Support underscores in non local destructuring declarations

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

@@ -73,6 +73,7 @@ import org.jetbrains.kotlin.resolve.calls.callUtil.CallUtilKt;
 import org.jetbrains.kotlin.resolve.calls.model.*;
 import org.jetbrains.kotlin.resolve.calls.util.CallMaker;
 import org.jetbrains.kotlin.resolve.calls.util.FakeCallableDescriptorForObject;
+import org.jetbrains.kotlin.resolve.calls.util.UnderscoreUtilKt;
 import org.jetbrains.kotlin.resolve.constants.CompileTimeConstant;
 import org.jetbrains.kotlin.resolve.constants.ConstantValue;
 import org.jetbrains.kotlin.resolve.constants.evaluate.ConstantExpressionEvaluator;
@@ -3495,7 +3496,7 @@ public class ExpressionCodegen extends KtVisitor<StackValue, StackValue> impleme
             VariableDescriptor variableDescriptor = getVariableDescriptorNotNull(variableDeclaration);
 
             // Do not call `componentX` for destructuring entry called _
-            if (variableDescriptor.getName().isSpecial()) continue;
+            if (UnderscoreUtilKt.isSingleUnderscore(variableDeclaration)) continue;
 
             if (asProperty && variableDescriptor instanceof PropertyDescriptor) {
                 StackValue.Property propertyValue = intermediateValueForProperty(

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

@@ -38,6 +38,7 @@ import org.jetbrains.kotlin.resolve.DescriptorFactory;
 import org.jetbrains.kotlin.resolve.DescriptorToSourceUtils;
 import org.jetbrains.kotlin.resolve.annotations.AnnotationUtilKt;
 import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall;
+import org.jetbrains.kotlin.resolve.calls.util.UnderscoreUtilKt;
 import org.jetbrains.kotlin.resolve.constants.ConstantValue;
 import org.jetbrains.kotlin.resolve.jvm.diagnostics.JvmDeclarationOriginKt;
 import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodGenericSignature;
@@ -142,12 +143,14 @@ public class PropertyCodegen {
     }
 
     private void genDestructuringDeclaration(
-            @Nullable KtDestructuringDeclarationEntry entry,
+            @NotNull KtDestructuringDeclarationEntry entry,
             @NotNull PropertyDescriptor descriptor
     ) {
         assert kind == OwnerKind.PACKAGE || kind == OwnerKind.IMPLEMENTATION || kind == OwnerKind.DEFAULT_IMPLS
                 : "Generating property with a wrong kind (" + kind + "): " + descriptor;
 
+        if (UnderscoreUtilKt.isSingleUnderscore(entry)) return;
+
         genBackingFieldAndAnnotations(entry, descriptor, false);
 
         generateGetter(entry, descriptor, null);

compiler/testData/codegen/script/destructuringDeclarationUnderscore.kts

@@ -0,0 +1,9 @@
+val (_, b, _) = A()
+
+class A {
+    operator fun component1(): Int = throw RuntimeException()
+    operator fun component2() = 2
+    operator fun component3(): Int = throw RuntimeException()
+}
+
+// expected: b: 2

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

@@ -54,6 +54,12 @@ public class ScriptCodegenTestGenerated extends AbstractScriptCodegenTest {
         doTest(fileName);
     }
 
+    @TestMetadata("destructuringDeclarationUnderscore.kts")
+    public void testDestructuringDeclarationUnderscore() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/script/destructuringDeclarationUnderscore.kts");
+        doTest(fileName);
+    }
+
     @TestMetadata("empty.kts")
     public void testEmpty() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/script/empty.kts");