Fix using qualified this with labeled function literals

#KT-9251 Fixed

compiler/frontend/src/org/jetbrains/kotlin/types/expressions/LabelResolver.kt

@@ -182,8 +182,7 @@ object LabelResolver {
         }
         else if (size == 0) {
             val element = resolveNamedLabel(labelName, targetLabel, context.trace)
-            if (element is KtFunctionLiteral) {
+            val declarationDescriptor = context.trace.bindingContext[BindingContext.DECLARATION_TO_DESCRIPTOR, element]
-                val declarationDescriptor = context.trace.bindingContext.get(BindingContext.DECLARATION_TO_DESCRIPTOR, element)
             if (declarationDescriptor is FunctionDescriptor) {
                 val thisReceiver = declarationDescriptor.extensionReceiverParameter
                 if (thisReceiver != null) {
@@ -196,10 +195,6 @@ object LabelResolver {
                 context.trace.report(UNRESOLVED_REFERENCE.on(targetLabel, targetLabel))
             }
         }
-            else {
-                context.trace.report(UNRESOLVED_REFERENCE.on(targetLabel, targetLabel))
-            }
-        }
         else {
             BindingContextUtils.reportAmbiguousLabel(context.trace, targetLabel, declarationsByLabel)
         }

compiler/testData/diagnostics/tests/labels/labeledFunctionLiteral.kt

@@ -0,0 +1,17 @@
+// !DIAGNOSTICS: -UNUSED_VARIABLE
+
+val funLit = lambda@ fun String.() {
+    val d1 = this@lambda
+}
+
+fun test() {
+    val funLit = lambda@ fun String.(): String {
+        return this@lambda
+    }
+}
+
+fun lambda() {
+    val funLit = lambda@ fun String.(): String {
+        return <!NO_THIS!>this@lambda<!>
+    }
+}

compiler/testData/diagnostics/tests/labels/labeledFunctionLiteral.txt

@@ -0,0 +1,5 @@
+package
+
+public val funLit: kotlin.String.() -> kotlin.Unit
+public fun lambda(): kotlin.Unit
+public fun test(): kotlin.Unit

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

@@ -12670,6 +12670,12 @@ public class DiagnosticsTestGenerated extends AbstractDiagnosticsTest {
                 doTest(fileName);
             }
 
+            @TestMetadata("labeledFunctionLiteral.kt")
+            public void testLabeledFunctionLiteral() throws Exception {
+                String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/labels/labeledFunctionLiteral.kt");
+                doTest(fileName);
+            }
+
             @TestMetadata("labelsMustBeNamed.kt")
             public void testLabelsMustBeNamed() throws Exception {
                 String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/labels/labelsMustBeNamed.kt");