[FIR] Report UNSUPPORTED for default value in function type

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/CommonDeclarationCheckers.kt

@@ -163,4 +163,9 @@ object CommonDeclarationCheckers : DeclarationCheckers() {
         get() = setOf(
             FirEnumCompanionInEnumConstructorCallChecker,
         )
+
+    override val valueParameterCheckers: Set<FirValueParameterChecker>
+        get() = setOf(
+            FirUnsupportedDefaultValueInFunctionTypeChecker
+        )
 }

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirUnsupportedDefaultValueInFunctionTypeChecker.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.fir.analysis.checkers.declaration
+
+import org.jetbrains.kotlin.diagnostics.DiagnosticReporter
+import org.jetbrains.kotlin.diagnostics.reportOn
+import org.jetbrains.kotlin.fir.analysis.checkers.context.CheckerContext
+import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors
+import org.jetbrains.kotlin.fir.declarations.FirValueParameter
+import org.jetbrains.kotlin.fir.resolve.diagnostics.ConeUnsupportedDefaultValueInFunctionType
+import org.jetbrains.kotlin.fir.types.FirErrorTypeRef
+
+object FirUnsupportedDefaultValueInFunctionTypeChecker : FirValueParameterChecker() {
+    override fun check(declaration: FirValueParameter, context: CheckerContext, reporter: DiagnosticReporter) {
+        val diagnostic = ((declaration.defaultValue?.typeRef as? FirErrorTypeRef)?.diagnostic as? ConeUnsupportedDefaultValueInFunctionType)
+        if (diagnostic != null) {
+            reporter.reportOn(diagnostic.source, FirErrors.UNSUPPORTED, diagnostic.reason, context)
+        }
+    }
+}