diff --git a/compiler/fir/checkers/checkers-component-generator/src/org/jetbrains/kotlin/fir/checkers/generator/Main.kt b/compiler/fir/checkers/checkers-component-generator/src/org/jetbrains/kotlin/fir/checkers/generator/Main.kt
index 5aa202e41f5..503cc41b05c 100644
--- a/compiler/fir/checkers/checkers-component-generator/src/org/jetbrains/kotlin/fir/checkers/generator/Main.kt
+++ b/compiler/fir/checkers/checkers-component-generator/src/org/jetbrains/kotlin/fir/checkers/generator/Main.kt
@@ -29,6 +29,7 @@ fun main(args: Array<String>) {
         alias<FirStatement>("BasicExpressionChecker")
         alias<FirQualifiedAccess>("QualifiedAccessChecker")
         alias<FirQualifiedAccessExpression>("QualifiedAccessExpressionChecker")
+        alias<FirCall>("CallChecker")
         alias<FirFunctionCall>("FunctionCallChecker")
         alias<FirVariableAssignment>("VariableAssignmentChecker")
         alias<FirTryExpression>("TryExpressionChecker")
diff --git a/compiler/fir/checkers/checkers-component-generator/src/org/jetbrains/kotlin/fir/checkers/generator/diagnostics/FirDiagnosticsList.kt b/compiler/fir/checkers/checkers-component-generator/src/org/jetbrains/kotlin/fir/checkers/generator/diagnostics/FirDiagnosticsList.kt
index bc017d8277e..ab4c5bbdf64 100644
--- a/compiler/fir/checkers/checkers-component-generator/src/org/jetbrains/kotlin/fir/checkers/generator/diagnostics/FirDiagnosticsList.kt
+++ b/compiler/fir/checkers/checkers-component-generator/src/org/jetbrains/kotlin/fir/checkers/generator/diagnostics/FirDiagnosticsList.kt
@@ -444,6 +444,7 @@ object DIAGNOSTICS_LIST : DiagnosticList("FirErrors") {
         val SPREAD_OF_NULLABLE by error<PsiElement>(PositioningStrategy.SPREAD_OPERATOR)
 
         val ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_FUNCTION by deprecationError<KtExpression>(LanguageFeature.ProhibitAssigningSingleElementsToVarargsInNamedForm)
+        val ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_ANNOTATION by deprecationError<KtExpression>(LanguageFeature.ProhibitAssigningSingleElementsToVarargsInNamedForm)
     }
 
     val AMBIGUITY by object : DiagnosticGroup("Ambiguity") {
diff --git a/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/checkers/expression/ComposedExpressionCheckers.kt b/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/checkers/expression/ComposedExpressionCheckers.kt
index 36a9bd54c81..f6f36620b3b 100644
--- a/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/checkers/expression/ComposedExpressionCheckers.kt
+++ b/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/checkers/expression/ComposedExpressionCheckers.kt
@@ -19,6 +19,8 @@ class ComposedExpressionCheckers : ExpressionCheckers() {
         get() = _qualifiedAccessCheckers
     override val qualifiedAccessExpressionCheckers: Set<FirQualifiedAccessExpressionChecker>
         get() = _qualifiedAccessExpressionCheckers
+    override val callCheckers: Set<FirCallChecker>
+        get() = _callCheckers
     override val functionCallCheckers: Set<FirFunctionCallChecker>
         get() = _functionCallCheckers
     override val variableAssignmentCheckers: Set<FirVariableAssignmentChecker>
@@ -73,6 +75,7 @@ class ComposedExpressionCheckers : ExpressionCheckers() {
     private val _basicExpressionCheckers: MutableSet<FirBasicExpressionChecker> = mutableSetOf()
     private val _qualifiedAccessCheckers: MutableSet<FirQualifiedAccessChecker> = mutableSetOf()
     private val _qualifiedAccessExpressionCheckers: MutableSet<FirQualifiedAccessExpressionChecker> = mutableSetOf()
+    private val _callCheckers: MutableSet<FirCallChecker> = mutableSetOf()
     private val _functionCallCheckers: MutableSet<FirFunctionCallChecker> = mutableSetOf()
     private val _variableAssignmentCheckers: MutableSet<FirVariableAssignmentChecker> = mutableSetOf()
     private val _tryExpressionCheckers: MutableSet<FirTryExpressionChecker> = mutableSetOf()
@@ -104,6 +107,7 @@ class ComposedExpressionCheckers : ExpressionCheckers() {
         _basicExpressionCheckers += checkers.basicExpressionCheckers
         _qualifiedAccessCheckers += checkers.qualifiedAccessCheckers
         _qualifiedAccessExpressionCheckers += checkers.qualifiedAccessExpressionCheckers
+        _callCheckers += checkers.callCheckers
         _functionCallCheckers += checkers.functionCallCheckers
         _variableAssignmentCheckers += checkers.variableAssignmentCheckers
         _tryExpressionCheckers += checkers.tryExpressionCheckers
diff --git a/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/checkers/expression/ExpressionCheckers.kt b/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/checkers/expression/ExpressionCheckers.kt
index 73fdb57468e..360d7f1dcff 100644
--- a/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/checkers/expression/ExpressionCheckers.kt
+++ b/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/checkers/expression/ExpressionCheckers.kt
@@ -20,6 +20,7 @@ abstract class ExpressionCheckers {
     open val basicExpressionCheckers: Set<FirBasicExpressionChecker> = emptySet()
     open val qualifiedAccessCheckers: Set<FirQualifiedAccessChecker> = emptySet()
     open val qualifiedAccessExpressionCheckers: Set<FirQualifiedAccessExpressionChecker> = emptySet()
+    open val callCheckers: Set<FirCallChecker> = emptySet()
     open val functionCallCheckers: Set<FirFunctionCallChecker> = emptySet()
     open val variableAssignmentCheckers: Set<FirVariableAssignmentChecker> = emptySet()
     open val tryExpressionCheckers: Set<FirTryExpressionChecker> = emptySet()
@@ -49,7 +50,8 @@ abstract class ExpressionCheckers {
     @CheckersComponentInternal internal val allBasicExpressionCheckers: Set<FirBasicExpressionChecker> by lazy { basicExpressionCheckers }
     @CheckersComponentInternal internal val allQualifiedAccessCheckers: Set<FirQualifiedAccessChecker> by lazy { qualifiedAccessCheckers + basicExpressionCheckers }
     @CheckersComponentInternal internal val allQualifiedAccessExpressionCheckers: Set<FirQualifiedAccessExpressionChecker> by lazy { qualifiedAccessExpressionCheckers + basicExpressionCheckers + qualifiedAccessCheckers }
-    @CheckersComponentInternal internal val allFunctionCallCheckers: Set<FirFunctionCallChecker> by lazy { functionCallCheckers + qualifiedAccessExpressionCheckers + basicExpressionCheckers + qualifiedAccessCheckers }
+    @CheckersComponentInternal internal val allCallCheckers: Set<FirCallChecker> by lazy { callCheckers + basicExpressionCheckers }
+    @CheckersComponentInternal internal val allFunctionCallCheckers: Set<FirFunctionCallChecker> by lazy { functionCallCheckers + qualifiedAccessExpressionCheckers + basicExpressionCheckers + qualifiedAccessCheckers + callCheckers }
     @CheckersComponentInternal internal val allVariableAssignmentCheckers: Set<FirVariableAssignmentChecker> by lazy { variableAssignmentCheckers + qualifiedAccessCheckers + basicExpressionCheckers }
     @CheckersComponentInternal internal val allTryExpressionCheckers: Set<FirTryExpressionChecker> by lazy { tryExpressionCheckers + basicExpressionCheckers }
     @CheckersComponentInternal internal val allWhenExpressionCheckers: Set<FirWhenExpressionChecker> by lazy { whenExpressionCheckers + basicExpressionCheckers }
@@ -58,20 +60,20 @@ abstract class ExpressionCheckers {
     @CheckersComponentInternal internal val allLogicExpressionCheckers: Set<FirLogicExpressionChecker> by lazy { logicExpressionCheckers + basicExpressionCheckers }
     @CheckersComponentInternal internal val allReturnExpressionCheckers: Set<FirReturnExpressionChecker> by lazy { returnExpressionCheckers + basicExpressionCheckers }
     @CheckersComponentInternal internal val allBlockCheckers: Set<FirBlockChecker> by lazy { blockCheckers + basicExpressionCheckers }
-    @CheckersComponentInternal internal val allAnnotationCallCheckers: Set<FirAnnotationCallChecker> by lazy { annotationCallCheckers + basicExpressionCheckers }
-    @CheckersComponentInternal internal val allCheckNotNullCallCheckers: Set<FirCheckNotNullCallChecker> by lazy { checkNotNullCallCheckers + basicExpressionCheckers }
+    @CheckersComponentInternal internal val allAnnotationCallCheckers: Set<FirAnnotationCallChecker> by lazy { annotationCallCheckers + basicExpressionCheckers + callCheckers }
+    @CheckersComponentInternal internal val allCheckNotNullCallCheckers: Set<FirCheckNotNullCallChecker> by lazy { checkNotNullCallCheckers + basicExpressionCheckers + callCheckers }
     @CheckersComponentInternal internal val allElvisExpressionCheckers: Set<FirElvisExpressionChecker> by lazy { elvisExpressionCheckers + basicExpressionCheckers }
-    @CheckersComponentInternal internal val allGetClassCallCheckers: Set<FirGetClassCallChecker> by lazy { getClassCallCheckers + basicExpressionCheckers }
+    @CheckersComponentInternal internal val allGetClassCallCheckers: Set<FirGetClassCallChecker> by lazy { getClassCallCheckers + basicExpressionCheckers + callCheckers }
     @CheckersComponentInternal internal val allSafeCallExpressionCheckers: Set<FirSafeCallExpressionChecker> by lazy { safeCallExpressionCheckers + basicExpressionCheckers }
-    @CheckersComponentInternal internal val allEqualityOperatorCallCheckers: Set<FirEqualityOperatorCallChecker> by lazy { equalityOperatorCallCheckers + basicExpressionCheckers }
-    @CheckersComponentInternal internal val allStringConcatenationCallCheckers: Set<FirStringConcatenationCallChecker> by lazy { stringConcatenationCallCheckers + basicExpressionCheckers }
-    @CheckersComponentInternal internal val allTypeOperatorCallCheckers: Set<FirTypeOperatorCallChecker> by lazy { typeOperatorCallCheckers + basicExpressionCheckers }
+    @CheckersComponentInternal internal val allEqualityOperatorCallCheckers: Set<FirEqualityOperatorCallChecker> by lazy { equalityOperatorCallCheckers + basicExpressionCheckers + callCheckers }
+    @CheckersComponentInternal internal val allStringConcatenationCallCheckers: Set<FirStringConcatenationCallChecker> by lazy { stringConcatenationCallCheckers + callCheckers + basicExpressionCheckers }
+    @CheckersComponentInternal internal val allTypeOperatorCallCheckers: Set<FirTypeOperatorCallChecker> by lazy { typeOperatorCallCheckers + basicExpressionCheckers + callCheckers }
     @CheckersComponentInternal internal val allResolvedQualifierCheckers: Set<FirResolvedQualifierChecker> by lazy { resolvedQualifierCheckers + basicExpressionCheckers }
     @CheckersComponentInternal internal val allConstExpressionCheckers: Set<FirConstExpressionChecker> by lazy { constExpressionCheckers + basicExpressionCheckers }
     @CheckersComponentInternal internal val allCallableReferenceAccessCheckers: Set<FirCallableReferenceAccessChecker> by lazy { callableReferenceAccessCheckers + qualifiedAccessExpressionCheckers + basicExpressionCheckers + qualifiedAccessCheckers }
     @CheckersComponentInternal internal val allThisReceiverExpressionCheckers: Set<FirThisReceiverExpressionChecker> by lazy { thisReceiverExpressionCheckers + qualifiedAccessExpressionCheckers + basicExpressionCheckers + qualifiedAccessCheckers }
     @CheckersComponentInternal internal val allWhileLoopCheckers: Set<FirWhileLoopChecker> by lazy { whileLoopCheckers + loopExpressionCheckers + basicExpressionCheckers }
     @CheckersComponentInternal internal val allDoWhileLoopCheckers: Set<FirDoWhileLoopChecker> by lazy { doWhileLoopCheckers + loopExpressionCheckers + basicExpressionCheckers }
-    @CheckersComponentInternal internal val allArrayOfCallCheckers: Set<FirArrayOfCallChecker> by lazy { arrayOfCallCheckers + basicExpressionCheckers }
+    @CheckersComponentInternal internal val allArrayOfCallCheckers: Set<FirArrayOfCallChecker> by lazy { arrayOfCallCheckers + basicExpressionCheckers + callCheckers }
     @CheckersComponentInternal internal val allClassReferenceExpressionCheckers: Set<FirClassReferenceExpressionChecker> by lazy { classReferenceExpressionCheckers + basicExpressionCheckers }
 }
diff --git a/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/checkers/expression/FirExpressionCheckerAliases.kt b/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/checkers/expression/FirExpressionCheckerAliases.kt
index c687cd5bb4f..ed76ddb915f 100644
--- a/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/checkers/expression/FirExpressionCheckerAliases.kt
+++ b/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/checkers/expression/FirExpressionCheckerAliases.kt
@@ -14,6 +14,7 @@ import org.jetbrains.kotlin.fir.expressions.FirAnnotationCall
 import org.jetbrains.kotlin.fir.expressions.FirArrayOfCall
 import org.jetbrains.kotlin.fir.expressions.FirBinaryLogicExpression
 import org.jetbrains.kotlin.fir.expressions.FirBlock
+import org.jetbrains.kotlin.fir.expressions.FirCall
 import org.jetbrains.kotlin.fir.expressions.FirCallableReferenceAccess
 import org.jetbrains.kotlin.fir.expressions.FirCheckNotNullCall
 import org.jetbrains.kotlin.fir.expressions.FirClassReferenceExpression
@@ -42,6 +43,7 @@ import org.jetbrains.kotlin.fir.expressions.FirWhileLoop
 typealias FirBasicExpressionChecker = FirExpressionChecker<FirStatement>
 typealias FirQualifiedAccessChecker = FirExpressionChecker<FirQualifiedAccess>
 typealias FirQualifiedAccessExpressionChecker = FirExpressionChecker<FirQualifiedAccessExpression>
+typealias FirCallChecker = FirExpressionChecker<FirCall>
 typealias FirFunctionCallChecker = FirExpressionChecker<FirFunctionCall>
 typealias FirVariableAssignmentChecker = FirExpressionChecker<FirVariableAssignment>
 typealias FirTryExpressionChecker = FirExpressionChecker<FirTryExpression>
diff --git a/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/diagnostics/FirErrors.kt b/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/diagnostics/FirErrors.kt
index 351d894a139..578037e08d3 100644
--- a/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/diagnostics/FirErrors.kt
+++ b/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/diagnostics/FirErrors.kt
@@ -307,6 +307,7 @@ object FirErrors {
     val NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER by error1<KtElement, String>()
     val SPREAD_OF_NULLABLE by error0<PsiElement>(SourceElementPositioningStrategies.SPREAD_OPERATOR)
     val ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_FUNCTION by deprecationError0<KtExpression>(ProhibitAssigningSingleElementsToVarargsInNamedForm)
+    val ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_ANNOTATION by deprecationError0<KtExpression>(ProhibitAssigningSingleElementsToVarargsInNamedForm)
 
     // Ambiguity
     val OVERLOAD_RESOLUTION_AMBIGUITY by error1<PsiElement, Collection<FirBasedSymbol<*>>>(SourceElementPositioningStrategies.REFERENCE_BY_QUALIFIED)
diff --git a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/CommonExpressionCheckers.kt b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/CommonExpressionCheckers.kt
index 07e8bbfbf4f..a1ed6ea7409 100644
--- a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/CommonExpressionCheckers.kt
+++ b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/CommonExpressionCheckers.kt
@@ -45,6 +45,11 @@ object CommonExpressionCheckers : ExpressionCheckers() {
             FirSuspendCallChecker,
         )
 
+    override val callCheckers: Set<FirCallChecker>
+        get() = setOf(
+            FirNamedVarargChecker,
+        )
+
     override val functionCallCheckers: Set<FirFunctionCallChecker>
         get() = setOf(
             FirConventionFunctionCallChecker,
diff --git a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/expression/FirDeprecationChecker.kt b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/expression/FirDeprecationChecker.kt
index 378074f10c5..5bfdb975156 100644
--- a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/expression/FirDeprecationChecker.kt
+++ b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/expression/FirDeprecationChecker.kt
@@ -32,7 +32,7 @@ object FirDeprecationChecker : FirBasicExpressionChecker() {
 
     override fun check(expression: FirStatement, context: CheckerContext, reporter: DiagnosticReporter) {
         if (!allowedSourceKinds.contains(expression.source?.kind)) return
-        if (expression is FirAnnotationCall) return //checked by FirDeprecatedTypeChecker
+        if (expression is FirAnnotationCall || expression is FirDelegatedConstructorCall) return //checked by FirDeprecatedTypeChecker
         val resolvable = expression as? FirResolvable ?: return
         val reference = resolvable.calleeReference as? FirResolvedNamedReference ?: return
         val referencedSymbol = reference.resolvedSymbol
diff --git a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/expression/FirNamedVarargChecker.kt b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/expression/FirNamedVarargChecker.kt
index 2fd7d6e7a56..3c31f39a12a 100644
--- a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/expression/FirNamedVarargChecker.kt
+++ b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/expression/FirNamedVarargChecker.kt
@@ -20,10 +20,17 @@ import org.jetbrains.kotlin.fir.languageVersionSettings
 import org.jetbrains.kotlin.fir.types.FirErrorTypeRef
 import org.jetbrains.kotlin.fir.types.isArrayType
 
-object FirNamedVarargChecker : FirFunctionCallChecker() {
-    override fun check(expression: FirFunctionCall, context: CheckerContext, reporter: DiagnosticReporter) {
+object FirNamedVarargChecker : FirCallChecker() {
+    override fun check(expression: FirCall, context: CheckerContext, reporter: DiagnosticReporter) {
+        if (expression !is FirFunctionCall && expression !is FirAnnotationCall && expression !is FirDelegatedConstructorCall) return
+        val isAnnotation = expression is FirAnnotationCall
+        val errorFactory =
+            if (isAnnotation) FirErrors.ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_ANNOTATION
+            else FirErrors.ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_FUNCTION
+
         val allowAssignArray = context.session.languageVersionSettings.supportsFeature(
-            LanguageFeature.AllowAssigningArrayElementsToVarargsInNamedFormForFunctions
+            if (isAnnotation) LanguageFeature.AssigningArraysToVarargsInNamedFormInAnnotations
+            else LanguageFeature.AllowAssigningArrayElementsToVarargsInNamedFormForFunctions
         )
 
         fun checkArgument(argument: FirExpression) {
@@ -34,7 +41,7 @@ object FirNamedVarargChecker : FirFunctionCallChecker() {
             if (argument.expression is FirArrayOfCall) return
             if (allowAssignArray && typeRef.isArrayType) return
 
-            reporter.reportOn(argument.expression.source, FirErrors.ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_FUNCTION, context)
+            reporter.reportOn(argument.expression.source, errorFactory, context)
         }
 
         val argumentMap = expression.argumentMapping ?: return
diff --git a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/collectors/components/ExpressionCheckersDiagnosticComponent.kt b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/collectors/components/ExpressionCheckersDiagnosticComponent.kt
index 14d7ea30cf1..514b6aca56c 100644
--- a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/collectors/components/ExpressionCheckersDiagnosticComponent.kt
+++ b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/collectors/components/ExpressionCheckersDiagnosticComponent.kt
@@ -12,7 +12,6 @@ import org.jetbrains.kotlin.fir.analysis.checkers.expression.ExpressionCheckers
 import org.jetbrains.kotlin.fir.analysis.checkers.expression.FirExpressionChecker
 import org.jetbrains.kotlin.fir.analysis.checkersComponent
 import org.jetbrains.kotlin.fir.analysis.diagnostics.DiagnosticReporter
-import org.jetbrains.kotlin.fir.declarations.FirAnonymousFunction
 import org.jetbrains.kotlin.fir.expressions.*
 
 @OptIn(CheckersComponentInternal::class)
@@ -137,6 +136,10 @@ class ExpressionCheckersDiagnosticComponent(
         checkers.allBlockCheckers.check(block, data, reporter)
     }
 
+    override fun visitDelegatedConstructorCall(delegatedConstructorCall: FirDelegatedConstructorCall, data: CheckerContext) {
+        checkers.allCallCheckers.check(delegatedConstructorCall, data, reporter)
+    }
+
     private fun <E : FirStatement> Collection<FirExpressionChecker<E>>.check(
         expression: E,
         context: CheckerContext,
diff --git a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/diagnostics/FirDefaultErrorMessages.kt b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/diagnostics/FirDefaultErrorMessages.kt
index 5139fc2468f..c6bdab2ec3c 100644
--- a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/diagnostics/FirDefaultErrorMessages.kt
+++ b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/diagnostics/FirDefaultErrorMessages.kt
@@ -65,6 +65,8 @@ import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors.ARGUMENT_TYPE_MIS
 import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors.ARRAY_EQUALITY_OPERATOR_CAN_BE_REPLACED_WITH_EQUALS
 import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors.ASSIGNED_VALUE_IS_NEVER_READ
 import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors.ASSIGNMENT_OPERATOR_SHOULD_RETURN_UNIT
+import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors.ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_ANNOTATION
+import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors.ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_FUNCTION
 import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors.ASSIGNMENT_TYPE_MISMATCH
 import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors.ASSIGN_OPERATOR_AMBIGUITY
 import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors.BACKING_FIELD_IN_INTERFACE
@@ -759,7 +761,8 @@ class FirDefaultErrorMessages {
             map.put(NAMED_PARAMETER_NOT_FOUND, "Cannot find a parameter with this name: {0}", TO_STRING)
             map.put(MANY_LAMBDA_EXPRESSION_ARGUMENTS, "Only one lambda expression is allowed outside a parenthesized argument list")
             map.put(SPREAD_OF_NULLABLE, "The spread operator (*foo) may not be applied to an argument of nullable type")
-            map.put(SPREAD_OF_NULLABLE, "Assigning single elements to varargs in named form is forbidden")
+            map.put(ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_FUNCTION, "Assigning single elements to varargs in named form is forbidden")
+            map.put(ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_ANNOTATION, "Assigning single elements to varargs in named form is forbidden")
 
             map.put(TYPE_MISMATCH, "Type mismatch: inferred type is {1} but {0} was expected", TO_STRING, TO_STRING)
             map.put(THROWABLE_TYPE_MISMATCH, "Throwable type mismatch: actual type is {0}", TO_STRING)
diff --git a/compiler/testData/diagnostics/tests/varargs/assignArrayToVararagInNamedForm_1_3.fir.kt b/compiler/testData/diagnostics/tests/varargs/assignArrayToVararagInNamedForm_1_3.fir.kt
index d1070c5cec8..1f7b595fc64 100644
--- a/compiler/testData/diagnostics/tests/varargs/assignArrayToVararagInNamedForm_1_3.fir.kt
+++ b/compiler/testData/diagnostics/tests/varargs/assignArrayToVararagInNamedForm_1_3.fir.kt
@@ -30,6 +30,6 @@ fun test_ann(s: String, arr: Array<String>) {
 
     @Ann("", x = 1)
     foo()
-    @Ann(s = "", x = 1)
+    @Ann(s = <!ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_ANNOTATION_ERROR!>""<!>, x = 1)
     foo()
 }
diff --git a/compiler/testData/diagnostics/tests/varargs/assignArrayToVararagInNamedForm_1_4.fir.kt b/compiler/testData/diagnostics/tests/varargs/assignArrayToVararagInNamedForm_1_4.fir.kt
index 2fac9bc8610..0d83adc756d 100644
--- a/compiler/testData/diagnostics/tests/varargs/assignArrayToVararagInNamedForm_1_4.fir.kt
+++ b/compiler/testData/diagnostics/tests/varargs/assignArrayToVararagInNamedForm_1_4.fir.kt
@@ -30,6 +30,6 @@ fun test_ann(s: String, arr: Array<String>) {
 
     @Ann("", x = 1)
     foo()
-    @Ann(s = "", x = 1)
+    @Ann(s = <!ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_ANNOTATION_ERROR!>""<!>, x = 1)
     foo()
 }
diff --git a/compiler/testData/diagnostics/tests/varargs/assigningSingleElementsInNamedFormAnnDeprecation_after.fir.kt b/compiler/testData/diagnostics/tests/varargs/assigningSingleElementsInNamedFormAnnDeprecation_after.fir.kt
index e9dd8453b09..3c255f49e0a 100644
--- a/compiler/testData/diagnostics/tests/varargs/assigningSingleElementsInNamedFormAnnDeprecation_after.fir.kt
+++ b/compiler/testData/diagnostics/tests/varargs/assigningSingleElementsInNamedFormAnnDeprecation_after.fir.kt
@@ -11,7 +11,7 @@
 
 annotation class Ann(vararg val s: String)
 
-@Ann(s = "value")
+@Ann(s = <!ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_ANNOTATION_ERROR!>"value"<!>)
 fun test1() {}
 
 @Ann(s = *arrayOf("value"))
@@ -20,7 +20,7 @@ fun test2() {}
 @Ann(s = *["value"])
 fun test3() {}
 
-@JavaAnn(value = "value")
+@JavaAnn(value = <!ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_ANNOTATION_ERROR!>"value"<!>)
 fun test4() {}
 
 @JavaAnn("value", path = arrayOf("path"))
diff --git a/compiler/testData/diagnostics/tests/varargs/assigningSingleElementsInNamedFormAnnDeprecation_before.fir.kt b/compiler/testData/diagnostics/tests/varargs/assigningSingleElementsInNamedFormAnnDeprecation_before.fir.kt
index 628c0b4dfb4..819fcc96de0 100644
--- a/compiler/testData/diagnostics/tests/varargs/assigningSingleElementsInNamedFormAnnDeprecation_before.fir.kt
+++ b/compiler/testData/diagnostics/tests/varargs/assigningSingleElementsInNamedFormAnnDeprecation_before.fir.kt
@@ -11,7 +11,7 @@
 
 annotation class Ann(vararg val s: String)
 
-@Ann(s = "value")
+@Ann(s = <!ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_ANNOTATION_WARNING!>"value"<!>)
 fun test1() {}
 
 @Ann(s = *arrayOf("value"))
@@ -20,7 +20,7 @@ fun test2() {}
 @Ann(s = *["value"])
 fun test3() {}
 
-@JavaAnn(value = "value")
+@JavaAnn(value = <!ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_ANNOTATION_WARNING!>"value"<!>)
 fun test4() {}
 
 @JavaAnn("value", path = arrayOf("path"))
diff --git a/compiler/testData/diagnostics/tests/varargs/assigningSingleElementsInNamedFormFunDeprecation_after.fir.kt b/compiler/testData/diagnostics/tests/varargs/assigningSingleElementsInNamedFormFunDeprecation_after.fir.kt
index 15cc3183670..e46b4cb2a32 100644
--- a/compiler/testData/diagnostics/tests/varargs/assigningSingleElementsInNamedFormFunDeprecation_after.fir.kt
+++ b/compiler/testData/diagnostics/tests/varargs/assigningSingleElementsInNamedFormFunDeprecation_after.fir.kt
@@ -15,9 +15,9 @@ fun test(i: IntArray) {
 
     Cls(p = <!ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_FUNCTION_ERROR!>1<!>)
 
-    class Sub : Cls(p = 1)
+    class Sub : Cls(p = <!ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_FUNCTION_ERROR!>1<!>)
 
-    val c = object : Cls(p = 1) {}
+    val c = object : Cls(p = <!ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_FUNCTION_ERROR!>1<!>) {}
 
     foo(s = *intArrayOf(elements = <!ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_FUNCTION_ERROR!>1<!>))
 }
diff --git a/compiler/testData/diagnostics/tests/varargs/assigningSingleElementsInNamedFormFunDeprecation_before.fir.kt b/compiler/testData/diagnostics/tests/varargs/assigningSingleElementsInNamedFormFunDeprecation_before.fir.kt
index 7185888487f..5da1ffdf4b1 100644
--- a/compiler/testData/diagnostics/tests/varargs/assigningSingleElementsInNamedFormFunDeprecation_before.fir.kt
+++ b/compiler/testData/diagnostics/tests/varargs/assigningSingleElementsInNamedFormFunDeprecation_before.fir.kt
@@ -15,9 +15,9 @@ fun test(i: IntArray) {
 
     Cls(p = <!ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_FUNCTION_WARNING!>1<!>)
 
-    class Sub : Cls(p = 1)
+    class Sub : Cls(p = <!ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_FUNCTION_WARNING!>1<!>)
 
-    val c = object : Cls(p = 1) {}
+    val c = object : Cls(p = <!ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_FUNCTION_WARNING!>1<!>) {}
 
     foo(s = *intArrayOf(elements = <!ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_FUNCTION_WARNING!>1<!>))
 }
diff --git a/compiler/testData/diagnostics/tests/varargs/noAssigningArraysToVarargsFeature.fir.kt b/compiler/testData/diagnostics/tests/varargs/noAssigningArraysToVarargsFeature.fir.kt
index 1181825a0d3..cdf7a12dd5a 100644
--- a/compiler/testData/diagnostics/tests/varargs/noAssigningArraysToVarargsFeature.fir.kt
+++ b/compiler/testData/diagnostics/tests/varargs/noAssigningArraysToVarargsFeature.fir.kt
@@ -42,7 +42,7 @@ fun foo2() {}
 
 fun foo(vararg i: Int) {}
 
-@Ann(s = "value")
+@Ann(s = <!ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_ANNOTATION_ERROR!>"value"<!>)
 fun dep1() {
     foo(i = <!ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_FUNCTION_ERROR!>1<!>)
 }
diff --git a/compiler/testData/diagnostics/tests/varargs/prohibitAssigningSingleElementsInNamedForm.fir.kt b/compiler/testData/diagnostics/tests/varargs/prohibitAssigningSingleElementsInNamedForm.fir.kt
index 7d2b42c741b..4aea436cf72 100644
--- a/compiler/testData/diagnostics/tests/varargs/prohibitAssigningSingleElementsInNamedForm.fir.kt
+++ b/compiler/testData/diagnostics/tests/varargs/prohibitAssigningSingleElementsInNamedForm.fir.kt
@@ -4,7 +4,7 @@
 annotation class Anno1(vararg val s: String)
 annotation class Anno2(vararg val i: Int)
 
-@Anno1(s = "foo")
+@Anno1(s = <!ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_ANNOTATION_ERROR!>"foo"<!>)
 @Anno2(i = *intArrayOf(1))
 fun f1() {}
 
diff --git a/idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDataClassConverters.kt b/idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDataClassConverters.kt
index 997e0cc8bfe..c2edaa4c62e 100644
--- a/idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDataClassConverters.kt
+++ b/idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDataClassConverters.kt
@@ -1334,14 +1334,24 @@ internal val KT_DIAGNOSTIC_CONVERTER = KtDiagnosticConverterBuilder.buildConvert
     }
     add(FirErrors.ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_FUNCTION.errorFactory) { firDiagnostic ->
         AssigningSingleElementToVarargInNamedFormFunctionErrorImpl(
-            firSymbolBuilder.typeBuilder.buildKtType(firDiagnostic.a),
             firDiagnostic as FirPsiDiagnostic,
             token,
         )
     }
     add(FirErrors.ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_FUNCTION.warningFactory) { firDiagnostic ->
         AssigningSingleElementToVarargInNamedFormFunctionWarningImpl(
-            firSymbolBuilder.typeBuilder.buildKtType(firDiagnostic.a),
+            firDiagnostic as FirPsiDiagnostic,
+            token,
+        )
+    }
+    add(FirErrors.ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_ANNOTATION.errorFactory) { firDiagnostic ->
+        AssigningSingleElementToVarargInNamedFormAnnotationErrorImpl(
+            firDiagnostic as FirPsiDiagnostic,
+            token,
+        )
+    }
+    add(FirErrors.ASSIGNING_SINGLE_ELEMENT_TO_VARARG_IN_NAMED_FORM_ANNOTATION.warningFactory) { firDiagnostic ->
+        AssigningSingleElementToVarargInNamedFormAnnotationWarningImpl(
             firDiagnostic as FirPsiDiagnostic,
             token,
         )
diff --git a/idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDiagnostics.kt b/idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDiagnostics.kt
index ecad763f877..e9b86b74f0f 100644
--- a/idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDiagnostics.kt
+++ b/idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDiagnostics.kt
@@ -958,12 +958,18 @@ sealed class KtFirDiagnostic<PSI : PsiElement> : KtDiagnosticWithPsi<PSI> {
 
     abstract class AssigningSingleElementToVarargInNamedFormFunctionError : KtFirDiagnostic<KtExpression>() {
         override val diagnosticClass get() = AssigningSingleElementToVarargInNamedFormFunctionError::class
-        abstract val type: KtType
     }
 
     abstract class AssigningSingleElementToVarargInNamedFormFunctionWarning : KtFirDiagnostic<KtExpression>() {
         override val diagnosticClass get() = AssigningSingleElementToVarargInNamedFormFunctionWarning::class
-        abstract val type: KtType
+    }
+
+    abstract class AssigningSingleElementToVarargInNamedFormAnnotationError : KtFirDiagnostic<KtExpression>() {
+        override val diagnosticClass get() = AssigningSingleElementToVarargInNamedFormAnnotationError::class
+    }
+
+    abstract class AssigningSingleElementToVarargInNamedFormAnnotationWarning : KtFirDiagnostic<KtExpression>() {
+        override val diagnosticClass get() = AssigningSingleElementToVarargInNamedFormAnnotationWarning::class
     }
 
     abstract class OverloadResolutionAmbiguity : KtFirDiagnostic<PsiElement>() {
diff --git a/idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDiagnosticsImpl.kt b/idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDiagnosticsImpl.kt
index eadd0d72fcf..758c125235b 100644
--- a/idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDiagnosticsImpl.kt
+++ b/idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDiagnosticsImpl.kt
@@ -1528,7 +1528,6 @@ internal class SpreadOfNullableImpl(
 }
 
 internal class AssigningSingleElementToVarargInNamedFormFunctionErrorImpl(
-    override val type: KtType,
     firDiagnostic: FirPsiDiagnostic,
     override val token: ValidityToken,
 ) : KtFirDiagnostic.AssigningSingleElementToVarargInNamedFormFunctionError(), KtAbstractFirDiagnostic<KtExpression> {
@@ -1536,13 +1535,26 @@ internal class AssigningSingleElementToVarargInNamedFormFunctionErrorImpl(
 }
 
 internal class AssigningSingleElementToVarargInNamedFormFunctionWarningImpl(
-    override val type: KtType,
     firDiagnostic: FirPsiDiagnostic,
     override val token: ValidityToken,
 ) : KtFirDiagnostic.AssigningSingleElementToVarargInNamedFormFunctionWarning(), KtAbstractFirDiagnostic<KtExpression> {
     override val firDiagnostic: FirPsiDiagnostic by weakRef(firDiagnostic)
 }
 
+internal class AssigningSingleElementToVarargInNamedFormAnnotationErrorImpl(
+    firDiagnostic: FirPsiDiagnostic,
+    override val token: ValidityToken,
+) : KtFirDiagnostic.AssigningSingleElementToVarargInNamedFormAnnotationError(), KtAbstractFirDiagnostic<KtExpression> {
+    override val firDiagnostic: FirPsiDiagnostic by weakRef(firDiagnostic)
+}
+
+internal class AssigningSingleElementToVarargInNamedFormAnnotationWarningImpl(
+    firDiagnostic: FirPsiDiagnostic,
+    override val token: ValidityToken,
+) : KtFirDiagnostic.AssigningSingleElementToVarargInNamedFormAnnotationWarning(), KtAbstractFirDiagnostic<KtExpression> {
+    override val firDiagnostic: FirPsiDiagnostic by weakRef(firDiagnostic)
+}
+
 internal class OverloadResolutionAmbiguityImpl(
     override val candidates: List<KtSymbol>,
     firDiagnostic: FirPsiDiagnostic,