Redeclaration errors for type aliases: type alias vs property.

compiler/testData/diagnostics/tests/redeclarations/TypeAliasVsProperty.kt

@@ -0,0 +1,15 @@
+// FILE: file1.kt
+typealias <!REDECLARATION!>Test<!> = String
+
+val <!REDECLARATION!>Test<!> = 42
+
+class Outer {
+    typealias <!REDECLARATION!>Test<!> = String
+
+    val <!REDECLARATION!>Test<!> = 42
+}
+
+typealias <!REDECLARATION!>Test2<!> = String
+
+// FILE: file2.kt
+val <!REDECLARATION!>Test2<!> = 42

compiler/testData/diagnostics/tests/redeclarations/TypeAliasVsProperty.txt

@@ -0,0 +1,15 @@
+package
+
+public typealias Test = kotlin.String
+public typealias Test2 = kotlin.String
+public val Test: kotlin.Int = 42
+public val Test2: kotlin.Int = 42
+
+public final class Outer {
+    public typealias Test = kotlin.String
+    public constructor Outer()
+    public final val Test: kotlin.Int = 42
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestGenerated.java

@@ -13908,6 +13908,12 @@ public class DiagnosticsTestGenerated extends AbstractDiagnosticsTest {
                 doTest(fileName);
             }
 
+            @TestMetadata("TypeAliasVsProperty.kt")
+            public void testTypeAliasVsProperty() throws Exception {
+                String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/redeclarations/TypeAliasVsProperty.kt");
+                doTest(fileName);
+            }
+
             @TestMetadata("typeParameterWithTwoBounds.kt")
             public void testTypeParameterWithTwoBounds() throws Exception {
                 String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/redeclarations/typeParameterWithTwoBounds.kt");