Fix type arguments saving for arrays

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/IrInterpreter.kt

@@ -152,7 +152,8 @@ class IrInterpreter(private val irBuiltIns: IrBuiltIns, private val bodyMap: Map
 
     private fun MethodHandle?.invokeMethod(irFunction: IrFunction): ExecutionResult {
         this ?: return handleIntrinsicMethods(irFunction)
-        val result = withExceptionHandler { this.invokeWithArguments(irFunction.getArgsForMethodInvocation(stack.getAll())) }
+        val argsForMethodInvocation = irFunction.getArgsForMethodInvocation(stack.getAll())
+        val result = withExceptionHandler { this.invokeWithArguments(argsForMethodInvocation) }
         stack.pushReturnValue(result.toState(result.getType(irFunction.returnType)))
 
         return Next
@@ -220,8 +221,8 @@ class IrInterpreter(private val irBuiltIns: IrBuiltIns, private val bodyMap: Map
                 else -> throw InterpreterError("Unsupported number of arguments for invocation as builtin functions")
             }
         }
-
-        stack.pushReturnValue(result.toState(result.getType(irFunction.returnType)))
+        val typeArguments = if (methodName == "CHECK_NOT_NULL") args.single().typeArguments else listOf()
+        stack.pushReturnValue(result.toState(result.getType(irFunction.returnType)).apply { addTypeArguments(typeArguments) })
         return Next
     }
 
@@ -731,7 +732,13 @@ class IrInterpreter(private val irBuiltIns: IrBuiltIns, private val bodyMap: Map
                     fields.add(Variable(storageProperty.symbol, unsignedArray))
                 }
             }
-            else -> args.toPrimitiveStateArray(expression.type)
+            else -> args.toPrimitiveStateArray(expression.type).apply {
+                if (expression.type.isArray()) {
+                    val arrayTypeArgument = expression.varargElementType.classOrNull?.let { Common(it.owner) }
+                        ?: stack.getVariable(expression.varargElementType.classifierOrFail).state
+                    this.addTypeArguments(listOf(Variable(irBuiltIns.arrayClass.owner.typeParameters.single().symbol, arrayTypeArgument)))
+                }
+            }
         }
         stack.pushReturnValue(array)
         return Next

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/intrinsics/IntrinsicImplementations.kt

@@ -15,6 +15,7 @@ import org.jetbrains.kotlin.ir.declarations.IrEnumEntry
 import org.jetbrains.kotlin.ir.declarations.IrFunction
 import org.jetbrains.kotlin.ir.interpreter.exceptions.throwAsUserException
 import org.jetbrains.kotlin.ir.types.classOrNull
+import org.jetbrains.kotlin.ir.types.isCharArray
 import org.jetbrains.kotlin.ir.util.*
 
 internal sealed class IntrinsicBase {
@@ -170,7 +171,7 @@ internal object ArrayConstructor : IntrinsicBase() {
     override fun evaluate(irFunction: IrFunction, stack: Stack, interpret: IrElement.() -> ExecutionResult): ExecutionResult {
         val sizeDescriptor = irFunction.valueParameters[0].symbol
         val size = stack.getVariable(sizeDescriptor).state.asInt()
-        val arrayValue = MutableList<Any>(size) { 0 }
+        val arrayValue = MutableList<Any>(size) { if (irFunction.returnType.isCharArray()) 0.toChar() else 0 }
 
         if (irFunction.valueParameters.size == 2) {
             val initDescriptor = irFunction.valueParameters[1].symbol

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/state/State.kt

@@ -53,7 +53,7 @@ internal fun State.isSubtypeOf(other: IrType): Boolean {
         val thisClass = this.typeArguments.single().state.irClass.symbol
         val otherArgument = (other as IrSimpleType).arguments.single()
         if (otherArgument is IrStarProjection) return true
-        return thisClass.isSubtypeOfClass(otherArgument.typeOrNull!!.classOrNull!!)
+        return otherArgument.typeOrNull?.classOrNull?.let { thisClass.isSubtypeOfClass(it) } ?: true
     }
 
     if (this is Lambda) {