diff --git a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java
index 79364c10df4..56b9c23c588 100644
--- a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java
+++ b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java
@@ -24391,6 +24391,12 @@ public class FirOldFrontendDiagnosticsTestGenerated extends AbstractFirDiagnosti
                 runTest("compiler/testData/diagnostics/tests/sealed/inheritorInDifferentModule.kt");
             }
 
+            @Test
+            @TestMetadata("kt44316.kt")
+            public void testKt44316() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/sealed/kt44316.kt");
+            }
+
             @Test
             @TestMetadata("Local.kt")
             public void testLocal() throws Exception {
diff --git a/compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/declarations/AbstractPsiBasedDeclarationProvider.kt b/compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/declarations/AbstractPsiBasedDeclarationProvider.kt
index 3b970c0baf0..70a17de9e55 100644
--- a/compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/declarations/AbstractPsiBasedDeclarationProvider.kt
+++ b/compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/declarations/AbstractPsiBasedDeclarationProvider.kt
@@ -88,8 +88,13 @@ abstract class AbstractPsiBasedDeclarationProvider(storageManager: StorageManage
 
     internal fun toInfoString() = toString() + ": " + index().toString()
 
-    override fun getDeclarations(kindFilter: DescriptorKindFilter, nameFilter: (Name) -> Boolean): List<KtDeclaration> =
-        index().allDeclarations
+    override fun getDeclarations(kindFilter: DescriptorKindFilter, nameFilter: (Name) -> Boolean): List<KtDeclaration> {
+        val allDeclarations = index().allDeclarations
+        if (kindFilter == DescriptorKindFilter.CLASSIFIERS) {
+            return allDeclarations.filter { it is KtClassOrObject || it is KtTypeAlias }
+        }
+        return allDeclarations
+    }
 
     override fun getFunctionDeclarations(name: Name): List<KtNamedFunction> = index().functions[name.safeNameForLazyResolve()].toList()
 
diff --git a/compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/descriptors/LazyClassMemberScope.kt b/compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/descriptors/LazyClassMemberScope.kt
index a58ac3c2ca5..6cb62886d62 100644
--- a/compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/descriptors/LazyClassMemberScope.kt
+++ b/compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/descriptors/LazyClassMemberScope.kt
@@ -70,10 +70,26 @@ open class LazyClassMemberScope(
         result.toList()
     }
 
+    private val allClassifierDescriptors = storageManager.createLazyValue {
+        val result = LinkedHashSet(
+            computeDescriptorsFromDeclaredElements(
+                DescriptorKindFilter.CLASSIFIERS,
+                MemberScope.ALL_NAME_FILTER,
+                NoLookupLocation.WHEN_GET_ALL_DESCRIPTORS
+            )
+        )
+        addSyntheticCompanionObject(result, NoLookupLocation.FOR_ALREADY_TRACKED)
+        addSyntheticNestedClasses(result, NoLookupLocation.FOR_ALREADY_TRACKED)
+        result.toList()
+    }
+
     override fun getContributedDescriptors(
         kindFilter: DescriptorKindFilter,
         nameFilter: (Name) -> Boolean
-    ): Collection<DeclarationDescriptor> = allDescriptors()
+    ): Collection<DeclarationDescriptor> = when (kindFilter) {
+        DescriptorKindFilter.CLASSIFIERS -> allClassifierDescriptors()
+        else -> allDescriptors()
+    }
 
     protected open fun computeExtraDescriptors(location: LookupLocation): Collection<DeclarationDescriptor> {
         val result = ArrayList<DeclarationDescriptor>()
diff --git a/compiler/testData/diagnostics/tests/sealed/kt44316.kt b/compiler/testData/diagnostics/tests/sealed/kt44316.kt
new file mode 100644
index 00000000000..cd55b84deb6
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/sealed/kt44316.kt
@@ -0,0 +1,11 @@
+// FIR_IDENTICAL
+// KT-44316
+
+sealed class Base
+class Derived : Base()
+
+class Test<out V>(val x: Base) {
+    private val y = when (x) {
+        is Derived -> null
+    }
+}
diff --git a/compiler/testData/diagnostics/tests/sealed/kt44316.txt b/compiler/testData/diagnostics/tests/sealed/kt44316.txt
new file mode 100644
index 00000000000..6e077339484
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/sealed/kt44316.txt
@@ -0,0 +1,24 @@
+package
+
+public sealed class Base {
+    internal constructor Base()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class Derived : Base {
+    public constructor Derived()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class Test</*0*/ out V> {
+    public constructor Test</*0*/ out V>(/*0*/ x: Base)
+    public final val x: Base
+    private final val y: kotlin.Nothing?
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
diff --git a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java
index c9b5822b670..9ab80c8a85b 100644
--- a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java
+++ b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java
@@ -24481,6 +24481,12 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
                 runTest("compiler/testData/diagnostics/tests/sealed/inheritorInDifferentModule.kt");
             }
 
+            @Test
+            @TestMetadata("kt44316.kt")
+            public void testKt44316() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/sealed/kt44316.kt");
+            }
+
             @Test
             @TestMetadata("Local.kt")
             public void testLocal() throws Exception {
diff --git a/core/descriptors/src/org/jetbrains/kotlin/resolve/scopes/MemberScope.kt b/core/descriptors/src/org/jetbrains/kotlin/resolve/scopes/MemberScope.kt
index bd8224e80ed..3bc4e41cb33 100644
--- a/core/descriptors/src/org/jetbrains/kotlin/resolve/scopes/MemberScope.kt
+++ b/core/descriptors/src/org/jetbrains/kotlin/resolve/scopes/MemberScope.kt
@@ -138,6 +138,24 @@ class DescriptorKindFilter(
         }
     }
 
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as DescriptorKindFilter
+
+        if (excludes != other.excludes) return false
+        if (kindMask != other.kindMask) return false
+
+        return true
+    }
+
+    override fun hashCode(): Int {
+        var result = excludes.hashCode()
+        result = 31 * result + kindMask
+        return result
+    }
+
     companion object {
         private var nextMaskValue: Int = 0x01
         private fun nextMask() = nextMaskValue.apply { nextMaskValue = nextMaskValue shl 1 }