Allow class initializer without primary constructor

compiler/frontend/src/org/jetbrains/kotlin/resolve/BodyResolver.java

@@ -364,7 +364,7 @@ public class BodyResolver {
             @NotNull ClassDescriptorWithResolutionScopes classDescriptor
     ) {
         JetScope scopeForInitializers = classDescriptor.getScopeForInitializerResolution();
-        if (classDescriptor.getUnsubstitutedPrimaryConstructor() != null) {
+        if (!classDescriptor.getConstructors().isEmpty()) {
             expressionTypingServices.getType(scopeForInitializers, anonymousInitializer.getBody(), NO_EXPECTED_TYPE, c.getOuterDataFlowInfo(), trace);
             processModifiersOnInitializer(anonymousInitializer, scopeForInitializers);
         }

compiler/testData/diagnostics/tests/secondaryConstructors/classInitializersWithoutPrimary.kt

@@ -0,0 +1,4 @@
+class A {
+    constructor() {}
+    init {}
+}

compiler/testData/diagnostics/tests/secondaryConstructors/classInitializersWithoutPrimary.txt

@@ -0,0 +1,8 @@
+package
+
+internal final class A {
+    public constructor A()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

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

@@ -10403,6 +10403,12 @@ public class JetDiagnosticsTestGenerated extends AbstractJetDiagnosticsTest {
                 doTest(fileName);
             }
 
+            @TestMetadata("classInitializersWithoutPrimary.kt")
+            public void testClassInitializersWithoutPrimary() throws Exception {
+                String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/secondaryConstructors/classInitializersWithoutPrimary.kt");
+                doTest(fileName);
+            }
+
             @TestMetadata("constructorCallType.kt")
             public void testConstructorCallType() throws Exception {
                 String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/secondaryConstructors/constructorCallType.kt");