Sealed constructors are made private in front-end, tests changed accordingly

compiler/testData/diagnostics/tests/sealed/DoubleInner.txt

@@ -1,7 +1,7 @@
 package
 
 internal sealed class Sealed {
-    public constructor Sealed(/*0*/ x: kotlin.Int)
+    private constructor Sealed(/*0*/ x: kotlin.Int)
     internal final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int

compiler/testData/diagnostics/tests/sealed/ExhaustiveWhen.txt

@@ -3,7 +3,7 @@ package
 internal fun foo(/*0*/ s: Sealed): kotlin.Int
 
 internal sealed class Sealed {
-    public constructor Sealed(/*0*/ x: kotlin.Int)
+    private constructor Sealed(/*0*/ x: kotlin.Int)
     internal final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int

compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenDoubleInner.txt

@@ -3,7 +3,7 @@ package
 internal fun foo(/*0*/ s: Sealed): kotlin.Int
 
 internal sealed class Sealed {
-    public constructor Sealed()
+    private constructor Sealed()
     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

compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenMultipleInner.txt

@@ -6,7 +6,7 @@ internal fun fooWithElse(/*0*/ s: Sealed): kotlin.Int
 internal fun fooWithoutElse(/*0*/ s: Sealed): kotlin.Int
 
 internal sealed class Sealed {
-    public constructor Sealed()
+    private constructor Sealed()
     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

compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenNegated.txt

@@ -3,7 +3,7 @@ package
 internal fun foo(/*0*/ s: Sealed): kotlin.Int
 
 internal sealed class Sealed {
-    public constructor Sealed(/*0*/ x: kotlin.Int)
+    private constructor Sealed(/*0*/ x: kotlin.Int)
     internal final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int

compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenNegatedTwice.txt

@@ -3,7 +3,7 @@ package
 internal fun foo(/*0*/ s: Sealed): kotlin.Int
 
 internal sealed class Sealed {
-    public constructor Sealed(/*0*/ x: kotlin.Int)
+    private constructor Sealed(/*0*/ x: kotlin.Int)
     internal final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int

compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenOnNestedSealed.txt

@@ -3,7 +3,7 @@ package
 internal fun foo(/*0*/ s: Sealed, /*1*/ nf: Sealed.NonFirst): kotlin.Int
 
 internal sealed class Sealed {
-    public constructor Sealed()
+    private constructor Sealed()
     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
@@ -16,7 +16,7 @@ internal sealed class Sealed {
     }
 
     internal sealed class NonFirst {
-        public constructor NonFirst()
+        private constructor NonFirst()
         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

compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenOnNullable.txt

@@ -3,7 +3,7 @@ package
 internal fun foo(/*0*/ s: Sealed?): kotlin.Int
 
 internal sealed class Sealed {
-    public constructor Sealed(/*0*/ x: kotlin.Int)
+    private constructor Sealed(/*0*/ x: kotlin.Int)
     internal final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int

compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenWithAdditionalMember.txt

@@ -3,7 +3,7 @@ package
 internal fun foo(/*0*/ s: Sealed): kotlin.Int
 
 internal sealed class Sealed {
-    public constructor Sealed(/*0*/ x: kotlin.Int)
+    private constructor Sealed(/*0*/ x: kotlin.Int)
     internal final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int

compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenWithElse.txt

@@ -3,7 +3,7 @@ package
 internal fun foo(/*0*/ s: Sealed): kotlin.Int
 
 internal sealed class Sealed {
-    public constructor Sealed(/*0*/ x: kotlin.Int)
+    private constructor Sealed(/*0*/ x: kotlin.Int)
     internal final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int

compiler/testData/diagnostics/tests/sealed/Local.txt

@@ -1,7 +1,7 @@
 package
 
 internal sealed class Sealed {
-    public constructor Sealed()
+    private constructor Sealed()
     internal final val p: Sealed
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int

compiler/testData/diagnostics/tests/sealed/NeverConstructed.txt

@@ -1,7 +1,7 @@
 package
 
 internal sealed class Base {
-    public constructor Base()
+    private constructor Base()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     internal final fun foo(): Base
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int

compiler/testData/diagnostics/tests/sealed/NeverDerived.kt

@@ -2,6 +2,6 @@ sealed class Base {
 
 }
 
-class Derived: <!SEALED_SUPERTYPE!>Base<!>() {
+class Derived: <!INVISIBLE_MEMBER, SEALED_SUPERTYPE!>Base<!>() {
 
 }

compiler/testData/diagnostics/tests/sealed/NeverDerived.txt

@@ -1,7 +1,7 @@
 package
 
 internal sealed class Base {
-    public constructor Base()
+    private 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

compiler/testData/diagnostics/tests/sealed/NeverFinal.txt

@@ -1,7 +1,7 @@
 package
 
 internal sealed class Base {
-    public constructor Base()
+    private 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

compiler/testData/diagnostics/tests/sealed/NeverOpen.txt

@@ -1,7 +1,7 @@
 package
 
 internal sealed class Base {
-    public constructor Base()
+    private 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

compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhen.txt

@@ -3,7 +3,7 @@ package
 internal fun foo(/*0*/ s: Sealed): kotlin.Int
 
 internal sealed class Sealed {
-    public constructor Sealed(/*0*/ x: kotlin.Int)
+    private constructor Sealed(/*0*/ x: kotlin.Int)
     internal final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int

compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhenNegated.txt

@@ -3,7 +3,7 @@ package
 internal fun foo(/*0*/ s: Sealed): kotlin.Int
 
 internal sealed class Sealed {
-    public constructor Sealed(/*0*/ x: kotlin.Int)
+    private constructor Sealed(/*0*/ x: kotlin.Int)
     internal final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int

compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhenWithAdditionalCase.txt

@@ -3,7 +3,7 @@ package
 internal fun foo(/*0*/ s: Sealed): kotlin.Int
 
 internal sealed class Sealed {
-    public constructor Sealed(/*0*/ x: kotlin.Int)
+    private constructor Sealed(/*0*/ x: kotlin.Int)
     internal final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int

compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhenWithAnyCase.txt

@@ -3,7 +3,7 @@ package
 internal fun foo(/*0*/ s: Sealed): kotlin.Int
 
 internal sealed class Sealed {
-    public constructor Sealed()
+    private constructor Sealed()
     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

compiler/testData/diagnostics/tests/sealed/OperationWhen.txt

@@ -3,7 +3,7 @@ package
 internal fun priority(/*0*/ op: Operation): kotlin.Int
 
 internal sealed class Operation {
-    public constructor Operation(/*0*/ left: kotlin.Int, /*1*/ right: kotlin.Int)
+    private constructor Operation(/*0*/ left: kotlin.Int, /*1*/ right: kotlin.Int)
     internal final val left: kotlin.Int
     internal final val right: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean

compiler/testData/diagnostics/tests/sealed/RedundantAbstract.txt

@@ -1,7 +1,7 @@
 package
 
 internal sealed class Base {
-    public constructor Base()
+    private 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

compiler/testData/diagnostics/tests/sealed/TreeWhen.txt

@@ -1,7 +1,7 @@
 package
 
 internal sealed class Tree {
-    public constructor Tree()
+    private constructor Tree()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     internal final fun max(): kotlin.Int

compiler/testData/diagnostics/tests/sealed/TreeWhenFunctional.txt

@@ -1,7 +1,7 @@
 package
 
 internal sealed class Tree {
-    public constructor Tree()
+    private constructor Tree()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     internal final fun max(): kotlin.Int

compiler/testData/diagnostics/tests/sealed/TreeWhenFunctionalNoIs.txt

@@ -1,7 +1,7 @@
 package
 
 internal sealed class Tree {
-    public constructor Tree()
+    private constructor Tree()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     internal final fun max(): kotlin.Int

compiler/testData/diagnostics/tests/sealed/WhenOnEmptySealed.txt

@@ -3,7 +3,7 @@ package
 internal fun foo(/*0*/ s: Sealed): kotlin.Int
 
 internal sealed class Sealed {
-    public constructor Sealed()
+    private constructor Sealed()
     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

core/descriptors/src/org/jetbrains/kotlin/resolve/DescriptorUtils.java

@@ -375,7 +375,7 @@ public class DescriptorUtils {
     @NotNull
     public static Visibility getDefaultConstructorVisibility(@NotNull ClassDescriptor classDescriptor) {
         ClassKind classKind = classDescriptor.getKind();
-        if (classKind == ClassKind.ENUM_CLASS || classKind.isSingleton()) {
+        if (classKind == ClassKind.ENUM_CLASS || classKind.isSingleton() || classDescriptor.getModality() == Modality.SEALED) {
             return Visibilities.PRIVATE;
         }
         if (isAnonymousObject(classDescriptor)) {