Remove setter parameter type: do not suggest if type is empty

So #KT-22339 Fixed

idea/src/org/jetbrains/kotlin/idea/inspections/RemoveSetterParameterTypeInspection.kt

@@ -12,16 +12,20 @@ import com.intellij.psi.PsiElementVisitor
 import org.jetbrains.kotlin.idea.intentions.RemoveExplicitTypeIntention
 import org.jetbrains.kotlin.idea.intentions.isSetterParameter
 import org.jetbrains.kotlin.psi.parameterVisitor
+import org.jetbrains.kotlin.psi.psiUtil.endOffset
+import org.jetbrains.kotlin.psi.psiUtil.startOffset
 
 class RemoveSetterParameterTypeInspection : AbstractKotlinInspection() {
     override fun buildVisitor(holder: ProblemsHolder, isOnTheFly: Boolean): PsiElementVisitor {
-        return parameterVisitor { dcl ->
+        return parameterVisitor { parameter ->
-            val typeReference = dcl.takeIf { it.isSetterParameter }?.typeReference ?: return@parameterVisitor
+            val typeReference = parameter.takeIf { it.isSetterParameter }
+                ?.typeReference
+                ?.takeIf { it.endOffset > it.startOffset } ?: return@parameterVisitor
             holder.registerProblem(
                 typeReference,
                 "Redundant setter parameter type",
                 ProblemHighlightType.LIKE_UNUSED_SYMBOL,
-                IntentionWrapper(RemoveExplicitTypeIntention(), dcl.containingKtFile)
+                IntentionWrapper(RemoveExplicitTypeIntention(), parameter.containingKtFile)
             )
         }
     }

idea/testData/inspectionsLocal/removeSetterParameterType/.inspection

@@ -0,0 +1 @@
+org.jetbrains.kotlin.idea.inspections.RemoveSetterParameterTypeInspection

idea/testData/inspectionsLocal/removeSetterParameterType/emptyType.kt

@@ -0,0 +1,7 @@
+// PROBLEM: none
+// SKIP_ERRORS_BEFORE
+// SKIP_ERRORS_AFTER
+
+var x: String
+    get() = "123"
+    set(v:<caret> ) {}

idea/tests/org/jetbrains/kotlin/idea/inspections/LocalInspectionTestGenerated.java

@@ -3100,6 +3100,21 @@ public class LocalInspectionTestGenerated extends AbstractLocalInspectionTest {
         }
     }
 
+    @TestMetadata("idea/testData/inspectionsLocal/removeSetterParameterType")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class RemoveSetterParameterType extends AbstractLocalInspectionTest {
+        public void testAllFilesPresentInRemoveSetterParameterType() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/inspectionsLocal/removeSetterParameterType"), Pattern.compile("^([\\w\\-_]+)\\.(kt|kts)$"), TargetBackend.ANY, true);
+        }
+
+        @TestMetadata("emptyType.kt")
+        public void testEmptyType() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/removeSetterParameterType/emptyType.kt");
+            doTest(fileName);
+        }
+    }
+
     @TestMetadata("idea/testData/inspectionsLocal/removeToStringInStringTemplate")
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)
@@ -4060,27 +4075,6 @@ public class LocalInspectionTestGenerated extends AbstractLocalInspectionTest {
         }
     }
 
-    @TestMetadata("idea/testData/inspectionsLocal/unusedLambdaExpressionBody")
-    @TestDataPath("$PROJECT_ROOT")
-    @RunWith(JUnit3RunnerWithInners.class)
-    public static class UnusedLambdaExpressionBody extends AbstractLocalInspectionTest {
-        public void testAllFilesPresentInUnusedLambdaExpressionBody() throws Exception {
-            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/inspectionsLocal/unusedLambdaExpressionBody"), Pattern.compile("^([\\w\\-_]+)\\.(kt|kts)$"), TargetBackend.ANY, true);
-        }
-
-        @TestMetadata("inEnumEntry.kt")
-        public void testInEnumEntry() throws Exception {
-            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/unusedLambdaExpressionBody/inEnumEntry.kt");
-            doTest(fileName);
-        }
-
-        @TestMetadata("simple.kt")
-        public void testSimple() throws Exception {
-            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/unusedLambdaExpressionBody/simple.kt");
-            doTest(fileName);
-        }
-    }
-
     @TestMetadata("idea/testData/inspectionsLocal/unsafeCastFromDynamic")
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)
@@ -4108,6 +4102,27 @@ public class LocalInspectionTestGenerated extends AbstractLocalInspectionTest {
         }
     }
 
+    @TestMetadata("idea/testData/inspectionsLocal/unusedLambdaExpressionBody")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class UnusedLambdaExpressionBody extends AbstractLocalInspectionTest {
+        public void testAllFilesPresentInUnusedLambdaExpressionBody() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/inspectionsLocal/unusedLambdaExpressionBody"), Pattern.compile("^([\\w\\-_]+)\\.(kt|kts)$"), TargetBackend.ANY, true);
+        }
+
+        @TestMetadata("inEnumEntry.kt")
+        public void testInEnumEntry() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/unusedLambdaExpressionBody/inEnumEntry.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("simple.kt")
+        public void testSimple() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/unusedLambdaExpressionBody/simple.kt");
+            doTest(fileName);
+        }
+    }
+
     @TestMetadata("idea/testData/inspectionsLocal/unusedReceiverParameter")
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)