Diagnostic tests for duplicate JVM signatures

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

@@ -0,0 +1,7 @@
+import kotlin.properties.ReadWriteProperty
+import kotlin.properties.Delegates
+
+class C {
+    val `x$delegate`: ReadWriteProperty<Any, Any>? = null
+    val x: String? by Delegates.notNull()
+}

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

@@ -0,0 +1,7 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+import kotlin.platform.*
+
+[platformName("bar")]
+fun foo(a: Any) {}
+
+fun Any.foo() {}

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

@@ -0,0 +1,7 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+import kotlin.platform.*
+
+<!CONFLICTING_JVM_DECLARATIONS!>[platformName("bar")]
+fun foo(a: Any)<!> {}
+
+<!CONFLICTING_JVM_DECLARATIONS!>fun bar(a: Any)<!> {}