JVM IR: Fix mangling of @JvmStatic internal function in companion objects

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmStaticAnnotationLowering.kt

@@ -21,6 +21,7 @@ import org.jetbrains.kotlin.backend.jvm.ir.copyCorrespondingPropertyFrom
 import org.jetbrains.kotlin.backend.jvm.ir.isInCurrentModule
 import org.jetbrains.kotlin.backend.jvm.ir.replaceThisByStaticReference
 import org.jetbrains.kotlin.descriptors.Modality
+import org.jetbrains.kotlin.descriptors.Visibilities
 import org.jetbrains.kotlin.ir.builders.declarations.addFunction
 import org.jetbrains.kotlin.ir.builders.declarations.buildFunWithDescriptorForInlining
 import org.jetbrains.kotlin.ir.builders.irCall
@@ -99,7 +100,9 @@ private class CompanionObjectJvmStaticLowering(val context: JvmBackendContext) :
             // so we do not have a property to link it up to. Therefore, we compute the right name now.
             name = Name.identifier(context.methodSignatureMapper.mapFunctionName(target))
             modality = if (isInterface) Modality.OPEN else target.modality
-            visibility = target.visibility
+            // Since we already mangle the name above we need to reset internal visibilities to public in order
+            // to avoid mangling the same name twice.
+            visibility = if (target.visibility == Visibilities.INTERNAL) Visibilities.PUBLIC else target.visibility
             isSuspend = target.isSuspend
         }.apply {
             copyTypeParametersFrom(target)