 483 | fn occurs_in(alpha: &str, a: &Type) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `subtype`
[INFO] [stdout]    --> src/main.rs:501:4
[INFO] [stdout]     |
[INFO] [stdout] 501 | fn subtype(state: &mut State, context: &Context, a: &Type, b: &Type) -> Context {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `instantiate_l`
[INFO] [stdout]    --> src/main.rs:589:4
[INFO] [stdout]     |
[INFO] [stdout] 589 | fn instantiate_l(state: &mut State, context: &Context, alpha: &str, b: &Type) -> Context {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `instantiate_r`
[INFO] [stdout]    --> src/main.rs:653:4
[INFO] [stdout]     |
[INFO] [stdout] 653 | fn instantiate_r(state: &mut State, context: &Context, a: &Type, alpha: &str) -> Context {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `apply_context`
[INFO] [stdout]    --> src/main.rs:743:4
[INFO] [stdout]     |
[INFO] [stdout] 743 | fn apply_context(a: Type, context: &Context) -> Type {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `substitution`
[INFO] [stdout]    --> src/main.rs:773:4
[INFO] [stdout]     |
[INFO] [stdout] 773 | fn substitution(a: &Type, alpha: &str, b: &Type) -> Type {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `synth`
[INFO] [stdout]    --> src/main.rs:808:4
[INFO] [stdout]     |
[INFO] [stdout] 808 | fn synth(expression: Expression) -> Type {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_helper`
[INFO] [stdout]    --> src/main.rs:819:4
[INFO] [stdout]     |
[INFO] [stdout] 819 | fn print_helper(fun: &str, c1: String, c2: String, context: &Context) {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_rule`
[INFO] [stdout]    --> src/main.rs:829:4
[INFO] [stdout]     |
[INFO] [stdout] 829 | fn print_rule(rule: &str) {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `literal_string`
[INFO] [stdout]    --> src/main.rs:833:4
[INFO] [stdout]     |
[INFO] [stdout] 833 | fn literal_string() -> Expression {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `literal_bool`
[INFO] [stdout]    --> src/main.rs:837:4
[INFO] [stdout]     |
[INFO] [stdout] 837 | fn literal_bool() -> Expression {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `construct_app`
[INFO] [stdout]     --> src/main.rs:1024:4
[INFO] [stdout]      |
[INFO] [stdout] 1024 | fn construct_app(e0: Expression, e1: Expression) -> Expression {
[INFO] [stdout]      |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `construct_let`
[INFO] [stdout]     --> src/main.rs:1028:4
[INFO] [stdout]      |
[INFO] [stdout] 1028 | fn construct_let(var: &str, e0: Expression, body: Expression) -> Expression {
[INFO] [stdout]      |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `id_fn`
[INFO] [stdout]     --> src/main.rs:1032:4
[INFO] [stdout]      |
[INFO] [stdout] 1032 | fn id_fn() -> Expression {
[INFO] [stdout]      |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Int`
[INFO] [stdout]   --> src/main.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     Int(isize),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Float`
[INFO] [stdout]   --> src/main.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     Float(f64),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Unit`
[INFO] [stdout]   --> src/main.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     Unit,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/main.rs:200:13
[INFO] [stdout]     |
[INFO] [stdout] 200 |             eles.split_off(index);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/main.rs:200:13
[INFO] [stdout]     |
[INFO] [stdout] 200 |             eles.split_off(index);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 65 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.11s
[INFO] running `Command { std: "docker" "inspect" "2c68b0ca9cefa2e7db3d3ccc670da0247b8096a9cdadb48a180a46c6c8a94d54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c68b0ca9cefa2e7db3d3ccc670da0247b8096a9cdadb48a180a46c6c8a94d54", kill_on_drop: false }`
[INFO] [stdout] 2c68b0ca9cefa2e7db3d3ccc670da0247b8096a9cdadb48a180a46c6c8a94d54