Create From Usage: Fix ClassCastException on local property with delegate

#EA-69707 Fixed

compiler/frontend/src/org/jetbrains/kotlin/cfg/JetControlFlowProcessor.java

@@ -1147,7 +1147,9 @@ public class JetControlFlowProcessor {
             JetExpression delegate = property.getDelegateExpression();
             if (delegate != null) {
                 generateInstructions(delegate);
-                generateDelegateConsumer(property, delegate);
+                if (builder.getBoundValue(delegate) != null) {
+                    createSyntheticValue(property, MagicKind.VALUE_CONSUMER, delegate);
+                }
             }
 
             if (JetPsiUtil.isLocal(property)) {
@@ -1157,15 +1159,6 @@ public class JetControlFlowProcessor {
             }
         }
 
-        private void generateDelegateConsumer(@NotNull JetProperty property, @NotNull JetExpression delegate) {
-            DeclarationDescriptor descriptor = trace.get(BindingContext.DECLARATION_TO_DESCRIPTOR, property);
-            if (!(descriptor instanceof PropertyDescriptor)) return;
-
-            if (builder.getBoundValue(delegate) == null) return;
-
-            createSyntheticValue(property, MagicKind.VALUE_CONSUMER, delegate);
-        }
-
         @Override
         public void visitMultiDeclaration(@NotNull JetMultiDeclaration declaration) {
             visitMultiDeclaration(declaration, true);

idea/src/org/jetbrains/kotlin/idea/quickfix/createFromUsage/callableBuilder/typeUtils.kt

@@ -19,10 +19,7 @@ package org.jetbrains.kotlin.idea.quickfix.createFromUsage.callableBuilder
 import com.intellij.refactoring.psi.SearchUtils
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.cfg.pseudocode.*
-import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
-import org.jetbrains.kotlin.descriptors.ModuleDescriptor
-import org.jetbrains.kotlin.descriptors.PropertyDescriptor
-import org.jetbrains.kotlin.descriptors.TypeParameterDescriptor
+import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.idea.references.JetSimpleNameReference
 import org.jetbrains.kotlin.incremental.components.NoLookupLocation
 import org.jetbrains.kotlin.name.FqName
@@ -171,13 +168,13 @@ fun JetExpression.guessTypes(
             }
         }
         parent is JetPropertyDelegate -> {
-            val property = context[BindingContext.DECLARATION_TO_DESCRIPTOR, parent.getParent() as JetProperty] as PropertyDescriptor
-            val delegateClassName = if (property.isVar()) "ReadWriteProperty" else "ReadOnlyProperty"
+            val variableDescriptor = context[BindingContext.DECLARATION_TO_DESCRIPTOR, parent.getParent() as JetProperty] as VariableDescriptor
+            val delegateClassName = if (variableDescriptor.isVar()) "ReadWriteProperty" else "ReadOnlyProperty"
             val delegateClass = module.resolveTopLevelClass(FqName("kotlin.properties.$delegateClassName"))
                                 ?: return arrayOf(module.builtIns.getAnyType())
-            val receiverType = (property.getExtensionReceiverParameter() ?: property.getDispatchReceiverParameter())?.getType()
+            val receiverType = (variableDescriptor.getExtensionReceiverParameter() ?: variableDescriptor.getDispatchReceiverParameter())?.getType()
                                ?: module.builtIns.getNullableNothingType()
-            val typeArguments = listOf(TypeProjectionImpl(receiverType), TypeProjectionImpl(property.getType()))
+            val typeArguments = listOf(TypeProjectionImpl(receiverType), TypeProjectionImpl(variableDescriptor.getType()))
             arrayOf(TypeUtils.substituteProjectionsForParameters(delegateClass, typeArguments))
         }
         parent is JetStringTemplateEntryWithExpression && parent.getExpression() == this -> {

idea/testData/quickfix/createFromUsage/createVariable/property/localValDelegateRuntime.kt

@@ -0,0 +1,7 @@
+// "Create property 'foo'" "true"
+// ERROR: Local variables are not allowed to have delegates
+// ERROR: Property must be initialized
+
+fun test() {
+    val x: Int by <caret>foo
+}

idea/testData/quickfix/createFromUsage/createVariable/property/localValDelegateRuntime.kt.after

@@ -0,0 +1,11 @@
+import kotlin.properties.ReadOnlyProperty
+
+// "Create property 'foo'" "true"
+// ERROR: Local variables are not allowed to have delegates
+// ERROR: Property must be initialized
+
+val foo: ReadOnlyProperty<Nothing?, Int>
+
+fun test() {
+    val x: Int by foo
+}

idea/tests/org/jetbrains/kotlin/idea/quickfix/QuickFixTestGenerated.java

@@ -2735,6 +2735,12 @@ public class QuickFixTestGenerated extends AbstractQuickFixTest {
                     doTest(fileName);
                 }
 
+                @TestMetadata("localValDelegateRuntime.kt")
+                public void testLocalValDelegateRuntime() throws Exception {
+                    String fileName = JetTestUtils.navigationMetadata("idea/testData/quickfix/createFromUsage/createVariable/property/localValDelegateRuntime.kt");
+                    doTest(fileName);
+                }
+
                 @TestMetadata("localValNoReceiver.kt")
                 public void testLocalValNoReceiver() throws Exception {
                     String fileName = JetTestUtils.navigationMetadata("idea/testData/quickfix/createFromUsage/createVariable/property/localValNoReceiver.kt");