Codegen should just skip (local) type alias declarations.

compiler/backend/src/org/jetbrains/kotlin/codegen/ExpressionCodegen.java

@@ -360,6 +360,11 @@ public class ExpressionCodegen extends KtVisitor<StackValue, StackValue> impleme
         return visitClassOrObject(klass);
     }
 
+    @Override
+    public StackValue visitTypeAlias(@NotNull KtTypeAlias typeAlias, StackValue data) {
+        return StackValue.none();
+    }
+
     private StackValue visitClassOrObject(KtClassOrObject declaration) {
         ClassDescriptor descriptor = bindingContext.get(CLASS, declaration);
         assert descriptor != null;

compiler/testData/codegen/box/typealias/localTypeAlias.kt

@@ -0,0 +1,16 @@
+class Cell<TC>(val x: TC)
+
+object OkHost {
+    val value = "OK"
+}
+
+fun <T> id(x: T): T {
+    typealias C = Cell<T>
+    val c: C = C(x)
+    return c.x
+}
+
+fun box(): String {
+    typealias OK = OkHost
+    return id(OK.value)
+}

compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java

@@ -14581,6 +14581,12 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/typealias"), Pattern.compile("^(.+)\\.kt$"), true);
         }
 
+        @TestMetadata("localTypeAlias.kt")
+        public void testLocalTypeAlias() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/typealias/localTypeAlias.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("simple.kt")
         public void testSimple() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/typealias/simple.kt");