only stub default constructor when compiling against .java source files

compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/resolve/KotlinClassifiersCache.kt

@@ -159,6 +159,7 @@ class MockKotlinClassifier(override val classId: ClassId,
     override val methods get() = shouldNotBeCalled()
     override val fields get() = shouldNotBeCalled()
     override val constructors get() = shouldNotBeCalled()
+    override fun hasDefaultConstructor() = shouldNotBeCalled()
     override val annotations get() = shouldNotBeCalled()
     override val isDeprecatedInJavaDoc get() = shouldNotBeCalled()
     override fun findAnnotation(fqName: FqName) = shouldNotBeCalled()

compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/symbols/FakeSymbolBasedClass.kt

@@ -73,6 +73,8 @@ class FakeSymbolBasedClass(
 
     override val constructors: Collection<JavaConstructor> get() = emptyList()
 
+    override fun hasDefaultConstructor() = false
+
     override val innerClassNames: Collection<Name> get() = emptyList()
 
     override val virtualFile: VirtualFile? by lazy {

compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/symbols/SymbolBasedClass.kt

@@ -133,6 +133,8 @@ class SymbolBasedClass(
             .filter { it.kind == ElementKind.CONSTRUCTOR }
             .map { SymbolBasedConstructor(it as ExecutableElement, this, javac) }
 
+    override fun hasDefaultConstructor() = false // default constructors are explicit in symbols
+
     override val innerClassNames: Collection<Name>
         get() = innerClasses.keys
 

compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/trees/TreeBasedClass.kt

@@ -134,6 +134,8 @@ class TreeBasedClass(
                     TreeBasedConstructor(constructor as JCTree.JCMethodDecl, compilationUnit, this, javac)
                 }
 
+    override fun hasDefaultConstructor() = !isInterface && constructors.isEmpty()
+
     override val innerClassNames: Collection<Name>
         get() = innerClasses.keys