Nullability assertions for extension receiver

In Kotlin 1.1 and before, there were no nullability assertions on extension receivers, because receiver is resolved with NO_EXPECTED_TYPE. So, if an expression of platform type is passed as an extension receiver to a non-private function, it would fail with IllegalArgumentException. However, if the function is private, then we generated no parameter assertions under assumption that such function can be called from Kotlin only, and all arguments are checked on the call site. Thus 'null' could propagate indefinitely. In Kotlin 1.2, we do the following: - Generate nullability assertions for expression receivers. NB nullability assertions are stored for ReceiverValue instances, not for expressions: given expression can act as receiver in different calls, each with an expected receiver type of its own. - Generate nullability assertions for extension receivers of private operator functions. NB it still can throw NPE for some particular "optimized" cases, but at least those nulls would not propagate indefinitely. This behavior is disabled by an "advanced" command-line option '-Xno-receiver-assertions'.
2017-07-21 17:42:18 +03:00
parent 2427b2cc6c
commit 5d44e095c8
26 changed files with 563 additions and 21 deletions
@@ -33,6 +33,7 @@ import org.jetbrains.kotlin.codegen.serialization.JvmStringTable;
 import org.jetbrains.kotlin.codegen.state.GenerationState;
 import org.jetbrains.kotlin.codegen.state.KotlinTypeMapper;
 import org.jetbrains.kotlin.config.JvmTarget;
+import org.jetbrains.kotlin.config.LanguageFeature;
 import org.jetbrains.kotlin.config.LanguageVersionSettingsImpl;
 import org.jetbrains.kotlin.descriptors.*;
 import org.jetbrains.kotlin.lexer.KtTokens;
@@ -660,8 +661,23 @@ public class AsmUtil {
        // currently when resuming a suspend function we pass default values instead of real arguments (i.e. nulls for references)
        if (descriptor.isSuspend()) return;

-        // Private method is not accessible from other classes, no assertions needed
-        if (getVisibilityAccessFlag(descriptor) == ACC_PRIVATE) return;
+        if (getVisibilityAccessFlag(descriptor) == ACC_PRIVATE) {
+            // Private method is not accessible from other classes, no assertions needed,
+            // unless we have a private operator function, in which we should generate a parameter assertion for an extension receiver.
+
+            // HACK: this provides "fail fast" behavior for operator functions.
+            // Such functions can be invoked in operator conventions desugaring,
+            // which is currently done on ad hoc basis in ExpressionCodegen.
+
+            if (state.isReceiverAssertionsDisabled()) return;
+            if (descriptor.isOperator()) {
+                ReceiverParameterDescriptor receiverParameter = descriptor.getExtensionReceiverParameter();
+                if (receiverParameter != null) {
+                    genParamAssertion(v, state.getTypeMapper(), frameMap, receiverParameter, "$receiver");
+                }
+            }
+            return;
+        }

        ReceiverParameterDescriptor receiverParameter = descriptor.getExtensionReceiverParameter();
        if (receiverParameter != null) {
@@ -677,18 +693,19 @@ public class AsmUtil {
            @NotNull InstructionAdapter v,
            @NotNull KotlinTypeMapper typeMapper,
            @NotNull FrameMap frameMap,
-            @NotNull CallableDescriptor parameter,
+            @NotNull ParameterDescriptor parameter,
            @NotNull String name
    ) {
-        KotlinType type = parameter.getReturnType();
-        if (type == null || isNullableType(type)) return;
+        KotlinType type = parameter.getType();
+        if (isNullableType(type)) return;

        int index = frameMap.getIndex(parameter);
        Type asmType = typeMapper.mapType(type);
        if (asmType.getSort() == Type.OBJECT || asmType.getSort() == Type.ARRAY) {
            v.load(index, asmType);
            v.visitLdcInsn(name);
-            v.invokestatic(IntrinsicMethods.INTRINSICS_CLASS_NAME, "checkParameterIsNotNull",
+            String checkMethod = "checkParameterIsNotNull";
+            v.invokestatic(IntrinsicMethods.INTRINSICS_CLASS_NAME, checkMethod,
                           "(Ljava/lang/Object;Ljava/lang/String;)V", false);
        }
    }
@@ -52,6 +52,7 @@ import org.jetbrains.kotlin.codegen.state.KotlinTypeMapper;
 import org.jetbrains.kotlin.codegen.when.SwitchCodegen;
 import org.jetbrains.kotlin.codegen.when.SwitchCodegenProvider;
 import org.jetbrains.kotlin.config.ApiVersion;
+import org.jetbrains.kotlin.config.LanguageFeature;
 import org.jetbrains.kotlin.descriptors.*;
 import org.jetbrains.kotlin.descriptors.impl.AnonymousFunctionDescriptor;
 import org.jetbrains.kotlin.descriptors.impl.LocalVariableDescriptor;
@@ -2466,7 +2467,14 @@ public class ExpressionCodegen extends KtVisitor<StackValue, StackValue> impleme
            return generateExtensionReceiver(((ExtensionReceiver) receiverValue).getDeclarationDescriptor());
        }
        else if (receiverValue instanceof ExpressionReceiver) {
-            return gen(((ExpressionReceiver) receiverValue).getExpression());
+            ExpressionReceiver expressionReceiver = (ExpressionReceiver) receiverValue;
+            StackValue stackValue = gen(expressionReceiver.getExpression());
+            if (!state.isReceiverAssertionsDisabled()) {
+                RuntimeAssertionInfo runtimeAssertionInfo =
+                        bindingContext.get(JvmBindingContextSlices.RECEIVER_RUNTIME_ASSERTION_INFO, expressionReceiver);
+                stackValue = genNotNullAssertions(state, stackValue, runtimeAssertionInfo);
+            }
+            return stackValue;
        }
        else {
            throw new UnsupportedOperationException("Unsupported receiver value: " + receiverValue);
@@ -156,7 +156,12 @@ class GenerationState @JvmOverloads constructor(
        var hasResult: Boolean = false
    }

+    val languageVersionSettings = configuration.languageVersionSettings
+
    val isCallAssertionsDisabled: Boolean = configuration.getBoolean(JVMConfigurationKeys.DISABLE_CALL_ASSERTIONS)
+    val isReceiverAssertionsDisabled: Boolean =
+            configuration.getBoolean(JVMConfigurationKeys.DISABLE_RECEIVER_ASSERTIONS) ||
+            !languageVersionSettings.supportsFeature(LanguageFeature.NullabilityAssertionOnExtensionReceiver)
    val isParamAssertionsDisabled: Boolean = configuration.getBoolean(JVMConfigurationKeys.DISABLE_PARAM_ASSERTIONS)
    val isInlineDisabled: Boolean = configuration.getBoolean(CommonConfigurationKeys.DISABLE_INLINE)
    val useTypeTableInSerializer: Boolean = configuration.getBoolean(JVMConfigurationKeys.USE_TYPE_TABLE)
@@ -168,7 +173,7 @@ class GenerationState @JvmOverloads constructor(

    val generateParametersMetadata: Boolean = configuration.getBoolean(JVMConfigurationKeys.PARAMETERS_METADATA)

-    val languageVersionSettings = configuration.languageVersionSettings
+
    val shouldInlineConstVals = languageVersionSettings.supportsFeature(LanguageFeature.InlineConstVals)

    init {
@@ -93,9 +93,12 @@ class K2JVMCompilerArguments : CommonCompilerArguments() {
    )
    var additionalJavaModules: Array<String>? by FreezableVar(null)

-    @Argument(value = "-Xno-call-assertions", description = "Don't generate not-null assertion after each invocation of method returning not-null")
+    @Argument(value = "-Xno-call-assertions", description = "Don't generate not-null assertions for arguments of platform types")
    var noCallAssertions: Boolean by FreezableVar(false)

+    @Argument(value = "-Xno-receiver-assertions", description = "Don't generate not-null assertion for extension receiver arguments of platform types")
+    var noReceiverAssertions: Boolean by FreezableVar(false)
+
    @Argument(value = "-Xno-param-assertions", description = "Don't generate not-null assertions on parameters of methods accessible from Java")
    var noParamAssertions: Boolean by FreezableVar(false)

@@ -341,6 +341,7 @@ class K2JVMCompiler : CLICompiler<K2JVMCompilerArguments>() {

        private fun putAdvancedOptions(configuration: CompilerConfiguration, arguments: K2JVMCompilerArguments) {
            configuration.put(JVMConfigurationKeys.DISABLE_CALL_ASSERTIONS, arguments.noCallAssertions)
+            configuration.put(JVMConfigurationKeys.DISABLE_RECEIVER_ASSERTIONS, arguments.noReceiverAssertions)
            configuration.put(JVMConfigurationKeys.DISABLE_PARAM_ASSERTIONS, arguments.noParamAssertions)
            configuration.put(JVMConfigurationKeys.DISABLE_OPTIMIZATION, arguments.noOptimize)
            configuration.put(JVMConfigurationKeys.INHERIT_MULTIFILE_PARTS, arguments.inheritMultifileParts)
@@ -358,6 +359,8 @@ class K2JVMCompiler : CLICompiler<K2JVMCompilerArguments>() {
            configuration.put(JVMConfigurationKeys.ADD_BUILT_INS_FROM_COMPILER_TO_DEPENDENCIES, arguments.addCompilerBuiltIns)
            configuration.put(JVMConfigurationKeys.CREATE_BUILT_INS_FROM_MODULE_DEPENDENCIES, arguments.loadBuiltInsFromDependencies)

+
+
            arguments.declarationsOutputPath?.let { configuration.put(JVMConfigurationKeys.DECLARATIONS_JSON_PATH, it) }
        }

@@ -50,6 +50,8 @@ public class JVMConfigurationKeys {

    public static final CompilerConfigurationKey<Boolean> DISABLE_CALL_ASSERTIONS =
            CompilerConfigurationKey.create("disable not-null call assertions");
+    public static final CompilerConfigurationKey<Boolean> DISABLE_RECEIVER_ASSERTIONS =
+            CompilerConfigurationKey.create("disable not-null call receiver assertions");
    public static final CompilerConfigurationKey<Boolean> DISABLE_PARAM_ASSERTIONS =
            CompilerConfigurationKey.create("disable not-null parameter assertions");
    public static final CompilerConfigurationKey<Boolean> DISABLE_OPTIMIZATION =
@@ -18,6 +18,8 @@ package org.jetbrains.kotlin.resolve.jvm

 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
 import org.jetbrains.kotlin.psi.KtExpression
+import org.jetbrains.kotlin.resolve.scopes.receivers.ExpressionReceiver
+import org.jetbrains.kotlin.resolve.scopes.receivers.ReceiverValue
 import org.jetbrains.kotlin.util.slicedMap.BasicWritableSlice
 import org.jetbrains.kotlin.util.slicedMap.RewritePolicy
 import org.jetbrains.kotlin.util.slicedMap.Slices
@@ -27,6 +29,9 @@ object JvmBindingContextSlices {
    @JvmField
    val RUNTIME_ASSERTION_INFO: WritableSlice<KtExpression, RuntimeAssertionInfo> = BasicWritableSlice(RewritePolicy.DO_NOTHING)

+    @JvmField
+    val RECEIVER_RUNTIME_ASSERTION_INFO: WritableSlice<ExpressionReceiver, RuntimeAssertionInfo> = BasicWritableSlice(RewritePolicy.DO_NOTHING)
+
    @JvmField
    val LOAD_FROM_JAVA_SIGNATURE_ERRORS: WritableSlice<DeclarationDescriptor, List<String>> = Slices.createCollectiveSlice()

@@ -17,14 +17,24 @@
 package org.jetbrains.kotlin.resolve.jvm

 import com.intellij.openapi.util.text.StringUtil
+import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.descriptors.ReceiverParameterDescriptor
 import org.jetbrains.kotlin.load.java.typeEnhancement.hasEnhancedNullability
 import org.jetbrains.kotlin.psi.KtExpression
+import org.jetbrains.kotlin.resolve.calls.callUtil.isSafeCall
 import org.jetbrains.kotlin.resolve.calls.checkers.AdditionalTypeChecker
+import org.jetbrains.kotlin.resolve.calls.checkers.CallChecker
+import org.jetbrains.kotlin.resolve.calls.checkers.CallCheckerContext
 import org.jetbrains.kotlin.resolve.calls.context.ResolutionContext
+import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
+import org.jetbrains.kotlin.resolve.calls.smartcasts.DataFlowValue
 import org.jetbrains.kotlin.resolve.calls.smartcasts.DataFlowValueFactory
+import org.jetbrains.kotlin.resolve.scopes.receivers.ExpressionReceiver
+import org.jetbrains.kotlin.resolve.scopes.receivers.ReceiverValue
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.TypeUtils
 import org.jetbrains.kotlin.types.isError
+import org.jetbrains.kotlin.utils.addToStdlib.safeAs

 class RuntimeAssertionInfo(val needNotNullAssertion: Boolean, val message: String) {
    interface DataFlowExtras {
@@ -73,6 +83,19 @@ class RuntimeAssertionInfo(val needNotNullAssertion: Boolean, val message: Strin
    }
 }

+class RuntimeAssertionsDataFlowExtras(
+        private val c: ResolutionContext<*>,
+        private val dataFlowValue: DataFlowValue,
+        private val expression: KtExpression
+) : RuntimeAssertionInfo.DataFlowExtras {
+    override val canBeNull: Boolean
+        get() = c.dataFlowInfo.getStableNullability(dataFlowValue).canBeNull()
+    override val possibleTypes: Set<KotlinType>
+        get() = c.dataFlowInfo.getCollectedTypes(dataFlowValue)
+    override val presentableText: String
+        get() = StringUtil.trimMiddle(expression.text, 50)
+}
+
 object RuntimeAssertionsTypeChecker : AdditionalTypeChecker {
    override fun checkType(expression: KtExpression, expressionType: KotlinType, expressionTypeWithSmartCast: KotlinType, c: ResolutionContext<*>) {
        if (TypeUtils.noExpectedType(c.expectedType)) return
@@ -80,20 +103,39 @@ object RuntimeAssertionsTypeChecker : AdditionalTypeChecker {
        val assertionInfo = RuntimeAssertionInfo.create(
                c.expectedType,
                expressionType,
-                object : RuntimeAssertionInfo.DataFlowExtras {
-                    override val canBeNull: Boolean
-                        get() = c.dataFlowInfo.getStableNullability(dataFlowValue).canBeNull()
-                    override val possibleTypes: Set<KotlinType>
-                        get() = c.dataFlowInfo.getCollectedTypes(dataFlowValue)
-                    override val presentableText: String
-                        get() = StringUtil.trimMiddle(expression.text, 50)
-
-                    private val dataFlowValue = DataFlowValueFactory.createDataFlowValue(expression, expressionType, c)
-                }
+                RuntimeAssertionsDataFlowExtras(c, DataFlowValueFactory.createDataFlowValue(expression, expressionType, c), expression)
        )

        if (assertionInfo != null) {
            c.trace.record(JvmBindingContextSlices.RUNTIME_ASSERTION_INFO, expression, assertionInfo)
        }
    }
+
 }
+
+object RuntimeAssertionsOnExtensionReceiverCallChecker : CallChecker {
+    override fun check(resolvedCall: ResolvedCall<*>, reportOn: PsiElement, context: CallCheckerContext) {
+        if (resolvedCall.call.isSafeCall()) return
+
+        val callee = resolvedCall.resultingDescriptor
+        checkReceiver(callee.extensionReceiverParameter, resolvedCall.extensionReceiver, context)
+    }
+
+    private fun checkReceiver(receiverParameter: ReceiverParameterDescriptor?, receiverValue: ReceiverValue?, context: CallCheckerContext) {
+        if (receiverParameter == null || receiverValue == null) return
+        val expressionReceiverValue = receiverValue.safeAs<ExpressionReceiver>() ?: return
+        val receiverExpression = expressionReceiverValue.expression
+        val c = context.resolutionContext
+        val dataFlowValue = DataFlowValueFactory.createDataFlowValue(receiverExpression, receiverValue.type, c)
+
+        val assertionInfo = RuntimeAssertionInfo.create(
+                receiverParameter.type,
+                receiverValue.type,
+                RuntimeAssertionsDataFlowExtras(c, dataFlowValue, receiverExpression)
+        )
+
+        if (assertionInfo != null) {
+            c.trace.record(JvmBindingContextSlices.RECEIVER_RUNTIME_ASSERTION_INFO, expressionReceiverValue, assertionInfo)
+        }
+    }
+}
@@ -53,7 +53,8 @@ object JvmPlatformConfigurator : PlatformConfigurator(
                UnsupportedSyntheticCallableReferenceChecker(),
                SuperCallWithDefaultArgumentsChecker(),
                ProtectedSyntheticExtensionCallChecker,
-                ReifiedTypeParameterSubstitutionChecker()
+                ReifiedTypeParameterSubstitutionChecker(),
+                RuntimeAssertionsOnExtensionReceiverCallChecker
        ),

        additionalTypeCheckers = listOf(
@@ -13,9 +13,10 @@ where advanced options include:
                             Specify global behavior for JSR-305 nullability annotations: ignore, treat as other supported nullability annotations, or report a warning
  -Xload-builtins-from-dependencies
                             Load definitions of built-in declarations from module dependencies, instead of from the compiler
-  -Xno-call-assertions       Don't generate not-null assertion after each invocation of method returning not-null
+  -Xno-call-assertions       Don't generate not-null assertions for arguments of platform types
  -Xno-optimize              Disable optimizations
  -Xno-param-assertions      Don't generate not-null assertions on parameters of methods accessible from Java
+  -Xno-receiver-assertions   Don't generate not-null assertion for extension receiver arguments of platform types
  -Xreport-perf              Report detailed performance statistics
  -Xscript-resolver-environment=<key=value[,]>
                             Script resolver environment in key-value pairs (the value could be quoted and escaped)
@@ -0,0 +1,28 @@
+// TARGET_BACKEND: JVM
+// WITH_RUNTIME
+// FILE: test.kt
+// LANGUAGE_VERSION: 1.2
+import kotlin.test.*
+
+var component1Evaluated = false
+
+// NB extension receiver is nullable
+operator fun J?.component1() = 1.also { component1Evaluated = true }
+
+private operator fun J.component2() = 2
+
+fun use(x: Any) {}
+
+fun box(): String {
+    assertFailsWith<IllegalArgumentException> {
+        val (a, b) = J.j()
+    }
+    if (!component1Evaluated) return "component1 should be evaluated"
+    return "OK"
+}
+
+
+// FILE: J.java
+public class J {
+    public static J j() { return null; }
+}
@@ -0,0 +1,17 @@
+// TARGET_BACKEND: JVM
+// FILE: test.kt
+// WITH_RUNTIME
+// LANGUAGE_VERSION: 1.1
+private operator fun A.inc() = A()
+
+fun box(): String {
+    var aNull = A.n()
+    aNull++
+    // NB no exception is thrown in language version 1.1
+    return "OK"
+}
+
+// FILE: A.java
+public class A {
+    public static A n() { return null; }
+}
@@ -0,0 +1,21 @@
+// TARGET_BACKEND: JVM
+// FILE: test.kt
+// WITH_RUNTIME
+// LANGUAGE_VERSION: 1.2
+import kotlin.test.*
+
+private operator fun A.inc() = A()
+
+fun box(): String {
+    assertFailsWith<IllegalArgumentException> {
+        var aNull = A.n()
+        aNull++
+    }
+
+    return "OK"
+}
+
+// FILE: A.java
+public class A {
+    public static A n() { return null; }
+}
@@ -0,0 +1,21 @@
+// TARGET_BACKEND: JVM
+// FILE: test.kt
+// WITH_RUNTIME
+// LANGUAGE_VERSION: 1.1
+import kotlin.test.*
+
+operator fun A.inc() = A()
+
+fun box(): String {
+    assertFailsWith<IllegalArgumentException> {
+        var aNull = A.n()
+        aNull++
+    }
+
+    return "OK"
+}
+
+// FILE: A.java
+public class A {
+    public static A n() { return null; }
+}
@@ -0,0 +1,21 @@
+// TARGET_BACKEND: JVM
+// FILE: test.kt
+// WITH_RUNTIME
+// LANGUAGE_VERSION: 1.2
+import kotlin.test.*
+
+operator fun A.inc() = A()
+
+fun box(): String {
+    assertFailsWith<IllegalArgumentException> {
+        var aNull = A.n()
+        aNull++
+    }
+
+    return "OK"
+}
+
+// FILE: A.java
+public class A {
+    public static A n() { return null; }
+}
@@ -0,0 +1,17 @@
+// TARGET_BACKEND: JVM
+// WITH_RUNTIME
+// FILE: test.kt
+// LANGUAGE_VERSION: 1.1
+import kotlin.test.*
+
+fun String.extension() {}
+
+fun box(): String {
+    assertFailsWith<IllegalArgumentException> { J.s().extension() }
+    return "OK"
+}
+
+// FILE: J.java
+public class J {
+    public static String s() { return null; }
+}
@@ -0,0 +1,17 @@
+// TARGET_BACKEND: JVM
+// WITH_RUNTIME
+// FILE: test.kt
+// LANGUAGE_VERSION: 1.2
+import kotlin.test.*
+
+fun String.extension() {}
+
+fun box(): String {
+    assertFailsWith<IllegalStateException> { J.s().extension() }
+    return "OK"
+}
+
+// FILE: J.java
+public class J {
+    public static String s() { return null; }
+}
@@ -0,0 +1,17 @@
+// TARGET_BACKEND: JVM
+// WITH_RUNTIME
+// FILE: test.kt
+// LANGUAGE_VERSION: 1.1
+import kotlin.test.*
+
+inline fun String.extension() {}
+
+fun box(): String {
+    J.s().extension() // NB no exception thrown
+    return "OK"
+}
+
+// FILE: J.java
+public class J {
+    public static String s() { return null; }
+}
@@ -0,0 +1,19 @@
+// TARGET_BACKEND: JVM
+// WITH_RUNTIME
+// FILE: test.kt
+// LANGUAGE_VERSION: 1.2
+import kotlin.test.*
+
+inline fun String.extension() {}
+
+fun box(): String {
+    assertFailsWith<IllegalStateException> {
+        J.s().extension()
+    }
+    return "OK"
+}
+
+// FILE: J.java
+public class J {
+    public static String s() { return null; }
+}
@@ -0,0 +1,20 @@
+// TARGET_BACKEND: JVM
+// WITH_RUNTIME
+// FILE: test.kt
+// LANGUAGE_VERSION: 1.2
+import kotlin.test.*
+
+class C {
+    fun test() { J.s().memberExtension() }
+    fun String.memberExtension() {}
+}
+
+fun box(): String {
+    assertFailsWith<IllegalStateException> { C().test() }
+    return "OK"
+}
+
+// FILE: J.java
+public class J {
+    public static String s() { return null; }
+}
@@ -0,0 +1,22 @@
+// TARGET_BACKEND: JVM
+// WITH_RUNTIME
+// FILE: test.kt
+// LANGUAGE_VERSION: 1.2
+import kotlin.test.*
+
+class C {
+    fun test() { J.s().memberExtension() }
+    private fun String.memberExtension() {}
+}
+
+fun box(): String {
+    assertFailsWith<IllegalStateException> {
+        C().test()
+    }
+    return "OK"
+}
+
+// FILE: J.java
+public class J {
+    public static String s() { return null; }
+}
@@ -11592,6 +11592,81 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
        }
    }

+    @TestMetadata("compiler/testData/codegen/box/nullabilityAssertions")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class NullabilityAssertions extends AbstractIrBlackBoxCodegenTest {
+        public void testAllFilesPresentInNullabilityAssertions() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/nullabilityAssertions"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JVM, true);
+        }
+
+        @TestMetadata("destructuringAssignmentWithNullabilityAssertionOnExtensionReceiver_lv12.kt")
+        public void testDestructuringAssignmentWithNullabilityAssertionOnExtensionReceiver_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/destructuringAssignmentWithNullabilityAssertionOnExtensionReceiver_lv12.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("incWithNullabilityAssertionOnExtensionReceiverInPrivateOperator_lv11.kt")
+        public void testIncWithNullabilityAssertionOnExtensionReceiverInPrivateOperator_lv11() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/incWithNullabilityAssertionOnExtensionReceiverInPrivateOperator_lv11.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("incWithNullabilityAssertionOnExtensionReceiverInPrivateOperator_lv12.kt")
+        public void testIncWithNullabilityAssertionOnExtensionReceiverInPrivateOperator_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/incWithNullabilityAssertionOnExtensionReceiverInPrivateOperator_lv12.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("incWithNullabilityAssertionOnExtensionReceiver_lv11.kt")
+        public void testIncWithNullabilityAssertionOnExtensionReceiver_lv11() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/incWithNullabilityAssertionOnExtensionReceiver_lv11.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("incWithNullabilityAssertionOnExtensionReceiver_lv12.kt")
+        public void testIncWithNullabilityAssertionOnExtensionReceiver_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/incWithNullabilityAssertionOnExtensionReceiver_lv12.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("nullabilityAssertionOnExtensionReceiver_lv11.kt")
+        public void testNullabilityAssertionOnExtensionReceiver_lv11() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/nullabilityAssertionOnExtensionReceiver_lv11.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("nullabilityAssertionOnExtensionReceiver_lv12.kt")
+        public void testNullabilityAssertionOnExtensionReceiver_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/nullabilityAssertionOnExtensionReceiver_lv12.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("nullabilityAssertionOnInlineFunExtensionReceiver_lv11.kt")
+        public void testNullabilityAssertionOnInlineFunExtensionReceiver_lv11() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/nullabilityAssertionOnInlineFunExtensionReceiver_lv11.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("nullabilityAssertionOnInlineFunExtensionReceiver_lv12.kt")
+        public void testNullabilityAssertionOnInlineFunExtensionReceiver_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/nullabilityAssertionOnInlineFunExtensionReceiver_lv12.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("nullabilityAssertionOnMemberExtensionReceiver_lv12.kt")
+        public void testNullabilityAssertionOnMemberExtensionReceiver_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/nullabilityAssertionOnMemberExtensionReceiver_lv12.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("nullabilityAssertionOnPrivateMemberExtensionReceiver_lv12.kt")
+        public void testNullabilityAssertionOnPrivateMemberExtensionReceiver_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/nullabilityAssertionOnPrivateMemberExtensionReceiver_lv12.kt");
+            doTest(fileName);
+        }
+    }
+
    @TestMetadata("compiler/testData/codegen/box/objectIntrinsics")
    @TestDataPath("$PROJECT_ROOT")
    @RunWith(JUnit3RunnerWithInners.class)
@@ -11592,6 +11592,81 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
        }
    }

+    @TestMetadata("compiler/testData/codegen/box/nullabilityAssertions")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class NullabilityAssertions extends AbstractBlackBoxCodegenTest {
+        public void testAllFilesPresentInNullabilityAssertions() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/nullabilityAssertions"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JVM, true);
+        }
+
+        @TestMetadata("destructuringAssignmentWithNullabilityAssertionOnExtensionReceiver_lv12.kt")
+        public void testDestructuringAssignmentWithNullabilityAssertionOnExtensionReceiver_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/destructuringAssignmentWithNullabilityAssertionOnExtensionReceiver_lv12.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("incWithNullabilityAssertionOnExtensionReceiverInPrivateOperator_lv11.kt")
+        public void testIncWithNullabilityAssertionOnExtensionReceiverInPrivateOperator_lv11() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/incWithNullabilityAssertionOnExtensionReceiverInPrivateOperator_lv11.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("incWithNullabilityAssertionOnExtensionReceiverInPrivateOperator_lv12.kt")
+        public void testIncWithNullabilityAssertionOnExtensionReceiverInPrivateOperator_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/incWithNullabilityAssertionOnExtensionReceiverInPrivateOperator_lv12.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("incWithNullabilityAssertionOnExtensionReceiver_lv11.kt")
+        public void testIncWithNullabilityAssertionOnExtensionReceiver_lv11() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/incWithNullabilityAssertionOnExtensionReceiver_lv11.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("incWithNullabilityAssertionOnExtensionReceiver_lv12.kt")
+        public void testIncWithNullabilityAssertionOnExtensionReceiver_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/incWithNullabilityAssertionOnExtensionReceiver_lv12.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("nullabilityAssertionOnExtensionReceiver_lv11.kt")
+        public void testNullabilityAssertionOnExtensionReceiver_lv11() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/nullabilityAssertionOnExtensionReceiver_lv11.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("nullabilityAssertionOnExtensionReceiver_lv12.kt")
+        public void testNullabilityAssertionOnExtensionReceiver_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/nullabilityAssertionOnExtensionReceiver_lv12.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("nullabilityAssertionOnInlineFunExtensionReceiver_lv11.kt")
+        public void testNullabilityAssertionOnInlineFunExtensionReceiver_lv11() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/nullabilityAssertionOnInlineFunExtensionReceiver_lv11.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("nullabilityAssertionOnInlineFunExtensionReceiver_lv12.kt")
+        public void testNullabilityAssertionOnInlineFunExtensionReceiver_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/nullabilityAssertionOnInlineFunExtensionReceiver_lv12.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("nullabilityAssertionOnMemberExtensionReceiver_lv12.kt")
+        public void testNullabilityAssertionOnMemberExtensionReceiver_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/nullabilityAssertionOnMemberExtensionReceiver_lv12.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("nullabilityAssertionOnPrivateMemberExtensionReceiver_lv12.kt")
+        public void testNullabilityAssertionOnPrivateMemberExtensionReceiver_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/nullabilityAssertionOnPrivateMemberExtensionReceiver_lv12.kt");
+            doTest(fileName);
+        }
+    }
+
    @TestMetadata("compiler/testData/codegen/box/objectIntrinsics")
    @TestDataPath("$PROJECT_ROOT")
    @RunWith(JUnit3RunnerWithInners.class)
@@ -11592,6 +11592,81 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
        }
    }

+    @TestMetadata("compiler/testData/codegen/box/nullabilityAssertions")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class NullabilityAssertions extends AbstractLightAnalysisModeTest {
+        public void testAllFilesPresentInNullabilityAssertions() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/nullabilityAssertions"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JVM, true);
+        }
+
+        @TestMetadata("destructuringAssignmentWithNullabilityAssertionOnExtensionReceiver_lv12.kt")
+        public void testDestructuringAssignmentWithNullabilityAssertionOnExtensionReceiver_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/destructuringAssignmentWithNullabilityAssertionOnExtensionReceiver_lv12.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("incWithNullabilityAssertionOnExtensionReceiverInPrivateOperator_lv11.kt")
+        public void testIncWithNullabilityAssertionOnExtensionReceiverInPrivateOperator_lv11() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/incWithNullabilityAssertionOnExtensionReceiverInPrivateOperator_lv11.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("incWithNullabilityAssertionOnExtensionReceiverInPrivateOperator_lv12.kt")
+        public void testIncWithNullabilityAssertionOnExtensionReceiverInPrivateOperator_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/incWithNullabilityAssertionOnExtensionReceiverInPrivateOperator_lv12.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("incWithNullabilityAssertionOnExtensionReceiver_lv11.kt")
+        public void testIncWithNullabilityAssertionOnExtensionReceiver_lv11() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/incWithNullabilityAssertionOnExtensionReceiver_lv11.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("incWithNullabilityAssertionOnExtensionReceiver_lv12.kt")
+        public void testIncWithNullabilityAssertionOnExtensionReceiver_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/incWithNullabilityAssertionOnExtensionReceiver_lv12.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("nullabilityAssertionOnExtensionReceiver_lv11.kt")
+        public void testNullabilityAssertionOnExtensionReceiver_lv11() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/nullabilityAssertionOnExtensionReceiver_lv11.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("nullabilityAssertionOnExtensionReceiver_lv12.kt")
+        public void testNullabilityAssertionOnExtensionReceiver_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/nullabilityAssertionOnExtensionReceiver_lv12.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("nullabilityAssertionOnInlineFunExtensionReceiver_lv11.kt")
+        public void testNullabilityAssertionOnInlineFunExtensionReceiver_lv11() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/nullabilityAssertionOnInlineFunExtensionReceiver_lv11.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("nullabilityAssertionOnInlineFunExtensionReceiver_lv12.kt")
+        public void testNullabilityAssertionOnInlineFunExtensionReceiver_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/nullabilityAssertionOnInlineFunExtensionReceiver_lv12.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("nullabilityAssertionOnMemberExtensionReceiver_lv12.kt")
+        public void testNullabilityAssertionOnMemberExtensionReceiver_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/nullabilityAssertionOnMemberExtensionReceiver_lv12.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("nullabilityAssertionOnPrivateMemberExtensionReceiver_lv12.kt")
+        public void testNullabilityAssertionOnPrivateMemberExtensionReceiver_lv12() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/nullabilityAssertions/nullabilityAssertionOnPrivateMemberExtensionReceiver_lv12.kt");
+            doTest(fileName);
+        }
+    }
+
    @TestMetadata("compiler/testData/codegen/box/objectIntrinsics")
    @TestDataPath("$PROJECT_ROOT")
    @RunWith(JUnit3RunnerWithInners.class)
@@ -54,6 +54,7 @@ enum class LanguageFeature(
    InlineDefaultFunctionalParameters(KOTLIN_1_2),
    SoundSmartCastsAfterTry(KOTLIN_1_2),
    DeprecatedFieldForInvisibleCompanionObject(KOTLIN_1_2),
+    NullabilityAssertionOnExtensionReceiver(KOTLIN_1_2),
    SafeCastCheckBoundSmartCasts(KOTLIN_1_2),
    BooleanElvisBoundSmartCasts(KOTLIN_1_2),
    CapturedInClosureSmartCasts(KOTLIN_1_2),
@@ -12954,6 +12954,15 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
        }
    }

+    @TestMetadata("compiler/testData/codegen/box/nullabilityAssertions")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class NullabilityAssertions extends AbstractJsCodegenBoxTest {
+        public void testAllFilesPresentInNullabilityAssertions() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/nullabilityAssertions"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JS, true);
+        }
+    }
+
    @TestMetadata("compiler/testData/codegen/box/objectIntrinsics")
    @TestDataPath("$PROJECT_ROOT")
    @RunWith(JUnit3RunnerWithInners.class)