FIC: support suspend conversions in jvm codegen

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

@@ -230,6 +230,8 @@ public class ClosureCodegen extends MemberCodegen<KtElement> {
                             erasedInterfaceFunction.getValueParameters(), erasedInterfaceFunction.getReturnType(),
                             Modality.OPEN, erasedInterfaceFunction.getVisibility());
 
+        descriptorForBridges.setSuspend(descriptor.isSuspend());
+
         DescriptorUtilsKt.setSingleOverridden(descriptorForBridges, erasedInterfaceFunction);
         codegen.generateBridges(descriptorForBridges);
     }

compiler/backend/src/org/jetbrains/kotlin/codegen/coroutines/coroutineCodegenUtil.kt

@@ -8,6 +8,7 @@ package org.jetbrains.kotlin.codegen.coroutines
 import com.intellij.openapi.project.Project
 import org.jetbrains.kotlin.backend.common.COROUTINE_SUSPENDED_NAME
 import org.jetbrains.kotlin.backend.common.isBuiltInSuspendCoroutineUninterceptedOrReturn
+import org.jetbrains.kotlin.builtins.isBuiltinFunctionalClassDescriptor
 import org.jetbrains.kotlin.builtins.isBuiltinFunctionalType
 import org.jetbrains.kotlin.codegen.*
 import org.jetbrains.kotlin.codegen.binding.CodegenBinding
@@ -263,7 +264,7 @@ fun <D : FunctionDescriptor> getOrCreateJvmSuspendFunctionView(
         annotations = Annotations.EMPTY,
         name = CONTINUATION_PARAMETER_NAME,
         // Add j.l.Object to invoke(), because that is the type of parameters we have in FunctionN+1
-        outType = if (function.containingDeclaration.safeAs<ClassDescriptor>()?.defaultType?.isBuiltinFunctionalType == true)
+        outType = if (function.containingDeclaration.safeAs<ClassDescriptor>()?.isBuiltinFunctionalClassDescriptor == true)
             function.builtIns.nullableAnyType
         else
             function.getContinuationParameterTypeOfSuspendFunction(isReleaseCoroutines),