Allow 'lateinit' modifier on local variables

compiler/frontend/src/org/jetbrains/kotlin/resolve/ModifiersChecker.kt

@@ -74,7 +74,7 @@ object ModifierCheckerCore {
             REIFIED_KEYWORD   to EnumSet.of(TYPE_PARAMETER),
             VARARG_KEYWORD    to EnumSet.of(VALUE_PARAMETER, PROPERTY_PARAMETER),
             COMPANION_KEYWORD to EnumSet.of(OBJECT),
-            LATEINIT_KEYWORD to EnumSet.of(MEMBER_PROPERTY),
+            LATEINIT_KEYWORD  to EnumSet.of(MEMBER_PROPERTY, LOCAL_VARIABLE),
             DATA_KEYWORD      to EnumSet.of(CLASS_ONLY, LOCAL_CLASS),
             INLINE_KEYWORD    to EnumSet.of(FUNCTION, PROPERTY, PROPERTY_GETTER, PROPERTY_SETTER),
             NOINLINE_KEYWORD  to EnumSet.of(VALUE_PARAMETER),

compiler/testData/diagnostics/tests/lateinit/modifierApplicability.kt

@@ -19,7 +19,7 @@ public abstract class A<T: Any, V: String?>(<!INAPPLICABLE_LATEINIT_MODIFIER!>la
         private set
 
     fun a() {
-        <!WRONG_MODIFIER_TARGET!>lateinit<!> var <!UNUSED_VARIABLE!>a<!>: String
+        lateinit var <!UNUSED_VARIABLE!>a<!>: String
     }
 
     <!INAPPLICABLE_LATEINIT_MODIFIER!>lateinit<!> var e1: V

compiler/testData/diagnostics/tests/properties/localLateinit/localLateinit.kt

@@ -0,0 +1,5 @@
+fun test() {
+    lateinit var s: String
+    s = ""
+    s.length
+}

compiler/testData/diagnostics/tests/properties/localLateinit/localLateinit.txt

@@ -0,0 +1,3 @@
+package
+
+public fun test(): kotlin.Unit

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

@@ -16254,6 +16254,21 @@ public class DiagnosticsTestGenerated extends AbstractDiagnosticsTest {
                     doTest(fileName);
                 }
             }
+
+            @TestMetadata("compiler/testData/diagnostics/tests/properties/localLateinit")
+            @TestDataPath("$PROJECT_ROOT")
+            @RunWith(JUnit3RunnerWithInners.class)
+            public static class LocalLateinit extends AbstractDiagnosticsTest {
+                public void testAllFilesPresentInLocalLateinit() throws Exception {
+                    KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/diagnostics/tests/properties/localLateinit"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.ANY, true);
+                }
+
+                @TestMetadata("localLateinit.kt")
+                public void testLocalLateinit() throws Exception {
+                    String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/properties/localLateinit/localLateinit.kt");
+                    doTest(fileName);
+                }
+            }
         }
 
         @TestMetadata("compiler/testData/diagnostics/tests/qualifiedExpression")