the source for a parameter of the generated copy() function is the corresponding constructor parameter

#KT-8698 Fixed

compiler/frontend/src/org/jetbrains/kotlin/resolve/DescriptorResolver.java

@@ -268,7 +268,7 @@ public class DescriptorResolver {
                     new ValueParameterDescriptorImpl(functionDescriptor, null, parameter.getIndex(), parameter.getAnnotations(),
                                                      parameter.getName(), parameter.getType(),
                                                      declaresDefaultValue,
-                                                     parameter.getVarargElementType(), SourceElement.NO_SOURCE);
+                                                     parameter.getVarargElementType(), parameter.getSource());
             parameterDescriptors.add(parameterDescriptor);
             if (declaresDefaultValue) {
                 trace.record(BindingContext.VALUE_PARAMETER_AS_PROPERTY, parameterDescriptor, propertyDescriptor);

idea/testData/refactoring/rename/simpleNameReference/parameterOfCopyMethod.kt

@@ -0,0 +1,6 @@
+data class A(val <caret>x: Int)
+
+fun main(args: Array<String>) {
+    val a = A(x = 1)
+    val b = a.copy(x = 2)
+}

idea/testData/refactoring/rename/simpleNameReference/parameterOfCopyMethod.kt.after

@@ -0,0 +1,6 @@
+data class A(val y: Int)
+
+fun main(args: Array<String>) {
+    val a = A(y = 1)
+    val b = a.copy(y = 2)
+}

idea/tests/org/jetbrains/kotlin/idea/refactoring/rename/SimpleNameReferenceRenameTest.java

@@ -51,6 +51,10 @@ public class SimpleNameReferenceRenameTest extends LightCodeInsightTestCase {
         doTest("xyzzy");
     }
 
+    public void testParameterOfCopyMethod() throws Exception {
+        doTest("y");
+    }
+
     private void doTest(String newName) throws Exception {
         configureByFile(getTestName(true) + ".kt");
         PsiElement element = TargetElementUtilBase