Reporting ACCIDENTAL_OVERRIDE on jvm signatures that have no descriptors

(marking them SYNTHETIC)

compiler/testData/diagnostics/tests/duplicateJvmSignature/accidentalOverrides/defaultFunction.kt

@@ -0,0 +1,9 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+open class Base {
+    open fun `foo$default`(d: Derived, i: Int, mask: Int) {}
+}
+
+class Derived : Base() {
+    <!ACCIDENTAL_OVERRIDE!>fun foo(i: Int = 0)<!> {}
+}

compiler/testData/diagnostics/tests/duplicateJvmSignature/specialNames/defaults.kt

@@ -1,6 +1,6 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
-class <!CONFLICTING_JVM_DECLARATIONS!>C<!> {
+class C {
     <!CONFLICTING_JVM_DECLARATIONS!>fun `a$default`(c: C, x: Int, m: Int)<!> {}
-    fun a(x: Int = 1) {}
+    <!CONFLICTING_JVM_DECLARATIONS!>fun a(x: Int = 1)<!> {}
 }

compiler/testData/diagnostics/testsWithStdLib/duplicateJvmSignature/platformStaticInClassObject.kt

@@ -0,0 +1,11 @@
+import kotlin.platform.platformStatic
+
+open class Base {
+    fun foo() {}
+}
+
+class Derived : Base() {
+    class object {
+        <!ACCIDENTAL_OVERRIDE!>platformStatic fun foo()<!> {}
+    }
+}

compiler/testData/diagnostics/testsWithStdLib/duplicateJvmSignature/platformStaticInObject.kt

@@ -0,0 +1,10 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+import kotlin.platform.platformStatic
+
+open class Base {
+    fun `foo$default`(i: Int, mask: Int) {}
+}
+
+object Derived : Base() {
+    <!ACCIDENTAL_OVERRIDE!>platformStatic fun foo(i: Int = 0)<!> {}
+}