[INFO] cloning repository https://github.com/pigeon-project/pigeon_core
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pigeon-project/pigeon_core" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpigeon-project%2Fpigeon_core", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpigeon-project%2Fpigeon_core'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 26fb18ab2ea1e15289838e10f40ea80adf88cd2f
[INFO] checking pigeon-project/pigeon_core against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpigeon-project%2Fpigeon_core" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pigeon-project/pigeon_core on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/pigeon-project/pigeon_core
[INFO] finished tweaking git repo https://github.com/pigeon-project/pigeon_core
[INFO] tweaked toml for git repo https://github.com/pigeon-project/pigeon_core written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/pigeon-project/pigeon_core already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_json v1.0.46
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5f48a5754c1ce8d7b24e6dc340a59bf345a3df767b65aa63b3ca924893bad102
[INFO] running `Command { std: "docker" "start" "-a" "5f48a5754c1ce8d7b24e6dc340a59bf345a3df767b65aa63b3ca924893bad102", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5f48a5754c1ce8d7b24e6dc340a59bf345a3df767b65aa63b3ca924893bad102", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f48a5754c1ce8d7b24e6dc340a59bf345a3df767b65aa63b3ca924893bad102", kill_on_drop: false }`
[INFO] [stdout] 5f48a5754c1ce8d7b24e6dc340a59bf345a3df767b65aa63b3ca924893bad102
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1b9e07e59907b4af81f436e5ea6a70a7d31bcfa100f11174599bbcc1b0197eae
[INFO] running `Command { std: "docker" "start" "-a" "1b9e07e59907b4af81f436e5ea6a70a7d31bcfa100f11174599bbcc1b0197eae", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking serde_json v1.0.46
[INFO] [stderr]     Checking pigeon_core v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed src/mata_info/ast.rs (3 fixes)
[INFO] [stderr]        Fixed src/main.rs (5 fixes)
[INFO] [stderr]        Fixed src/type_checker.rs (1 fix)
[INFO] [stdout] warning: associated function is never used: `tree_node_assert`
[INFO] [stdout]   --> src/mata_info/node.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn tree_node_assert(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lit2ast`
[INFO] [stdout]   --> src/mata_info/node.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn lit2ast<T: std::str::FromStr>(&self, fun: fn(T) -> ast::Literal) -> Result<Expr, ()> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_ast`
[INFO] [stdout]   --> src/mata_info/node.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn to_ast(&self) -> Result<Expr, ()> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `CompileResult`
[INFO] [stdout]   --> src/mata_info/ast.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub type CompileResult<T> = Result<T, Vec<CompileError>>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unpack`
[INFO] [stdout]    --> src/mata_info/ast.rs:186:8
[INFO] [stdout]     |
[INFO] [stdout] 186 |     fn unpack(self) -> Expr {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `TYPE_ASSERT_ERR`
[INFO] [stdout]  --> src/type_checker.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | const TYPE_ASSERT_ERR: RErrorInfo = ("T0", "Expression type assertion error");
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `CALLEE_IS_NOT_FUNCTION_TYPE`
[INFO] [stdout]  --> src/type_checker.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | const CALLEE_IS_NOT_FUNCTION_TYPE: RErrorInfo = ("T1", "Callee is not a function type");
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `VARIABLE_IS_NOT_DEFINED`
[INFO] [stdout]  --> src/type_checker.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | const VARIABLE_IS_NOT_DEFINED: RErrorInfo = ("T2", "Variable is not defined");
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `UNIFICATION_ERROR`
[INFO] [stdout]  --> src/type_checker.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | const UNIFICATION_ERROR: &'static str = "T3";
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `new_path_level`
[INFO] [stdout]  --> src/type_checker.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn new_path_level(path: &Path, pos: u64) -> Path {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_unification_error`
[INFO] [stdout]   --> src/type_checker.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn make_unification_error(i: String) -> Result<(), ErrorInfo> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `unifier`
[INFO] [stdout]   --> src/type_checker.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn unifier(ty1: &TypeExpr, ty2: &TypeExpr) -> Result<(), ErrorInfo> {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `literal_infer`
[INFO] [stdout]   --> src/type_checker.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn literal_infer(lit: Literal) -> TypeExpr {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `expr_infer`
[INFO] [stdout]   --> src/type_checker.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn expr_infer(context: &Context, expr: Expr, path: Path) -> CompileResult<TypeExpr> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed src/main.rs (3 fixes)
[INFO] [stdout] warning: associated function is never used: `tree_node_assert`
[INFO] [stdout]   --> src/mata_info/node.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn tree_node_assert(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lit2ast`
[INFO] [stdout]   --> src/mata_info/node.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn lit2ast<T: std::str::FromStr>(&self, fun: fn(T) -> ast::Literal) -> Result<Expr, ()> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_ast`
[INFO] [stdout]   --> src/mata_info/node.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn to_ast(&self) -> Result<Expr, ()> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `CompileResult`
[INFO] [stdout]   --> src/mata_info/ast.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub type CompileResult<T> = Result<T, Vec<CompileError>>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unpack`
[INFO] [stdout]    --> src/mata_info/ast.rs:186:8
[INFO] [stdout]     |
[INFO] [stdout] 186 |     fn unpack(self) -> Expr {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `TYPE_ASSERT_ERR`
[INFO] [stdout]  --> src/type_checker.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | const TYPE_ASSERT_ERR: RErrorInfo = ("T0", "Expression type assertion error");
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `CALLEE_IS_NOT_FUNCTION_TYPE`
[INFO] [stdout]  --> src/type_checker.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | const CALLEE_IS_NOT_FUNCTION_TYPE: RErrorInfo = ("T1", "Callee is not a function type");
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `VARIABLE_IS_NOT_DEFINED`
[INFO] [stdout]  --> src/type_checker.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | const VARIABLE_IS_NOT_DEFINED: RErrorInfo = ("T2", "Variable is not defined");
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `UNIFICATION_ERROR`
[INFO] [stdout]  --> src/type_checker.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | const UNIFICATION_ERROR: &'static str = "T3";
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `new_path_level`
[INFO] [stdout]  --> src/type_checker.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn new_path_level(path: &Path, pos: u64) -> Path {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_unification_error`
[INFO] [stdout]   --> src/type_checker.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn make_unification_error(i: String) -> Result<(), ErrorInfo> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `unifier`
[INFO] [stdout]   --> src/type_checker.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn unifier(ty1: &TypeExpr, ty2: &TypeExpr) -> Result<(), ErrorInfo> {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `literal_infer`
[INFO] [stdout]   --> src/type_checker.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn literal_infer(lit: Literal) -> TypeExpr {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `expr_infer`
[INFO] [stdout]   --> src/type_checker.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn expr_infer(context: &Context, expr: Expr, path: Path) -> CompileResult<TypeExpr> {
[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 24.59s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Checking pigeon_core v0.1.0 (/tmp/fixit)
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Expr`
[INFO] [stdout]   --> src/main.rs:27:16
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let expr = Expr::Unknown;
[INFO] [stdout]    |                ^^^^ use of undeclared type `Expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Expr`
[INFO] [stdout]   --> src/main.rs:29:16
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let expr = Expr::Literal(Bool(true));
[INFO] [stdout]    |                ^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this enum
[INFO] [stdout]    |
[INFO] [stdout] 3  | use crate::mata_info::ast::Expr;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `Bool` in this scope
[INFO] [stdout]   --> src/main.rs:29:30
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let expr = Expr::Literal(Bool(true));
[INFO] [stdout]    |                              ^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]    |
[INFO] [stdout] 3  | use crate::type_checker::BaseType::Bool;
[INFO] [stdout]    |
[INFO] [stdout] 3  | use crate::type_checker::Literal::Bool;
[INFO] [stdout]    |
[INFO] [stdout] 3  | use serde::de::Unexpected::Bool;
[INFO] [stdout]    |
[INFO] [stdout] 3  | use serde::private::de::Content::Bool;
[INFO] [stdout]    |
[INFO] [stdout]      and 1 other candidate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0433.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pigeon_core` due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: associated function is never used: `tree_node_assert`
[INFO] [stdout]   --> src/mata_info/node.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn tree_node_assert(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lit2ast`
[INFO] [stdout]   --> src/mata_info/node.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn lit2ast<T: std::str::FromStr>(&self, fun: fn(T) -> ast::Literal) -> Result<Expr, ()> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_ast`
[INFO] [stdout]   --> src/mata_info/node.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn to_ast(&self) -> Result<Expr, ()> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `CompileResult`
[INFO] [stdout]   --> src/mata_info/ast.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub type CompileResult<T> = Result<T, Vec<CompileError>>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unpack`
[INFO] [stdout]    --> src/mata_info/ast.rs:186:8
[INFO] [stdout]     |
[INFO] [stdout] 186 |     fn unpack(self) -> Expr {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `TYPE_ASSERT_ERR`
[INFO] [stdout]  --> src/type_checker.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | const TYPE_ASSERT_ERR: RErrorInfo = ("T0", "Expression type assertion error");
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `CALLEE_IS_NOT_FUNCTION_TYPE`
[INFO] [stdout]  --> src/type_checker.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | const CALLEE_IS_NOT_FUNCTION_TYPE: RErrorInfo = ("T1", "Callee is not a function type");
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `VARIABLE_IS_NOT_DEFINED`
[INFO] [stdout]  --> src/type_checker.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | const VARIABLE_IS_NOT_DEFINED: RErrorInfo = ("T2", "Variable is not defined");
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `UNIFICATION_ERROR`
[INFO] [stdout]  --> src/type_checker.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | const UNIFICATION_ERROR: &'static str = "T3";
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `new_path_level`
[INFO] [stdout]  --> src/type_checker.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn new_path_level(path: &Path, pos: u64) -> Path {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_unification_error`
[INFO] [stdout]   --> src/type_checker.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn make_unification_error(i: String) -> Result<(), ErrorInfo> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `unifier`
[INFO] [stdout]   --> src/type_checker.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn unifier(ty1: &TypeExpr, ty2: &TypeExpr) -> Result<(), ErrorInfo> {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `literal_infer`
[INFO] [stdout]   --> src/type_checker.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn literal_infer(lit: Literal) -> TypeExpr {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `expr_infer`
[INFO] [stdout]   --> src/type_checker.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn expr_infer(context: &Context, expr: Expr, path: Path) -> CompileResult<TypeExpr> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] [stderr] error: failed to check after updating to 2021
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `cargo check --frozen --all --all-targets --message-format=json` (exit status: 101)
[INFO] running `Command { std: "docker" "inspect" "1b9e07e59907b4af81f436e5ea6a70a7d31bcfa100f11174599bbcc1b0197eae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b9e07e59907b4af81f436e5ea6a70a7d31bcfa100f11174599bbcc1b0197eae", kill_on_drop: false }`
[INFO] [stdout] 1b9e07e59907b4af81f436e5ea6a70a7d31bcfa100f11174599bbcc1b0197eae