Prohibit @JvmField for private properties

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/checkers/JvmFieldApplicabilityChecker.kt

@@ -19,6 +19,7 @@ package org.jetbrains.kotlin.resolve.jvm.checkers
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
 import org.jetbrains.kotlin.descriptors.PropertyDescriptor
+import org.jetbrains.kotlin.descriptors.Visibilities
 import org.jetbrains.kotlin.diagnostics.DiagnosticSink
 import org.jetbrains.kotlin.fileClasses.JvmFileClassUtil
 import org.jetbrains.kotlin.psi.JetDeclaration
@@ -36,6 +37,7 @@ class JvmFieldApplicabilityChecker : DeclarationChecker {
     enum class Problem(val errorMessage: String) {
         NOT_A_PROPERTY("JvmField can only be applied to a property"),
         NOT_FINAL("JvmField can only be applied to final property"),
+        PRIVATE("JvmField has no effect on a private property"),
         CUSTOM_ACCESSOR("JvmField cannot be applied to a property with a custom accessor"),
         NO_BACKING_FIELD("JvmField can only be applied to a property with backing field"),
         OVERRIDES("JvmField cannot be applied to a property that overrides some other property"),
@@ -56,6 +58,7 @@ class JvmFieldApplicabilityChecker : DeclarationChecker {
         val problem = when {
             descriptor !is PropertyDescriptor -> NOT_A_PROPERTY
             descriptor.modality.isOverridable -> NOT_FINAL
+            Visibilities.isPrivate(descriptor.visibility) -> PRIVATE
             !descriptor.hasBackingField(bindingContext) -> NO_BACKING_FIELD
             descriptor.hasCustomAccessor() -> CUSTOM_ACCESSOR
             descriptor.overriddenDescriptors.isNotEmpty() -> OVERRIDES

compiler/testData/diagnostics/testsWithStdLib/annotations/jvmField/jvmFieldApplicability.kt

@@ -35,6 +35,9 @@ abstract class C : I{
 
     <!INAPPLICABLE_JVM_FIELD!>@JvmField<!>
     final override val ai = 3
+
+    <!INAPPLICABLE_JVM_FIELD!>@JvmField<!>
+    private val private = 3
 }
 
 interface I {
@@ -71,4 +74,7 @@ interface K {
 object O {
     @JvmField
     val c = 3
-}
+}
+
+<!INAPPLICABLE_JVM_FIELD!>@JvmField<!>
+private val private = 3

compiler/testData/diagnostics/testsWithStdLib/annotations/jvmField/jvmFieldApplicability.txt

@@ -2,6 +2,7 @@ package
 
 @kotlin.jvm.JvmField() public const val Const: kotlin.Int = 4
 @kotlin.jvm.JvmField() public var i: kotlin.Int
+@kotlin.jvm.JvmField() private val private: kotlin.Int = 3
 @kotlin.jvm.JvmField() public fun foo(): kotlin.Unit
 
 @kotlin.jvm.JvmField() public abstract class C : I {
@@ -14,6 +15,7 @@ package
     @kotlin.jvm.JvmField() public final val customGetter: kotlin.String = ""
     @kotlin.jvm.JvmField() public final var customSetter: kotlin.String
     @kotlin.jvm.JvmField() public final val noBackingField: kotlin.String
+    @kotlin.jvm.JvmField() private final val private: kotlin.Int = 3
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     @kotlin.jvm.JvmField() private final fun foo(/*0*/ s: kotlin.String = ...): kotlin.Unit
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int